Diodes APX823/APX824/APX825A - Manual (Page 6)

APX823/APX824/APX825A
PROCESSOR SUPERVISORY CIRCUITS
APX823/APX824/APX825A
Document number: DS31323 Rev. 4 - 2
6 of 12
www.diodes.com
May 2011
© Diodes Incorporated
Timing Requirements (@ R
L
= 1m Ω, C
L
= 50pF, T
A
= 25
°C)
Symbol Parameter Test Conditions Min Typ. Max Unit
t
W
Pulse Width
at MR V
CC
> V
TH-
+0.2V, V
IL
=0.3
×
V
CC
, V
IH
=0.7
×
V
CC 100 - - ns
at WDI V
CC
> V
TH-
+0.2V, V
IL
=0.3
×
V
CC
, V
IH
=0.7
×
V
CC
50 - - ns
Switching Characteristics (@ R
L
= 1m Ω, C
L
= 50pF, T
A
= 25
°C)
Symbol Parameter Test Conditions Min Typ. Max Unit
t
tout
Watchdog Time Out APX823/APX824/APX825A
V
CC
> V
TH-
+0.2V,
See timing diagram
1.12 1.6 2.4 s
t
d
Delay Time APX823/APX824/APX825A
V
CC
> V
TH-
+0.2V,
See timing diagram
140 200 280 ms
t
PHL
Propagation (Delay)
Time, High-to-low-level
Output
MR to RESET
delay (APX823/APX825A)
V
CC
> V
TH-
+0.2V,
V
IL
=0.3
×
V
CC
,
V
IH
=0.7
×
V
CC
- - 0.1 μs
V
CC
to RESET delay
V
IL
= V
TH-
-0.2V,
V
IH
= V
TH-
+0.2V
- - 25 μs
t
PLH
Propagation (Delay)
Time, Low-to-high-level
Output
MR to RESET delay
(APX824/APX825A)
V
CC
> V
TH-
+0.2V,
V
IL
=0.3
×
V
CC
,
V
IH
=0.7
×
V
CC
- - 0.1 μs
V
CC
to RESET delay
(APX824/APX825A)
V
IL
= V
TH-
-0.2V,
V
IH
= V
TH-
+0.2V
- - 25 μs