U3761MB [TEMIC]

Low Voltage Standard Telephone Circuit with 13 Memories; 低电压标准电话线与13秋之回忆
U3761MB
型号: U3761MB
厂家: TEMIC SEMICONDUCTORS    TEMIC SEMICONDUCTORS
描述:

Low Voltage Standard Telephone Circuit with 13 Memories
低电压标准电话线与13秋之回忆

电话
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中文:  中文翻译
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U3761MB  
Low Voltage Standard Telephone Circuit with 13 Memories  
Description  
TEMIC’s low voltage telephone circuit, U3761MB pulse and DTMF dialing with redial, notice function, and  
performs all the speech and line interface functions 13 memories.  
required in an electronic telephone set, the tone ringer, the  
Features  
Last number redial up to 32 digits  
Speech Circuit  
Three by 32 digits direct (one touch) memory  
Ten by 16 digits indirect (two touch) memory  
Notice function up to 32 digits  
Adjustable DC characteristic  
Symmetrical input of microphone amplifier  
Receiving amplifier for dynamic or  
piezo-electric earpieces  
Standard low-cost crystal 3.57 MHz or  
ceramic resonator  
Automatic line loss compensation  
Dialer  
Tone Ringer  
2 Tone ringer  
DTMF / pulse switchable  
Pulse dialling 66/33 or 60/40 or DTMF dialling  
selectable by pin  
Adjustable volume  
RC oscillator  
Selectable flashing duration by key pad  
Pause function  
Adjustable threshold  
Benefits  
Low number of external components  
High quality through one IC solution  
TELEFUNKEN Semiconductors  
1 (23)  
Rev. A2, 23-Apr-97  
Preliminary Information  
U3761MB  
Block Diagram / Applications  
470  
VDD  
Figure 1.  
2 (23)  
TELEFUNKEN Semiconductors  
Rev. A2, 23-Apr-97  
Preliminary Information  
U3761MB  
SDIP40  
SSO44  
C1  
C2  
1
2
3
4
5
6
7
8
9
44  
43  
42  
41  
40  
39  
38  
37  
R4  
C1  
C2  
1
2
3
4
5
6
7
8
9
40  
39  
38  
37  
36  
35  
34  
33  
R4  
R3  
R2  
R1  
R3  
C3  
R2  
C3  
C4  
R1  
C4  
Mask  
Earth  
NC  
NC  
Mask  
DP  
Earth  
DP  
XT  
XT  
MODE  
BM  
MODE  
XT  
XT  
MFO  
GND  
BM  
36  
35  
34  
33  
32  
31  
30  
29  
28  
27  
26  
25  
HKS  
NC  
32  
31  
30  
29  
28  
27  
26  
25  
24  
23  
22  
21  
HKS  
VDD  
MFO 10  
NC 11  
MIC 1 10  
NC  
OUT  
MIC 2  
MICO  
VL  
11  
12  
13  
14  
U3761MB  
GND  
VDD  
OUT  
12  
13  
U3761MB  
RCK  
MIC 1  
VRING  
VRIAC  
AGC  
MIC 2 14  
RCK  
RDC  
MICO  
15  
VRING  
VRIAC  
AGC  
NC 15  
16  
17  
VL  
16  
THA  
TIN  
RDC  
17  
VI  
ST  
TIN 18  
19  
THA  
PRIVACY  
MUTE 18  
VI  
ST  
19  
20  
VBG  
RECO 1  
RECO 2  
MUTE 20  
PRIVACY  
RECIN  
21  
24  
23  
VBG  
RECO 1  
RECO 2  
12631  
RECIN  
22  
12632  
TELEFUNKEN Semiconductors  
3 (23)  
Rev. A2, 23-Apr-97  
Preliminary Information  
U3761MB  
Pin Description  
SDIP40 SSO44  
Symbol  
Configuration  
Function  
Keyboard input  
1
2
3
4
1
2
3
4
5
C1  
C2  
C3  
C4  
C1  
PD  
PD  
C2–C4  
5
Earth  
NC  
Earth key  
15  
7, 6,  
Not connected  
34, 35  
A built-in inverter provides  
oscillation with an inexpensive  
3.579545 MHz crystal or ceramic  
resonator  
6
7
8
8
XT  
XT  
PD  
XT  
XT  
40P  
40P  
PD  
9
XT  
PD  
XT  
40P  
40P  
PD  
10  
MFO  
Output of DTMF  
DTMF output frequency  
