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U4037B-N
mC-Controlled Speech and Ringer Circuit
Description
The C-controlled telephone circuit U4037B is a linear integrated circuit for use in telephone sets. It contains the speech circuit, tone-ringer interface, sidetone equivalent and ear-protection rectifiers. The circuit is line powered and contains all components necessary for amplification of signals and adaptation to the line.
Features
D D D D D D D D D
DC characteristic adjustable Receive gain adjustable Symmetrical input of microphone amplifier Anti-clipping in transmit direction Automatic line-loss compensation Symmetrical output of earpiece amplifier Built-in ear protection DTMF and MUTE input Adjustable sidetone suppression independent of sending and receiving amplification
D 2-bit D/A for volume control D Supply voltages for all functional blocks of a
subscriber set
D Operation possible from 8-mA line currents
Benefits
D Complete system integration of analog signal
processing on one chip
D Very few external components
D Power down D Tone-ringer interface
Applications
Telephone sets
Block Diagram
Speech circuit Power supply
PWR
mC
Tone ringer
14076
Ordering Information
Type U4037B-NFL U4037B-NFLG3 Package SO24 SO24 Remarks Taped and reeled
Rev. A2, 02-Aug-99
1 (7)
Preliminary Information
U4037B-N
Pin Description
Pin 6 MICO ST TXACL AGA DTMF 1 2 3 4 5 24 MIC2 23 MIC1 22 RECO2 21 RECO1 20 RIF 19 RECIN 18 VB 17 IMP 10 PD 9 16 GND 15 VL 14 IND 13 OUT1
16276
Symbol VOL1 MU/ VOL2
7
VOL1 6 MU/VOL2 7 MEL 8
8 9
MEL PD
VMP
VMP 10 VRING 11 OUT2 12
11 12 13 14
VRING OUT2 OUT1 IND
Function 2-bit volume adjustment for tone ringer 1. 2-bit volume adjustment for tone ringer 2. Mute of microphone amplifier: - Speech condition, input MU/VOL2 low - DTMF condition input MU/VOL2 high DTMF signal at Pin 5 is fed to the line. A part of the DTMFsignal is passed to the receiving amplifier as a confidence signal during dialing. Input for melody Active high input for reducing the current consumption of the circuit, simultaneously VL is shorted by an internal switch Regulated supply voltage 3.4 V for peripheral circuits (esp. microprocessors), minimum output current: 2 mA (ringing) 4 mA (speech mode) Input for ringersupply voltage Differential output for tone ringer p g The internal equivalent inductance of the circuit is proportional to the value of the capacitor at this pin, a resistor connected to ground may be used to reduce the DC line voltage Line voltage Reference point for DC- and ACoutput signals Impedance adjustment Unregulated supply voltage for peripheral circuits (voice switch), limited to typically 7 V Receiver input Pin for adjustment of frequency response and gain of receiver Output of receiving amplifier Inverting output of receiving ampl. Inverting input of microphone ampl. Non-inverting input of microphone amplifier
Figure 1. Pinning
15 16 17 18
VL GND IMP VB
Pin 1 2 3 4
5
Function Output of microphone preamplifier Sidetone reduction input input resistance is approx. 25 k. TXACL Time constant of anti-clipping in transmit path AGA Automatic gain adjustment with line current, a resistor connected from this pin to GND sets the starting point maximum gain change: 6 dB. DTMF Input for DTMF signals
Symbol MICO ST
19 20 21 22 23 24
RECIN RIF RECO1 RECO2 MIC1 MIC2
2 (7)
Rev. A2, 02-Aug-99
Preliminary Information
Rev. A2, 02-Aug-99
23k 33n 1n 1m 20k MICO 33k ST RIF RECO1 RECO2 TXACL 100n 50 50 560 + TXACL MIC1 - RECIN 220n MIC2 TXA VL 10n 16V RA Power down control PD 10 1M
