X5643/X5645

Characteristics subject to change without notice.

13 of 19

REV 1.1.1 3/5/01

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Power-Up and Power-Down Timing

RESET Output Timing

Note:

(5) This parameter is periodically sampled and not 100% tested.

CS/WDI vs. RESET/RESET Timing

Symbol

Parameter

Min.

Typ.

Max.

Unit

Reset trip point voltage, X5643-4.5A, X5643-4.5A

Reset trip point voltage, X5643, X5645

Reset trip point voltage, X5643-2.7A, X5645-2.7A

Reset trip point voltage, X5643-2.7, X5645-2.7

4.5

4.25

2.85

2.55

4.63

4.38

2.93

2.63

4.75

4.5

3.0

2.7

V

20

mV

Power-up reset time out

100

200

280

ms

(5)

500

ns

(5)

100

µs

(5)

100

µs

1V

RESET (X5643)

RESET (X5645)

0 Volts

CS/WDI

RESET

RESET