NJW1157
8-CHANNEL ELECTRONIC VOLUME WITH INPUT SELECTOR
s GENERAL DESCRIPTION
NJW1157 is an eight channel electronic volume IC.
It includes Input selector, tone control, volume, mute,
input selector gain control, volume output gain control
and 5 REC outputs. It’s suitable for multi-channel
audio equipments such as AV receivers and DVD
receivers. These functions are controlled by
three-wired serial data.
s FEATURES
q Operating Voltage
q Three-Wired Serial Data Control
q Input Selector (x 12)
q REC Output (x 5) with Selector
q Input Selector Gain Control
q Volume Output Gain Control
q Volume
q Tone Control
q Subwoofer output addition to L, R channel output
q Subwoofer output ON/OFF control
q Bi-CMOS Technology
q Package Outline
s PACKAGE OUTLINE
NJW1157FC2
±4.5 to ±7.5V
Gain : 0/-3/-6/-9/-12dB
Gain : 0/+3/+6/+9/+12/+15/+18dB
0 to -100dB/1dBstep, MUTE
0 to ±10dB/1dBstep
QFP100 – C2
RECB2R
RECB1R
RECB2L
RECB1L
RECA3L
RECA3R
RECA2R
RECA2L
LAIN
RAIN
CAIN
LSAIN
RSAIN
LBAIN
RBAIN
SWAIN
RECA1R
Multi-Channel Input A
RECA1L
s BLOCK DIAGRAM
Supply
Voltage
µCOM
Interface
L1IN
R1IN
Multi-channel
DCLA1 DCLA2
L2IN
SW
TONE
Volume
R2IN
L3IN
V+
GND
VLATCH
DATA
CLOCK
LOUT
TSW
DCRA1 DCRA2
SW
TONE
R3IN
ROUT
L4IN
R4IN
L5IN
COUT
Att Gain
R5IN
2 Channel Input
L6IN
R6IN
LSOUT
Att Gain
L7IN
RSOUT
R7IN
L8IN
R8IN
LBOUT
L9IN
R9IN
RBOUT
L10IN
BSW
R10IN
SSW
L11IN
SWOUT
Amp
Gain
R11IN
L12IN
FIL1_R
FIL2_R
FIL3_R
FIL4_R
FIL1_L
FIL2_L
FIL3_L
FIL4_L
REC Out Selector
SWBIN
RBBIN
LBBIN
RBBIN
LSBIN
CBIN
RBIN
LBIN
Input Selector
FRFR+
FLFL+
R12IN
Multi-Channel Input B
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