CAT823 CATALYST [Catalyst Semiconductor], CAT823 Datasheet - Page 5

• Manufacturer Part Number: CAT823
• Description: System Supervisory Voltage Reset with Watchdog and Manual Reset
• Manufacturer: CATALYST [Catalyst Semiconductor]

ELECTRICAL OPERATING CHARACTERISTICS (continued)
DC Characteristics:
-40ºC ≤ T
V
Notes:
(3) WDI is internally serviced within the watchdog period if WDI is left open.
(4) The WDI input current is specified as an average input current when the WDI input is driven high or low. The WDI input if connected to a
© Catalyst Semiconductor, Inc.
Characteristics subject to change without notice
WATCHDOG INPUT (CAT823 & CAT824)
MANUAL RESET INPUT(CAT823 & CAT825)
CC
Symbol
three-stated output device can be disabled in the tristate mode as long as the leakage current is less than 10µA and a maximum
capacitance of less than 200pF. To clock the WDI input in the active mode the drive device must be able to source or sink at least 200µA
when active.
= 3.3V for the T/S versions; V
t
t
t
V
V
PDLY
V
V
t
WDI
WD
PB
IH
IH
IL
IL
A
≤ +85ºC unless otherwise noted. Typical Values at T
Parameter
Watchdog Timeout Period
WDI Pulse Width
WDI Input Voltage
WDI Input Current
¯¯¯ Input Voltage
¯¯¯ Pulse Width
¯¯¯ low to Reset Delay
¯¯¯ Noise Immunity
¯¯¯ Pullup Resistance (internal)
MR
MR
MR
MR
MR
V
CC
= 3.0V to 5.5V for L/M versions; V
(4)
(3)
CC
= 3.0V for the R version; and V
Conditions
V
WDI = V
WDI = 0V, Time Average
Pulse Width with No Reset
IL
= 0.4V, V
CC
5
, Time Average
IH
= 0.8 x V
CC
CC
= 2.0V to 3.6V for the R/S/T/Y/Z version,
A
= 2.5V for the Y/Z versions.
CC
= 25ºC and V
0.7 x V
0.7 x V
1.12
Min
-20
50
35
1
CAT823, CAT824, CAT825
CC
CC
CC
1.60
Typ
120
100
-15
52
= 5V for L/M versions;
0.3 x V
0.3 x V
Doc. No. MD-3027, Rev. A
Max
3.20
160
75
5
CC
CC
Units
µA
kΩ
µs
ns
µs
ns
V
V
s