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PDF U3761MB-AFN Data sheet ( Hoja de datos )
| Número de pieza | U3761MB-AFN | |
| Descripción | Low Voltage Standard Telephone Circuit with 13 Memories | |
| Fabricantes | TEMIC Semiconductors | |
| Logotipo |  |
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U3761MB
Low Voltage Standard Telephone Circuit with 13 Memories
Description
TEMIC’s low voltage telephone circuit, U3761MB
performs all the speech and line interface functions
required in an electronic telephone set, the tone ringer, the
pulse and DTMF dialing with redial, notice function, and
13 memories.
Features
Speech Circuit
D Adjustable DC characteristic
D Symmetrical input of microphone amplifier
D Receiving amplifier for dynamic or
piezo-electric earpieces
D Automatic line loss compensation
Dialer
D DTMF / pulse switchable
D Pulse dialling 66/33 or 60/40 or DTMF dialling
selectable by pin
D Selectable flashing duration by key pad
D Pause function
D Last number redial up to 32 digits
D Three by 32 digits direct (one touch) memory
D Ten by 16 digits indirect (two touch) memory
D Notice function up to 32 digits
D Standard low-cost crystal 3.57 MHz or
ceramic resonator
Tone Ringer
D 2 Tone ringer
D Adjustable volume
D RC oscillator
D Adjustable threshold
Benefits
D Low number of external components
D High quality through one IC solution
TELEFUNKEN Semiconductors
Rev. A2, 23-Apr-97
Preliminary Information
1 (23)
1 page  
U3761MB
SDIP40 SSO44 Symbol
10 13 MIC 1
11 14 MIC 2
Configuration
MIC1
MIC2
1V
50K
50K
1V
MIC1
MIC2
1V
50K
50K
1V
ÊVI
PD
ÊÊÊVI
PD
ÊÊVI
PD
ÊÊVI
Function
Inverting input of microphone
amplifier
Non-inverting input of microphone
amplifier
12 15 MICO
MICO
PD
ÊVI
Ê1V
Ê ÊÊ16K
Transmit pre-amp output which is
normally capacitively coupled to
Pin TIN
13 16
PD
VL
VL
16V
PD
RDC
Positive supply voltage input to the
device. The current through this
pin is modulated by the transmit
signal.
PD
TELEFUNKEN Semiconductors
Rev. A2, 23-Apr-97
Preliminary Information
5 (23)
5 Page 
HKS
KEY IN
DP
T/P MUTE
3
tKID
4
MB
tIDP tPDP
U3761MB
2
MB
tIDP
tIDP
tKRD
2
tKID
tPDP
tIDP
MASK
DTMF
OSC
Low
Oscillation
Figure 2. Pulse mode normal dialing
Oscillation
13402
HKS
KEY IN
DP
T/P MUTE
MASK
DTMF
OSC
tKRD
R/P
tK10
MB
tPDP
t<tOHD
MB
tIDP
tIDP
tIDP
Low
Oscillation
Figure 3. Pulse mode auto dialing
13403
TELEFUNKEN Semiconductors
Rev. A2, 23-Apr-97
Preliminary Information
11 (23)
11 Page | ||
| Páginas | Total 23 Páginas | |
| PDF Descargar | [ Datasheet U3761MB-AFN.PDF ] | |
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