IMP IMP1233MZ-55T, IMP1233MZ-5T, IMP1233MZ-3T Datasheet

2000 © IMP, Inc. 408-432-9100/www.impweb.com 1

IMP1

IMP1

233M

233M

POWER MANAGEMENT

Key Features

Applications

◆ Set-top boxes

◆ Cellular phones

◆ PDAs

◆ Energy management systems

◆ Embedded control systems

◆ Printers

◆ Single board computers

◆

Improved Dallas DS1233M replacement
— 60% lower maximum supply current

◆

Low Supply Current
— 20µA maximum (5.5V)
— 15µA maximum (3.6V)

◆

Automatically restarts a microprocessor after
power failure

◆

350ms reset delay after VCCreturns to an
in-tolerance condition

◆

Active LOW power-up reset, 5kΩ internal pull-up

◆

Precision temperature-compensated voltage
reference and comparator

◆

Eliminates external components

◆

Pin function compatible with the Motorola
MC33064, MC34064, MC33164 and MC34164

◆

Motorola 68xxx and HC16 compatible

◆

Compact surface mount SO-8 package

◆

Operating temperature –40°C to +85°C

Block Diagram

–

+

1233M_01.eps

V

CC

RESET

GND

5.0k

W

Supply

Tolerance

Bias

IMP1233M

Delay

350ms Typical

Reference

Lo

Lo

w P

w Poowwerer

, 5V/3.0V

, 5V/3.0V µµ

P R

P R

eset

eset

– A

– A

ctiv

ctiv

e L

e LOOWW

, Open-Dr

, Open-Dr

ain Output

ain Output

– 350ms R

– 350ms R

eset P

eset Perer

iod

iod

The IMP1233M supply voltage monitor is an improved, low-power
replacement for the Dallas Semiconductor DS1233M. Maximum supply
current over temperature is a low 20µA, representing 60 percent lower
power as compared to the DS1233M.

The IMP1233M issues an active LOW reset signal whenever the moni­tored supply is out-of-tolerance. A precision reference and comparator
circuit monitor power supply (V

CC

) level. Tolerance level options are
5- and 10-percent for a 5V power supply. The tolerance is 15-percent for
the 3.3V, IMP1233M. When an out-of-tolerance condition is detected, an
internal power-fail signal is generated which forces an active LOW reset
signal. After V

CC

returns to an in-tolerance condition, the reset signal
remains active for 350ms to allow the power supply and system micro­processor to stabilize.

The IMP1233M is designed with a open-drain output stage and operates
over the extended industrial temperature range. Devices are available in
the compact surface mount SO-8 package.

Other low power products in this family include the IMP1810/11/12/15/
16/17 and IMP1233D.

Typical Application

IMP1233M

Microprocessor

RESET

RESET

1233M_02.eps

V

CC

GND

traP

egatloVTESER

)V(

emiTTESER

)sm(

tuptuO

egatS

TESER

ytiraloP

0181PMI021.4,073.4,026.4051lluP-hsuPWOL
1181PMI031.4,053.4,026.4051niarD-nepOWOL
2181PMI031.4,053.4,026.4051lluP-hsuPHGIH
5181PMI055.2,088.2,060.3051lluP-hsuPWOL
6181PMI055.2,088.2,060.3051niarD-nepOWOL
7181PMI055.2,088.2,060.3051lluP-hsuPHGIH

D3321PMI521.4,573.4,526.4053niarD-nepOWOL
M3321PMI027.2,573.4,526.4053niarD-nepOWOL

Family Selection Guide

IMP1

IMP1

233M

233M

2 408-432-9100/www.impweb.com 2000 © IMP, Inc.

!

Pin Configuration

Pin Descriptions

1233M_03.eps

4GND

3NC

2V

CC

1RESET

5NC

6NC

7NC

8NC

IMP1233M

Ordering Information

SO-8

yrammuSeciveD

**traP

rebmuN

TESER

tuptuO
egatloV

)V(

TESER

ecnareloT

)%(

TESER
emiT
)sm(

egatStuptuO

8-OS

egakcaP

TESER

ytiraloP

*niarD-nepOlluP-hsuP

T/55-SM3321PMI526.45053

""

WOL

T/5-SM3321PMI573.401053

""

WOL

T/3-SM3321PMI027.251053

""

WOL

k5lanretnI* Ω .pulluprotsiser

.leeRdnaepaTsetacidniT/**

spe.30t_M3321

srebmuNniP

emaNnoitcnuF

8-OS29-OT

11TESERtuptuoteserWOLevitcA
22V

CC

tupniylppusrewoP

8dna7,6,5,3 — CNnoitcennocoN

43DNGdnuorG