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TONE/PULSE SWITCHABLE DIALER WITH LCD INTERFACE TONE/PULSE SWITCHABLE DIALER WITH LCD INTERFACE AND DUAL-TONE MELODY GENERATOR AND DUAL-TONE MELODY GENERATOR
EM91420 SERIES EM91420 SERIES
GENERAL DESCRIPTION
The EM91420 is a series of tone/pulse switchable dialers that is composed of T/P dialer and T/P dialer with 20-set memories. The EM91420 series provides necessary functions of telephone set for application in any environment, such as Pulse dialing, Tone (DTMF) dialing, Handfree dialing, keying tone ,and lock functions. The lock function is designed to inhibit toll dialing operation. Beside this, melody generator, ring detector and SDO (Serial Data Output) functions are provided in advance version. Melody generator will output dual-tone music in line hold duration. Ring detector can prevent illegal dialing from pocket dialer. The SDO is designed to drive LCD driver and voice synthesizer. In this application, the dialing numbers can be displayed on LCD screen with EM32100 ( or EM32116 ).
FEATURES
* Tone/Pulse switchable. * Wide operating voltage from 2.0 V to 5.5 V. * Low operating current, 0.15 mA (Pulse) and 0.3 mA (Tone) typically. * Adding resistor on keyboard scan pin that can select many telephone specifications, such as : Pulse rate, M/B ratio, Flash time, lock dialing functions. * SDO function supports LCD driver and voice synthesizer to indicate dialing numbers. * Line hold function is designed for stopping conversation temporality. * Melody generator provides music on hold function. * Lock function provides conventionality key lock and password lock operations. * Ring detector is designed to prevent illegal dialing from pocket dialer. * 20-set three touch repertory memory, each one can hold data up to 16 digits. * A 32-digit LNB (last number) redial memory. * Keytone function provides rapidly keying recognition. * Handfree function provides on-hook dialing and speakerphone application. * Pause and P-T time are fixed to 3.6 seconds. * Tone duration and inter-tone pause time are fixed to 98 ms. * Using 3.579545 MHz crystal or ceramic resonator. * Package forms: PDIP, skinny.
ORDERING INFORMATION
Versions list and function outline VERSION LNB KT EM91420A EM91420B EM91420C EM91420D Note : PDP = Pocket Dialer Prevented HOLD(music) LOCK HF SDO(LCD) PDP

* This specification are subject to be changed without notice.
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TONE/PULSE SWITCHABLE DIALER WITH LCD INTERFACE AND DUAL-TONE MELODY GENERATOR
EM91420
Pin Assignment
EM91420AP
COL5 COL4/KT COL3 COL2 COL1 XIN XOUT XMUTE VSS 1 2 3 4 5 6 7 8 9 18 17 16 15 14 13 12 11 10 HDO PO ROW4 ROW3 ROW2 ROW1 HKS VDD DTMF
EM91420BP
COL5 COL4/KT COL3 COL2 COL1 XIN XOUT XMUTE VSS HFI 1 2 3 4 5 6 7 8 9 10 20 19 18 17 16 15 14 13 12 11 HDO PO ROW4 ROW3 ROW2 ROW1 HKS VDD DTMF HFO
EM91420CK
NC COL5 COL4/KT COL3 COL2 COL1 XIN XOUT XMUTE VSS HFI 1 2 3 4 5 6 7 8 9 10 11 22 21 20 19 18 17 16 15 14 13 12 SDO HDO PO ROW4 ROW3 ROW2 ROW1 HKS VDD DTMF HFO
EM91420DK
NC COL5 COL4/KT COL3 COL2 COL1 XIN XOUT XMUTE VSS HFI DRING 1 2 3 4 5 6 7 8 9 10 11 12 24 23 22 21 20 19 18 17 16 15 14 13 SDO HDO PO ROW4 ROW3 ROW2 ROW1 HKS VDD DTMF HFO RMUTE
Keyboard Arrangement
ROW1 ROW2 ROW3 ROW4
COL1 1 4 7 */T
COL2 2 5 8 0
COL3 3 6 9 #
COL4/KT HD F A RD/P
COL5
ST
* This specification are subject to be changed without notice.
