DS1238A-10

Series:	MicroManager
Packaging:	Tube
Part Status:	Obsolete
Type:	Battery Backup Circuit
Number of Voltages Monitored:	1
Output:	Open Drain or Open Collector
Reset:	Active High/Active Low
Reset Timeout:	40 ms Minimum
Voltage - Threshold:	4.37V
Operating Temperature:	0°C ~ 70°C (TA)
Mounting Type:	Through Hole
Package / Case:	16-DIP (0.300", 7.62mm)
Supplier Device Package:	16-PDIP
Base Part Number:	DS1238A

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Introduction

The DS1238A-10 is an ultra-low power, Supervisory circuit designed to monitor power supplies in battery-operated consumer electronics, computing and communications equipment. It is a versatile system supervision component intended to monitor and extend the life of a system\'s power supply system. This device is based on the National Semiconductor\'s Advanced Power Monitoring System (APM) and is intended for applications such as battery-powered medical devices, handheld devices, portable computing and data communication systems.

Application Field

The DS1238A-10 is an excellent choice for systems requiring a secure, reliable, and long-term power supply. This device can monitor power supply voltages from 2.5V to 5.5V, and up to 1.2V on the high-side supply. It also provides watchdog functions for system reliability. Important features for DS1238A-10 applications include low supply current, reduced external components, and low operating temperature range (from -40°C to +125°C). The application field for the DS1238A-10 consists of battery-operated consumer electronics, computing, data communication, and medical systems. In battery-operated consumer electronics, it is used to monitor and maintain battery power levels over the life of the device. In computing systems, this device helps with recovering from accidental power outages and resetting controller modules, as well as data protection when power is lost. In data communication systems, it offers flexible protection against brownouts and overvoltage conditions. Finally, in medical systems, it can protect against voltage irregularities due to frequent changes in battery current and sudden power outages.

Working Principle

The DS1238A-10 works on the principle of comparator levels and voltage reset-time delay. A comparator level circuit is used to monitor a power supply and generate a reset command when the monitored voltage drops below or rises above a designated threshold voltage. A reset time-delay circuit is then used to maintain the reset until the voltage rises above or falls below a designated threshold. This works to protect the system from frequent and unexpected power failures, and it helps to extend the life of the power supplies. The DS1238A-10 is designed such that it can be used with minimal component count and low power consumption, making it highly efficient. It also features low noise, integrated voltage Regulation, onboard temperature sensor, and watchdog timer. The DS1238A-10 can be programmed to reset once the threshold voltage is passed or reset over a specified period of time. It also includes a two-bit status register that reads the voltage level and trip point. The DS1238A-10 has an accuracy of ±1.0% over its full range of temperature and input voltage.

Conclusion

This concludes the overview of the DS1238A-10, an ultra-low power, Supervisory circuit. This device offers superior monitoring of power supplies in battery-operated consumer electronics, computing, data communication, and medical systems. It operates on the principle of comparator levels and voltage reset-time delay, and features minimal component count and low power consumption for efficient monitoring. The DS1238A-10 also has a high accuracy of ±1.0%, making it an excellent choice for reliable and secure system supervision.

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