Datasheet SM72240E/NOPB - National Semiconductor

Detailed Description

Manufacturer: National Semiconductor

Download Data Sheet

Docket:
SM72240 SolarMagic 5-Pin Microprocessor Reset Circuits
February 25, 2011
SM72240 SolarMagic 5-Pin Microprocessor Reset Circuit
General Description
The SM72240 microprocessor supervisory circuit monitors the power supplies in microprocessor and digital systems.

It provides a reset to the microprocessor during power-up, power-down, brown-out conditions, and manual reset. The SM72240 asserts a reset signal whenever the supply decreases below the factory-programmed reset threshold. Reset will be asserted for at least 100ms even after VCC rises above the reset threshold. The SM72240 has an active-low open-drain RESET output. The SM72240 is suitable for monitoring 5V. With a low supply current of only 6µA, the SM72240 is ideal for use in portable equipment. The SM72240 is available in the 5-pin SOT23 package.

Specifications:

• Delay Time: 20 µs
• Number of Pins: 5
• Number of Supervisors / Monitors: 1
• Package / Case: SOT-23
• Reset Type: Active-Low
• Supply Current: 8 µA
• Supply Voltage Range: 1 V to 5.5 V
• Threshold Voltage: 4.63 V