1
Standard ICs
Quad 2-channel analog multiplexer /
demultiplexer
BU4551B / BU4551BF / BU4551BFV
The BU4551B, BU4551BF, and BU4551BFV are multiplexers / demultiplexers capable of selecting and combining
analog signals and digital signals with a configuration of 2 ch · 4.
Control signals are used to turn on the switch of the corresponding channel. In addition, even if the logical amplitude
(VDD-VSS) of the control signal is low, signals with a large amplitude (VDD-VEE) can be switched.
In addition, as each switch has a low ON resistance, it can be connected to a low impedance circuit.
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Logic circuit diagram
(16)VDD
(8)VSS
(7)VEE
(15)W0
(1)W1
(2)X0
(3)X1
(6)Y0
(10)Y1
(11)Z0
(12)Z1
(9)CONT
(5)
(13)
(4)
(14)
Y
Z
X
W
Level
Converter
Control
•
Truth table
CONTROL ON
0W0
1W1
X0 Y0 Z0
X1 Y1 Z1
•
Block diagram
W1 1
X0 2
X1 3
X 4
Y 5
Y0 6
VEE 7
VSS 8
16
15
14
13
12
11
10
9
VDD
W0
W
Z
Z1
Z0
Y1
CONTROL
W1
CONTROL
X0
X1
X
Y
Y0
VEE
W0
W
Z
Z1
Z0
Y1