Specified Actual  
Error  
(%)  
(HZ)  
697  
(Hz)  
699  
R1  
R2  
R3  
R4  
C1  
C2  
C3  
+0.28  
–0.52  
–0.47  
+0.74  
+0.57  
–0.30  
–0.34  
770  
766  
MFO  
852  
848  
941  
948  
1209  
1336  
1477  
1216  
1332  
1472  
9
12  
GND  
Ground  
4 (23)  
TELEFUNKEN Semiconductors  
Rev. A2, 23-Apr-97  
Preliminary Information  
U3761MB  
SDIP40 SSO44  
10 13  
Symbol  
MIC 1  
Configuration  
Function  
Inverting input of microphone  
amplifier  
VI  
1V  
50K  
PD  
MIC1  
MIC2  
50K  
1V  
VI  
VI  
PD  
11  
14  
MIC 2  
Non-inverting input of microphone  
amplifier  
1V  
50K  
PD  
MIC1  
MIC2  
50K  
1V  
VI  
PD  
VI  
12  
13  
15  
16  
MICO  
Transmit pre-amp output which is  
normally capacitively coupled to  
Pin TIN  
1V  
16K  
MICO  
PD  
VL  
Positive supply voltage input to the  
device. The current through this  
pin is modulated by the transmit  
signal.  
VL  
16V  
PD  
RDC  
PD  
TELEFUNKEN Semiconductors  
5 (23)  
Rev. A2, 23-Apr-97  
Preliminary Information  
U3761MB  
SDIP40 SSO44  
Symbol  
RDC  
Configuration  
Function  
14  
17  
An external resistor (1 W) is  
VL  
required from this pin to GND to  
control the DC input impedance of  
the circuit. It has a nominal value  
of 39 for low-voltage operation.  
Values up to 100 may be used to  
increase the available transmit  
output voltage swing at the expense  
of low-voltage operation.  
AGC  
RDC  
PD  
PD  
1V  
16  
17  
18  
19  
TIN  
Input to the line output driver am-  
plifier. Transmit AGC applied to  
this stage.  
5.6K  
TIN  
16V  
PD  
V
I
This internal voltage bias line must  
be connected to VL via an external  
resistor, R , which dominates the  
B
VI  
AC input impedance of the circuit  
and should be 680 for an 600  
input impedance or 1.2 kfor a  
900 input impedance.  
16V  
PD  
VBG  
30K  
18  
19  
20  
21  
MUTE  
VBG  
Pin for testing  
MUTE  
MUTE  
VL  
6.7V  
PD  
Pin for test mode  
VBG  
6.7V  
PD  
20  
22  
22  
24  
RECIN  
RECO1  
Receive amplifier input. The  
receiving amplification is regulated  
by an AGC.  
60K  
REC  
IN  
VL  
Output of the receive amplifier.  
Dynamic transducers with a  
minimum impedance of 100 can  
be directly driven by these outputs.  
60K  
1V  
RECO2  
RECO1  
6.7V  
PD  
VL  
21  
23  
RECO2  
60K  
1V  
RECO2  
RECO1  
6.7V  
PD  
6 (23)  
TELEFUNKEN Semiconductors  
Rev. A2, 23-Apr-97  
Preliminary Information  
U3761MB  
SDIP40 SSO44  
Symbol  
Configuration  
Function  
VI  
23  
24  
25  
25  
26  
27  
PRIVACY  
Input for handset mute  
40K  
0.6V  
6V  
6V  
PRIVACY  
PD  
ST  
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  
16V  
PD  
VRIAC  
THA  
Ringer threshold adjustment  
140K  
12K  
1V  
20K  
6V  
6V  
THA  
AGC  
PD  
VL  
26  
28  
AGC  
The range of transmit and receive  
gain variations between short and  
long loops may be adjusted by  
connecting a resistor R  
from  
AGC  
this pin to (GND). This pin can be  
left open to set AGC out of action.  
PD  
RDC  
PD  
27  
28  
29  
30  
VRIAC  
VRING  
Ringing supply  
70K  
10K  
VRIAC  
50V  
PD  
DC supply voltage for the tone  
ringer is limited to 30 V with  
integrated Z-diode.  
