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HCF4066B Datasheet(PDF) 2 Page - STMicroelectronics

Part No. HCF4066B
Description  QUAD BILATERAL SWITCH FOR TRANSMISSION OR MULTIPLEXING OF ANALOG OR DIGITAL SIGNALS
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

HCF4066B Datasheet(HTML) 2 Page - STMicroelectronics

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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 input when the switch is ON or to VSS when
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
VSS
Negative Supply Voltage
14
VDD
Positive Supply Voltage
CONTROL
SWITCH FUNCTION
HON
L
OFF


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