TCM812

• Precision V_DD Monitor for 2.0V, 2.8V, 3.0V, 3.3V, 5.0V Nominal Supplies
• Manual Reset Input
• 140 msec Minimum RESET Output Duration
• RESET Output Valid to V_DD = 1.0V (TCM811)
• Low 6 A (typ.) Supply Current
• VDD Transient Immunity
• Small 4-Pin SOT-143 Package
• No External Components
• Replacement for MAX811/812 and Offers a Lower Threshold Voltage Option
• Push-Pull RESET Output
• Temperature Range: - Commercial (C) -40 to +85

• Computers
• Embedded Systems
• Battery Powered Equipment
• Critical Microcontroller Power Supply Monitoring

Supply Voltage (V_DD to GND).........................................+6.0V
RESET, RESET....................................... - 0.3V to (V_DD + 0.3V)
Input Current, V_DD........................................................20 mA
Output Current,  RESET, RESET.....................................20 mA
Operating Temperature Range....................... 40 to +85
Storage Temperature Range........................ 65 to +150
Maximum Junction Temperature, T_S.............................. 150

*Notice: Stresses beyond those listed under "Absolute Maximun Ratings" may cause permanenet damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximun rating conditions for extended periods may affect device reliability.

The TCM811 and TCM812 are cost effective system supervisory circuits designed to monitor VDD in digital systems and provide a reset signal to the host controller when necessary. A manual reset input is provided to override the reset monitor and is suitable for use as a push-button reset. No external components are required.

The reset output is driven active within 20 sec (5 sec for F version) of V_DD falling through the reset voltage threshold. RESET is maintained active for a minimum of 140 msec after V_DD rises above the reset threshold.

The TCM812 has an active high RESET output while the TCM811 has an active low RESET output. The output of the TCM811 is valid down to V_DD = 1V. Both devices are available in a 4-Pin SOT-143 package, specified with a temperature range of -40 to +85.

The TCM811/TCM812 are optimized to reject fast transient glitches on the V_DD line. A low supply current of 6 A (V_DD = 3.3V) makes these devices ideal for battery powered applications.