la2657m Sanyo Semiconductor Corporation, la2657m Datasheet - Page 5

• Manufacturer Part Number: la2657m
• Description: Car Audio Electronic Volume And Tone Control Ic With On-chip Bbe Sound Processor
• Manufacturer: Sanyo Semiconductor Corporation

BBE Block Pin Functions
Pin No.
21
22
23
24
25
44
27
43
28
42
29
41
30
40
V CC
VREF
BBE On/Off
control
GND
INPUT (R)
INPUT (L)
BPF-LP (R)
BPF-LP (L)
BPF-OUT (R)
BPF-OUT (L)
HPF-OUT (R)
HPF-OUT (L)
LPF (R)
LPF (L)
Pin
Pin voltage
0.5V CC
VREF
VREF
VREF
VREF
VREF
V CC
0
0
Reference voltage
The BBE function will be on when a 3V level is applied.
This voltage must not be applied when V CC is not applied.
Input pins
Bandpass filter capacitor connection
Amplifier inverting input
Bandpass filter output
High-pass filter output
NF resistor = 21.5kΩ
Low-pass filter capacitor connection
Amplifier inverting input
LA2657M
Description
25
44
22
27
43
23
30
40
Equivalent circuit
V CC
Continued on next page.
28
29
41
42
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