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SL34118D Datasheet(PDF) 8 Page - System Logic Semiconductor

Part # SL34118D
Description  Voice Switched Speakerphone Circuit
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Manufacturer  SLS [System Logic Semiconductor]
Direct Link  http://www.slsemicon.co.kr/e_index.htm
Logo SLS - System Logic Semiconductor

SL34118D Datasheet(HTML) 8 Page - System Logic Semiconductor

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SL34118
System Logic
Semiconductor
SLS
Pin No
Designation
Description
12
MUT
Mute input. A logic low (<0.8 V) sets normal operation. A logic high (>2.0 V) mutes
the microphone amplifier without affecting the rest of the circuit. Input impedance is
nominally 90
Ω.
13
VLC
Volume control input. When VLC = VB, the receive attenuator is at maximum gain
when in the receive mode. When VLC = 0.3 VB, the receive gain is down 35 dB.
Does not affect the transmit mode.
14
CT
An RC this pin sets the response time for the circuit to switch modes.
15
VB
An output voltage
≈V
CC/2. This voltage is a system ac ground, and biases the
volume control. A filter cap is required.
16
CPT
An RC at this pin sets the time constant for the transmit background monitor.
17
TLI2
Input to the transmit level detector on the mike speaker side.
18
TLO2
Output of the transmit level detector on the mike/speaker side, and input to the
transmit background monitor.
19
RLO2
Output of the receive level detector on the mike/speaker side.
20
RLI2
Input to the receive level detector on the mike/speaker side.
21
RXI
Input to the receive attenuator and dial tone detector. Max input level is 350 mV
RMS. Input impedance is
≈10 KΩ.
22
RXO
Output of the receive attenuator. DC level is approximately VB.
23
TLI1
Input to the transmit level detector on the line side.
24
TLO1
Output of the transmit level detector on the line side.
25
RLO1
Output of the receive level detector on the line side, and input to the receive
background monitor.
26
RLI1
Input the receive level detector on the line side.
27
CPR
An RC at this pin sets the time constant for the receive background monitor.
28
GND
Ground pin for the entire IC.
MAXIMUM RATINGS
*
Symbol
Parameter
Value
Unit
VCC
Supply Voltage (Pin 14)
-1.0 to +7.0
V
VIN
Input Voltage at CD(Pin 3), MUT (Pin 12)
-1.0 toVCC +1.0 V
V
VIN
Input Voltage at VLC (Pin 13)
-1.0 toVCC +0.5 V
V
VIN
Input Voltage at TXI(Pin 9), RXI (Pin 21), FI (Pin 2)
-0.5 toVCC +0.5 V
V
Tstg
Storage Temperature Range
-65 to +150
°C
* Maximum Ratings are those values beyond which damage to the device may occur.
Functional operation should be restricted to the Recommended Operating Conditions.


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