VRING  
OUT  
200  
30V  
50V  
6.5K  
PD  
PD  
3.4V  
29  
31  
RCK  
RC clock oscillator for ringer  
0.8V  
RCK  
6V  
6V  
PD  
TELEFUNKEN Semiconductors  
7 (23)  
Rev. A2, 23-Apr-97  
Preliminary Information  
U3761MB  
SDIP40 SSO44  
Symbol  
Configuration  
Function  
Buzzer output  
30  
32  
OUT  
VRING  
OUT  
200  
30V  
50V  
6.5K  
PD  
PD  
VL  
31  
32  
33  
36  
VDD  
HKS  
Supply output for dialer part  
6V  
VDD  
6V  
PD  
Hook switch input.  
HKS = 1: On-hook state. Chip in  
sleep mode, no operation.  
HKS = 0: Off-hook state. Chip  
enable for normal operation with a  
pull-high resistor of about 4 M .  
HKS  
B/M  
PD  
PD  
33  
34  
37  
38  
BM  
If BM = floating pulse dialing with  
3:2 B/M ratio  
If BM is connected to ground pulse  
dialing with a B/M ratio of 2:1  
MODE  
Pulling mode pin to V places the  
DD  
dialer in tone mode. Pulling mode  
pin to GND places the dialer in  
DTMF with 140 ms inter-tone  
pause. If the mode pin is left  
floating, the dialer is in pulse mode  
( 10 ppS)  
MODE  
35  
36  
39  
40  
DP  
N-channel open drain pulse dialing  
output. Flash key will cause DP to  
be active in either DTMF mode or  
pulse mode.  
DP  
DP  
Mask  
Short mute during pulse dialing  
8 (23)  
TELEFUNKEN Semiconductors  
Rev. A2, 23-Apr-97  
Preliminary Information  
U3761MB  
SDIP40 SSO44  
Symbol  
R1  
Configuration  
Function  
Keyboard input  
37  
38  
39  
40  
41  
42  
43  
44  
R1  
R2  
PD  
PD  
PD  
PD  
R2  
R3  
R4  
R3  
R4  
Keyboard Operation  
C1  
1
4
7
/T  
C2  
2
5
8
0
C3  
3
6
9
#
C4  
S
M1  
M2  
M3  
N
R1  
R2  
R3  
R4  
A
R/P  
VDD  
F1  
F2  
F3  
E
S: Store function key  
/T: and pulse-to-tone key  
M1 to M3: One-touch memory  
F1, F2, F3: Flash keys  
A: Indirect repertory dialing function key (LN 0 to 9)  
R/P: Redial and pause function key  
N: Notice function  
Normal Dialing  
OFF HOOK  
,
D1  
,
D2  
, ...,  
Dn  
1.  
2.  
3.  
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.  
Redialing  
OFF HOOK  
,
D1  
,
D2 , ..., Dn  
BUSY, Come  
ON HOOK  
,
OFF HOOK  
,
R/P  
R/P  
The  
key can execute the redial function only as the first key-in after off-hook;  
otherwise, it executes the pause function.  
TELEFUNKEN Semiconductors  
9 (23)  
Rev. A2, 23-Apr-97  
Preliminary Information  
U3761MB  
Number Store  
OFF HOOK  
,
D1  
,
D2 , ..., Dn  
,
S
,
S
,
Mn (or Ln  
)
S
1.  
2.  
If the sequence of the dialed digits D1, D2, ..., Dn has not finished  
D1, D2, ..., Dn will be stored in memory location and dialed out.  
will be ignored.  
OFF HOOK  
D1, D2, ..., Dn will be stored in memory location but will not be dialed out.  
R/P /T  
,
S
,
D1  
,
D2 , ..., Dn  
,
S
,
Mn (or Ln  
)
3.  
4.  
and  
In store mode,  
keys can be stored as a digit in memory.  
R/P  
/T  
is the pulse-to-tone function key.  
is the pause function key;  
5.  
The store mode is released after the store function is executed or when the state of the hook switch is changed.  
Reportery Dialing  
1.  
OFF HOOK  
,
Mn  
A
2.  
OFF HOOK  
,
,
Ln  
Notice (N)  
OFF HOOK  
,
D1  
,
D2 , ..., Dn  
Dn  
,
N
D1  
N
1.  
If the dialing of  
to  
is finished, pressing the  
key will cause D1 to Dn to be copied  
to the N memory.  
