View m51132fp datasheet:

M51132FP IL08 ********** 2-CHANNEL ELECTRONIC LEVEL CONTROL —TOP VIEW— 15 16 IN1 OUT1 1 16 OUT1 11 10 V OUT REF IN2 OUT2 FILTER 2 15 IN1 5 LEVEL/LEVEL1 7 BAL/LEVEL2 3 NC VCC (+12V) 14 9 MODE SEL 4 GND NC 13 2 FILTER 1 VREF OUT LEVEL/LEVEL1 5 NC 12 6 REDUCE 8 PASS/VCA REDUCE 6 11 IN 2 BAL/LEVEL2 7 10 OUT 2 BAL/LEVEL2 ; BALANCE/LEVEL2 CONTROL FILTER ; FILTER MODE PASS/VCA 8 9 IN1 ; INPUT 1 SEL IN2 ; INPUT 2 MODE SEL ; MODE SELECT OUT1 ; OUTPUT 1 OUT2 ; OUTPUT 2 PASS/VCA ; PASS/VCA CONTROL SWITCH REDUCE ; SWITCHING NOISE REDUCE LEVEL/LEVEL1 ; LEVEL/LEVEL1 CONTROL V REF OUT ; REFERENCE VOLTAGE OUTPUT OUTPUT 14 VCA1 BUFFER 1 Vcc 16 OUT1 1 VREF OUT REG 15 IN1 2 FILTER INPUT BUFFER 1 4 GND 5 CONTROL INPUT LEVEL/LEVEL1 7 VOLTAGE BUFFER 2