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MOTOROLA
SEMICONDUCTOR TECHNICAL DATA
Order this document by MC145444/D
MC145444
Advance Information Single-Chip 300-Baud Modem
MC145444 is a silicon gate CMOS frequency shift keying (FSK) modem intended for use with telemeter systems or remote control systems over the telephone network. This device is compatible with CCITT V.21 and contains the entire circuit that provides a full-duplex or half-duplex 300-baud data communication over a pair of telephone lines. This device also includes the DTMF generator and call progress tone detector (CPTD). The differential line driver has the capability of driving 0 dBm into a 600 load with a single + 5 V power supply. The transmit level is controlled by the programmable attenuator in 1 dB steps. Devices functions are controlled through a 3-wire serial interface. * * * * * * * * * Capable of Driving 0 dBm into a 600 Load DTMF Generator On-Chip Imprecise Call Progress Detector On-Chip A Transmit Attenuator Programmable in 1 dB Steps 3-Wire Serial Interface Compatible with CCITT V.21 2100 Hz Answer Tone Generator On-Chip Analog Loopback Configuration for Self Test Simplex, Half-Duplex, and Full-Duplex Operation
1
20
H SUFFIX PLASTIC DIP CASE 804
20
DW SUFFIX SOG PACKAGE CASE 751D
1
ORDERING INFORMATION
MC145444P Plastic DIP MC145444DW SOG Package
PIN ASSIGNMENT
RxBO FTLC GNDA CDA GND TLA X1 X2 SD RxD 1 2 3 4 5 6 7 8 9 10 20 19 18 17 16 15 14 13 12 11 RxGC RxA TxA1 TxA2 DSI VCC ENB SCK DATA TxD
This document contains information on a new product. Specifications and information herein are subject to change without notice. REV 0 8/95
(c) Motorola, Inc. 1995 MOTOROLA
MC145444 1
BLOCK DIAGRAM
RxBO RxA
+ - 65 k
ANTI-ALIAS FILTER
FTLC S/H MUX LOW-BAND BPF MUX AC AMP FSK DEMODULATOR CARRIER/CPT DETECTOR RxD
RxGC 30 k MUX TxD FSK MODULATOR DSI TLA LEVEL CONTROL DTMF GENERATOR CONTROL LOGIC -1 ENB DATA SCK 15-BIT LATCH 15-BIT SHIFT REGISTER POWER-ON RESET CLOCK GENERATOR ANALOG GROUND GENERATOR TxA2 Rf SMOOTHING FILTER R _ + 20 k TxA1 HIGH-BAND BPF MUX/ MIXING SD CDA
X1
X2
GNDA
GND
VCC
MAXIMUM RATINGS* (Voltages Referenced to VSS)
Rating DC Supply Voltage DC Input Voltage DC Output Voltage Clamp Diode Current per Pin DC Current per Pin Power Dissipation Storage Temperature Range Symbol VCC Vin Vout IIK, IOK Iout PD Tstg Value - 0.5 to + 7.0 - 0.5 to VCC + 0.5 - 0.5 to VCC + 0.5 20 25 500 - 65 to + 150 Unit V V V mA mA mW C
RECOMMENDED OPERATING CONDITIONS
Parameter DC Supply Voltage DC Input Voltage DC Output Voltage Input Rise Time Input Fall Time Crystal Frequency Operating Temperature Range Symbol VCC Vin Vout tr tf fosc TA Min 4.5 0 0 0 0 -- - 20 Typ 5 -- -- -- -- 3.579545 25 Max 5.5 VCC VCC 500 500 -- 70 Unit V V V ns ns MHz C
MC145444 2
MOTOROLA
DC ELECTRICAL CHARACTERISTICS (VCC = + 5.0 V 10%, TA = - 20 to + 70C)
Characteristic Input Voltage H Level L Level Output Voltage H Level L Level Input Current DATA, SCK, E, TxD Quiescent Supply Current Power-Down Supply Current Symbol VIH VIL VOH VOL Iin ICC ICC ICC IOH = 20 A IOL = 20 A IOL = 2 mA Vin = VCC or GND FSK Mode Power-Down Mode 1 Power-Down Mode 2 Conditions Min 3.15 -- VCC - 0.1 -- -- -- -- -- -- Typ -- -- VCC - 0.01 0.01 -- 1.0 8 -- -- Max -- 1.1 -- 0.1 0.4 10.0 -- 300 1 A mA A A V Unit V