OFF HOOK  
,
N
2.  
D1 to Dn will be dialed out after the N key is pressed.  
Cascaded Dialing  
1.  
Normal dialing + Repertory dialing  
+
+
Normal dialing  
2.  
Repertory dialing  
Redialing  
+
Normal dialing  
Normal dialing  
3.  
4.  
+
Normal dialing + Repertory dialing  
Redialing is valid as first key-in only.  
10 (23)  
TELEFUNKEN Semiconductors  
Rev. A2, 23-Apr-97  
Preliminary Information  
U3761MB  
HKS  
KEY IN  
DP  
tKRD  
3
4
2
2
tKID  
tKID  
M B  
M B  
tIDP  
tIDP  
tIDP  
tIDP  
tPDP  
tPDP  
T/P MUTE  
MASK  
DTMF  
Low  
Oscillation  
Oscillation  
OSC  
13402  
Figure 2. Pulse mode normal dialing  
HKS  
KEY IN  
DP  
tKRD  
t<tOHD  
R/P  
tK10  
M B  
M B  
tIDP  
tIDP  
tIDP  
tPDP  
T/P MUTE  
MASK  
DTMF  
Low  
Oscillation  
OSC  
13403  
Figure 3. Pulse mode auto dialing  
TELEFUNKEN Semiconductors  
11 (23)  
Rev. A2, 23-Apr-97  
Preliminary Information  
U3761MB  
HKS  
KEY IN  
DP  
tKRD  
t tOHD  
R/P  
tK10  
M B  
M B  
tIDP  
tIDP  
tPDP  
T/P MUTE  
MASK  
DTMF  
Low  
Oscillation  
OSC  
13404  
Figure 4. Pulse mode auto dialing  
HKS  
tKRD  
KEY IN  
3
4
2
5
tKID  
DTMF  
tTD  
tITP  
tITP  
tITP  
T/P MUTE  
MASK  
DP  
High  
Oscillation  
Oscillation  
OSC  
13405  
Figure 5. DTMF mode normal dialing  
12 (23)  
TELEFUNKEN Semiconductors  
Rev. A2, 23-Apr-97  
Preliminary Information  
U3761MB  
HKS  
tKRD  
t<tOHD  
KEY IN  
R/P  
tKID  
DTMF  
tTD  
tITP  
tITP  
T/P MUTE  
MASK  
DP  
High  
Oscillation  
OSC  
13406  
Figure 6. DTMF mode auto dialing  
HKS  
tKRD  
t tOHD  
KEY IN  
R/P  
tKID  
DTMF  
tTD  
tITP  
T/P MUTE  
MASK  
DP  
High  
Oscillation  
OSC  
13407  
Figure 7. DTMF mode auto dialing  
TELEFUNKEN Semiconductors  
13 (23)  
Rev. A2, 23-Apr-97  
Preliminary Information  
U3761MB  
Access Pause  
OFF HOOK  
,
D1  
,
D2  
,
R/P  
,
D3  
, ...,  
Dn’  
1.  
2.  
The pause function can be stored in memory.  
The pause function is executed in normal dialing and redialing.  
HKS  
KEY IN  
2
R/P  
3
tKID  
tIDP  
B
B
DP  
M
M
tPDP  
tPDP  
T/P MUTE  
tP  
MASK  
DTMF  
Low  
Oscillation  
OSC  
13408  
Figure 8. Pause function  
14 (23)  
TELEFUNKEN Semiconductors  
Rev. A2, 23-Apr-97  
Preliminary Information  
U3761MB  
Pulse-to-Tone ( /T)  
OFF HOOK  
,
D1  
,
D2 , ..., Dn  
,
/T  
,
D1’  
,
D2’  
, ...,  
Dn’  
1.  
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)  
2.  
3.  
If the mode switch is set to tone mode, then the output signal will be:  
D1, D2, ..., Dn,  
(Tone)  
*
, D1’, D2’, ..., Dn’  
(Tone)  
(Tone)  
The dialer remains in tone mode when the digits have been dialed out and can be reset to pulse mode  
only by going on-hook.  
HKS  
KEY IN  
2
*/T  
3
tKID  
B
DP  
M
tIDP  
tPDP  
T/P MUTE  
tP  
MASK  
DTMF  
OSC  
Oscillation  
13409  
Figure 9. Pulse-to-tone operation  
Earth  
The Earth pin will go high 400 ms and the pause time of 1 s will be added when the Earth key is pressed. It can be stored  
as a digit in Memory and has not the first priority.  
