SA3375 Datasheet, PDF (3/5 Pages) Silan Microelectronics Joint-stock – PLL FM MULTIPLEXER STEREO DEMODULATOR

SA3375
PIN DESCRIPTIONS
Pin no.
1
2
3
4
5
6
7
8
9
10
11, 12
13
14, 15
16
Pin name
VCC
IN
SEP Adj
HC constant
LOUT
ROUT
HCC
SNC
GND
STLED
FILTER1
CLP
FILTER2
OSC
Description
Power supply.
Composite input
Connected to semi-fixed resister
Connecter to capacitor
Out of L channel
Out of R channel
High –cut control
Stereo noise control
Ground
Stereo lamp
Filter of pilot detector
Pilot cancel adjust
Filter of phase comparator
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) ˈVCO will be stopped and SA3375 will
work in monaural mode.
HANGZHOU SILAN MICROELECTRONICS CO.,LTD
Http: www.silan.com.cn
Rev: 1.0 2005.02.03
Page 3 of 5