TRANSMIT CARRIER CHARACTERISTICS (VCC = + 5.0 V 10%, TA = - 20 to + 70C)
Characteristic Carrier Frequency Channel 1 Mark ``1'' Space ``0'' Carrier Frequency Channel 2 Mark ``1'' Space ``0'' Answer Tone Transmit Carrier Level Second Harmonic Energy Out-of-Band Energy * VTXA1 - VTXA2, RL = 1.2 k Symbol f1M f1S f2M f2S fans VO* V2h* VOE* Attenuator = 0 dB RTLA = Crystal Frequency C lF 3.579545 MHz Conditions Min 974 1174 1644 1844 2094 -- -- Typ 980 1180 1650 1850 2100 6 - 46 Figure 1 Max 986 1186 1656 1856 2106 -- -- dBm dBm dBm Unit Hz
TRANSMIT ATTENUATOR CHARACTERISTICS (VCC = + 5.0 V 10%, TA = - 20 to + 70C)
Characteristic Attenuator Range Attenuator Accuracy Symbol ARNG AACC Conditions Min 0 - 0.5 Typ -- -- Max 15 + 0.5 Unit dB dB
RECEIVER CHARACTERISTICS (Includes Hybrid, Demodulator and Carrier Detector)
(VCC = + 5.0 V 10%, TA = - 20 to + 70C) Characteristic Input Impedance Receiver Carrier Amplitude Carrier Detect Threshold Hysterisis (VCDON - VCCDOF) Carrier Detect Timing OFF to ON TCDON OFF to ON ON to OFF Symbol RIRX VIRX VCDON VCDOF HVS CD1 = 0, CD0 = 0 CD1 = 0, CD0 = 1 CD1 = 0, CD1 = 1 CD1 = 1, CD0 = 1 ON to OFF TCDOFF CD1 = 0, CD0 = 0 CD1 = 0, CD0 = 1 CD1 = 0, CD0 = 1 CD1 = 1, CD0 = 1 CDA = 1.2 V fin = 1.0 kHz 10 i Conditions RxA Pin (Pin 19) Min 50 - 48 -- -- 2 -- -- -- -- -- -- -- -- Typ -- -- - 44 - 47 -- 450 15 15 80 30 30 15 10 Max -- - 12 -- -- -- -- -- -- -- -- -- -- -- dB ms Unit k dBm dBm
MOTOROLA
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BAND-PASS FILTER CHARACTERISTICS (RxA to FTLC) (VCC = + 5.0 V 10%, TA = - 20 to + 70C)
Characteristic FTLC Output Impedance Adjacent Channel Rejection Pass-Band Gain Group Delay Symbol ROFT REJ GPAS Low-Band Filter 930 - 1230 Hz High-Band Filter 1600 - 1900 Hz VRXA = - 12 dBm Conditions Min 10 -- -- -- -- Typ -- 50 10 700 800 Max 50 -- -- -- -- Unit k dB dB s
DTMF CHARACTERISTICS (VCC = + 5.0 V 10%, TA = - 20 to + 70C)
Characteristic Tone Output Level Low Group High Group High Group Pre Emphasis DTMF Distortion DTMF Frequency Variation Out-of-Band Energy Setup Time * VTXA1 - VTXA2, RL = 1.2 k Symbol Vfl* Vfh* PE DIST fV VOE* tosc -- Attenuator = 0 dB RTLA = Crystal Frequency 3.579545 MHz Conditions Min -- -- 0 -- -1 Typ 3 4 -- 5 -- Figure 1 4 -- Max -- -- 3 -- 1 dB % % dB ms Unit dBm
CPTD CHARACTERISTICS (VCC = + 5.0 V 10%, TA = - 20 to + 70C)
Characteristic Band-Pass Filter Center Frequency Band-Pass Filter - 3 dB Band Width Tone Detect Level OFF to ON ON to OFF Tone Detect Timing OFF to ON ON to OFF Symbol fc BW VTDON VTDOF TTDON TTDOF CDA = 1 2 V 1.2 fin = 400 Hz Conditions Min -- -- -- -- -- -- Typ 400 140 - 44 - 47 10 25 Max -- -- -- -- -- -- ms Unit Hz Hz dBm
DEMODULATOR CHARACTERISTICS (VCC = + 5.0 V 10%, TA = - 20 to + 70C)
Characteristic Bit Bias Bit Error Rate Symbol ID BER Conditions Input Level = - 24 dBm Input Level = - 24 dBm CCITT Line Simulation 511 Bit Pattern S/N = 5 dB Min -- -- Typ 5 0.00001 Max -- -- Unit % --
SWITCHING CHARACTERISTICS (VCC = + 5.0 V 10%, TA = - 20 to + 70C)
Characteristic Setup Times DATA to SCK SCK to ENB Hold Time Recovery Time Input Rise Time Input Fall Time Input Pulse Width ENB, SCK SCK to DATA ENB to SCK th trec tr tf tw Symbol tsu Conditions Min 50 50 50 50 -- -- 50 Typ -- -- -- -- -- -- -- Max -- -- -- -- 2 2 -- Unit ns ns ns ns s s ns
