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Universal Telephone IC
Description
* All Functions Integrated
U3762MB
TEMIC's low-voltage telephone circuit U3762MB performs all the speech and line interface functions required in an electronic telephone set, the tone ringer, the
pulse and DTMF dialing with redial. Operation below 15 mA is possible with reduced performance (no dialing).
Features
Speech Circuit Tone Ringer
D Adjustable DC characteristic D Symmetrical input of microphone amplifier D Receiving amplifier for dynamic or
piezo-electric earpieces
D 2-tone ringer D Adjustable volume D RC oscillator D Adjustable threshold
D Automatic line-loss compensation D Anti-clipping in transmit direction
Dialer
D DTMF / pulse switchable D Pulse dialing 66/33 or 60/40 or DTMF dialing
selectable by pin
Benefits
D Low number of external components D High quality through one IC solution
D D D D
Flashing time duration 98 ms Pause function Last number redial up to 32 digits Standard low-cost crystal 3.57 MHz or ceramic resonator
D Key tone
Ordering Information
Type U3762MB-MFN U3762MB-MFNG3 Package SSO44 SSO44 Taped and reeled Remarks
Rev. A1, 15-Sep-98
1 (23)
Preliminary Information
U3762MB
Tip
Block Diagram / Applications
2 (23)
VI HKS 470 W 5 MW HKS 75 V Ring 470 nF 3 kW 2N5401 CL 2.2 nF PRIND Transmit amplifier CLIM VL Control function Sidetone amplifier ST 47 nF RECIN 2.2 Control function Receiving amplifier RECO1 1.8 kW 100 W RECO2 12 k W AGC RDC VI VRING Supply Power on reset 10 k W OUT Clock signal oscillator Divider Tone signal generator VRIAC 10 kW THA
14912
5.1 V 220 kW
100 k W 470 mF MPSA42 33 k W 18 kW 220 nF 220 nF
1 mF
3.58 MHz
to key board matrix
1 kW
XT HKS
XT
MODE
Mask
DP
VDD
MFO
MIC1
MIC2
MICO
TIN
2.2
mF
13 V/ 1W
Clock generator - +
Micro- phone amplifier 2.4 k W
Earth Mute control
680W
330 W
KT
3.3 nF
C1
C2
Pulse control logic
C3 Read - write counter Supply current regulator Control logic
Receiver attenuation
C4
mF
R1 RAM AGC current generator Data latch & decoder D/A converter ROW & column programmable counter
Figure 1.
Location latch
1
2
3
R2
4
5
6
R3
Key- board inter- face
7
8
9
F
R4
*/T 0
# R/P
39 W 1W
300 W 100 mF
Preliminary Information
Divider Bandgap reference Comparator with hysteresis
MFIND
MUTE 10 mF
TEST
1 nF
RCK
150 kW
HFI
Rev. A1, 15-Sep-98
HFO
Handsfree control logic
U3762MB
Pin Description
C1 1 C2 2 C3 3 C4 4 Earth 5 HFI 6 HFO 7 XT 8 XT 9 MFO 10 MFIND 11 44 43 42 41 40 39 38 37 36 35 34 R4 R3 R2 R1 Mask DP MODE KT HKS n.c. TEST VDD OUT
U3762MB
GND 12 MIC 1 13 MIC 2 14 MICO 15 VL 16 RDC 17 TIN 18 VI 19 MUTE 20 PRIND 21 RECIN 22
14835
33 32
31 RCK 30 VRING 29 VRIAC 28 AGC
27 THA 26 ST 25 24 23 SSO44 CLIM RECO 1 RECO 2
Rev. A1, 15-Sep-98
3 (23)
Preliminary Information
U3762MB
1 2 3 4 5 C1 C2 C3
C2-C4
Keyboard input
C1
C4 Earth Earth key ( 604 ms high pulse, 1 s pause)
EARTH
7
HFO
Output will be toggled by each LH edge at HFI.
