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060303

FEATURES

· Power-fail detector for personal computers

and workstations

· Connects directly to popular personal

computer chip sets

· On chip 32.768 kHz oscillator for real time

clock

· Provides battery backup power to clock chip

· Pushbutton reset input

· Accurate 5% or 10% +5-volt power supply

monitoring

· Complementary outputs for reset, power-fail,

and low battery

· Provides for reset pulse width of either 95 ms

or 190 ms

· Eliminates the need for discrete components

· Low-power CMOS circuitry

· 16-pin DIP or SOIC surface mount package

· 0°C to 70°C operation

PIN ASSIGNMENT

PIN DESCRIPTION

PBRST

- Pushbutton Reset Input

X1, X2

- Crystal Inputs

- Battery Input

- Low Battery Outputs

- Reset Outputs

RD

- Reset Duration

TOL

- Selects 5% Or 10% Detection

GND

- Ground

OSCOUT

- Oscillator Out

- Switched Power Out

- Power-Fail Outputs

- +5-Volt Power In

DESCRIPTION

The DS1632 PC Power-Fail and Reset Controller is designed to do various functions involving battery

backup and other functions typically accomplished with discrete components. The DS1632 provides a

clock function located in accompanying chip sets. In addition, the DS1632 provides for reset on both

DS1632

PC Power-Fail and Reset Controller

www.maxim-ic.com

16-Pin DIP (300-mil)

See Mech. Drawings Section

PBRST

X1

X2

PF

PF

1

2

3

16

15

14

413

LB

LB

TOL

RST

RST

RD

5

6

7

12

11

10

GND

OSCOUT

89

16-Pin SOIC (300-mil)

See Mech. Drawings Section

PBRST

X1

X2

PF

PF

1

2

3

16

15

14

413

LB

LB

TOL

RST

RST

RD

5

6

7

12

11

10

GND

OSCOUT

89