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TONE/PULSE SWITCHABLE DIALER WITH LCD INTERFACE AND DUAL-TONE MELODY GENERATOR
FUNCTIONAL BLOCK DIAGRAM
RMUTE SDO HFO HDO COL1 COL2 COL3 COL4/KT COL5 XMUTE Row/Column programming counter
Keyboard interface (column)
Output circuit
Memory (Melody) XIN XOUT Oscillator
latch & decoder
D/A converter
DTMF
Timing/Control circuit ROW1 ROW2 ROW3 ROW4 VDD HFI HKS DRING VDD Keyboard interface (Row) Input circuit Pulse generator PO
PIN DESCRIPTIONS
Symbol ROW1~ROW4 Function Keyboard scan pins of row group. In idle state (HKS is "High" and HFO is "Low"), these pins stay "High impedance" level to prevent power consumption. Otherwise, these pins switch to "High" level for detecting keyboard entry. These pins will output 600 Hz signal while keyboard is scanning. Keyboard scan pins of column group. In idle state, these pins stay "High impedance" level. Otherwise these pins switch to "Low" level for detecting keyboard entry. These pins will output 600 Hz signal while keyboard is scanning. The fourth column group pin of the keyboard that also provides the keytone output . Normally, this pin stays "Low" level for detecting keyboard entry. After a valid keyboard entry, this pin will output keying confirmation tone that is 600 Hz signal and 30 ms duration. To prevent signal interference, while DTMF issue, it will disable key tone output except function key. Oscillator input and output pins. A 3.579545 MHz crystal or ceramic resonator must be crossed connection to XIN and XOUT pins which generate system clock. The Tone/Pulse MUTE signal output pin that is NMOS open-drain output structure. This pin will switch to "Low" level during Tone/Pulse dialing and hold function . Otherwise, this pin stays "High impedance" level. Positive and negative power supply input pins. Recommended operating voltage from 2.0Vdc to 5.5Vdc. Handfree inputs pin which accepts falling edge signal to turn "on" or turn "off" handfree function. This pin is hysteresis input structure and built-in pull up resistor (typically 200 Kohms). Handfree outputs pin that is designed to control telephone line for on-hook dialing or control speakerphone circuit for handfree conversation. When handfree function is executed, this pin will switch to"High". Otherwise, this pin stays "Low" level. The DTMF (Dual Tone Multi-Frequency) and music signals output pin. Normally, this pin stays "Low" level. In Tone dialing mode, this pin will output DTMF signal that is corresponding to keyboard 0 .. 9, * and # keys. Beside this, in the line hold duration, this pin will issue dual-tone music for telephone line.
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COL1~COL3 and COL5
COL4/KT
XIN and XOUT XMUTE
VDD and VSS HFI
HFO
DTMF
* This specification are subject to be changed without notice.
EM91420 SERIES
TONE/PULSE SWITCHABLE DIALER WITH LCD INTERFACE AND DUAL-TONE MELODY GENERATOR
Symbol HKS
Function Control signal inputs pin that is corresponding hook switch status. When handset was left from cradle, this pin must be connected to "Low" level to operate all functions. Otherwise, this pin must be connected to "High" level to disable all function and prevent power consumption. Pulse signal outputs pin that is NMOS open-drain output structure. Normally, this pin stays "High impedance" level. In Pulse dialing mode and keypad was entry. This pin will output pulse trains signal that is corresponding to keyboard 0 .. 9 keys. Hold function output that is CMOS structure.Normally, this pin stays "Low" level. When Hold function is executing, this pin will output "High" level. This pin is designed to drive LED or peripheral circuit to indicate line is at Hold status. SDO function output that is NMOS open-drain structure. When there is a valid entry on keyboard, this pin will output a serial data. This serial data is designed to drive LCD driver to display dialing number on LCD screen or drive voice synthesizer to announce dialing number to speaker. The ring signal detect input pin which is internal pull up (built-in 100 Kohms resistor). While the Tel-ring is incoming, this pin must be connected to "Low" with delay to indicate the ringing . Otherwise, this pin must be connected to "High" level . Ring mute output pin that is NMOS open-drain structure. The RMUTE pin is designed to control microphone of handset to prevent the illegal dialing from pocket dialer. If the DRING pin is at "High" level , then Off-Hook or turn on Handfree , this pin will output "Low" level. In other words, the DRING pin is used to check the phone that receives an incoming call (DRING =Low input) or make an outgoing call (DRING= High input) . If the phone user make an outgoing call ,then RMUTE pin activated to prevent the illegal dialing from pocket dialer in the particular application.The RMUTE can be restored to "High" level when the first key entry is not the optioned lock-number . No connection.
PO
HDO
SDO
DRING
RMUTE
NC
* This specification are subject to be changed without notice.
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FUNCTION DESCRIPTIONS Dialing signal selection
The EM91420 series incorporated a special keyboard scanning function that is connecting a resistor (typically is 560 Kohms) on keyboard scan pin to select many telephone specifications. The specifications are described as following : a. Mode ROW1 Mode R-Vdd 20 PPS NR Tone R-Vss 10 PPS c. Flash time ROW3 ROW4 NR NR NR R-Vss R-Vss NR R-Vss R-Vss e. Lock number COL2 COL3 NR NR NR R-Vss R-Vss NR R-Vss R-Vss b. M/B ratio ROW2 MBR (%) NR 40:60 R-Vss 33:66 d. Lock control method COL1 Control method R-Vdd key lock NR none lock R-Vss password lock
Tf (ms) 600 100 80 300 Lock number none 0 9 0.9
Normal dialing
Directly keying digital key on keyboard which number can be dialing output and stored in LNB memory automatically. Operating procedure described as follow : * To select Pulse or Tone mode. * Off-hook or turn on HF function. * Keying d1, d2, .. , dn. The "d" expressed digital keypad that included 1~9, *, 0, #, P, and PT keys. The "n" expressed unlimited. * The numbers d1, d2, .. , dn will be dialed out in Pulse or Tone mode as selection.