MC145444 4
MOTOROLA
0 0
3.4 k 4 k
16 k
256 k
f (Hz)
DATA 50% tsu SCK th LAST CLK tsu ENB 50% PREVIOUS DATA LATCHED 50% FIRST CLK trec
-- VCC -- GND -- VCC -- GND -- VCC -- GND
- 25
- 15 dB/OCT.
- 55 ENB
tr 50% 50%
tf -- VCC -- GND
Figure 1. Out-of-Band Energy
Figure 2. Switching Characteristics ENB Enable Input (Pin 14) Data is loaded into the 15-bit shift register when this pin is at a logic low. When this pin transitions from a logic high to low, the data is transferred to the internal latch on the falling edge of ENB. New data loaded into the shift register will not affect the device operation until this pin transitions from high to low. (See Figure 2.) TxD Transmit Data Input (Pin 11) This pin is the transmit data input, The mark frequency is generated when this pin is at the logic high level. The space frequency is generated when the pin is at a logic low. RxD Receive Data Output (Pin 10) This pin is the receive data output. A high logic level of this pin indicates that the mark carrier frequency has been received, and a low logic level indicates the space carrier frequency has been received. SD Carrier/Call Progress Tone Detect (Pin 9) This pin is the output from the carrier detector or call progress tone detector. This pin works as a carrier detector in the FSK mode and as the call progress tone detector in the CPTD mode. The output goes to a logic low level when the input signal reaches the minimum threshold of the detect level that is adjusted by the CDA voltage. When SD = H, the receive data output (RxD) is clamped high to avoid errors that may occur with loop noise. The SD pin is also clamped high in the other modes except during the power-down mode. TxA1 Non-Inverting Transmit Analog Carrier Output (Pin 18) This pin is the line driver non-inverting output of the FSK and tone transmit analog signals. A + 6 dBm (max) differential output voltage can be obtained by connecting a 1.2 k load resistor between Tx1 and Tx2. Attention must be set so as not to exceed this level when an external input is added to the DSI pin. A telephone line (600 ) is driven through an external 600 resistor. In this case, the output level becomes about half of differential output.
PIN DESCRIPTION
VCC Positive Power Supply (Pin 15) This pin is normally tied to the + 5.0 V. A 0.1 F decoupling capacitor should be used. GND Ground Pin (Pin 5) This pin is normally tied to 0 V. GNDA Analog Ground (Pin 3) Analog ground is internally biased to (VCC - VSS) / 2. It should be tied to ground through a 0.1 F and 100 F capacitor. X1 Crystal Oscillator Output (Pin 7) Connecting a 3.579545 MHz 0.1% crystal between X1 and X2 will cause the transmit frequencies to be within 64 MHz of nominal. X1 is capable of driving several CMOS gates. An external clock may be applied to X2. X1 should then be left open. X2 Crystal Oscillator Input (Pin 8) Refer to X1. SCK Shift Resister Clock Input (Pin 13) This pin is the clock input for the 15-bit shift register. Serial data is loaded into the shift register on the rising edge of this clock. DATA Serial Data Input (Pin 12) This pin is the 15-bit serial data input. This data determines the mode, DTMF signal, transmit attenuation, carrier detect time, channel, and transmit squelch.
