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8

PS8184A

10/15/98

PS4066/PS4066A

Low-Cost, Quad, SPST, CMOS Analog Switches

Proper power-supply sequencing is recommended for all CMOS

devices. Do not exceed the absolute maximum ratings, because

stresses beyond the listed ratings may cause permanent damage to

the devices. Always sequence V+ on first, and then the logic

inputs. If power-supply sequencing is not possible, add a small

signal diode or current limiting resistor in series with the supply

pin for overvoltage protection (Figure 1). Adding a diode reduces

the analog signal range, but low switch resistance and low leakage

characteristics are unaffected.

Applications Information

Figure 1. Overvoltage protection is accomplished using an exter-

nal blocking diode or a current limiting resistor .

Pin Description

Overvoltage Protection

Test Circuits/Timing Diagrams

Figure 3. Charge Injection

Figure 2. Switching Times