MC74HCT4851A Datasheet, PDF (9/13 Pages) ON Semiconductor – Analog Multiplexers/ Demultiplexers with Injection Current Effect Control with LSTTL Compatible Inputs

MC74HCT4851A
Disabled Analog Mux Input
V_in > V_CC + 0.7V
Gate = V_CC
(Disabled)
P+
P+
+
+
+
N - Substrate (on V_CC potential)
Common Analog Output
V_out > V_CC
Figure 18. Diagram of Bipolar Coupling Mechanism
Appears if V_in exceeds V_CC, driving injection current into the substrate
11
A
10
B
9
C
6
ENABLE
Figure 19. Function Diagram, HC4851A
INJECTION
CURRENT
CONTROL
13
X0
INJECTION
CURRENT
CONTROL
14
X1
INJECTION
CURRENT
CONTROL
15
X2
INJECTION
CURRENT
CONTROL
12
X3
INJECTION
CURRENT
CONTROL
1
X4
INJECTION
CURRENT
CONTROL
5
X5
INJECTION
CURRENT
CONTROL
2
X6
INJECTION
CURRENT
CONTROL
4
X7
INJECTION ₃
CURRENT
X
CONTROL
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