MOTOROLA
MC145444 5
TxA2 Inverting Transmit Analog Carrier Output (Pin 17) This pin is the line driver inverting output. The signal is equal in magnitude, but 180 out of phase with the TxA1 (refer to TxA1). RxA Receive Signal Input (Pin 19) This pin is the receive signal input. The pin has an input impedance of 50 k (min). RxGC Receive Gain Adjust (Pin 20) This pin is used to adjust the receive buffer gain. To adjust the gain, the signal from the RxBO through a divider is added as a feedback. This pin may be held open when the gain adjustment is not needed. RxBO Receiver Buffer Output (Pin 1) This pin is the receive buffer output. DSI Driver Summing Input (Pin 16) This pin is the inverting input of the line driver. An external signal is transmitted through an external series resistor RDSI. The differential gain GDSI = (VTXA1 - VTXA2)/VDSI is determined by the following equation. GDSI = - 2Rf / RDSI, Rf 20 k DSI should be left open when not used. CDA Carrier Detect Level/CPTD Level Control (Pin 4) The carrier/call progress tone detect level is programmed with a CDA pin voltage. When this pin is held open, the CDA voltage is set to 1.2 V with an internal divider. The detect level is set at - 44 dBm (typ) for off to on, and - 47 dBm (typ) for on to off. The minimum hysteresis is 2 dB. This pin has a very high input impedance so it should be connected to GND with a 0.1 F capacitor to keep it well regulated. An external voltage may be applied to this pin to adjust the carrier detect threshold. The following equations may be used to find the CDA voltage required for a given threshold voltage. VCDA = 245 x Von VCDA = 347 x Voff FTLC Filter Test (Pin 2) This pin is a high-impedance filter output. It may be used to check the receive filter. This pin also may be used as a demodulator input. In normal operation, this pin is connected to the GNDA through a 0.1 F bypass capacitor. This pin handles very small signals so care must be used with the capacitor's wiring. TLA Transmit Carrier Level Adjust (Pin 6) This pin is used to adjust the transmit carrier level that is determined by the value of the resistor (RTLA) connected
between this pin and GND. The maximum transmit level is obtained when this pin is connected to GND (RTLA = 0).
SERIAL INTERFACE
The following six functions are set up with the 15-bit serial data.
FUNCTION MODE TRANSMIT ATTENUATOR TRANSMIT SQUELCH TONE FREQUENCY CHANNEL CARRIER DETECT TIME : : : : : : M2 A3 SQ T3 CH CD1 CD0 T2 T1 T0 M1 A2 M0 A1 A0
Figure 3 presents the 15-bit serial data timing, starting with the carrier detect time, CD1, followed by the channel, the tone frequency, the transmit squelch, the transmit attenuator, and the function mode. This data is loaded into the internal shift register at the rising edge of the SCK signal and latched at the falling edge of the ENB signal. FUNCTION MODE Modes are selected from the following 3-bit data (M2 - M0, see Table 1). Table 1. Function Mode Truth Table
M2 0 0 0 0 1 1 1 1 M1 0 0 1 1 0 0 1 1 M0 0 1 0 1 0 1 0 1 Function Mode FSK Analog Loopback CPTD Answer Tone DTMF Single Tone Power-Down 1 Power-Down 2
The following paragraphs describe each function. Table 2 presents each output status. FSK Mode The transmitter and the receiver work as a FSK modulator/demodulator. The SD pin output is the carrier's detect signal. Analog Loopback Mode TxA1 connects to the receiver internally and FSK signals are demodulated. The frequency of the receiver is set up with the same frequency as the transmitter. The SD pin output is the carrier detect signal. An IC self test is supported with this function. CPTD Mode The receiver detects a 400 Hz call progress tone. The detect signal comes from the SD pin. The transmitter is disabled.
