Processor supervisory circuits, Timing requirements, Switching characteristics – Diodes APX823/APX824/APX825A User Manual
Page 6
APX823/APX824/APX825A
PROCESSOR SUPERVISORY CIRCUITS
APX823/APX824/APX825A
Document number: DS31323 Rev. 4 - 2
6 of 12
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