MIC1232MY Micrel Inc, MIC1232MY Datasheet

MIC1232MY

Manufacturer Part Number

MIC1232MY

Description

IC,Power Supply Supervisor,SOP,8PIN,PLASTIC

Manufacturer

Micrel Inc

Type

Simple Reset/Power-On Resetr

Datasheet

1.MIC1232MY_TR.pdf (6 pages)

Specifications of MIC1232MY

Number Of Voltages Monitored

Output

Open Drain or Open Collector

Reset

Active Low

Reset Timeout

250 ms Minimum

Voltage - Threshold

4.37V, 4.62V

Operating Temperature

-40°C ~ 85°C

Mounting Type

Surface Mount

Package / Case

8-SOIC (3.9mm Width)

Number Of Elements

Monitored Voltage 1 (typ)

4.5 to 5.5V

Watchdog Timer

Yes

Chip Enable Signals

Reset Active Time

Package Type

SOIC

Operating Supply Voltage (min)

4.5V

Operating Supply Voltage (max)

5.5V

Reset Threshold Voltage (max)

4.74V

Reset Threshold Voltage (min)

4.5V

Operating Temp Range

-40C to 85C

Operating Temperature Classification

Industrial

Power Fail Detection

Mounting

Surface Mount

Pin Count

Battery Backup Switching

Manual Reset

Yes

Lead Free Status / RoHS Status

Lead free / RoHS Compliant

Available stocks

Company

Part Number

Manufacturer

Quantity

Price

Company:

Bonase Electronics (HK) Co., Limited

Part Number:

MIC1232MY

Quantity:

4 318

Company:

Meier Automation Equipment Co., Limited

Part Number:

MIC1232MY

Manufacturer:

MICREL/麦瑞

Quantity:

20 000

Company:

Bonase Electronics (HK) Co., Limited

Part Number:

MIC1232MY-TR

Manufacturer:

2002+

Quantity:

6 218

Current page: 1 of 6
Download datasheet (143Kb)

January 2006

MIC2755

General Description

The MIC1232 is a multifunction circuit which monitors mi-

croprocessor activity, external reset and power supplies in

microprocessor based systems. The circuit functions include

a watchdog time, power supply monitor, microprocessor reset,

and manual pushbutton reset input.

The power supply line is monitored with a comparator and

an internal voltage reference. /RST is forced low when an

out-of-tolerance condition exists and remains asserted for

at least 250ms after V

(4.5V or 4.75V). The /RST pin will remain logic low with V

as low as 1.4V.

The Watchdog input (/ST) monitors µP activity and will as-

sert /RST if no µP activity has occurred with in the watchdog

timeout period. The watchdog timeout period is selectable

with nominal period of 150, 600, 1200 milliseconds.

Typical Application

Micrel, Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel + 1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com

rises above the threshold voltage

PBRST

TOL GND

V CC

MIC1232

Ordering Information

Standard

MIC1232N

MIC1232M

RST

Features

• Power OK/Reset time delay, 250ms min.

• Watchdog timer, 150ms, 600ms, or 1.2s typical

• Precision supply voltage monitor, select between 5% or

• Available in 8-pin surface mount (SO)

• Debounced External reset input

• Low supply current, <18µA typical

Applications

• Automotive systems

• Intelligent systems

• Critical microprocessor power monitoring

• Battery powered computers

• Controllers

V CC

Part Number

10% of supply voltage

RESET

I/O

Pb-Free

MIC1232NY

MIC1232MY

V CC

µP

µP Supervisory Circuit

MIC1232

Temperature Range

–40ºC to +85ºC

8-Pin SOIC

8-Pin PDIP

Package

Micrel, Inc.

MIC1232

Related parts for MIC1232MY

MIC1232MY Summary of contents

Page 1

... Low supply current, <18µA typical Applications • Automotive systems CC • Intelligent systems • Critical microprocessor power monitoring • Battery powered computers • Controllers Ordering Information Part Number Standard Pb-Free MIC1232N MIC1232NY MIC1232M MIC1232MY MIC1232 µP PBRST ST I/O RST RESET TOL GND 1 Micrel, Inc. ...

Page 2

MIC1232 Pin Conﬁguration Pin Description Pin Number Pin Name 1 /PBRST TOL 4 GND 5 RST 6 /RST 7 /ST 8 VCC MIC1232 1 8 PBRST MIC1232 TD ST TOL 3 6 RST ...

Page 3

MIC2755 Absolute Maximum Ratings Terminal Voltage V ..........................................................–0.3V to +6.0V CC All other inputs ...............................–0. Input Current VCC ...................................................................... 250mA GND, all other inputs .............................................. 25mA Lead Temperature (soldering, 10 sec.) ...................... 300°C Storage Temperature .................................. –65°C to ...

Page 4

MIC1232 Timing Diagrams V CC RST RST PBRST RST RST MIC1232 V V CCTP t RPD Figure 1. Power-Up/Power-Down Sequence Figure 2. Watchdog Input PDLY Figure 3. Pushbutton Reset 4 CCTP t ...

Page 5

MIC2755 Applications Information Power Monitor The /RST and RST pins are asserted whenever V below the reset threshold voltage as determined by the TOL pin tolerance level (4.62V reset threshold voltage) can be selected by connecting the TOL ...

Page 6

... MICREL INC. 2180 FORTUNE DRIVE SAN JOSE, CA 95131 USA + 1 (408) 944-0800 TEL This information furnished by Micrel in this data sheet is believed to be accurate and reliable. However no responsibility is assumed by Micrel for its use. Micrel reserves the right to change circuitry and speciﬁcations at any time without notiﬁcation to the customer. ...

Related keywords

MIC1232MY datasheet
MIC1232MY data sheet
MIC1232MY pdf datasheet
MIC1232MY component
MIC1232MY part
MIC1232MY distributor
MIC1232MY RoHS
MIC1232MY datasheet download