MC74HC4851A_16 Datasheet, PDF (10/16 Pages) ON Semiconductor – Analog Multiplexers/ Demultiplexers

11
A
10
B
C9
ENABLE ⁶
MC74HC4851A, MC74HC4852A
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 24. Diagram of Bipolar Coupling Mechanism
Appears if V_in exceeds V_CC, driving injection current into the substrate
Figure 25. 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
CURRENT
CONTROL
3X
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