LNB redial memory
Storing: In normal dialing mode, every digital key was entry which number will be stored in LNB memory automatically. If entry digits are more than 32 digits, the redial function of LNB memory will be disabled. Otherwise, these numbers stored in LNB memory can be redial output. * This specification are subject to be changed without notice.
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TONE/PULSE SWITCHABLE DIALER WITH LCD INTERFACE AND DUAL-TONE MELODY GENERATOR
Redialing: After normal dialing, directly keying F key (or On-Off hook once) and keying RD key on keyboard. The numbers that are stored into LNB memory will be dialed output.
Repertory memory
The EM91420 series incorporated several sets repertory memory and each one can store number up to 16 digits. These memories were designed to 20 sets types. As in memory storing, if stored numbers are more than 16 digits that only the previous 16 digits can be stored into specific memory. Otherwise, these numbers can be stored entirely. After memory dialed out, the content of LNB is keeping to current data. Storing of 20 sets memory Indirect (three-touch) operation Off-hook (or turn on HF function), push (ST, d1, d2, .. , dn, ST, n, n.) The numbers d1, d2, .. , dn will be stored into memory location "n n". The "n n" expressed digital number from 01 to 20.
Dialing (after memory dialed out, the content of LNB is keeping to current data) Indirect (three-touch) memory * To select Pulse or Tone mode. * Off-hook (or Turn on HF function), push A, n , n key. The numbers that are stored in indirect memory location "n n" will be dialed out in Pulse or Tone mode as selection . The "n n" expressed digital number from 01 to 20. Pause (P) key operation The Pause (P) key is designed to support pause operation in dialing duration. "P" key can be stored in memory and it will occupy one digital position. * To select Pulse or Tone mode. * Off-hook (or turn on HF function), push (d1, d2, .. , dn, RD/P, k1, k2, .. , kn.) These numbers will be dialed out as following sequence: d1, d2, .. , dn, Tp, k1, k2, .. , kn. Pulse to Tone (*/T) key operation The Pulse to Tone (*/T) key is designed to support toll dialing (long distance call) or PABX system operation. The "*/T" key can be stored in memory and it will occupy one digital position. * To select Pulse mode. * Off-hook (or turn on HF function), push d1, d2, .. , dn, */T, k1, k2, .. , kn. These numbers will be dialed out as following sequence: d1, d2, .. , dn, Tpt, k1, k2, .. , kn. (pulse mode) (tone mode) * This specification are subject to be changed without notice.
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Flash (F) key operation The Flash (F) key is designed to break telephone line temporarily. After F key is depressed, this dialer will send a flash signal to break line 600 ms, 300 ms, 100 ms or 80 ms as ROW3 and ROW4 selection. Handfree (HF) function The handfree function is designed to support on-hook dialing and loudspeaker application which can be turn "on" or "off" with falling edge signal from HFI pin. During handfree function is executed, the HFO pin is switched to "high". Otherwise the HFO pin stays "low" level. One of the following operations can turn off Handfree function (HFO pin return to "Low"). * On-off hook once. * Trigger HFI pin with falling edge signal. * Turn on Hold (HD) function. (HDO pin switched to "High") Hold (HD) function The Hold function is designed to stop conversation temporarily. In off-hook state (or HF function is turned on), to press HD key on the keyboard, the Hold function can be turned "on" (HDO pin switched to "High"). One of the following operations can turn off Hold function (HDO pin switched to "Low"). * On-off hook once. *To press HD key over 280 ms. * Turn on Handfree (HF) function. (HFO pin switched to "High") Special Note: A 300 ms delay time (Tdly) at the first Off-Hook or turn on Handfree that is a special designed to avoid a rapid key entry (dummy number ) in this time duration ,and a long distance call number follows. For example, Off-Hook , "3" ,............ , "0" ,1,2,3...... Dummy key Lock number key The dummy number "3" is not detected by the centered office or PABX ,but the following numbers "0" ,1,2,3... long distance call can be dialed out normally since the leading number "3" is not the Lock-number defined in EM91420 series. To prevent the unavoidable long distance call, then EM91420 inhibits the key entry during Tdly.
* This specification are subject to be changed without notice.
