CAT823 Просмотр технического описания (PDF) - Catalyst Semiconductor => Onsemi

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CAT823

System Supervisory Voltage Reset with Watchdog and Manual Reset

Catalyst Semiconductor => Onsemi 

CAT823, CAT824, CAT825

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

WATCHDOG INPUT (CAT823 & CAT824)

tWD Watchdog Timeout Period

tWDI WDI Pulse Width

VIL

WDI Input Voltage(3)

VIH

WDI Input Current(4)

Conditions

VIL = 0.4V, VIH = 0.8 x VCC

WDI = VCC, Time Average

WDI = 0V, Time Average

Min Typ Max Units

1.12 1.60 3.20

s

50

ns

0.7 x VCC

0.3 x VCC V

120

160

µA

-20 -15

MANUAL RESET INPUT(CAT823 & CAT825)

VIL

VIH

tPB

tPDLY

¯M¯R¯ Input Voltage

¯M¯R¯ Pulse Width

¯M¯R¯ low to Reset Delay

¯M¯R¯ Noise Immunity

0.7 x VCC

1

0.3 x VCC V

µs

5

µs

Pulse Width with No Reset

100

ns

¯M¯R¯ 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.

© Catalyst Semiconductor, Inc.

5

Characteristics subject to change without notice

Doc. No. MD-3027, Rev. B

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