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| CD4066B_14 Datasheet, PDF (12/26 Pages) Texas Instruments – CMOS QUAD BILATERAL SWITCH | |||
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CD4066B
CMOS QUAD BILATERAL SWITCH
SCHS051D â NOVEMBER 1998 â REVISED SEPTEMBER 2003
APPLICATION INFORMATION
In applications that employ separate power sources to drive VDD and the signal inputs, the VDD current capability
should exceed VDD/RL (RL = effective external load of the four CD4066B bilateral switches). This provision avoids
any permanent current flow or clamp action on the VDD supply when power is applied or removed from the CD4066B.
In certain applications, the external load-resistor current can include both VDD and signal-line components. To avoid
drawing VDD current when switch current flows into terminals 1, 4, 8, or 11, the voltage drop across the bidirectional
switch must not exceed 0.8 V (calculated from ron values shown).
No VDD current will flow through RL if the switch current flows into terminals 2, 3, 9, or 10.
12
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