Quadruple bilateral switches
The HEF4066B has four independent bilateral analogue
switches (transmission gates). Each switch has two
input/output terminals (Y/Z) and an active HIGH enable
input (E). When E is connected to VDD a low impedance
bidirectional path between Y and Z is established (ON
condition). When E is connected to VSS the switch is
disabled and a high impedance between Y and Z is
established (OFF condition).
The HEF4066B is pin compatible with the HEF4016B but
exhibits a much lower ON resistance. In addition the ON
resistance is relatively constant over the full input signal
Fig.1 Functional diagram.
HEF4066BP(N): 14-lead DIL; plastic (SOT27-1)
HEF4066BD(F): 14-lead DIL; ceramic (cerdip)
HEF4066BT(D): 14-lead SO; plastic (SOT108-1)
( ): Package Designator North America
Fig.2 Pinning diagram.
E0 to E3
Y0 to Y3
Z0 to Z3
An example of application for the HEF4066B is:
• Analogue and digital switching
Fig.3 Schematic diagram (one switch).