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CAT823 Datasheet(PDF) 5 Page - Catalyst Semiconductor

No. de Pieza. CAT823
Descripción  System Supervisory Voltage Reset with Watchdog and Manual Reset
Descarga  14 Pages
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Fabricante  CATALYST [Catalyst Semiconductor]
Página de inicio  http://www.catalyst-semiconductor.com
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CAT823 Datasheet(HTML) 5 Page - Catalyst Semiconductor

 
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CAT823, CAT824, CAT825
© Catalyst Semiconductor, Inc.
5
Doc. No. MD-3027, Rev. B
Characteristics subject to change without notice
ELECTRICAL OPERATING CHARACTERISTICS (continued)
DC Characteristics: VCC = 3.0V to 5.5V for L/M versions; VCC = 2.0V to 3.6V for the R/S/T/Y/Z version,
-40ºC ≤ TA ≤ +85ºC unless otherwise noted. Typical Values at TA = 25ºC and VCC = 5V for L/M versions;
VCC = 3.3V for the T/S versions; VCC = 3.0V for the R version; and VCC = 2.5V for the Y/Z versions.
Symbol
Parameter
Conditions
Min
Typ
Max
Units
WATCHDOG INPUT (CAT823 & CAT824)
tWD
Watchdog Timeout Period
1.12
1.60
3.20
s
tWDI
WDI Pulse Width
VIL = 0.4V, VIH = 0.8 x VCC
50
ns
VIL
0.3 x VCC
VIH
WDI Input Voltage
(3)
0.7 x VCC
V
WDI = VCC, Time Average
120
160
WDI Input Current
(4)
WDI = 0V, Time Average
-20
-15
µA
MANUAL RESET INPUT(CAT823 & CAT825)
VIL
0.3 x VCC
VIH
MR
¯¯¯ Input Voltage
0.7 x VCC
V
tPB
MR
¯¯¯ Pulse Width
1
µs
tPDLY
MR
¯¯¯ low to Reset Delay
5
µs
MR
¯¯¯ Noise Immunity
Pulse Width with No Reset
100
ns
MR
¯¯¯ Pullup Resistance (internal)
35
52
75
kΩ
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
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.


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