PACKAGE ORDER INFORMA TION

T

Plastic SOIC

8-pin

0 to 70

LX7001CDM

LX7001CLP

—

-40 to 85

LX7001IDM

LX7001ILP

—

-55 to 125

—

—

LX7001MY

DM

Plastic TO-92

3-pin

LP

Ceramic Dip

8-pin

Y

Note: All surface-mount packages are available in Tape & Reel.

Append the letter "T" to part number. (i.e. LX7001CDMT)

OF

LX7001

DESCRIPTION

The LX7001 is an improved

undervoltage sensing circuit specifi-

cally designed for use as a reset

controller in microprocessor-based

systems. Today's complex miniaturized

systems present difficult challanges to

the system designer such as overcom-

ing spurious noise problems.

The

LX7001 is optimized for systems that

must be tolerant of high-speed power

supply glitches caused by high-speed

logic transitions and similar switching

phenomena. The LX7001 offers a

unique stage that couples glitch

immunity with a micropower, ultra-

stable band-gap reference for preci-

sion sensing of undervoltage condi-

tions.

It offers the designer an

KEY FEATURES

s Fully Characterized, Transient Immune

Input Stage

(See Product Highlight)

s Monitors 5V Supplies (V

s Outputs Fully Defined At V

s Ultra-Low Supply Current

(500µA Max. Over Temp)

! Temperature Compensated I

Stable Current Consumption

! µP Reset Function Programmable With 1

External Resistor And Capacitor

! Comparator Hysteresis Prevents Output

Oscillation

! Electrically Compatible With Motorola

MC34064

! Pin-to-Pin Compatible With Motorola

MC34064/MC34164

economical, space-efficient solution

for low supply voltage detection

when used in combination with a

single pull-up resistor.

Adding one

capacitor offers the functionality of a

programmable delay time after power

returns.

Additionally, the LX7001

offers excellent temperature stability.

A high-quality trimmed voltage

reference and bias circuit permit very

accurate and repeatable undervoltage

sensing.

The remaining blocks

consist of a comparator with hyster-

esis, high current clamping diode and

open collector output stage capable

of sinking up to 60mA.

The

LX7001's RESET output is specified to

be fully functional at V

APPLICA TIONS

s

s

s

s

s All Microprocessor Or Microcontroller

Designs Using 5V Supplies

s

s

s

s

s Simple 5V Undervoltage Detection

PRODUCT HIGHLIGHT

1000

0.1

100

1

10

100

IMMUNE

ACTIVE

(e

Noise Pulse Amplitude - (mV)

NOTE: For current data & package dimensions, visit our web site: http://www.linfinity.com.

Copyright © 1999

Rev. 1.2

6/99

1