TELEFUNKEN Semiconductors  
15 (23)  
Rev. A2, 23-Apr-97  
Preliminary Information  
U3761MB  
Flash (F1 or F2 or F3)  
OFF HOOK  
,
F
n
1.  
2.  
3.  
The dialer will execute flash break and all the flash pause time before the next digits is dialed out.  
The flash key can be stored as a digit in memory, however, only one flash will be releases to users.  
The system will return to the initial state after the flash pause time is finished.  
Low  
HKS  
KEY IN  
F
F
3
tKID  
tFB  
DP  
tFP  
tFP  
T/P MUTE  
MASK  
DTMF  
OSC  
tITP  
Oscillation  
13410  
Figure 10. Flash operation  
t
t
t
t
t
= key active in debounce  
= key release debounce  
= pre-digit pause  
= inter-digit pause  
= DTMF output duration  
t
t
t
t
= intertone pause  
KID  
KRD  
PDP  
IDP  
TD  
ITP  
FB  
FP  
P
= flash break time  
= flash pause time  
= pause time  
Absolute Maximum Ratings  
Parameters  
Line current  
DC line voltage  
Symbol  
Value  
140  
14  
Unit  
I
mA  
V
L
V
L
Junction temperature  
Ambient temperature  
Storage temperature  
T
125  
25 to +75  
55 to +150  
°C  
°C  
°C  
j
T
amb  
T
stg  
Total power dissipation, T  
= 60°C  
SSO44  
SDIP40  
P
P
0.9  
1.3  
W
W
amb  
tot  
tot  
Junction ambient  
SSO44  
SDIP40  
R
thJA  
R
thJA  
70  
50  
K/W  
K/W  
16 (23)  
TELEFUNKEN Semiconductors  
Rev. A2, 23-Apr-97  
Preliminary Information  
U3761MB  
Electrical Characteristics Speech Circuit  
Reference point Pin GND, f = 1000 Hz, 0 dBm = 775 mV  
R
= 39 / 1 W, T = 25°C, unless otherwise specified  
rms, DC amb  
Parameters  
Line voltage  
Test Conditions / Pin  
I = 5 mA  
Symbol  
Min.  
1.2  
Typ.  
Max.  
1.5  
Unit  
V
L
V
V
V
V
L
I = 20 mA  
4.0  
4.5  
6.4  
L
I = 30 mA  
L
I = 73 mA  
L
Transmit and sidetone  
Input resistance  
Gain  
R
R
45  
46.8  
–0.5  
80  
47.8  
120  
48.8  
0.5  
kΩ  
dB  
dB  
i
i
I = 20 mA, S5 = open  
G
s
L
Gain change with current  
I = 20 to 60 mA  
L
G
S
R
AGC  
= infinite  
Gain deviation  
T
= –10 to +60°C  
G
–0.5  
4.8  
0.5  
dB  
amb  
S
I = 20 mA  
L
Line-loss compensation  
Noise at line weighted  
psophometrically  
Sidetone reduction  
DTMF amplifier  
Volume range d < 5%  
DTMF output level low  
frequency group  
R
= 12 k , I = 73 mA  
G
s
–6  
15  
–7  
– 72  
dB  
dBmp  
AGC  
L
I > 20 mA, G = 48dB  
L
n
o
S
I
20 mA  
G
10  
20  
dB  
L
STA  
Single tone, I  
I = 20 mA, S5 = closed  
L
20 mA  
V
L
1.3  
–8  
dBm  
dBm  
L
V
L
–4  
3
Pre-emphasis between high  
and low level frequency  
group  
P
PRE  
= P  
– P  
P
1
dB  
HLG  
LLG,  
PRE  
S5 = closed  
Receiving amplifier  
Gain  
Gain change with current  
IL 20 mA  
G
G
3
–0.5  
5
0.5  
dB  
dB  
R
I = 20 to 60 mA  
L
R
R
R
R
AGC  
= infinite  
Gain deviation  
T
amb  
= –10 to +60°C  
G
G
–0.3  
4.7  
0.7  
dB  
I = 20 mA  
L
Line-loss compensation  
I = 73 mA  
L
–6  
–7  
