© Semiconductor Components Industries, LLC, 2011

August, 2011 − Rev. 3

1

Publication Order Number:

ASM690A/D

ASM690A/692A,

ASM802L/802M, ASM805L

mP Power Supply Supervisor

with Battery Backup Switch

Description

The ASM690A / ASM692A / ASM802L / ASM802M / ASM805L

offers complete single chip solutions for power supply monitoring and

control battery functions in microprocessor systems. Each device

implements four functions: Reset control, watchdog monitoring,

battery−backup switching and power failure monitoring. In addition to

microprocessor reset under power−up and power−down conditions,

these devices provide battery−backup switching to maintain control in

power loss and brown−out situations. Additional monitoring

capabilities can provide an early warning of unregulated power supply

loss before the voltage regulator drops out. The important features of

these four functions are:

power−up and power−down

power to RAM if VCC fails

monitoring

These features are pin−compatible with the industry standard

power−supply supervisors. Short−circuit and thermal protection have

also been added. The ASM690A / ASM802L / ASM805L generate a

reset pulse when the supply voltage drops below 4.65 V and the

ASM692A / ASM802M generate a reset below 4.40 V. The ASM802L

/ ASM802M have power−fail accuracy to

±2%. The ASM805L is the

same as the ASM690A except that RESET is provided instead of

RESET.

Features

4.65 V (ASM690A / ASM802L / ASM805L)

4.40 V (ASM692A / ASM802M)

Applications

http://onsemi.com

PIN CONFIGURATIONS

See detailed ordering and shipping information in the package

dimensions section on page 11 of this data sheet.

ORDERING INFORMATION

PDIP−8

P SUFFIX

CASE 646AA

SOIC−8

S SUFFIX

CASE 751BD

GND

PFI

RESET

WDI

PFO

ASM690A,

ASM692A,

ASM802L,

ASM802M

1

GND

PFI

RESET

WDI

PFO

ASM805L

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