CAT823LSDI-G datasheet(5/14 Pages) CATALYST

5 / 14 page

CAT823, CAT824, CAT825

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

tWDI

WDI Pulse Width

VIL = 0.4V, VIH = 0.8 x VCC

VIL

0.3 x VCC

VIH

WDI Input Voltage

(3)

0.7 x VCC

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

¯¯¯ Input Voltage

0.7 x VCC

tPB

¯¯¯ Pulse Width

µs

tPDLY

¯¯¯ low to Reset Delay

µs

¯¯¯ Noise Immunity

Pulse Width with No Reset

100

¯¯¯ Pullup Resistance (internal)

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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