CD4066B
CMOS QUAD BILATERAL SWITCH
SCHS051D – NOVEMBER 1998 – REVISED SEPTEMBER 2003
APPLICATION INFORMATION
In applications that employ separate power sources to drive V
and the signal inputs, the V
current capability
DD
DD
should exceed V /R (R = effective external load of the four CD4066B bilateral switches). This provision avoids
DD
L
L
any permanent current flow or clamp action on the V supply when power is applied or removed from the CD4066B.
DD
In certain applications, the external load-resistor current can include both V
and signal-line components. To avoid
DD
drawing V
current when switch current flows into terminals 1, 4, 8, or 11, the voltage drop across the bidirectional
DD
switch must not exceed 0.8 V (calculated from r values shown).
on
No V
current will flow through R if the switch current flows into terminals 2, 3, 9, or 10.
L
DD
12
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
TI [ TEXAS INSTRUMENTS ]