MC145444 6
MOTOROLA
DATA
CD1
CD0
CH
T3
T2
T1
T0
SQ
A3
A2
A1
A0
M2
M1
M0
SCK
E
Figure 3. Serial Data Timing
Table 2. Output Status
Output Function M d F i Mode FSK Analog Loopback CPTD Answer Tone DTMF Single Tone Power-Down 1, 2 RxD Received Digital Data H H H H High-Z SD Carrier Detect CPTD H H H High-Z TxA1, TxA2 FSK
VCC/2 Answer Tone DTMF Tone Single Tone High-Z
Answer Tone Mode The transmitter works as 2100 Hz answer tone generator. The receiver is disabled. DTMF Mode The transmitter works as a DTMF tone generator. The receiver is disabled. Single Tone Mode The transmitter output is one of the DTMF eight frequencies. The receiver is disabled. Power-Down Mode 1
Power-Down Mode 2 All circuits including the oscillator stop working and all outputs go to the high impedance state. The supply current decreases to 1.0 A (max). Transmit Attenuator Four-bit serial data (A3 - A0) sets up the analog transmit level in the FSK, answer tone, DTMF, analog loopback, and single tone mode. The range of the transmit attenuator is 0 - 15 dB in 1 dB steps. The external signal (DSI) is not affected by this attenuator. TONE FREQUENCY
Internal circuits except the oscillator are disabled, and all outputs except the X1 pin go to the high impedance state. The supply current decreases to 300 A (max).
The DTMF tones or the single tone mode is selected by the 4-bit serial data (T3 - T0).
MOTOROLA
MC145444 7
Table 3. Transmit Attenuator Truth Table
A3 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 A2 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1 A1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 A0 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 Attenuation (dB) 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
Table 4. Tone Frequency Truth Table
Tone Frequency (Hz) DTMF Mode T3 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 T2 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1 T1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 T0 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 Low Group 941 697 697 697 770 770 770 852 852 852 941 941 941 697 770 852 High Group 1633 1209 1336 1477 1209 1336 1477 1209 1336 1477 1336 1209 1477 1633 1633 1633 Keyboard Equivalent D 1 2 3 4 5 6 7 8 9 0 * # A B C Single Si l Tone Mode 941 697 697 697 770 770 770 852 1336 1477 1336 1209 1477 1633 1633 1633
MC145444 8
MOTOROLA
TRANSMIT SQUELCH
Von
The 1-bit serial data (SQ) controls the transmit analog signal. The FSK signal, DTMF tones, single tone, and answer tone are disabled. The external signal to the DSI will be transmitted at that time. The internal line driver works at all times except during the power-down mode.
SQ 1 0 Squelch Enable Disable
Voff
RxA
ton SD
toff
CHANNEL Figure 4. Carrier Detect Timing The transmit and receive channel is set up with a 1-bit serial data (CH) when the function mode is either in FSK or analog loopback. When the function mode is either on the FSK or analog loopback mode, the transmit and receive channel is set up with a 1-bit serial data (CH).
CH 1 0 Channel 1 (Originate) 2 (Answer)
Table 5. Carrier Detect Time Truth Table
Carrier Detect Time (Typ) CD1 0 0 1 1 CD0 0 1 0 1 ton (ms) 450 15 15 80 toff (ms) 30 30 15 10
POWER-ON RESET
CARRIER DETECT TIME The carrier detect time (see Figure 4 and Table 5) is set by 2-bit serial data (CD1, CD0). ton indicates the amount of time the carrier is greater than Von threshold must be present before SD goes low. toff, on the other hand, indicates the amount of delay time SD goes high after the carrier level becomes lower than Voff threshold. When the power is switched on, this device has the following conditions.
