Audio ICs
Pin No. Pin name Pin voltage
34
SI
−
Equivalent circuit
VCC
Vref
GND
VCC
33
STEPC
−
GND
36
A
VCC
Vref
37
B
−
38
C
GND
VCC
39
BPOUT
−
30k
GND
VCC
22k
40
BPNF
VCC/2
GND
BH3874AKS2
Pin description
A pin for inputting a serial data.
Time constant attachment for
switching shock protection.
A pin for inputting a parallel data.
A pin for outputting a spectrum
analyzer B.P.F..
A pin for adjusting gain of
non-inverting amplifier in
spectrum analyzer.