HCF4066B

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the ON resistance is relatively constant over the

full input signal range. The HCF4066B consists of

four independent bilateral switches. A single

control signal is required per switch. Both the p

and n device in a given switch are biased ON or

OFF simultaneously by the control signal. As

shown in schematic diagram , the well of the

n-channel device on each switch is either tied to

the switch is OFF. This configuration eliminates

the variation of the switch-transistor threshold

voltage with input signal, and thus keeps the ON

resistance low over the full operating signal range.

The advantages over single channel switches

include peak input signal voltage swings equal to

the full supply voltage, and more constant ON

impedance over the input signal range. For

sample and hold applications, however, the

HCF4016B is recommended.

INPUT EQUIVALENT CIRCUIT

PIN DESCRIPTION

TRUTH TABLE

SCHEMATIC DIAGRAM (1 OF 4 IDENTICAL SWITCHES AND ITS ASSOCIATED CONTROL

CIRCUITY)

PIN No

SYMBOL

NAME AND FUNCTION

1, 4, 8, 11

A to D I/O

Independent Inputs/Out-

puts

2, 3, 9, 10

A to D O/I

Independent Outputs/

Inputs

13, 5, 6, 12

CONTROL

AtoD

Enable Inputs

7

Negative Supply Voltage

14

Positive Supply Voltage

CONTROL

SWITCH FUNCTION

HON

L

OFF