HFO
9
XT
XT
PD
VDD
XT
PD
10
MFO
Error (%) +0.28 -0.52 -0.47 -0.10 +0.57 -0.30 -0.34
MFO
4 (23)
Preliminary Information
E E E
Output of DTMF DTMF output frequency Specified Actual (Hz) (Hz) 697 699 R1 770 766 R2 852 848 R3 941 940 R4 C1 1209 1216 1336 1332 C2 1477 1472 C3
VDD
E
E
E
8
XT
A built-in inverter provides oscillation with an inexpensive 3.579545-MHz crystal or ceramic resonator
VDD
EE E
HFI
VDD
PD
VDD
PD
VDD
VDD
VDD
PD
Rev. A1, 15-Sep-98
200K
EE
6
HFI
Input with 200 kW pull-down resistor. HFI triggers HFO with each LH edge.
E E EE E E E E
VDD PD VDD VDD
Pin
Symbol
Function
Configuration
VDD
VDD
PD = Protection Device VDD
PD
E
U3762MB
Pin 11 Symbol MFIND Function Output switches to low being in temporary DTMF mode. Reset by on hook condition.
MFIND
Configuration
VDD
12 13
GND MIC 1
Ground Inverting input of microphone amplifier
14
MIC 2
Non-inverting input of microphone amplifier
50K
1V
MIC1 MIC2
50K 1V
15
MICO
Transmit pre-amp output which is normally capacitively coupled to Pin TIN
MICO
PD
16
VL
Positive supply voltage input to the device. The current through this pin is modulated by the transmit signal.
VL
PD 16V
RDC
AGC
PD
RDC
1V 5.6K
TIN
PD
16V
Rev. A1, 15-Sep-98
Preliminary Information
EE EE
18
TIN
Input to the line output driver amplifier. Transmit AGC applied to this stage.
E
17
RDC
An external resistor (1 W) is required from this pin to GND to control the DC input impedance of the circuit. It has a nominal value of 39 W for low-voltage operation. Values up to 100 W may be used to increase the available transmit output voltage swing at the expense of low-voltage operation.
EE E E E
E
VI
E
MFIND
PD
VI
PD
PD
VI
1V
16K
PD VL
PD
5 (23)
U3762MB
Pin 19 Symbol VI Function This internal voltage bias line must be connected to VL via an external resistor which dominates the AC input impedance of the circuit and should be 680 for an 600-W input impedance or 1.2 k for a 900- input impedance. Pin for testing
MUTE
PD 6.7V
Configuration
VI
16V PD
MUTE
21
PRIND
PD
22 23 24
RECIN RECO2 RECO1
Receive amplifier input. The receiving amplification is regulated by an AGC. Output of the receive amplifier. Dynamic transducers with a minimum impedance of 100 W can be directly driven by these outputs.
RECIN
RECO2 RECO1
6.7V PD
25
CLIM
6V PD
26
ST
16V PD VRIAC
27
THA
Ringer threshold adjustment
12K
140K 20K
THA
PD
6V 6V
28
AGC
The range of transmit and receive gain variations between short and long loops may be adjusted by connecting a resistor RAGC from this pin to (GND). This pin can be left open to set AGC out of action.
AGC
PD
RDC
29
VRIAC
Ringing supply
10K
50V PD
6 (23)
Rev. A1, 15-Sep-98
Preliminary Information
EEE
VRIAC
70K
E EE
E
The output of the sidetone cancellation signal, which requires a balanced impedance of 8 to 10 times the subscribers line impedance to be connected to Pin VL.
ST
E
Time constant of anticlipping in transmit path. CLIM 2.2 mF CLIM = GND: anticlipping inactive
w
CLIM
E EE E E
PRIVACY indication pin Open collector with minimum 1 mA drive current to GND when PRIVACY = active
PRIND
6.7V
VL
60K
VL
60K
VL IDC
E
20
MUTE
30K
E
VBG 1V 1V VL PD
E E
U3762MB
Pin 30 Symbol VRING Function DC supply voltage for the tone ringer is limited to 30 V with integrated Z-diode.
