U3760MB-MFNG3 [TEMIC]
Low-Voltage Standard Telephone Circuit;
| 型号： | U3760MB-MFNG3 |
| 厂家： | 
TEMIC SEMICONDUCTORS |
| 描述： | Low-Voltage Standard Telephone Circuit 电信 光电二极管 电信集成电路 |
| 文件： | 总19页 (文件大小：318K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
U3760MB
Low-Voltage Standard Telephone Circuit
Description
TEMIC’s low-voltage telephone circuit, U3760MB, Electrostatic sensitive device.
performs all the speech and line interface functions Observe precautions for handling.
required in an electronic telephone set tone ringer, pulse
and DTMF dialing with redial.
Features
Speech Circuit
Adjustable dc characteristic
Selectable flashing duration by key pad
Pause function
Symmetrical input of microphone amplifier
Receiving amplifier for dynamic or piezo-electric
earpieces
Last number redial up to 32 digits
Standard low-cost 3.58-MHz crystal or ceramic
resonator
Automatic line-loss compensation
Dialer
Tone Ringer
Two-tone ringer
Adjustable volume
RC oscillator
DTMF / pulse switchable
Pulse dialing 66/33 or 60/40 for 10 ppS and 20 ppS or
DTMF dialing selectable by pins
Key tone
Adjustable threshold
Benefits
Low number of external components
One IC for all standards
High quality through one-IC solution
Ordering Information
Extended Type Number
U3760MB-MSD
U3760MB-MFN
U3760MB-MFNG3
Package
SDIP40
SSO44
SSO44
Remarks
Taped and reeled
Rev. A3, 19-Feb-98
1 (19)
U3760MB
Block Diagram / Applications
470
Figure 1.
2 (19)
Rev. A3, 19-Feb-98
U3760MB
SDIP40
SSO44
C1
C2
1
2
3
4
5
6
7
8
9
44
43
42
41
40
39
38
37
R4
R3
R2
R1
n.c.
C1
C2
C3
KT
XT
1
2
3
4
5
6
7
8
9
40
39
38
37
36
35
34
33
R4
R3
R2
R1
C3
n.c.
n.c.
n.c.
KT
DP
DP
XT
MODE
MODE
BM
MFO
BM
XT
XT
HKS
GND 2
GND 1
36
35
34
33
32
31
30
29
28
27
26
25
HKS
n.c.
VDD 2
32
31
30
29
28
27
26
25
24
23
22
21
MFO 10
VDD 1
OUT
MIC 1 10
VDD 2
GND 2 11
MIC 2
MICO
VL
11
12
13
14
U3760MB
GND 1
MIC 1
VDD 1
OUT
12
13
U3760MB
RCK
VRING
VRIAC
AGC
MIC 2 14
RCK
RDC
MICO
15
VRING
VRIAC
AGC
n.c. 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
10181
RECIN
22
10180
Rev. A3, 19-Feb-98
3 (19)
U3760MB
Pin Description
PD means protection device
SDIP40 SSO44
Symbol
Function
Keyboard input
Configuration
1
2
3
1
2
3
C1
C2
C3
C1
PD
PD
PD
C2
C3
15
4
4, 5,
6, 35
n.c.
KT
Not connected
7
Key tone signal output generated
for all keys in pulse dialing mode
(except Flash + Redial) with a fre-
quency of about 1240 Hz and dura-
tion about 50 ms
KT
5
6
7
8
9
XT
XT
A built-in inverter provides
oscillation with an inexpensive
3.579545-MHz crystal or ceramic
resonator
XT
PD
PD
XT
40P
40P
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
8
12
11
GND 1 Ground 1 connected with ground 2
GND 2
4 (19)
Rev. A3, 19-Feb-98
U3760MB
SDIP40 SSO44
Symbol
MIC 1
Function
Configuration
10
11
12
13
14
15
Inverting input of microphone
amplifier
VI
1V
50K
50K
PD
MIC1
MIC2
MIC 2
MICO
Non-inverting input of microphone
amplifier
1V
VI
PD
VI
Transmit pre-amp output which is
normally capacitively coupled to
Pin TIN
1V
16K
MICO
PD
13
14
16
17
VL
Positive supply voltage input to the
device. The current through this
pin is modulated by the transmit
signal.
VL
16V
PD
RDC
PD
RDC
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 is 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 Ω for 600-
input impedance or 1.2 kΩ for a
900-Ω input impedance.
16V
PD
Rev. A3, 19-Feb-98
5 (19)
U3760MB
SDIP40 SSO44
Symbol
Function
Configuration
VBG
30K
18
20
MUTE Pin for testing
MUTE
MUTE
6.7V
PD
VL
19
21
VBG
Pin for test mode
VBG
6.7V
PD
20
22
RECIN Receive amplifier input. The
receiving amplification is regulated
by an AGC.
60K
RECIN
VL
22
21
23
24
23
25
RECO1 Output of the receive amplifier.
Dynamic transducers with a
60K
1V
minimum impedance of 100 can
RECO2
RECO1
be directly driven by these outputs.
