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Part Status:	Obsolete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

PMIC (power management integrated circuit) Supervisors are electronic circuits used to monitor and control the power supply and other electrical signals within a device. The DS1238A-10+ is a single-supply Microprocessor Reset Supervisor used in a variety of applications including industrial and consumer electronics. This article will discuss the application field and working principle of the DS1238A-10+.

Application field

The DS1238A-10+ is a single-supply microprocessor reset supervisor tailored for applications requiring only a single supply voltage for system reset and power supply regulation. It is used in a variety of applications including industrial and consumer electronics. It is suitable for high-temperature, low-power and portable applications as it can operate from a single +5V or +3V supply. It also provides guaranteed minimum reset voltage of 1.5V and wide operating range of 2.2V to 6V. The DS1238A-10+ can be used in multiple applications. It can be used as a power-up reset supervisor for controlling system reset during power-up and power-down. It is useful for power system sequencing and power-fail detection. It can be used for emergency system shut-down in case of accidental overvoltage. Finally, it can be used as an override control for other power management circuit components.

Working principle

The basic working principle of the DS1238A-10+ is as follows. Initially, the reset supervisor is placed in low-power standby mode. When the power supply voltage rises to proper level, the logic will reset the chip and activate the reset signal. The supervised system will thus be reset and the power management circuitry can be activated. During normal operation, the power supply voltage is monitored by the supervisor. If the voltage drops below the reset threshold, or if the power supply is removed, the reset signal will be activated and the system will be reset.The DS1238A-10+ is designed to provide 1.2mA of reset current at 2.2V. The reset signal will be activated when the power supply voltage drops below 1.5V and deactivated when the voltage goes above 1.7V. The high output current of the reset signal is designed to ensure that the system is reset quickly and reliably.

Conclusion

The DS1238A-10+ is a single-supply, microprocessor reset supervisor suitable for a wide range of applications requiring reliable system reset and power supply regulation. Its application field includes industrial and consumer electronics and it is suitable for use in high-temperature, low-power and portable applications. Its working principle is based on the monitoring of the power supply voltage and the activation of the reset signal when the voltage drops below a certain threshold.

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