SA3370 Datasheet, PDF (3/4 Pages) Silan Microelectronics Joint-stock – PLL FM MULTIPLEXER STEREO DEMODULATOR

SA3370
(Continued)
Pin no.
4
5
6
7
8
9
10
11, 12
13
14, 15
16
Pin name
HC constant
LOUT
ROUT
HCC
SNC
GND
STLED
Filter1
FFOUT
Filter2
OSC
Description
High cut constant
Left channel output
Right channel output
When a voltage of 7.5V or higher is applied to this pin, VCO stopped
Forced monaural mode when this pin is connected to ground
Ground
Open-collector output can directly drive LED
Pilot detector low-pass filter
19KHz out
Ripple Filter
Connected a semi-fixed resister
FUNCTION DESCRIPTIONS
1. SNC (stereo noise control) and HCC (high-cut control)
The SA3370 has SNC and HCC terminals for improved S/N ratios when operating in weak radio fields. By
adjusting.
The S/N ratios will be improved through the SNC (stereo noise control) and HCC (high-cut control) terminals.
2. Muting function
Muting in the neighborhood of 37dB are feasible by utilizing HCC functions as muting functions.
3. VCO stopped
When applying a voltage not less than 7V to the HCC terminal, VCO will be stopped and the circuit will work in
monaural mode.
4. Separation control
The separation of SA3370 can be changed by the external semi-resistor.
TEST CIRCUIT
HANGZHOU SILAN MICROELECTRONICS CO.,LTD
Http: www.silan.com.cn
Rev: 1.0 2005.02.03
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