VRING
30V PD 6.5K 200
Configuration
OUT
PD
50V
31
RCK
RC clock oscillator for ringer
RCK
PD
6V 6V
32
OUT
Buzzer output
VRING
PD 30V 200 6.5K
OUT
50V PD
33
VDD
Supply output for dialer part
VDD
6V
PD
34
TEST
TEST input with 6.25 kW pull-up resistor
TEST
VDD
VDD
PD
35 36
n.c. HKS
Not connected Hook switch input. HKS = 0: On-hook state. Chip in sleep mode, no operation (with a pull-down resistor of about 400 kW). HKS = 1: Off-hook state. Chip enable for normal operation. Keytone output only sent out in pulse mode
KT
VDD
HKS
200K
VDD
PD VDD
PD
Rev. A1, 15-Sep-98
Preliminary Information
E
E
37
KT
VDD
400k
E EE EE
3.4V 0.8V VL 6V
VDD
E EE E E E E E E
7 (23)
U3762MB
Pin 38 Symbol MODE Function Pulling MODE pin to: C3 tone mode with 87 ms burst time and 140 ms pause C4 tone mode with 87 ms DTMF burst and 87 ms pause R1 pulse mode with 20 pps, Make/Break = 40/60 R2 pulse mode with 20 pps, Make/Break = 33/66 R3 pulse mode with 10 pps, Make/Break = 40/60 R4 pulse mode with 10 pps, Make/Break = 33/66 C1 pulse mode with 10 pps, Make/Break = 33/66 and temp. DTMF with 87 ms DTMF burst, 140 ms pause MODE pin pulled to R4: with temporary DTMF, 87 ms DTMF burst and 87 ms pause Pulse dialing output. Flash key will cause DP to be active in either DTMF mode or pulse mode. In On-hook state is DP = VDD. Configuration
PD
39
DP
DP
40
Mask
Short mute during pulse dialing, active high
MASK
41 42 43 44
R1 R2 R3
R1
R2-R4
R4
8 (23)
Preliminary Information
E E E E
E
Keyboard input
VDD
PD VDD
PD
E E
MODE
E E
E
VDD
VDD
VDD
PD VDD
PD
VDD
VDD
Rev. A1, 15-Sep-98
A AA A AA A A A AAA AA A A AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA AA A A A AAA AA A A AA A AA AA A A A AAA AA AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA A AA AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA AA AA A AA A A A AAA AA A A A AAA AA A
The R/P key can execute the redial function only as the first key-in after off-hook; otherwise, it executes the pause function (3.6 s). Keys stored in redial memory: 0 to 9, *, #, R/P, F
A A A AA A A A A A AAAAAAAAAAAAAAAAA AAAAAAAAAAAAAAAAA A A A AA A A A A A AA A A A A AAAAAAAAAAAAAAAAA AAAAAAAAAAAAAAAAA A A A AA A A AAAAAAAAAAAAAAAAA A A AA A A A
1. 2. 3.
Keyboard Operation
AAAAA A AA A AAAAAAAAAAAAAAAAAAAAAAAA A AAAA AAAAA A AA A AAAAAAAAAAAAAAAAAAAAAAAA A AAAA AAAAAAAAAAAAAAAAAAAAAAAA A AAAA AAAAAAAAAAAAAAAAAAAAAAAA A A AAAAA A AAAAAAAAAAAAAA AAAAAAA A AAAA AAAAAAAAAAAAAAAAAAAAAAAA A AAAA AAAAAAAAAAAAAAAAAAAAAAAA A AAAA AAAAAAAAAAAAAAAAAAAAAAAA A AAAA AAAAAAAAAAAAAAAAAAAAAAAA A AAAA AAAAAAAAAAAAAAAAAAAAAAAA AAAAAAAAAAAAAAAAAAAA AAAA AAAAAAAAAAAAAAAAAAAAAAAA A AAAA AAAAAAAAAAAAAAAAAAAAAAAA AAAAAAAAAAAAAAAAAAAA AAAA
:/T
C1 1 4 7 C2 2 5 8 0 C3 3 6 9 # F: Flash key : hand set, MIC mute F R/P C4 R1 R2 R3 R4
Rev. A1, 15-Sep-98
Redialing
Normal Dialing
D R/P: Redial and pause function key D :/T: : function;
OFF HOOK
OFF HOOK
D1, D2, ..., Dn will be dialed out. Dialing length is unlimited, but redial is inhibited if length oversteps 32 digits. If redialing length oversteps 32 digits, the redialing function will be inhibited.