RECO2
6.7V
PD
VI
PRIVACY Input for handset mute
40K
0.6V
6V
6V
PRIVACY
PD
24
25
26
27
ST
The output of the sidetone
cancellation signal, which requires
a balanced impedance of 8 to
10 times the subscriber’s 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
27
28
29
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
VRIAC Ringing supply
70K
10K
VRIAC
50V
PD
6 (19)
Rev. A3, 19-Feb-98
U3760MB
SDIP40 SSO44
Symbol
Function
Configuration
28
30
VRING DC supply voltage for the tone
ringer is limited to 30 V with
integrated Z-diode.
VRING
OUT
200
30V
50V
6.5K
3.4V
PD
PD
29
30
31
32
RCK
OUT
RC clock oscillator for ringer
0.8V
RCK
VRING
OUT
6V
6V
PD
Buzzer output
200
30V
6.5K
PD
PD
50V
VL
31
33
VDD 1 Supply output of dialer section
VDD 2 Supply input of dialer section
6V
VDD1
6V
PD
32
33
34
36
VDD2
PD
HKS
BM
Hook switch input.
HKS = 1: On-hook state. Chip in
sleep mode, no operation.
HKS = 0: Off-hook state. Chip en-
able for normal operation.
HKS
B/M
PD
PD
34
35
37
38
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
pulse mode (20 ppS). If the mode
pin is left floating, the dialer is in
pulse mode ( 10 ppS)
MODE
36
39
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
Rev. A3, 19-Feb-98
7 (19)
U3760MB
SDIP40 SSO44
Symbol
Function
Keyboard input
Configuration
37
38
39
40
41
42
43
44
R1
R2
R3
R4
R1
R2
PD
PD
PD
PD
R3
R4
Keyboard Operation
C1
1
4
7
/T
C2
2
5
8
0
C3
3
6
9
#
F1
F2
F3
R1
R2
R3
R4
R/P
/T: and pulse-to-tone key
R/P: Redial and pause function key
F1, F2, F3: Flash keys
Normal Dialing
OFF HOOK
,
D1
,
D2
, ...,
Dn
1.
2.
D1, D2, ..., Dn will be dialed out.
Dialing length is unlimited, but redial is inhibited if length oversteps 32 digits.
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.
8 (19)
Rev. A3, 19-Feb-98
U3760MB
10626
HKS
KEY IN
DP
3
2
R/P
t
t
t
PDP
KID
KID
tIDP
tIDP
tB
t
PDP
t
PDP
tM
MUTE
KT
LOW
MFO
Oscillation
Normal dialing
Oscillation
OSC
Auto dialing
ON HOOK OFF HOOK
Figure 2. Pulse mode
10627
HKS
KEY IN
t
t
t
t
KRD
KID
KID
KRD
t
ITP
MFO
t
TD
t
t
ITP
ITP
MUTE
LOW
KT
DP
HIGH
Oscillation
Oscillation
OSC
Figure 3. DTMF mode normal dialing
Rev. A3, 19-Feb-98
9 (19)
U3760MB
10628
HKS
R/P
KEY IN
t
KID
MFO
t
TD
t
t
ITP
ITP
MUTE
LOW
KT
DP
HIGH
Oscillation
OSC
Figure 4. DTMF auto dialing
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.
10629
HKS
R/P
4
2
2
KEY IN
t
KID
M
t
DP
t
t
IDP
IDP
t
t
IDP
t
PDP
PDP
B
t
M
MUTE
t
P
KT
LOW
MFO
OSC
Oscillation
Figure 5. Pause function
10 (19)
Rev. A3, 19-Feb-98
U3760MB
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
10630
*/T
4
2
8
KEY IN
t
KID
DP
t
t
IDP
IDP
t
t
B
PDP
t
M
MUTE
t
P
KT
MFO
Oscillation
OSC
Figure 6. Pulse-to-tone operation
Rev. A3, 19-Feb-98
11 (19)
U3760MB
Flash (F1 or F2 or F3)
OFF HOOK
,
F
n
1.
2.
The flash key cannot be stored as a digit in memory. The flash key has first priority among the keyboard
functions.
The system will return to the initial state after the flash pause time has elapsed.
