PT7M7809x

Product Description

The PT7M78xx family microprocessor (µP) supervisory circuits are targeted to improve reliability and accuracy of power-supply circuitry in µP systems. These devices reduce the complexity and number of components required to monitor power-supply and battery functions.

The main functions are:

1. Asserting reset output during power-up, power-down and brownout conditions for µP system.
2. Detecting power failure or low-battery conditions with a 1.25V threshold detector
3. Watchdog functions
4. Manual reset.

Features

• Precision supply-voltage monitor
• 4.63V (PT7M78xxL)
• 4.38V (PT7M78xxM)
• 3.08V (PT7M78xxT)
• 2.93V (PT7M78xxS)
• 2.63V (PT7M78xxR)
• 2.32V (PT7M78xxZ)
• 2.20V (PT7M78xxY)
• 4.00V (PT7M78xxJ)
• 2.25V (PT7M78xxK)
• 2.80V (PT7M78xxG)
• 200ms reset pulse width
• Debounced CMOS-compatible manual-reset input (7811, 7812, 7823, 7825)
• Reset Output Signal for Watchdog and Power
• Abnormal, Manual Reset
• Reset Push-Pull output (PT7M7809,7811,7823,7824,7825)
• Reset Open-Drain output (PT7M7803)
• Voltage monitor for power-fail or low battery warning
• Guaranteed RESET/RESET valid at V_CC=1.0V

Applications

• Power-supply circuitry in µP systems
• Networking
• Security System
• Server/Storage
• Embedded System