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TONE/PULSE SWITCHABLE DIALER WITH LCD INTERFACE AND DUAL-TONE MELODY GENERATOR
Operating flow chart
HKS=Lo HF HF 4 On-hook Hand-free State 1 On-hook State HKS=Hi 2 Off-hook State HF HF HD HF HD 6 On-hook Hold-line State HD HKS=Hi HKS=Lo 5 Off-hook Hold-line State HD
HKS=Lo
HKS=Hi HD HF
3 Off-hook Hand-free State
: HF = Handfree HD = Hold Truth table Operating state Input/Output pin level HKS PO XMUTE HFO (0) On-hook, idle state H F F L (1) Off-hook line L F F L (2) Off-hook, HF line L F F H (3) On-hook, HF line H F F H (4) Off-hook, HD line L F L L (5) On-hook, HD line H F L L Note : F=floating (high impedance); H=logic "High"; L=logic "Low" level.
HDO L L L L H H
Music on Hold EM91420 series built-in a melody generator to generate dual-tone music on DTMF output pin. The music is designed for telephone line at line holding. SDO (Serial Data Output) function The SDO is serial data output which format is same as UART protocol. SDO function is designed to drive LCD driver and voice synthesizer. So the dialing numbers can be display on LCD screen with EM32100 (or EM32116 ). The SDO signal consists of two start bits, six data bits and two stop bits. Each bit time is about 3.9 ms (256 Hz) and output sequences are following by start bits, data bits (LSB to MSB) and stop bits.
1 bit 0 bit2 bit3 data bits bit4 bit5 0 stop bits 1
ready
0 start bits
bit1
* This specification are subject to be changed without notice.
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TONE/PULSE SWITCHABLE DIALER WITH LCD INTERFACE AND DUAL-TONE MELODY GENERATOR
SDO Keypad Encoded table: Digital key (b5,b4=0,0) keypad 1 2 3 4 5 6 7 output b3,b2,b1,b0 0001 0010 0011 0100 0101 0110 0111 Display 1 2 3 4 5 6 7 Function key (b5,b4=1,0) keypad ST Hold output b3,b2,b1,b0 0000 1000 Display STORE HOLD Function key (b5,b4=1,1) keypad RD output b3,b2,b1,b0 1101 Display RD
8
9
0
"*"/T
#
P
*/"T"
1000 1001 1010 8 9 0
1011 1100

1101 1110 P
HF 1010 Speaker
A 1110 A
F 1111 clear all display
(Lock state) 0001 Lock
: The display of LCD panel "ST","Hold","HF","A","RD" is corresponding to EM32116 with flag types. Keypad,SDO format and LCD display reference table: Keypad 1 2 3 4 5 6 7 8 9 0 "*"/T # P */"T" ST HOLD HF A F (Lock state) RD bit5 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 bit4 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 bit3 0 0 0 0 0 0 0 1 1 1 1 1 1 1 0 1 1 1 1 0 1 bit2 0 0 0 1 1 1 1 0 0 0 0 1 1 1 0 0 0 1 1 0 1 bit1 0 1 1 0 0 1 1 0 0 1 1 0 0 1 0 0 1 1 1 0 0 bit0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 0 0 0 0 1 1 1 Display 1 2 3 4 5 6 7 8 9 0 P STORE HOLD Speaker A clear all display Lock RD
* This specification are subject to be changed without notice.
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TONE/PULSE SWITCHABLE DIALER WITH LCD INTERFACE AND DUAL-TONE MELODY GENERATOR
LOCK function The EM91420 serial provides the LOCK function to inhibit toll dialing operation. Connecting a resistor on COL1 pin to VSS can select different LOCK control method that is conventional key lock or password lock. Also the lock number that can be selected by connecting the resistors on COL2 or COL3 pin. After power on reset, the password is fixed to 000 automatically. The lock function is disabled when the password is equal to 000 . How to setup password * Set LOCK function to password control mode. (Connects a resistor on COL1 pin to VSS) * Off hook (or turn on HF function) * Push : # , # , ops1 , ops2 , ops3 , nps1 , nps2 , nps3 , # . If the ops1~ops3 are the same with current password, then nps1~np3 will be stored in the dialer to replace current password. Otherwise, the current password can not be updated. All the numbers pressed in the password setup procedure can not be dialed out when current password is not equal to 000. If the current password are equal to 000, then only the first number "#" will be dialed out. Normal dialing : Set lock function to none lock mode (without resistor connected to COL1 pin) or set password equal to 000. In this case, the dialer is operated in normal mode and all functions work at unlimitation. Dialing via LOCK function Conventional key lock mode. (Connects a resistor on COL1 pin to VDD) * Off hook (or turn on HF function) * Keying : d1 , d2 , .. , dn . If the first number (d1) is the same with the lock number that optioned in table, then all entry numbers can not be dialed out and keyboard will be inhibited until on to off hook once again. If the first number is not equal to lock number, all the entry numbers will be dialed out. Password control mode. (Connects a resistor on COL1 pin to VSS) * Off hook (or turn on HF function) * Keying : ([ # , ps1 , ps2 , ps3 ] + telephone number.) The numbers in the [ ] symbol could be omitted. The number "#" will be inhibited when the current password is not equal to 000,and ps1 , ps2 , ps3 work at the checking state, not to be dialed out. Other descriptions are as on following : Incorrect password entry. The telephone numbers can not be dialed out. Password is omitted . If the first digit of telephone numbers is the same with the lock number, all of the telephone numbers can not be dialed out and keyboard will be inhibited until On to Off hook once again. If the first digit is not equal to the lock number then the telephone numbers will be dialed out entirely. Correct password entry. The telephone numbers can be dial out no matter what lock number is.