OFF HOOK
,
F
,
,
D1
D2
,
,
D2
,
,
D3
D3
, ...,
, ...,
Dn
Dn
n
LNB = D1, D2, D3, ..., Dn
OFF HOOK
,
D1
F
n
LNB = D3, ..., Dn
10631
HKS
KEY IN
F
4
t
KID
DP
t
FB
t
FP
MFO
t
TD
t
ITP
MUTE
LOW
KT
Oscillation
OSC
Figure 7. 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
= flash break time
= flash pause time
= pause time
KID
KRD
PDP
IDP
TD
ITP
FB
FP
P
12 (19)
Rev. A3, 19-Feb-98
U3760MB
Absolute Maximum Ratings
Parameters
Line current
DC line voltage
Symbol
Value
Unit
mA
V
I
140
14
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
amb
SSO44
SDIP40
P
tot
0.9
1.3
W
Junction ambient
SSO44
SDIP40
R
thJA
70
50
k/W
Electrical Characteristics Speech Circuit
Reference point Pin GND, f = 1000 Hz, 0 dBm = 775 mV
R
= 39 Ω / 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
–4.8
80
47.8
–6
120
48.8
–7
kΩ
dB
dB
i
i
I = 20 mA, S5 = open
G
s
L
Line-loss compensation
R
AGC
= 12 k , I = 73 mA
G
s
L
Noise at line weighted
psophometrically
I > 20 mA, G = 48dB
n
o
– 72
dBmp
L
S
Sidetone reduction
DTMF amplifier
Volume range d < 5%
DTMF output level low
frequency group
Preemphasis between high-
and low-level frequency
group
I
20 mA
G
10
15
20
dB
L
STA
Single tone, I
I = 20 mA, S5 = closed
20 mA
V
V
1.3
–8
dBm
dBm
L
L
–4
3
L
L
P
= P
– P
P
PRE
1
dB
PRE
HLG
LLG,
S5 = closed
Receiving amplifier
Gain
Line-loss compensation
IL 20 mA
I = 73 mA
L
G
G
3
–4.7
5
–7
dB
dB
R
–6
R
Receiving noise at ear-
phone weighted psophome-
trially
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
Supply voltage (for internal use only)
Output voltage
I
20 mA dialing mode
V
DD 1
2.3
6.3
V
L
Rev. A3, 19-Feb-98
13 (19)
U3760MB
DC Characteristics Dialer
V
DD2
= 2.7 V, f
= 3.58 MHz, all outputs unloaded, S9b
OSC
Parameters
Memory retention current
Preemphases
DTMF distortion
DP output sink current
Test Conditions / Pins
Symbol
Min.
1
Typ.
Max.
0.2
3
Unit
A
dB
dB
mA
A
HKS = 1, V
= 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
Key tone output current
Key tone frequency
1
1240
mA
Hz
t = 50 ms
AC Characteristics Dialer
Parameters
Keypad active in debounce
Key release debounce
Pre-digit pause
Test Conditions / Pins
Symbol
Min.
Typ.
20
20
40
33.3
800
Max.
Unit
ms
ms
ms
ms
ms
ms
%
t
KID
t
KRD
B/M pin = floating 10 ppS
B/M pin = low
10 ppS
t
t
PDP
PDP
Inter-digit pause
(auto dialing)
Make/break ratio
t
t
IDP
IDP
20 ppS
500
B/M pin = floating
B/M pin = low
Auto dialing
M/B
40:60
33:67
87
%
ms
ms
DTMF output duration
Inter-tone pause
t
TD
Auto dialing
t
87
ITP
Flash break time
F1
F2
F3
R grounded
t
FB
94
250
600
ms
ms
ms
1
R grounded
2
R grounded
3
Flash pause time
F1
F2
F3
t
s
s
s
FP
3.6
3.6
Pause time
t
s
P
14 (19)
Rev. A3, 19-Feb-98
U3760MB
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
Min.
2.1
Typ.
Max.
3.8
Unit
mA
V
= 20 V
I
RIAC
RING
Switch-on threshold
Switch-off threshold
Ringing frequency
V
V
V
23.5
5.6
V
V
RIAC
Ron
V
Roff
RIAC
R = 150 kΩ, C = 1 nF
> V
V
RIAC
f
1H
f
937
752
1010
808
1083
868
Hz
Hz
RON
1L
Audio sequence frequency
Turn-off delay
f
t
off
11.5
12.5
65
14.0
Hz
ms
2
See figure 8
12459
Volt
VRING
0
t
t
t
VRIAC
0
OUT
Melody
0
t
off
Figure 8. Turn off delay time
Rev. A3, 19-Feb-98
15 (19)
a
b
To tester
To tester
VMIC
S7
VGEN
100 mV
VGEN
300 mV / 1 kHz
100n
S5
100
VDD
S9
8.2k
10k
1
220
25k
25k
600
a
IL
220n
S8
S6
MIC2 MFO
b
VL
VDD2
BM KT
MODE
VDD1 MIC1
MICO TIN
1.5k
DP
VL
ST
I/O
IN
HKS
13V
IN
4.7k
Clock
2.2n
XT
XT
1
S11
47n
620
RECIN
VI
3.58 MHz
RECO1
IN
IN
IN
C1
C2
C3
R1
R2
R3
R4
100
2.2
VRECO
U3760MB
IN
IN
IN
IN
RECO2
330
12k
39
AGC
RDC
I/O
MUTE
S1
VBG
PRIVACY
VRING
47n
VRING
VRIAC
RCK
VRIAC
1n
GND2
GND1
OUT
THA
68n
150k
U3760MB
Formulas for Parameters of Electrical Characteristics of Speech Circuit
Formulas refer 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
Rev. A3, 19-Feb-98
17 (19)
U3760MB
Package 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
18 (19)
Rev. A3, 19-Feb-98
U3760MB
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. A3, 19-Feb-98
19 (19)
相关型号：
©2020 ICPDF网 联系我们和版权申明