dB  
Receiving noise at  
earphone weighted  
psophometrially  
I = 73 mA  
L
n
i
77.5  
71  
dBm  
Gain change when muted  
Output voltage push-pull  
I
I
20 mA  
20 mA, Z = 68 nF,  
G
24  
0.8  
29  
0.9  
34  
dB  
V
RMS  
L
L
RM  
V
RECO  
ear  
100 in series  
Ear protection differential  
I = 40 mA, V = 4 V  
,
V
1.3  
2.3  
1.6  
2.5  
V
rms  
L
gen  
rms  
ear  
Z
= 68 nF + 100  
ear  
Supply voltage (for internal use only)  
Output voltage  
Distortion at line  
VL = 0.775 Vrms  
I
20 mA dialing mode  
V
DD  
6.3  
2
V
%
L
IL = 20 mA, S5 = open  
d
t
Maximum output voltage  
swing at line  
Mute suppression transmit  
with privacy function  
IL = 20 mA,  
Vmic = 50 mVoff  
IL = 20 mA  
V
3.4  
4
Vpp  
dB  
L max  
G
SPRIV  
60  
TELEFUNKEN Semiconductors  
17 (23)  
Rev. A2, 23-Apr-97  
Preliminary Information  
U3761MB  
DC Characteristics Dialer  
V
DD2  
= 2.7 V, f  
= 3.58 MHz, all outputs unloaded, S9b  
OSC  
Parameters  
Memory rentention current HKS = 1, V  
Pre-emphases  
DTMF distortion  
DP output sink current  
Test Conditions / Pins  
Symbol  
Min.  
1
Typ.  
Max.  
0.2  
3
Unit  
A
dB  
dB  
mA  
A
= 1.0 V  
I
DD2  
MR  
Column/Row  
R = 5 k  
2
30  
d
23  
L
V
= 0.5 V  
I
0.5  
30  
PO  
PL  
Keyboard input drive  
current  
V = 0 V  
I
I
KD  
Keyboard input sink current V = 2.7 V  
Keyboard resistance  
I
200  
400  
A
k
I
KS  
5
F1, F2, F3, E  
300  
board resistance  
Mask sink / drive current  
Earth sink / drive current  
I
H/L  
0.5  
0.5  
mA  
mA  
M
I H/L  
e
AC Characteristics Dialer  
Parameters  
Keypad active in de-  
bounce  
Test Conditions / Pins  
Symbol  
t
KID  
Min.  
Typ.  
20  
Max.  
Unit  
ms  
Key release debounce  
t
20  
ms  
KRD  
Pre-digit pause  
B/M pin = floating 10 ppS  
B/M pin = low  
10 ppS  
t
t
40  
33.3  
800  
ms  
ms  
ms  
PDP  
PDP  
Inter-digit pause  
(auto dialing)  
t
IDP  
Make/break ratio  
B/M pin = floating  
B/M pin = low  
Auto dialing, MODE = V  
MODE = GND  
Auto dialing, MODE = V  
M/B  
40:60  
33:67  
87  
70  
87  
%
%
ms  
DTMF output duration  
Inter-tone pause  
t
TD  
DD  
t
ms  
DD  
ITP  
MODE = GND  
140  
Flash break time  
F1  
F2  
F3  
C connected to V  
t
FB  
98  
250  
600  
ms  
ms  
ms  
1
DD  
DD  
DD  
C connected to V  
2
C connected to V  
3
Flash pause time  
F1  
F2  
F3  
t
FP  
1
s
Pause time  
On Hook debounce time  
Earth time  
t
3.6  
150  
400  
1
s
P
t
ms  
ms  
s
ohd  
C connected to V  
t
t
4
DD  
et  
pt  
Earth pause time  
18 (23)  
TELEFUNKEN Semiconductors  
Rev. A2, 23-Apr-97  
Preliminary Information  
U3761MB  
Electrical Characteristics Tone Ringer  
f
= 4 kHz, V  
= 20 V, T  
= 25 C, reference point GND, unless otherwise specified  
RCK  
RING  
amb  
Parameters  
Supply current,  
outputs open  
Test Conditions / Pins  
Symbol  
I
RING  
Min.  
2.1  
Typ.  
Max.  
