MAX1232MJA/883B Maxim Integrated Products, MAX1232MJA/883B Datasheet

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MAX1232MJA/883B

Manufacturer Part Number
MAX1232MJA/883B
Description
Supervisory Circuits MPU Monitor
Manufacturer
Maxim Integrated Products
Datasheet
1.MAX1232CSA.pdf (6 pages)

Specifications of MAX1232MJA/883B

Number Of Voltages Monitored
1
Monitored Voltage
4.5 V, 4.75 V
Undervoltage Threshold
4.5 V, 4.25 V
Overvoltage Threshold
4.49 V, 4.74 V
Output Type
Active High, Active Low, Open Drain
Manual Reset
Resettable
Watchdog
Watchdog
Battery Backup Switching
No Backup
Power-up Reset Delay (typ)
1000 ms
Supply Voltage (max)
5.5 V
Supply Voltage (min)
4.5 V
Supply Current (typ)
200 uA
Maximum Operating Temperature
+ 125 C
Mounting Style
Through Hole
Package / Case
CDIP-8
Minimum Operating Temperature
- 55 C
Power Fail Detection
No
Lead Free Status / Rohs Status
Lead free / RoHS Compliant

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Company:
Bonase Electronics (HK) Co., Limited Bonase Electronics (HK) Co., Limited
Part Number:
MAX1232MJA/883B
Manufacturer:
MAX
Quantity:
20
Company:
Amily Shenzhen XNWY Technology Co., Ltd Amily Shenzhen XNWY Technology Co., Ltd
Part Number:
MAX1232MJA/883B
0
The MAX1232 microprocessor (µP) supervisory circuit
provides µP housekeeping and power-supply supervi-
sion functions while consuming only 1/10th the power of
the DS1232. The MAX1232 enhances circuit reliability
in µP systems by monitoring the power supply, monitor-
ing the software execution, and providing a debounced
manual reset input. The MAX1232 is a plug-in upgrade
of the Dallas DS1232.
A reset pulse of at least 250ms duration is supplied on
power-up, power-down, and low-voltage brownout
conditions (5% or 10% supply tolerances can be
selected digitally). Also featured is a debounced man-
ual reset input that forces the reset outputs to their
active states for a minimum of 250ms. A digitally pro-
grammable watchdog timer monitors software execu-
tion and can be programmed for timeout settings of
150ms, 600ms, or 1.2s. The MAX1232 requires no
external components.
19-3899; Rev 1; 11/05
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
PB RST
V
TOL
CC
TD
Computers
Controllers
Intelligent Instruments
Automotive Systems
Critical µP Power Monitoring
TOLERANCE
WATCHDOG
DEBOUNCE
TIMEBASE
5%/10%
SELECT
SELECT
REF
Typical Operating Circuit
________________________________________________________________ Maxim Integrated Products
General Description
GND
MAX1232
GENERATOR
RESET
Applications
WATCHDOG
TIMER
RST
RST
ST
Microprocessor Monitor
o Consumes 1/10th the Power of the DS1232
o Precision Voltage Monitor—Adjustable +4.5V
o Power-OK/Reset Pulse Width—250ms Min
o No External Components
o Adjustable Watchdog Timer—150ms, 600ms,
o Debounced Manual Reset Input for External
o Available in 8-Pin PDIP/SO and 16-Pin Wide SO
Ordering Information continued on last page.
* Contact factory for dice specifications.
Devices in PDIP and SO packages are available in both leaded
and lead-free packaging. Specify lead free by adding the +
symbol at the end of the part number when ordering. Lead free
not available for CERDIP package.
MAX1232C/D
MAX1232CPA
MAX1232CSA
or +4.75V
or 1.2s
Override
Packages
PART
TOP VIEW
PB RST
PB RST
GND
GND
N.C.
N.C.
N.C.
N.C.
TOL
TOL
TD
TD
1
2
4
1
2
3
4
5
6
8
3
7
Ordering Information
TEMP RANGE
0°C to +70°C
0°C to +70°C
0°C to +70°C
MAX1232
WIDE SO
MAX1232
DIP/SO
Pin Configurations
16
15
14
13
12
11
10
8
7
6
5
9
N.C.
V
N.C.
ST
N.C.
RST
N.C.
RST
V
ST
RST
RST
CC
CC
PIN-PACKAGE
Dice*
8 PDIP
8 SO
Features
1

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MAX1232MJA/883B Summary of contents

Page 1

... PB RST DEBOUNCE WATCHDOG TD TIMEBASE SELECT GND ________________________________________________________________ Maxim Integrated Products For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at 1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com. Microprocessor Monitor o Consumes 1/10th the Power of the DS1232 o Precision Voltage Monitor—Adjustable +4.5V or +4.75V o Power-OK/Reset Pulse Width—250ms Min o No External Components o Adjustable Watchdog Timer— ...

Page 2

Microprocessor Monitor ABSOLUTE MAXIMUM RATINGS Voltage on Any Pin (with respect to GND)……………-1V to +7V Operating Temperature Range C Suffix ………………………………………………0°C to +70°C E Suffix.……………………………………………-40°C to +85°C M Suffix .…………………………………………-55°C to +125°C Stresses beyond those listed under “Absolute Maximum Ratings” ...

Page 3

AC Electrical Characteristics (V = +5V ±10 MIN MAX PARAMETER SYMBOL PBRST (Note 5) PBRST Delay Reset Active Time ST Pulse Width ST Timeout Period V Fall Time (Note ...

Page 4

Microprocessor Monitor Detailed Description A voltage detector monitors V CC outputs (RST and RST) in their active states whenever V is below the selected 5% or 10% tolerance (4.62V CC or 4.37V, typically). To select the 5% level, connect TOL ...

Page 5

RST PBD V IL RST RST Figure 3. Pushbutton Reset. The debounced PBRST input ignores input pulses less than 1ms and is guaranteed to rec- ognize pulses of 20ms or greater +4.75V ...

Page 6

... Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. 6 _____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 © 2005 Maxim Integrated Products ...

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