DS1814C datasheet(7/8 Pages) DALLAS

Part #	DS1814C

Description	5V and 3.3V MicroMonitor

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Manufacturer	DALLAS [Dallas Semiconductor]

Direct Link	https://www.maximintegrated.com/en.html

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DS1814/DS1819

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AC ELECTRICAL CHARACTERISTICS

(-40

°C to +85°C; VCC = 1.2V to 5.5V)

PARAMETER

SYMBOL

MIN

TYP

MAX

UNITS NOTES

PBRST

= VIL

tPB

1

ms

7

Reset Active Time

tRST

140

200

280

ms

ST

Pulse Width

tST

50

ns

8

Watchdog Time-out

tTD

1.12

1.60

2.40

s

VCC Detect to RST and RST

tRPD

30

40

ms

9

VCC Slew Rate (rising edge)

12.5

V/

ms

VCC Detect to RST and RST

tRPU

140

200

280

ms

PBRST

Stable Low to RST and RST

tPDLY

500

ns

CAPACITANCE

(t

A = 25°C)

PARAMETER

SYMBOL

MIN

TYP

MAX

UNITS NOTES

Input Capacitance

CIN

5pF

Output Capacitance

COUT

7pF

NOTES:

1) All voltages are referenced to ground.

2) PBRST is internally pulled up to VCC with an internal impedance of 50k

W typical.

3) Measured with VCC

³ 2.7V.

4) Measured with outputs open, VCC

£ 5.5V, and all inputs at VCC or Ground, except the ST input at

<10kHz duty cycle-square wave or ST input open.

5) Measured with outputs open, VCC

£ 3.6V, and all inputs at VCC or Ground, except the ST input at

<10kHz duty cycle-square wave or ST input open.

6) The ST input current is defined as the average input current when ST is driven high or low. This input

must be driven high or low by an output that can source or sink at least 200

mA when active.

7) Noise immunity: pulses <100ns at pushbutton input will not cause a reset.

8) Must not exceed tTD minimum.

9) Noise immunity: pulses <2

ms at VCCTP minimum will not cause a reset and VCCTP - VCC = 100mV.

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DS1814C Datasheet(PDF) 7 Page - Dallas Semiconductor

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