IC SUPERVISOR MULTIFUNC 5V 8SOIC

 

MIC1232M TR

Manufacturer Part NumberMIC1232M TR
DescriptionIC SUPERVISOR MULTIFUNC 5V 8SOIC
ManufacturerMicrel Inc
TypeSimple Reset/Power-On Reset
MIC1232M TR datasheets

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Specifications of MIC1232M TR

Number Of Voltages Monitored1OutputOpen Drain or Open Collector
ResetActive LowReset Timeout250 ms Minimum
Voltage - Threshold4.37V, 4.62VOperating Temperature-40°C ~ 85°C
Mounting TypeSurface MountPackage / Case8-SOIC (3.9mm Width)
Lead Free Status / RoHS StatusContains lead / RoHS non-compliantOther namesMIC1232MTR
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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
rises above the threshold voltage
CC
(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
January 2006
MIC1232
µP Supervisory Circuit
Features
• Power OK/Reset time delay, 250ms min.
• Watchdog timer, 150ms, 600ms, or 1.2s typical
• Precision supply voltage monitor, select between 5% or
10% of supply voltage
• Available in 8-pin surface mount (SO)
• Debounced External reset input
• 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
V CC
V CC
TD
V CC
MIC1232
µP
PBRST
ST
I/O
RST
RESET
TOL GND
1
Micrel, Inc.
Temperature Range
Package
–40ºC to +85ºC
8-Pin PDIP
–40ºC to +85ºC
8-Pin SOIC
MIC1232

MIC1232M TR Summary of contents

  • Page 1

    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. ...

  • 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. ...