VMP
1k
15k
6.8n
12k
*
* *
DTMF 10 IMP AGA AGA 10m DC - Mask and supply IND
3.3n 10k
*
*
VB VMPREG1 VMP
1k
6.8n
3.3M 200k 12V
*
5.6n
20k
*
10k
51k
1000 m
Tip
*
*
Detailed Block Diagram with External Components
Figure 2. Application circuit
GND
4.7n
47 m
130k
Preliminary Information
VMPREG2 BUZA VRING 10m Volume control OUT1 OUT2 VOL1 MU/ VOL2 MEL
Ring
*
to mC
VMP
mC
16277
U4037B-N
*
Value depends on the application
3 (7)
U4037B-N
Absolute Maximum Ratings
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Thermal Resistance
Junction ambient SO24 Parameters Symbol RthJA Value 75 Unit K/W
Parameters Line current DC line voltage Maximum input current Junction temperature Ambient temperature Storage temperature Total power dissipation, Tamb = 60C
Symbol IL VL IRING Tj Tamb Tstg Ptot
Value 140 12 15 125 -25 to +75 -55 to +150 520
Unit mA V mA C C C W
Electrical Characteristics
f = 1 kHz, 0 dBm = 775 mVrms, IMP = 2 mA, Tamb = 25C, Zear = 68 nF + 100 W, ZM = 68 nF, unless otherwise specified Parameters DC characteristics Test Conditions / Pin Symbol Min. Typ. 2.4 5.0 7.5 9.4 48 Max. Unit
IL = 2 mA 4.6 IL = 14 mA DC voltage drop over circuit VL IL = 60 mA 8.8 IL = 100 mA Transmission amplifier, IL = 14 mA, VMIC = 2 mV, unless otherwise specified Transmitting amplification GT 47 IL 14 mA, Frequency response DGT f = 300 to 3400 Hz Gain change with current IL = 14 to 100 mA DGT Gain deviation Tamb = - 10 to + 60 C DGT CMRR of microphone CMRR 60 amplifier Input resistance of MIC amplifier Ri IL > 14 mA Distortion at line dt VL = 700 mVrms IL > 19 mA, d < 5% Maximum output voltage VLmax 1.8 Vmic = 10 mV CTXA = 1 mF Noise at line psophometrically IL > 14 mA no weighted GT = 48 dB Anti-clipping attack time CTXA = 1 mF release time each 3 dB overdrive IL = 100 mA, Line-loss compensation DGTI - 6.4 RAGA = 20 kW Mute suppression GTM 60 IL 14 mA
5.4 V 10.0 49 dB dB dB dB dB kW 2 % dBm dBmp ms - 5.2 dB dB
w
"0.5 "0.5 "0.5
80 50
3 - 80 0.5 9 - 5.8 80
4.2 -72
w
4 (7)
Rev. A2, 02-Aug-99
Preliminary Information
U4037B-N
Electrical Characteristics (continued)
Parameters Test Conditions / Pin Symbol Min. Receiving amplifier, IL = 14 mA, unless otherwise specified, VGEN = 300 mV Receiving amplification GR Adjustment range GR -8 Amplification of DTMF signal from IL 14 mA, GRM 14 DTMF IN to RECO 1, 2 VDTMF = 8 mV IL > 14 mA, Frequency response DGRF f = 300 to 3400 Hz Gain change with current IL = 14 to 100 mA DGR Gain deviation Tamb = - 10 to + 60C DGR IL 14 mA Ear protection differential EP VGEN = 11 Vrms MUTE suppression DGR 60 IL 14 mA IL = 14 mA Output voltage d 2% 0.775 Zear = 68 nF + 100 W differential IL = 14 mA Output voltage d 5% 1.2 Zear = 68 nF + 100 W differential RDC = infinite Zear = 68 nF + 100 W Receiving noise ni psophometrically weighted IL 14 mA Output resistance each output against GND Ro RAGA = 20 kW, Line-loss compensation DGRI - 7.0 IL = 100 mA IL = 8 mA, IMP = 1 mA IM = 300 mA Gain at low operating current GR 10.5 VGEN = 100 mV RDC = 68 kW DTMF-amplifier test conditions: IMP = 2 mA IL = 15 mA, DTMF amplification GD 40.7 VDTMF = 8 mV Mute active IL = 15 mA Gain deviaton GD Tamb = - 10 to + 60 C Input resistance RGT = 15 kW Ri 15 IL 15 mA, Distortion of DTMF signal dD VL = 0 dBm Gain deviation with current IL = 15 to 100 mA DGD Supply voltages, Vmic = 10 mV, Tamb = - 10 to + 60C IL = 8 mA, VMP VMP 3.1 RDC = 130 kW IMP = 1 mA Ringing part, IVMP = 1 mA Maximum output voltage VRING = 20 V Vout f = 300 Hz to 3400 Hz Input impedance in speech mode Ri 50 IL > 15 mA, Typ. Max. 12 12 20 Unit dB dB dB dB dB dB Vrms dB Vrms Vrms -64 40 - 6.0 - 5.0 dBmp