Function Mode Transmit Attenuator Transmit Squelch Channel FSK 0 dB Enable 1 (Originate)
MOTOROLA
MC145444 9
100 F
0.1 F GNDA TxA2 600 TxA1 FTLC
600 : 600
10 TIP
*
RING
0.1 F
RxA RxGC CDA RxBO
0.1 F TxD RxD SD I/O PORT DATA SCK ENB 0.1 F X2 VCC +5V GND DIGITAL GROUND MCU
TLA
DSI X1 3.57945 MHz
*
LINE PROTECTION CIRCUIT
ANALOG GROUND
Figure 5. Application Circuit
MC145444 10
MOTOROLA
PACKAGE DIMENSIONS
H SUFFIX PLASTIC DIP CASE 804-01
20
11
B
1 10
-A- C K H G F N D 20 PL 0.25 (0.010)
M
L
NOTES: 1. DIMENSIONING AND TOLERANCING PER ANSI Y14.5M, 1982. 2. DIMENSION B DOES NOT INCLUDE MOLD FLASH. 3. DIMENSION L TO CENTER OF LEADS WHEN FORMED PARALLEL. 4. CONTROLLING DIMENSION: INCH. INCHES MILLIMETERS MIN MAX MIN MAX 0.930 0.970 23.63 24.63 0.240 0.260 6.10 6.60 0.150 0.170 3.81 4.31 0.015 0.022 0.38 0.56 0.050 0.070 1.27 1.78 0.100 BSC 2.54 BSC 0.030 NOM 0.76 NOM 0.009 0.013 0.23 0.33 0.115 0.140 2.93 3.55 0.300 BSC 7.62 BSC 0_ 15 _ 0_ 15 _ 0.020 0.040 0.51 1.02
-T-
SEATING PLANE
M
M
J
TA
DIM A B C D F G H J K L M N
DW SUFFIX SOG PACKAGE CASE 751D-04 -A-
20 11 NOTES: 1. DIMENSIONING AND TOLERANCING PER ANSI Y14.5M, 1982. 2. CONTROLLING DIMENSION: MILLIMETER. 3. DIMENSIONS A AND B DO NOT INCLUDE MOLD PROTRUSION. 4. MAXIMUM MOLD PROTRUSION 0.150 (0.006) PER SIDE. 5. DIMENSION D DOES NOT INCLUDE DAMBAR PROTRUSION. ALLOWABLE DAMBAR PROTRUSION SHALL BE 0.13 (0.005) TOTAL IN EXCESS OF D DIMENSION AT MAXIMUM MATERIAL CONDITION. DIM A B C D F G J K M P R MILLIMETERS MIN MAX 12.65 12.95 7.40 7.60 2.35 2.65 0.35 0.49 0.50 0.90 1.27 BSC 0.25 0.32 0.10 0.25 0_ 7_ 10.05 10.55 0.25 0.75 INCHES MIN MAX 0.499 0.510 0.292 0.299 0.093 0.104 0.014 0.019 0.020 0.035 0.050 BSC 0.010 0.012 0.004 0.009 0_ 7_ 0.395 0.415 0.010 0.029
-B-
1 10
10X
P 0.010 (0.25)
M
B
M
20X
D
M
0.010 (0.25)
TA
S
B
J
S
F R C -T-
18X SEATING PLANE X 45 _
G
K
M
MOTOROLA
MC145444 11
Motorola reserves the right to make changes without further notice to any products herein. Motorola makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does Motorola assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation consequential or incidental damages. "Typical" parameters can and do vary in different applications. All operating parameters, including "Typicals" must be validated for each customer application by customer's technical experts. Motorola does not convey any license under its patent rights nor the rights of others. Motorola products are not designed, intended, or authorized for use as components in systems intended for surgical implant into the body, or other applications intended to support or sustain life, or for any other application in which the failure of the Motorola product could create a situation where personal injury or death may occur. Should Buyer purchase or use Motorola products for any such unintended or unauthorized application, Buyer shall indemnify and hold Motorola and its officers, employees, subsidiaries, affiliates, and distributors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized use, even if such claim alleges that Motorola was negligent regarding the design or manufacture of the part. Motorola and are registered trademarks of Motorola, Inc. Motorola, Inc. is an Equal Opportunity/Affirmative Action Employer.
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JAPAN: Nippon Motorola Ltd.; Tatsumi-SPD-JLDC, Toshikatsu Otsuki, 6F Seibu-Butsuryu-Center, 3-14-2 Tatsumi Koto-Ku, Tokyo 135, Japan. 03-3521-8315 HONG KONG: Motorola Semiconductors H.K. Ltd.; 8B Tai Ping Industrial Park, 51 Ting Kok Road, Tai Po, N.T., Hong Kong. 852-26629298
MC145444 12
*MC145444/D*
MC145444/D MOTOROLA

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