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TC1279-15ENB Scheda tecnica(PDF) 1 Page - Microchip Technology |
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TC1279-15ENB Scheda tecnica(HTML) 1 Page - Microchip Technology |
1 / 12 page © 2002 Microchip Technology Inc. DS21384B-page 1 TC1278/TC1279 Features • Precision VCC Monitor for 5.0V System Supplies • 250msec Minimum RESET Output Duration • Output Valid to VCC =1.2V •VCC Transient Immunity • Small 3-Pin SOT-23B Package • No External Components Applications • Computers • Embedded Systems • Battery Powered Equipment • Critical µP Power Supply Monitoring Device Selection Table NOTE: “x” denotes a suffix for VCC threshold (see table below). Package Type General Description The TC1278/TC1279 are cost-effective system super- visor circuits designed to monitor VCC in digital systems and provide a reset signal to the host processor when necessary. No external components are required. The reset output is driven active within 5 µsec of VCC falling through the reset voltage threshold. RESET is maintained active for a minimum of 250msec after VCC rises above the reset threshold. The TC1278 has an active-high RESET output while the TC1279 has an active-low RESET output, and both devices have an open drain output stage. The output is valid down to VCC = 1.2V. Both devices are available in a 3-Pin SOT- 23B package. Typical Operating Circuit Part Number Order Package Temp. Range TC1278-xENB Open Drain 3-Pin SOT-23B -40°C to +85°C TC1279-xENB Open Drain 3-Pin SOT-23B -40°C to +85°C Suffix Reset VCC Threshold (V) 5 4.625 10 4.375 15 4.125 VCC RESET GND TC1278-xENB TC1279-xENB 1 2 3 NOTE: 3-Pin SOT-23B is equivalent to JEDEC TO-236 3-Pin SOT-23B TC1279 VCC VCC VCC RESET RESET Input GND GND Processor 1 2 3 3-Pin Reset Monitors for 5V Systems |
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