pulse-to-tone function
,
D1
,
D1
,
D2
,
Preliminary Information
, ..., D2 Dn , ..., BUSY, Come Dn
D D
ON HOOK
,
OFF HOOK
U3762MB
,
9 (23) R/P
U3762MB
HKS tKRD KEY IN 3 tKID DP tIDP MUTE
BM
4
2
2 tKID
tPDP
tIDP
BM
tIDP
tPDP
tIDP
MASK Low
MFO
OSC
Oscillation
15019
Figure 2. Pulse mode normal dialing
HKS tKRD KEY IN R/P tKID DP
BM
ttPDP MUTE
tIDP
BM
tIDP
tIDP
MASK Low
MFO
OSC
Oscillation
15020
Figure 3. Pulse mode auto dialing
10 (23)
Rev. A1, 15-Sep-98
Preliminary Information
U3762MB
HKS tKRD KEY IN R/P tKID DP
BM
t > tOHD
tPDP MUTE
tIDP
BM
tIDP
MASK Low
MFO
OSC
Oscillation
15021
Figure 4. Pulse mode auto dialing
HKS tKRD KEY IN 3 tKID DTMF MUTE tTD tITP tITP tITP 4 2 5
MASK DP
Low High
OSC
Oscillation
15022
Figure 5. DTMF mode normal dialing
Rev. A1, 15-Sep-98
11 (23)
Preliminary Information
U3762MB
HKS tKRD KEY IN R/P tKID DTMF MUTE tTD tITP tITP tMASK DP
Low High
OSC
Oscillation
15023
Figure 6. DTMF mode auto dialing (tttOHD)
HKS tKRD KEY IN R/P tKID DTMF MUTE tTD tITP t > t OHD
MASK DP
Low High
OSC
Oscillation
15024
Figure 7. DTMF mode auto dialing (tutOHD)
12 (23)
Rev. A1, 15-Sep-98
Preliminary Information
U3762MB
Access Pause
A A A AA A AA A AA A A A AAAAAAAAAAAAAAAAAAAAAAAA AAAAAAAAAAAAAAAAAAAAAAAA A A A AA A AA A AA A A A AA A AA A AA A A AAAAAAAAAAAAAAAAAAAAAAAA AAAAAAAAAAAAAAAAAAAAAAAA A A A AA A AA A AA AAAAAAAAAAAAAAAAAAAAAAAA A A AA A AA A AA A
OFF HOOK , D1 , D2 , R/P , D3 , ..., Dn' 1. 2. The pause function can be stored in the memory. The pause function is executed in normal dialing and redialing. HKS KEY IN tKID DP tPDP MUTE tP MASK Low tPDP 2 R/P 3 tIDP MFO OSC Oscillation
15025
Figure 8. Pause function
Rev. A1, 15-Sep-98
13 (23)
Preliminary Information
U3762MB
Pulse-to-Tone (:/T)
A A A A AA A A A A A AA AA A A A AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA A A A A A AA A A A A A AA AA A AA A A A AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA A A A A AA A A A A A AA AA AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA A A A AA A A A A A AA AA A A A AA A A A A A AA AA A A
OFF HOOK , D1 , D2 , ..., Dn ,
:/T
,
D1'
,
D2'
, ...,
Dn'
1. a)
If the mode switch is set to pulse mode, then the output signal will be: D1, D2, ..., Dn, Pause (3.6 s), D1', D2' ,..., Dn' (Pulse) (Tone) (Tone), (Tone)
1. b) 2.
(Pulse),
if MODE pin = C2, * is sent out as DTMF tone
If the mode switch is set to tone mode, then the output signal will be: D1, D2, ..., Dn, (Tone) * (Tone) , D1', D2', ..., Dn' (Tone)
3.
The dialer remains in tone mode when the digits have been dialed out and can be reset to pulse mode by going on-hook only.
