CS8151C datasheet(3/8 Pages) CHERRY

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Package Lead Description

Package Lead #

Lead Symbol

Function

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

s Watchdog Input

Threshold

HIGH

1.4

2.0

LOW

0.8

1.3

Hysteresis

100

Input Current

0 < WDI < 6V

-10

+10

µA

Pulse Width

50% WDI falling edge to

µs

50% WDI rising edge and

50% WDI rising edge to 50%

WDI falling edge (see Figure 1)

s Wake Up Output

Wake Up Period

see Figure 1a

Wake Up Duty Cycle nominal

see Figure 1c

HIGH to Wake Up

50%

rising edge to

Rising Delay Time

50% Wake Up edge

(see Figure 1)

Wake Up Response

50% WDI falling edge to

µs

to Watchdog Input

50% Wake Up falling edge

Wake Up Response

50%

falling edge to

µs

50% Wake Up falling edge

VOUT = 5V®4.5V

Output

LOW

IOUT = 25µA(sinking)

0.2

0.8

HIGH

IOUT = 25µA(sourcing)

3.8

4.2

5.1

Current Limit

Wake Up = 5V

0.025

1.00

7.00

Wake Up = 0V

.05

3.50

RESET

8 L PDIP

1VIN

Supply voltage to the IC.

WDI

CMOS/TTL compatible input lead. The watchdog function monitors

the falling edge of the incoming signal.

Wake Up

CMOS/TTL compatible output consisting of a continuously generated

signal used to Wake Up the microprocessor from sleep mode.

CMOS/TTL compatible output lead

goes low whenever VOUT

drops by more than 6% from nominal, or during the absence of a cor-

rect watchdog signal.

Delay

Input lead from timing capacitor for

and Wake Up signal.

Gnd

Ground Connection

8VOUT

Regulated output voltage 5V ± 2%.

RESET

Electrical Characteristics: TA = 0¡C to 70¡C, 0¡C ² TJ ² 125¡C, 6V ² VIN ² 26V, IOUT = 100µA to 100mA,

C2 = 47µF (ESR < 8½), CDelay = 0.1µF (unless otherwise noted)

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