Ring detector
The Ring detector is designed to prevent illegal dialing from pocket dialer. Following the procedures ( i,ii,iii ), this dialer will detect DRING pin to control RMUTE output level. If DRING is detected a "Low" level, the RMUTE stays "High impedance". If DRING is detected a "High" level, the RMUTE will output "Low" until keyboard entry. In actual application of the RMUTE pin is recommended connection to microphone of the * This specification are subject to be changed without notice.
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TONE/PULSE SWITCHABLE DIALER WITH LCD INTERFACE AND DUAL-TONE MELODY GENERATOR
phone handset to prevent that the dialing signal (DTMF) is coupling by the Microphone of the phone handset. (such as pocket dialer) i. In idle state, HKS is from "High" to "Low" (pick up handset action). ii. In idle state, turn on handfree function. iii. The flash operation ( F key ).
ABSOLUTE MAXIMUM RATINGS(Ambient temperature is 25 C, all voltages referenced to VSS)
Items Power supply voltage Input voltage range Operating temperature Storage temperature Power consumption Sym. VDD VIN TOPR TSTO PD Rating 6.0 Vdc VSS-0.3V ~ VDD+0.3V 0 ~ +50 -55 ~ 125 500 Unit V V C C mW
ELECTRICAL CHARACTERISTICS
(Ambient temperature is 25 C, VDD=2.5V unless otherwise noted, all voltages referenced to VSS, Fosc=3.579545 MHz)
Parameter Operating voltage Operating current(HKS=0) Pulse Tone Pulse Tone Pulse Tone HKS=1 HKS=0 HKS=1 HKS=0
Sym.
Min. 2.0 2.0 -
Typ.
Max. Unit
Condition unload unload with pull up/down resistor * 8 HKS=1,Vdd=1V unload with pull up/down resistor * 8
Idd
Memory retention current Standby current
Imrt Istby
HKS, HFI & DRING pins: input voltage HFO & HDO pins source current PO, HFO, XMUTE, RMUTE & SDO pins: sink current PO, XMUTE, RMUTE and SDO pins: leakage current HFI pin input resistance DRING pin input resistance Keyboard scanning pins output current (except COL4/KT) COL4/KT source current sink current
ViH ViL IoH IoL IoH Rhfi Rdring IoH IoL IoH IoL
5.5 V 5.5 0.15 0.3 0.3 0.5 mA 0.15 0.3 0.3 0.5 0.001 0.1 uA 0.001 0.1 1 10 uA -0.001 0.1 10 30 0.8Vdd Vdd V Vss 0.2Vdd 0.2 mA -0.2 mA 2 200 0.2 0.2 200 100 10 400 0.001 uA 50 800 K K uA V mA
Vo = 2.0 V Vo = 0.5 V Vo = Vdd Vhfi = Vss Vdeing=Vss Vksn=Vss ksn=Vdd Vo=2.0V Vo=0.5V
* This specification are subject to be changed without notice.
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TONE/PULSE SWITCHABLE DIALER WITH LCD INTERFACE AND DUAL-TONE MELODY GENERATOR
ELECTRICAL CHARACTERISTIC
(Ambient temperature is 25C, VDD=2.5V unless otherwise noted, all voltages referenced to Vss,Fosc=3.579545 MHz)
Parameter Keyboard debounce time Key tone signal: frequency duration Pause time Pulse to Tone waiting time Flash time

Sym. Tdb Fkt Tkt Tp Tpt Tf
Min. -0.2 0.5 142 1 5 96 96
Typ. 20 600 30 3.6 3.6 600 100 80 300 20 10 40:60 33:66 800 500 160 2 -30 98 98 (-23.3) 53 (-25.3) 42 280 3.9 300

Max. Unit ms
Condition
Pulse rate Make/Break ratio Inter-digit pause time DTMF pin: sink current DTMF signal DC level DTMF signal: ac level pre-emphase distortion load resistance Minimum tone duration Minimum inter-tone pause Melody output signal: main tone ac level Sub-tone HD key release hold function debounce time SDO every bit time Off-Hook delay time

PSR MBR Tidp IoL Vdc Vdtmf Twist THD ZL Tp Titp
Hz ms sec. sec. Row3B, Row4B=NR, NR ms Row3B, Row4B=NR, R-Vss Row3B,Row4B=R-Vss, NR Row3B,Row4B=R-Vss,R-Vss pps Row1 = R-Vdd Row1 = R-Vss % Row2 = NR Row2 = R-Vss ms PSR = 10 pps PSR = 20 pps mA Vdtmf = 0.5 V 0.75 Vdd Vdd = 2.0V ~ 5.5V 180 mVrms Row group 3 dB Column - Row -23 dB RL = 5 K K THD < - 23dB 100 100 ms Memory dialing (dBm) mVms Vdd =2.0V ~ 5.5V (dBm) mVms Vdd =2.0V ~ 5.5V ms ms ms

Vmtac Vstac Thdrdb Tbit Tdly

48 37 3.8
58 47 4.1
* This specification are subject to be changed without notice.