HKS
KEY IN tKID DP tPDP MUTE
2
*/T
3
tIDP
tP MASK
MFO
OSC MFIND
Oscillation
15026
Figure 9. Pulse-to-tone operation
14 (23)
Rev. A1, 15-Sep-98
Preliminary Information
U3762MB
AAA A A A AAA A A A AAAAAAAAAA AAAAAAAAAA AAAAAAAAAA AAA AA A AAAAAAAAAA AAAAAAAAAA AA
OFF HOOK , Fn 1. 2. 3. HKS KEY IN F tKID DP MUTE MASK MFO OSC tKID tKRD tPDP tIDP tTD = key active in debounce = key release debounce = pre-digit pause = inter-digit pause = DTMF output duration KEY IN DP MUTE MASK EARTH Rev. A1, 15-Sep-98
Flash (F)
The dialer will execute flash break and the entire flash pause time will elapse before the next digits are dialed out.
The flash key can be stored as a digit in the memory. Only one flash, however, will be released to the users. The system will return to the initial state after the flash pause time has elapsed. High
F tFB tFP
3
tFP
tITP Oscillation
15027
Figure 10. Flash operation
tITP tFB tFP tP
= intertone pause = flash break time = flash pause time = pause time
Low
15028
Figure 11. Symbolic timing diagram: Earth function
15 (23)
Preliminary Information
U3762MB
Off hook HKS HFI HFO PD
Figure 12. Symbolic timing diagram: HFI, HFO function
14909
Off hook HKS On hook
DP 165 ms
Figure 13. Symbolic timing diagram: on hook debounce time
15029
Absolute Maximum Ratings
Parameters Line current DC line voltage Junction temperature Ambient temperature Storage temperature Total power dissipation, Tamb = 60C Junction ambient Symbol IL VL Tj Tamb Tstg Ptot RthJA Value 140 14 125 - 25 to + 75 - 55 to + 150 0.9 70 Unit mA V C C C W K/W
SSO44 SSO44
ESD withstand voltage 1 kV according to MIL standard 883d method 3015.7 (HBM)
16 (23)
Rev. A1, 15-Sep-98
Preliminary Information
U3762MB
Electrical Characteristics Speech Circuit
Reference point Pin GND, f = 1000 Hz, 0 dBm = 775 mVrms, RDC = 39 / 1 W, Tamb = 25C, unless otherwise specified, refer to "Basic Test Circuit".
Parameters Line voltage
Test Conditions / Pin IL = 8 mA IL = 20 mA IL = 73 mA IL = 100 mA Ri IL = 20 mA, S5 = open IL = 20 to 60 mA RAGC = infinite Tamb = -10 to +60C IL = 20 mA RAGC = 12 kW, IL = 73 mA IL = 20 mA, Vmic = 10 mV, CLIM = 2.2 mF, S1 = open IL > 20 mA, GS = 48dB IL
Symbol VL
Min. 3.6 5.9 6.9
Typ. 1.4 3.85 6.55
Max. 4.1 7.2 8.2 120 48.8 0.5 0.5
Unit V V V V k dB dB dB dB dBm dBmp dB dBm dBm dB
Transmit and sidetone Input resistance Gain Gain change with current Gain deviation Line-loss compensation Max. output voltage at line Noise at line weighted psophometrically Sidetone reduction DTMF amplifier Volume range d < 5% DTMF output level low frequency group Pre-emphasis between high- and low-level frequency group Receiving amplifier Gain Gain change with current Gain deviation Line-loss compensation Receiving noise at earphone weighted psophometrially Gain change when muted Output voltage push-pull
DGS DGS DGs
VLmax no GSTA
Ri Gs
45 46.8 -0.5 -0.5 - 4.8
80 47.8
-6 1.2
-7
- 72 10 1.3 -8 1 15 20
y 20 mA
