ncp1232dr2 ON Semiconductor, ncp1232dr2 Datasheet

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ncp1232dr2

Manufacturer Part Number
ncp1232dr2
Description
Microprocessor Monitor
Manufacturer
ON Semiconductor
Datasheet

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Part Number
Manufacturer
Quantity
Price
Part Number:
NCP1232DR2
Manufacturer:
ON/安森美
Quantity:
20 000
NCP1232
Microprocessor Monitor
three important functions to safeguard processor functionality:
precision power on/off reset control, watchdog timer and external
reset override.
a minimum of 250 msec after V CC is within tolerance to ensure a
stable system start–up.
watchdog circuit. The microprocessor must provide a periodic
low–going signal on the ST input. Should the processor fail to supply
this signal within the selected time–out period (150 msec, 600 msec or
1200 msec), an out–of–control processor is indicated and the
NCP1232 issues a processor reset as a result.
the PB input is brought low by an external push–button switch or other
electronic signal. When connected to a push–button switch, the
NCP1232 provides contact debounce.
package and requires no external components.
Features
Applications
May, 2000 – Rev. 0
The NCP1232 is a fully–integrated processor supervisor. It provides
On power–up, the NCP1232 holds the processor in the reset state for
Microprocessor functionality is monitored by the on–board
The outputs of the NCP1232 are immediately driven active when
The NCP1232 is packaged in a space–saving 8–pin plastic SOIC
Precision Voltage Monitor
Reset Pulse Width (250 msec Min)
No External Components
Adjustable Watchdog Timer
Debounced Manual Reset Input for External Override
Computers
Controllers
Intelligent Instruments
Automotive Systems
Critical P Power Monitoring
Semiconductor Components Industries, LLC, 2000
(Adjustable +4.5 V or +4.75 V)
(150 msec, 600 msec or 1.2 sec)
1
NCP1232DR2
8
Device
1
YY, Y
WW
X
Z
PB RST
ORDERING INFORMATION
GND
TOL
PIN CONNECTIONS
TD
http://onsemi.com
= Year
= Work Week
= Assembly ID Code
= Subcontractor ID Code
1
2
3
4
Package
8–Pin SOIC
CASE 751
(Top View)
D SUFFIX
SO–8
SO–8
Publication Order Number:
8
7
6
5
2500 Tape & Reel
V CC
ST
RST
RST
Shipping
8
1
MARKING
DIAGRAM
YWWXZ
NCP1232/D
1232
NCP

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ncp1232dr2 Summary of contents

Page 1

... Year WW = Work Week X = Assembly ID Code Z = Subcontractor ID Code PIN CONNECTIONS 8–Pin SOIC PB RST TOL 3 GND 4 (Top View) ORDERING INFORMATION Device Package NCP1232DR2 SO–8 1 Publication Order Number: MARKING DIAGRAM 8 NCP 1232 YWWXZ RST 6 RST 5 Shipping 2500 Tape & Reel ...

Page 2

VD CC 5%/10% TOLERANCE TOL SELECT REF PB RST DEBOUNCE TD WATCHDOG TIMEBASE SELECT Pin No. (8–Pin SOIC) Symbol 1 PB RST Push–button Reset Input. A debounced active–low input that ignores pulses less than 1 msec in duration and is ...

Page 3

ABSOLUTE MAXIMUM RATINGS* Voltage on any pin (with respect to GND) –0 +5.8 V Rating Operating Temperature Range Storage Temperature Range, T stg Lead Temperature (Soldering, 10 sec) *Stresses beyond those listed under “Absolute Maximum Ratings’’ may cause ...

Page 4

Power Monitor The NCP1232 detects out–of–tolerance power supply conditions and warns a processor–based system of an impending power failure. When detected as below the preset level defined by TOL, the V CC comparator outputs the signals RST ...

Page 5

NCP1232 PBD PB RST V IL RST RST Figure 3. Push–button Reset. The debounced PB RST input ignores input pulses less than 1 msec and is guaranteed to recognized pulses of 20 msec or greater PUSH–BUTTON RESET ...

Page 6

+4.75 V +4.25 V Figure 5. Power–Down Slew Rate +4.5 V (5% TRIP POINT) +4.25 V (10% TRIP POINT) RST V OH RST SLEW RATE = ...

Page 7

PACKAGE DIMENSIONS 0. SEATING PLANE 0. 0. NCP1232 SO–8 D SUFFIX CASE 751–06 ISSUE T NOTES: 1. ...

Page 8

... CENTRAL/SOUTH AMERICA: Spanish Phone: 303–308–7143 (Mon–Fri 8:00am to 5:00pm MST) Email: ONlit–spanish@hibbertco.com ASIA/PACIFIC: LDC for ON Semiconductor – Asia Support Phone: 303–675–2121 (Tue–Fri 9:00am to 1:00pm, Hong Kong Time) Toll Free from Hong Kong & Singapore: 001–800–4422–3781 Email: ONlit– ...

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