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TONE/PULSE SWITCHABLE DIALER WITH LCD INTERFACE AND DUAL-TONE MELODY GENERATOR
DTMF output frequency (fosc = 3.579545 MHz)
Keyboard scan pin ROW1 (f1) ROW2 (f2) ROW3 (f3) ROW4 (f4) COL1 (f5) COL2 (f6) COL3 (f7) CCITT standard (Hz) 697 770 852 941 1209 1336 1477 Actual output (Hz) 699.1 766.2 847.4 947.9 1215.8 1331.6 1471.8 Deviation (%) 0.30 0.49 -0.53 0.73 0.56 -0.32 -0.35
* This specification are subject to be changed without notice.
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TONE/PULSE SWITCHABLE DIALER WITH LCD INTERFACE AND DUAL-TONE MELODY GENERATOR
TIMING DIAGRAM
HKS KEY IN Tdb KT Tkt XMUTE HDO SDO PO Tidp DTMF OSC. Tdly
Hi-impedance
2
3
Tm
T T TT b m bm
Tidp
Figure 1. Pulse mode operating timing
HKS KEY IN KT XMUTE HDO SDO PO DTMF OSC.
Hi-impedance
2 Tdb
3
Td
Titp
Titp
Figure 2. DTMF mode operating timing
* This specification are subject to be changed without notice.
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TONE/PULSE SWITCHABLE DIALER WITH LCD INTERFACE AND DUAL-TONE MELODY GENERATOR
LNB=2,3 HKS KEY IN KT Tkt XMUTE HDO SDO PO DTMF OSC. Tdly
Hi-impedance
RD/P Tdb
Tm Tidp Tidp T T TT b m bm
Figure 3. Pulse mode LNB redial timing
LNB=2,3 HKS KEY IN Tdb KT Tkt XMUTE HDO SDO PO DTMF OSC. Tdly
Hi-impedance
RD/P
Td Titp
Td
Titp
Figure 4. DTMF mode LNB redial timing
* This specification are subject to be changed without notice.
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TONE/PULSE SWITCHABLE DIALER WITH LCD INTERFACE AND DUAL-TONE MELODY GENERATOR
HKS KEY IN KT XMUTE Tp HDO SDO PO DTMF OSC.
Hi-impedance 2 RD/P 3
Tidp
Tidp
Figure 5. Pause key operating timing
HKS KEY IN KT XMUTE HDO SDO PO DTMF OSC.
Hi-impedance
2
*/T
3
4
Tpt
Figure 6. Pulse to Tone (PT) operating timing
HKS KEY IN KT XMUTE HDO SDO PO Tf DTMF OSC.
Hi-impedance
F Tdb
Tfp=300ms
Figure 7. Flash key operating timing * This specification are subject to be changed without notice.
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TONE/PULSE SWITCHABLE DIALER WITH LCD INTERFACE AND DUAL-TONE MELODY GENERATOR
HKS KEY IN Tdb KT SDO
sT sT b0 b1 b2 b3 b4 b5 spT spT
2
0
1
0 L
1
Tbit 00
00 M
0
1
Hi-impedance
L=LSB,M=MSB, sT=START bit time, spT=STOP bit time Figure 8. SDO operating timing
HKS KEY IN HFO HDO XMUTE SDO PO HF HD HF HD HD HD HF HD HD @ 280 ms Thdrdb
MELODY Hi-impedance
@ : It can be triggled by extension telephone set for hold function release Figure 9. HF and HD operating timing
HFI or HKS KEY
HF
5
0
KT Tdly OSC. "0" digit dialing time Hi-impedance
Figure 10. Off-Hook delay time * This specification are subject to be changed without notice.
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TONE/PULSE SWITCHABLE DIALER WITH LCD INTERFACE AND DUAL-TONE MELODY GENERATOR
Toff RING Ton DRING HKS RMUTE
Figure 11. Timing of receiving an incoming call * The external ring detection circuit must send a low signal at the total ring cycle (Ton and Toff)
RING DRING HKS RMUTE
Figure 12. Timing of making an outgoing call
* This specification are subject to be changed without notice.
