LA8638V Просмотр технического описания (PDF) - SANYO -> Panasonic

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LA8638V

Low-voltage Compander IC for Cordless Telephones

SANYO -> Panasonic 

Pin Descriptions

Pin Number

1

Pin Name

GND

Pin Voltage

2

1/2 VCC

VCC/2

29

VREF

VCC/2

3

CMP-NF

VCC/2

LA8638V

Equivalent Circuit

4

DT-VREF

1.25 V

5

RX-IN

1.25 V power

supply

6

RX-FIL-OUT

1.25 V

7

EXP-IN

VCC/2

Indeterminate

8

EXP-RCT (when there is

no signal)

9

RX-ATT-ADJ

0.03 V

10

RX-OUT

VCC/2

Description

Ground for all circuits except BTL amplifier

Resistance voltage divider pin

Reference voltage for all circuits except

receiver block

AC feedback control for compressor's

summing amplifier DC gain: 1 AC gain:

Infinite

Reference voltage for receiver block This

supplies the bias voltage for pin 5.

Filter buffer input

Filter buffer output

Expander input. Voltage-current converter

input. Full-wave rectifier input.

Full-wave rectifier output for expander block

(AC smoothing)

Pin for setting attenuation for receiver output

level switching

Receiver block output

Continued on next page.

No. 5776-9/16

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