SL34118 Ver la hoja de datos (PDF) - System Logic Semiconductor

Número de pieza

componentes Descripción

Fabricante

SL34118

Voice Switched Speakerphone Circuit

System Logic Semiconductor 

SL34118

Pin No

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

Designation

MUT

VLC

CT

VB

CPT

TLI2

TLO2

RLO2

RLI2

RXI

RXO

TLI1

TLO1

RLO1

RLI1

CPR

GND

Description

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 90Ω.

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.

An RC this pin sets the response time for the circuit to switch modes.

An output voltage ≈VCC/2. This voltage is a system ac ground, and biases the

volume control. A filter cap is required.

An RC at this pin sets the time constant for the transmit background monitor.

Input to the transmit level detector on the mike speaker side.

Output of the transmit level detector on the mike/speaker side, and input to the

transmit background monitor.

Output of the receive level detector on the mike/speaker side.

Input to the receive level detector on the mike/speaker side.

Input to the receive attenuator and dial tone detector. Max input level is 350 mV

RMS. Input impedance is ≈10 KΩ.

Output of the receive attenuator. DC level is approximately VB.

Input to the transmit level detector on the line side.

Output of the transmit level detector on the line side.

Output of the receive level detector on the line side, and input to the receive

background monitor.

Input the receive level detector on the line side.

An RC at this pin sets the time constant for the receive background monitor.

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)

Tstg Storage Temperature Range

-0.5 toVCC +0.5 V

V

-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.

SLS

System Logic

Semiconductor

Share Link: