TC1270 Datasheet | Microchip Technology

Obsolete Device Remended Replacements: TC1270A, TC1270AN, TC1271A TC1270/TC1271 4-Pin Reset Monitors Features : - Precision VCC Monitor for 1.8V, 2.7V, 3.0V, 3.3V and 5.0V Nominal Supplies - Manual Reset Input - 140 ms Minimum RESET, Reset Output Duration - RESET Output Valid to VCC = 1.0V (TC1270) - Low 7 µA Supply Current - VCC Transient Immunity - Small 4-Pin SOT-143 Package - No External ponents - Replacement for MAX811/812 and Offers a Lower Threshold Voltage Option Applications: - puters - Embedded Systems - Battery Powered Equipment - Critical µP Power Supply Monitoring Typical Operating Circuit VCC VCC Push Button MR RESET VCC Processor Reset Input (Active Low) General Description The TC1270 and TC1271 are cost-effective system supervisor circuits designed to monitor VCC in digital systems and provide a reset signal to the host processor 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 ponents are required. The reset output is driven active within 20 µs (4 µs for F version) of VCC falling through the reset voltage threshold. Reset is maintained active for a minimum of 140 ms after VCC rises above the reset threshold. The TC1271 has an active-high RESET output while the TC1270 has an active-low RESET output. The output of the TC1270 is valid down to VCC = 1V. Both devices are available in a 4-Pin SOT-143 package. The TC1270/TC1271 devices are optimized to reject fast transient glitches on the VCC line. Low supply current of 7 µA (VCC = 3.3V) makes these devices suitable for battery powered...