APX823 datasheet(6/12 Pages) DIODES

6 / 12 page

APX823/APX824/APX825A

PROCESSOR SUPERVISORY CIRCUITS

APX823/APX824/APX825A Rev. 3

6 of 12

FEBRUARY 2009

www.diodes.com

Timing requirements

(at RL=1mΩ, CL=50pF, TA=25

oC)

Symbol

Parameter

Test Conditions

Min

Typ.

Max

Unit

Pulse

Width

at MR

VCC> VTH-+0.2V, VIL=0.3 × VCC, VIH=0.7× VCC

100

at WDI

VCC> VTH-+0.2V, VIL=0.3 × VCC, VIH=0.7× VCC

Switching Characteristics

(at RL=1mΩ, CL=50pF, TA=25

oC)

Symbol

Parameter

Test Conditions

Min

Typ. Max

Unit

ttout

Watchdog Time Out APX823/APX824/APX825A

VCC> VTH-+0.2V,

See timing diagram

1.12

1.6

2.4

Delay Time

APX823/APX824/APX825A

VCC> VTH-+0.2V,

See timing diagram

140

200

280

tPHL

Propagation (Delay)

Time,

High-to-low-level

Output

MR to

RESET

delay (APX823/APX825A)

VCC> VTH-+0.2V,

VIL=0.3 × VCC,

VIH=0.7× VCC

0.1

μs

VCC to RESET delay

VIL= VTH--0.2V,

VIH= VTH-+0.2V

μs

tPLH

Propagation (Delay)

Time,

Low-to-high-level

Output

MR to RESET delay

(APX824/APX825A)

VCC> VTH-+0.2V,

VIL=0.3 × VCC,

VIH=0.7× VCC

0.1

μs

VCC to RESET delay

(APX824/APX825A)

VIL= VTH--0.2V,

VIH= VTH-+0.2V

μs

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