10.1.1997
18
SW1B 4 HANDFREE HANDSET 5 6 D6 2 2K7 R33 2 CE 1K5 2 3 1 2 C31 3 HDO JP10 1N4148 R67 50 C23 47U D5 R68 2 100K HDO R57 22K 1N4148 C22 1uF COL4/KT 47K R45 47K .1uF R44 Q9 C945 1 C21 10K 3 2 1 47K 1N4148 D19 2 1 1 3 R43 R46 2 Q10 C945 AUDIO POWER AMPLIFER R65 220K ROW1 1 C24 220uF 5V1 C17 .01U .1u D13 3 R37 C25 .1U R69 47K 100K 1 Q4 C945 2 Q19 1815 1N4148 1 D18 2 JP9 EM32100 47K 1 HFO 1D17 3 Q14 C945 Q18 1815 1N4148 2 EM32100 R56 2 R36 470K 1D16 2 1 R55 470K R49 1N4148 C16 .001U HOOK
TIP 1 R48 100K D7 1N4148 R52 220K
R54
SW1A 1
10M ONHOOK
2
470
3
OFFHOOK
1
3
R47
2
Q6 A92
BRIDGE
APPLICATION CIRCUIT
RING
220K
1 D14 1N4148
2
.1U
R35 2K2
Q7
EM91420 series Application circuit
3
27V
2 A42
1
BRIDGE
24
23
22
21
20
19
18
17
16
15
14
1 560K
4
13
SDO
HKS
HDO
ROW4
ROW3
ROW2
ROW1
DTMF
2 JUMPER 560k
3
JUMPER
RMUTE
PC817
VDD
HFO
1U
560K SDO
PO
NC
COL5
COL4/KT
COL3
COL2
COL1
XIN
XOUT
XMUTE
VSS
HFI
1
2
3
4
5
6
7
8
9
10
11
4 8 0 # RD/P ST 9 A
5
6
F
12
DRING
* This specification are subject to be changed without notice.
560K 560K JUMPER CE 2 TO 4 LINE VCC SPEECH LCD DRIVER 1.5V NETWORK
VDD
22U/50V
4K7
DRING
VDD
EM91420DK
1
2
3
HD
DRING
7
*/T
3.58MHz 10p 560k 560k BUZZER 10p
HF
560k
EM91420 SERIES
TONE/PULSE SWITCHABLE DIALER WITH LCD INTERFACE AND DUAL-TONE MELODY GENERATOR
10.1.1997
19
8/10 Digits LCD Pannel
36 35 34 33 32 31 30 29 28 27 26 25
EM32100 Application Circuit :
220k 220k 3 2 2 DIODE 1 2 DIODE 1 DIODE 2 1 20p 32768Hz 20p 47k 2 3 C945 1 1.5V 1 C945 100k
SDO
HKS
HDO
VSS
HFO
1 2 3 4 5 6 7 8 9 10 11 12
VDD 200k
MS1 MS2 SD1 HKS VDD XIN NC XOUT VSS 24/12 ENRTC NC
* This specification are subject to be changed without notice.
SEG6 SEG7 SEG8 SEG9 NC SEG10 SEG11 SEG12 SEG13 SEG14 SEG15 SEG16
Package type : QFP 48 pins or chip form provided
EM32100
1 100k
2
3
37 38 39 40 41 42 43 44 45 46 47 48 SEG5 SEG4 SEG3 SEG2 SEG1 COM1 COM2 COM3 TEST2 TEST1 F32H NC
SEG17 SEG18 SEG19 SEG20 SEG21 SEG22 SEG23 SEG24 VEE VN VP NC
24 23 22 21 20 19 18 17 16 15 14 13 .1 .1
VCC
EM91420 SERIES
TONE/PULSE SWITCHABLE DIALER WITH LCD INTERFACE AND DUAL-TONE MELODY GENERATOR
10.1.1997
20
COM3 COM2 COM1 SEG31 SEG30 SEG29 SEG28 SEG27 SEG26 SEG25 SEG24 SEG23 SEG22 SEG21 SEG20 SEG19 SEG18 SEG17 SEG16 SEG15 SEG14 SEG13 SEG12 SEG11 SEG10 SEG9 SEG8 SEG7 SEG6 SEG5 SEG4 SEG3 SEG2 SEG1 SEG0
SEG25 SEG24 SEG23 SEG22 SEG21 SEG20 SEG19 SEG18 SEG17 SEG16 SEG15 SEG14 SEG13 SEG12 SEG11 SEG10
* This specification are subject to be changed without notice. Package type : QFP 64 pins or chip form provided
Hook Switch detection circuit LINE
EM32116 Application Circuit :
TONE/PULSE SWITCHABLE DIALER WITH LCD INTERFACE AND DUAL-TONE MELODY GENERATOR
EM91420 SERIES
10.1.1997
LCD110
21
2 1 3 SW HOOK 100k 3 .1 C945 1 24/12 ENRTC ENCLND COM3 COM2 COM1 SEG31 SEG30 SEG29 SEG28 SEG27 SEG26 2 VDD .1F
SDI
VDD
470k ON OFF OFF OFF 32768Kz .1F .1F 1 2 3 ON 1 2 3 ON HOUR 1 2 3 20p 20p CALENDAR RTC
