NJM2750
4 INPUT / 1 OUTPUT STEREO AUDIO SELECTOR
s GENERAL DESCRIPTION
The NJM2750 is 4 Input / 1 Output Stereo Audio Selector.
Based on the internal Switch OP-AMP technology, the
NJM2750 has lower Output Noise, lower Distortion and
higher Channel Separation than the ordinary Multiplexers or
Analogue Switches.
The NJM2750 is suitable for any kinds of audio
equipments, such as TV, Car Stereo, Mini-Compo and so
on.
s PACKAGE OUTLINE
NJM2750M
s FEATURES
q Operating Voltage
(4.7 to 13V)
q 4 Input / 1 Output Audio Selectors
q Dual Channel for Stereo Use
q Low Output Noise
(-110dBV typ.)
q Low Distortion
(0.005% typ.)
q Bipolar Technology
q Package Outline
(DMP16)
s BLOCK DIAGRAM
s PIN CONFIGURATION
1
16
GND
CNT1 2
15
OUTa
14
V+
13
IN3a
IN1a
IN2a
V+
3
CNT2 4
LOGIC
bias
IN4a
5
12
Vref
IN1b
6
11
OUTb
IN2b
7
10
(N.C.)
IN4b
8
9
PIN No.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
SYMBOL
IN1a
CNT1
IN2a
CNT2
IN4a
IN1b
IN2b
IN4b
IN3b
(N.C.)
OUTb
Vref
IN3a
V+
OUTa
GND
FUNCTION
Ach INPUT SELECTOR
CONTROL 1
Ach INPUT SELECTOR 2
CONTROL 2
Ach INPUT SELECTOR 4
Bch INPUT SELECTOR 1
Bch INPUT SELECTOR 2
Bch INPUT SELECTOR 4
Bch INPUT SELECTOR 3
NO CONNECT
Bch OUTPUT
REFERENCE VOLTAGE
Ach INPUT SELECTOR 3
POWER SUPPLY
Ach OUTPUT
GROUND
IN3b
-1-
NJM2750
s TERMINAL DESCRIPTION
PIN No.
SYMBLE
1
3
5
6
7
8
9
13
IN1a
IN2a
IN4a
IN1b
IN2b
IN4b
IN3b
IN3a
2
4
EQUIVALENT CIRCUIT
CNT1
CNT2
V+
VOLTAGE
NOTE
V+/2
180
IN1a
IN2a
IN3a
IN4a
IN1b
IN2b
IN3b
IN4b
100K
VREF
GND
V+
0V (GND)
180
CNT1
CNT2
100K
GND
11
15
OUTb
OUTa
V+
V+/2
OUTa
OUTb
30
GND
12
Vref
V+
V+/2
45K
30
Vref
60K
GND
14
16
V+
GND
V+
V+
0V
GND
-3-