Single tone, IL 20 mA IL = 20 mA, S5 = closed PPRE = PHLG - PLLG, S5 = closed
w
VL VL PPRE
-4 3
IL 20 mA IL = 20 to 60 mA RAGC = infinite Tamb = -10 to +60C IL = 20 mA IL = 73 mA IL = 73 mA
w
DGR DGR DGR
ni GRM VRECO Vear
GR
3 -0.5 -0.3 - 4.7 -6 - 77.5
5 0.5 0.7 -7 - 71
dB dB dB dB dBm
IL 20 mA IL 20 mA, Zear = 68 nF, 100 W in series, d 2% Ear protection differential IL = 40 mA, Vgen = 4 Vrms, Zear = 68 nF + 100 W Supply voltage (for internal use only) Output voltage * IL 20 mA dialing mode Available current for IL 20 mA dialing mode peripherals Distortion at line IL = 20 mA, S5 = open VL = 0.775 Vrms Maximum output voltage IL = 20 mA, swing at line VMIC = 50 mVrms Mute suppression transmit IL = 20 mA with privacy function
y y
24 0.8 1.3
29 0.9 1.6
34
dB Vrms Vrms
2.5
y y
VDD IDD dt VL max GSPRIV
2.0 150
6.3
mA
% Vpp dB
V
2 3.4 60 4
*
Output must be limited externally to max. 5.5 V
Rev. A1, 15-Sep-98
17 (23)
Preliminary Information
U3762MB
DC Characteristics Dialer
VDD = 2.7 V, fOSC = 3.58 MHz, all outputs unloaded, S9 closed; HKS = 0 Parameters Memory rentention current Pre-emphasis DTMF distortion DP output sink current Keyboard input drive current Keyboard input sink current Key on resistance all other keys Key off resistance Mask sink / drive current Earth sink / drive current Test Conditions / Pins HKS = 1, VDD = 1.0 V Column/Row RL = 5 kW VPO = 0.5 V VI = 0 V VI = 2.7 V Symbol IMR d IPL IKD IKS RKON RKOFF IM H/L Ie H/L Min. 1 0.5 20 500 5 100 0.5 0.5 Typ. 2 - 30 Max. 0.1 3 - 23 Unit
mA mA mA
dB dB mA
kW kW mA mA
AC Characteristics Dialer
Parameters Keypad active in debounce mode Key release debounce Pre-digit pause Test Conditions / Pins Symbol tKID tKRD tPDP tPDP tPDP tPDP tIP tIP M/B Min. 15 15 37 31 Typ. 20 20 40 33.3 20 16.65 836 512 40:60 33:67 87 87 87 140 98 1 3.6 220 Max. 25 25 41 33.5 Unit ms ms ms ms ms ms ms ms % % ms ms ms ms ms s s ms
Inter-digit pause ( auto dialing ) Make/break ratio
DTMF output duration Inter-tone pause Flash break time, F Flash pause time Pause time On-hook debounce time
MODE pin = R3 (10 pps) MODE pin = C1, C2, C4 (10 pps) MODE pin = R1 (20 pps) MODE pin = R2 10 pps, tIP = tIDP + tPDP 20 pps MODE pin = R1 (20 pps), R3 (10 pps) MODE pin = C1, C2, R4 (10 pps) R2 (20 pps) Auto dialing, MODE = C4 MODE = C3 Auto dialing, MODE = C4 MODE = C3 C4 connected to R3 F
810 40.8:60.2 35.6:64.4
860 39.2:60.8 31.2:68.8 90 90 90 147 101 1.1 3.7
tTD tITP tFB tFP tP tohd
84 84 84 135 95 0.9 3.5
18 (23)
Rev. A1, 15-Sep-98
Preliminary Information
U3762MB
Parameters Break duration Test Conditions / Pins MODE pin = R3 MODE pin = C1, C2, R4 MODE pin = R1 (20 pps) MODE pin = R2 MODE pin = R3 MODE pin = C1, C2, R4 MODE pin = R1 (20 pps) MODE pin = R2 MODE pin = C1, C2, R3, R4 MODE pin = R1, R2 (20 pps) Symbol tB tB tM tM tP tP 95 38 31 Min. 57.6 63 Typ. 60 66.7 30 33.35 40 33.3 20 16.65 100 50 Max. 62.4 69 Unit ms ms ms ms ms ms ms ms ms ms
Make duration
41 35
Break + make duration