EM32116
TEST2 BATCKOF BATLOW SEG0 SEG1 SEG2 SEG3 SEG4 SEG5 SRG6 SEG7 SEG8 SEG9
.1F
XOUT XIN VSS VC2 VC1 V3 V2 VDD HKS SDI MS2 MS1 F32HZ TEST1
VDD
1.5V
EM91420 SERIES
TONE/PULSE SWITCHABLE DIALER WITH LCD INTERFACE AND DUAL-TONE MELODY GENERATOR
PACKAGE INFORMATION
Example : EM (1) 914XX P (2) (3) (1) ELAN MICRO. pefix (2) Type number (3) Package code: PPDIP KSkinny RSDIP 18/20/28 Lead Plastic Package
E1
1
E
D
A
A1 L
C B eB e B1
18 PDIP
DIM A A1 B B1 C D E E1 e eB L MILIMETERS MIN. MAX. 5.334 0.381 0.356 0.558 1.150 1.778 0.204 0.381 22.35 23.37 7.620 8.255 6.096 7.112 2.286 2.794 10.92 2.921 4.064
20 PDIP
INCHES MILIMETERS INCHES MIN. MAX. DIM MIN. MAX. MIN. MAX. .210 A 5.334 .210 .015 A1 0.381 .015 .014 .022 B 0.356 0.558 .014 .022 .045 .070 B1 1.150 1.778 .045 .070 .008 .015 C 0.204 0.381 .008 .015 .880 .920 D 25.40 26.67 1.000 1.050 .300 .325 E 7.620 8.255 .300 .325 .240 .280 E1 6.096 7.112 .240 .280 .090 .110 e 2.286 2.794 .090 .110 .430 eB 10.92 .430 .115 .160 L 2.921 4.064 .115 .160 MILIMETERS DIM MIN. MAX. A 6.350 A1 0.381 B 0.356 0.558 B1 1.016 1.778 C 0.204 0.381 D 35.56 37.85 E 15.24 15.88 E1 13.21 14.73 e 2.286 2.794 eB 17.78 L 2.921 5.080
28 PDIP
INCHES MIN. MAX. .250 .015 .014 .022 .040 .070 .008 .015 1.400 1.490 .600 .625 .520 .580 .090 .110 .700 .115 .200
* This specification are subject to be changed without notice.
10.1.1997
22
EM91420 SERIES
TONE/PULSE SWITCHABLE DIALER WITH LCD INTERFACE AND DUAL-TONE MELODY GENERATOR
22/24 Lead Plastic Package-Skinny
E1
1
E
D
A
A1 L
C B eB e B1
22 PDIP (skinny)
DIM A A1 B B1 C D E E1 e eB L MILIMETERS MIN. MAX. 4.752 0.381 0.356 0.558 1.27 1.778 0.204 3.556 25.90 26.67 7.620 8.255 6.223 6.604 2.286 2.794 8.382 10.16 2.921 4.064 INCHES MIN. MAX. .180 .015 .014 .022 .050 .070 .008 .014 1.02 1.05 .300 .325 .245 .260 .090 .110 .330 .400 .115 .160 DIM A A1 B B1 C D E E1 e eB L
24 PDIP (skinny)
MILIMETERS MIN. MAX. 4.572 0.381 0.356 0.558 1.27 1.778 0.204 0.381 31.24 32.26 7.620 8.255 6.223 6.731 2.286 2.794 8.636 9.652 2.921 4.064 INCHES MIN. MAX. .180 .015 .014 .022 .050 .070 .008 .015 1.23 1.270 .300 .325 .245 .265 .090 .110 .340 .380 .115 .160
* This specification are subject to be changed without notice.
10.1.1997
23
EM91420 SERIES
TONE/PULSE SWITCHABLE DIALER WITH LCD INTERFACE AND DUAL-TONE MELODY GENERATOR
42 SDIP Package
E1
E
D
A A2 C A1 L
D1 B eB e B1
42 SDIP
DIM A A1 A2 B B1 C D E1 e eB D1 L MILIMETERS MIN. MAX. 5.08 0.381 3.937 4.191 0.356 0.559 0.914 1.116 0.204 0.304 36.70 37.34 13.84 14.10 1.727 1.829 15.24 17.78 0 0.127 2.921 3.429 INCHES MIN. MAX. 0.200 0.015 0.155 0.165 0.014 0.022 0.036 0.044 0.008 0.012 1.445 1.470 0.545 0.555 0.068 0.072 0.600 0.70 0 0.005 0.115 0.135
* This specification are subject to be changed without notice.
10.1.1997
24

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