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TC1270

Microchip Technology
Part Number TC1270
Manufacturer Microchip Technology
Description (TC1271) 4-Pin uP Reset Monitors
Published Aug 31, 2005
Detailed Description Obsolete Device Recommended Replacements: TC1270A, TC1270AN, TC1271A TC1270/TC1271 4-Pin Reset Monitors Features: • Pre...
Datasheet PDF File TC1270 PDF File

TC1270
TC1270

Overview
Obsolete Device Recommended 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 Components • Replacement for MAX811/812 and Offers a Lower Threshold Voltage Option Applications: • Computers • Embedded Systems • Battery Powered Equipment • Critical µP Power Supply Monitoring Typical Operating Circuit VCC VCC Push Button MR RESET TC1270 GND VCC Processor Reset Input (Active Low) GND 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 components 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 applications.
Package Type GND 1 TC1270 RESET TC1271 (RESET) 2 TC1270 TC1271 4 VCC 3 MR © 2007 Microchip Technology Inc.
DS21381D-page 1 TC1270/TC1271 1.
0 ELECTRICAL CHARACTERISTICS Absolute Maximum Ratings† Supply Voltage (VCC to GND) .
.
.
.
+6.
0V RESET, Reset .
.
.
-0.
3V to (VCC + 0.
3V) Input Curr...


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