105
Electrical Characteristics Tone Ringer
fRCK = 4 kHz, VRING = 20 V, Tamb = 25_C, reference point GND, unless otherwise specified Parameters Supply current, outputs open Switch-on threshold Switch-off threshold Ringing frequency Test Conditions / Pins VRIAC = 20 V VRIAC, THA = open VRIAC R = 150 k, C = 1 nF VRIAC > VRON Symbol IRING VRON VROFF f1H f1L f2 Vout toff Min. 2.1 8 5.0 937 752 11.5 21 Typ. Max. 3.8 10 6.5 1083 868 14.0 100 Unit mA V V Hz Hz Hz Vpp ms
9 5.6 1010 808 12.5 23 65
Audio sequence frequency Output voltage swing Turn-off delay
VRing = 25 V, Cout = 68 nF See figure 11
Volt VRING 0
12459
t
VRIAC 0 t
OUT Melody t 0 toff
Figure 14. Turn-off delay time
Rev. A1, 15-Sep-98
19 (23)
Preliminary Information
OUT
I/O
VMIC VGEN 100 mV CL 100 m 1m 25k 600 S5 220n S8 S6 VDD VL 13V 4.7k S11 XT ST 47n RECIN VI RECO1 VRECO RECO2 330 AGC RDC PRIND VRING VRIAC OUT THA 68n VRIAC 39
OUT
I/O
U3762MB
Basic Test Circuit
To tester
To tester
Preliminary Information
MIC1 MIC2 MFO MICO TIN KT DP MODE HKS XT
To tester
20 (23)
To tester To tester ab S7 VGEN 300 mV / 1 kHz VDD 8.2k 25k a S9 b 220 m 100n IL 1.5k VL 2.2n 620 100 m 2.2 m
I/O
IN
CLOCK
IN
3.58 MHz
IN
Figure 15. Basic test circuit
IN
IN IN
IN
IN
U3762MB
IN IN
12k
S1
I/O OUT
OUT
OUT
2.2 m F RCK TEST HFI HFO GND
C1 C2 C3 C4 R1 R2 R3 R4 MUTE MASK MFIND EARTH CLIM
To tester
150k
1n
IN IN OUT
VRING
14836
Rev. A1, 15-Sep-98
U3762MB
Equations for Electrical Characteristic Parameters of the Speech Circuit
The equations refer to the basic test circuit. If not otherwise specified, the switches in the basic test circuit are inactive. Transmit gain GS
+ 20
log
VL V MIC
VMIC = 3 mV/1 kHz, S5 = open
Receiving gain GR
+ 20
log
V RECO VL
RX-mode: Vgen = 300 mV/1 kHz, S7b
Line-loss compensation transmit DGS GS(at IL 73 mA)-GS(at I L
+
+
+ 20 mA)
TX-mode: VMIC = 3 mV/1 kHz, S5 = open
Sidetone reduction GSTA
+ 20
log
VL (in TX-mode) V RECO
) GR
TX-mode: VMIC = 3 mV/1 kHz, S5 = open
Line-loss compensation receive DGR GR(at I L 73 mA)-GR(at I L
+
+
+ 20 mA)
RX-mode: Vgen = 300 mV/1 kHz, S7b
Gain change when muted GRM
+ 20
log
V RECO (Mute VL
+ inactive)-20
log
V RECO (Mute VL
+ active)
Vgen = 100 mV/1 kHz, S5 = open, S8 = open
Input impedance of microphone amplifier 50 k Ri V L (S6 + closed) -1 V L(S6 + open)
+
TX-mode: VMIC = 3 mV/1 kHz, S5 = open
Rev. A1, 15-Sep-98
21 (23)
Preliminary Information
U3762MB
Packaging Information
Package SSO44
Dimensions in mm
18.05 17.80 9.15 8.65 7.50 7.30
2.35 0.3 0.8 16.8 44 23 0.25 0.10
0.25 10.50 10.20
technical drawings according to DIN specifications 13040
1
22
22 (23)
Rev. A1, 15-Sep-98
Preliminary Information
U3762MB
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 Semiconductors GmbH, P.O.B. 3535, D-74025 Heilbronn, Germany Telephone: 49 ( 0 ) 7131 67 2594, Fax number: 49 ( 0 ) 7131 67 2423
Rev. A1, 15-Sep-98
23 (23)
Preliminary Information

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