3.8  
Unit  
mA  
V
= 20 V  
RIAC  
Switch-on threshold  
Switch-off threshold  
Ringing frequency  
V
V
V
23.5  
5.6  
V
V
RIAC  
RON  
V
ROFF  
RIAC  
R = 150 k, C = 1 nF  
V
> V  
f
1H  
937  
752  
11.5  
21  
1010  
808  
12.5  
23  
1083  
868  
14.0  
Hz  
Hz  
V
pp  
ms  
RIAC  
RON  
f
1L  
Audio sequence frequency  
Output voltage swing  
Turn-off delay  
f
2
V
Ring  
= 25 V, C = 68 nF  
V
out  
out  
off  
See figure 11  
t
65  
12459  
Volt  
VRING  
0
t
t
t
VRIAC  
0
OUT  
Melody  
0
t
off  
Figure 11. Turn off delay time  
Ordering Information  
Type  
U3761MB-ASD  
Package  
SDIP40  
SSO44  
U3761MB-AFN  
U3761MB-AFNG3  
SSO44 tape and reel  
TELEFUNKEN Semiconductors  
19 (23)  
Rev. A2, 23-Apr-97  
Preliminary Information  
U3761MB  
Basic Test Circuit  
I D C  
A C  
I / O  
A C  
I / O  
I N  
T O E T S T E R  
T O E T S T E R  
12633  
20 (23)  
TELEFUNKEN Semiconductors  
Rev. A2, 23-Apr-97  
Preliminary Information  
U3761MB  
Formulas for Parameters of Elecrtrical Characteristics of Speech Circuit  
Formulas referred to the basic test circuit. If not otherwise specified switches in basic test circuit are inactive.  
Transmit gain  
VL  
VMIC  
GS  
20 log  
VMIC = 3 mV/1 kHz, S5 = open  
Receiving gain  
VRECO  
GR  
20 log  
VL  
RX-mode: VGEN = 300 mV/1 kHz, S7b  
Line loss compensation transmit  
GS  
GS(at IL  
73 mA)–GS(at IL  
20 mA)  
TX-mode: VMIC = 3 mV/1 kHz, S5 = open  
Sidetone reduction  
VL  
VRECO  
GSTA  
20 log  
(in TX–mode) GR  
TX-mode: VMIC = 3 mV/1 kHz, S5 = open  
Line loss compensation receive  
GR  
GR(at IL  
73 mA)–GR(at IL  
20 mA)  
RX-mode: VGEN = 300 mV/1 kHz, S7b  
Gain change when muted  
VRECO  
VRECO  
VL  
GRM  
20 log  
(Mute  
inactive)–20  
log  
(Mute  
active)  
VL  
VGEN = 100 mV/1 kHz, S5 = open, S8 = open  
Input impedance of microphone amplifier  
50 k  
Ri  
VL  
(s6  
closed) –1  
VL  
(S6  
open)  
TX-mode: VMIC = 3 mV/1 kHz, S5 = open  
TELEFUNKEN Semiconductors  
21 (23)  
Rev. A2, 23-Apr-97  
Preliminary Information  
U3761MB  
Packaging Information  
Package SDIP40  
Dimensions in mm  
15.34  
15.14  
37.4  
36.9  
4.9  
4.3  
13.9  
13.7  
0.7  
0.38  
0.20  
3.3  
0.53  
0.48  
17.2  
16.0  
33.782  
1.778  
technical drawings  
according to DIN  
specifications  
13027  
1
9.15  
8.65  
Package SSO44  
Dimensions in mm  
18.05  
17.80  
7.50  
7.30  
2.35  
0.3  
0.8  
0.25  
0.10  
0.25  
10.50  
10.20  
16.8  
44  
23  
technical drawings  
according to DIN  
specifications  
13040  
1
22  
22 (23)  
TELEFUNKEN Semiconductors  
Rev. A2, 23-Apr-97  
Preliminary Information  
U3761MB  
Ozone Depleting Substances Policy Statement  
It is the policy of TEMIC TELEFUNKEN microelectronic 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 TELEFUNKEN microelectronic GmbH semiconductor division 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 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 TELEFUNKEN microelectronic GmbH, P.O.B. 3535, D-74025 Heilbronn, Germany  
Telephone: 49 (0)7131 67 2831, Fax number: 49 (0)7131 67 2423  
TELEFUNKEN Semiconductors  
23 (23)  
Rev. A2, 23-Apr-97  
Preliminary Information  

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