Professional IC Distribution & Technical Solutions

The MAX691ACSE+T is a microprocessor (µP) supervisory circuit manufactured by Maxim Integrated (now part of Analog Devices). Below are its key specifications, descriptions, and features:

Specifications:

• Manufacturer: Maxim Integrated
• Series: MAX691
• Package/Case: 16-SOIC (0.154", 3.90mm Width)
• Operating Temperature Range: 0°C to +70°C
• Supply Voltage (VCC): 1.2V to 5.5V
• Reset Threshold Voltage: Adjustable or fixed (depending on variant)
• Reset Timeout Period: Typically 200ms (adjustable in some variants)
• Watchdog Timer: Yes, with programmable timeout
• Manual Reset Input: Yes (active-low)
• Battery Backup Switching: Supports automatic switchover to backup battery
• Low Quiescent Current: Typically 10µA (in backup mode)

Descriptions:

• The MAX691ACSE+T is designed to monitor power supply voltages in µP and digital systems, ensuring reliable operation.
• It provides reset signals during power-up, power-down, and brownout conditions.
• Includes a watchdog timer to detect µP lockups and trigger a reset if the µP fails to respond.
• Features battery backup switching to maintain system operation during power failures.
• Suitable for 5V, 3.3V, and mixed-voltage systems due to its wide supply range.

Features:

• Power-Fail Comparator: Monitors an auxiliary voltage for early warning of power loss.
• Low-Power Operation: Minimal current draw in backup mode.
• Manual Reset Input: Allows external push-button reset control.
• Watchdog Timer: Prevents system lockup by resetting µP if not toggled periodically.
• Battery Backup Switchover: Seamlessly switches to backup power when main supply fails.
• Adjustable Reset Threshold: Some variants allow customization of reset voltage levels.

This IC is commonly used in embedded systems, industrial controls, automotive electronics, and battery-backed applications requiring reliable power monitoring.

(Note: For exact electrical characteristics, refer to the official datasheet.)