SA3375

HANGZHOU SILAN MICROELECTRONICS CO.,LTD

Rev: 1.0

2005.02.03

Http: www.silan.com.cn

Page 3 of 5

PIN DESCRIPTIONS

Pin no.

Pin name

Description

1

Power supply.

2

IN

Composite input

3

SEP Adj

Connected to semi-fixed resister

4

HC constant

Connecter to capacitor

5

Out of L channel

6

Out of R channel

7

HCC

High –cut control

8

SNC

Stereo noise control

9

GND

Ground

10

STLED

Stereo lamp

11, 12

FILTER1

Filter of pilot detector

13

CLP

Pilot cancel adjust

14, 15

FILTER2

Filter of phase comparator

16

OSC

VCO OSC

FUNCTION DESCRIPTION

1. SNC and HCC

The SA3375 has SNC (stereo noise control) and HCC (high-cut control) terminals for improving S/N ratios

when operating in weak radio fields.

2. Pilot canceling circuit

Canceling signal is a sawtooth wave obtained by integrating a square wave that is proportionate in amplitude to

pilot level with C and R.

3. Separation adjustments

The SA3375 by itself exhibits separation only in a 25 to 30 dB range. If a phase correction circuit is provided in

the SA3375 input circuit, it can exhibit intrinsic separation characteristics, typically 50 dB.

4. VCO stopped

When applying a voltage not less than 7 V to the HCC terminal (pin 7)

VCO will be stopped and SA3375 will

work in monaural mode.