Product Summary

The DS1238AS-5 is a MicroManager. It provides all the necessary functions for power supply monitoring, reset control, and memory backup in microprocessor-based systems. A precise internal voltage reference and comparator circuit monitor power supply status. When an out-of-tolerance condition occurs, the microprocessor reset and power-fail outputs are forced active, and static RAM control unconditionally write protects external memory. The DS1238AS-5 also provides early warning detection of a user-defined threshold by driving a non-maskable interrupt.

Parametrics

DS1238AS-5 absolute maximum ratings: (1)Voltage on VCC Pin Relative to Ground: -0.5V to +7.0V; (2)Voltage on I/O Relative to Ground: -0.5V to VCC + 0.5V; (3)Operating Temperature: 0 to 70℃; (4)Operating Temperature (Industrial Version): -40 to +85℃; (5)Storage Temperature: -55 to +125℃; (6)Soldering Temperature: 260℃ for 10 seconds.

Features

DS1238AS-5 features: (1)Holds microprocessor in check during power transients; (2)Halts and restarts an out-of-control microprocessor; (3)Warns microprocessor of an impending power failure; (4)Converts CMOS SRAM into nonvolatile memory; (5)Unconditionally write protects memory when power supply is out of tolerance; (6)Delays write protection until completion of the current memory cycle; (7)Consumes less than 200 nA of battery current; (8)Controls external power switch for high current applications; (9)Debounces pushbutton reset; (10)Accurate 10% power supply monitoring; (11)Optional 5% power supply monitoring designated DS1238A-5; (12)Provides orderly shutdown in microprocessor applications; (13)Pin-for-pin compatible with MAX691; (14)Standard 16-pin DIP or space-saving 16-pin SOIC; (15)Optional industrial temperature range -40 to +85℃.

Diagrams

DS1238AS-5 block diagram

Image Part No Mfg Description Data Sheet Download Pricing
(USD)
Quantity
DS1238AS-5
DS1238AS-5

Maxim Integrated Products

Supervisory Circuits

Data Sheet

Negotiable 
DS1238AS-5/T&R
DS1238AS-5/T&R

Maxim Integrated Products

Supervisory Circuits

Data Sheet

Negotiable 
DS1238AS-5+T&R
DS1238AS-5+T&R

Maxim Integrated Products

Supervisory Circuits

Data Sheet

Negotiable 
DS1238AS-5+
DS1238AS-5+

Maxim Integrated Products

Supervisory Circuits

Data Sheet

Negotiable 
DS1238AS-5/T&R/
DS1238AS-5/T&R/

Maxim Integrated Products

Supervisory Circuits

Data Sheet

Negotiable