W
w
v v
w w
"0.5 "0.5 "0.5
2.2
w
dB
12
13.5
dB
41.7
42.7
dB dB kW % dB
"0.5
20 25
w
"0.5
3.4 3.6
2
V
25
Vpp kW
VTIP/RING = 1.5 Vrms
Rev. A2, 02-Aug-99
5 (7)
Preliminary Information
U4037B-N
Electrical Characteristics (continued)
Parameters Ringing part: Ringer output voltage Ri t t lt Test Conditions / Pin f = 25 Hz, CBUZ = 50 nF VTIP/RING = 63 Vrms VTIP/RING = 45 Vrms VTIP/RING = 25 Vrms Symbol Min. Typ. Max. Unit
Volume adjustment steps Zener diode voltage PD Input PD input current Input voltage Voltage drop at VL Internal current comsumption at VB IRING = 25 mA PD active, IL > 14 mA VPD = VMP PD = active PD = inactive PD = active, IL = 14 mA IL = 100 mA, VB = 3.5 V, PD = active, IL = 0 mA
Vout Vout Vout 11 10 01 00
VRINGmax
28 18 7 0 -6 -12 -24 28.5 9 2 1.5 1.9 300 0.3
Vpp Vpp Vpp dB V uA V V
Ipd Vpd Vpd VL VL IB
mA
Package Information
Package SO24
Dimensions in mm
15.55 15.30 9.15 8.65 7.5 7.3
2.35 0.25 0.10 13.97 24 13 0.25 10.50 10.20
0.4 1.27
technical drawings according to DIN specifications 13037
1
12
6 (7)
Rev. A2, 02-Aug-99
Preliminary Information
U4037B-N
Ozone Depleting Substances Policy Statement
It is the policy of TEMIC Semiconductor GmbH to 1. Meet all present and future national and international statutory requirements. 2. Regularly and continuously improve the performance of our products, processes, distribution and operating systems with respect to their impact on the health and safety of our employees and the public, as well as their impact on the environment. It is particular concern to control or eliminate releases of those substances into the atmosphere which are known as ozone depleting substances ( ODSs). The Montreal Protocol ( 1987) and its London Amendments ( 1990) intend to severely restrict the use of ODSs and forbid their use within the next ten years. Various national and international initiatives are pressing for an earlier ban on these substances. TEMIC Semiconductor GmbH has been able to use its policy of continuous improvements to eliminate the use of ODSs listed in the following documents. 1. Annex A, B and list of transitional substances of the Montreal Protocol and the London Amendments respectively 2 . Class I and II ozone depleting substances in the Clean Air Act Amendments of 1990 by the Environmental Protection Agency ( EPA) in the USA 3. Council Decision 88/540/EEC and 91/690/EEC Annex A, B and C ( transitional substances ) respectively. TEMIC Semiconductor GmbH can certify that our semiconductors are not manufactured with ozone depleting substances and do not contain such substances.
We reserve the right to make changes to improve technical design and may do so without further notice. Parameters can vary in different applications. All operating parameters must be validated for each customer application by the customer. Should the buyer use TEMIC products for any unintended or unauthorized application, the buyer shall indemnify TEMIC against all claims, costs, damages, and expenses, arising out of, directly or indirectly, any claim of personal damage, injury or death associated with such unintended or unauthorized use. TEMIC Semiconductor GmbH, P.O.B. 3535, D-74025 Heilbronn, Germany Telephone: 49 ( 0 ) 7131 67 2831, Fax number: 49 ( 0 ) 7131 67 2423
Rev. A2, 02-Aug-99
7 (7)
Preliminary Information

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