Typical Performance Characteristics
‘‘ON’’ Resistance vs Signal
Voltage for T
A
e
25 C
‘‘ON’’ Resistance as a Function
of Temperature for
V
DD
b
V
SS
e
15V
‘‘ON’’ Resistance as a Function
of Temperature for
V
DD
b
V
SS
e
10V
‘‘ON’’ Resistance as a Function
of Temperature for
V
DD
b
V
SS
e
5V
TL F 5665 – 4
Special Considerations
In applications where separate power sources are used to
drive V
DD
and the signal input the V
DD
current capability
should exceed V
DD
R
L
(R
L
e
effective external load of the 4
CD4066BM CD4066BC bilateral switches) This provision
avoids any permanent current flow or clamp action of the
V
DD
supply when power is applied or removed from
CD4066BM CD4066BC
In certain applications the external load-resistor current
may include both V
DD
and signal-line components To avoid
drawing V
DD
current when switch current flows into termi-
nals 1 4 8 or 11 the voltage drop across the bidirectional
switch must not exceed 0 6V at T
A
s
25 C or 0 4V at
T
A
l
25 C (calculated from R
ON
values shown)
No V
DD
current will flow through R
L
if the switch current
flows into terminals 2 3 9 or 10
6
NSC [ NATIONAL SEMICONDUCTOR ]
