TC1271MERCTR

Obsolete Device Recommended Replacements: TC1270A, TC1270AN, TC1271A TC1270/TC1271 4-Pin Reset Monitors Features: General Description Precision V Monitor for 1.8V, 2.7V, 3.0V, 3.3V The TC1270 and TC1271 are cost-effective system CC and 5.0V Nominal Supplies supervisor circuits designed to monitor V in digital CC systems and provide a reset signal to the host Manual Reset Input processor when necessary. A manual reset input is 140 ms Minimum RESET, Reset Output Duration provided to override the reset monitor, and is suitable RESET Output Valid to V = 1.0V (TC1270) CC for use as a push button reset. No external components Low 7 A Supply Current are required. V Transient Immunity CC The reset output is driven active within 20 s (4 s for Small 4-Pin SOT-143 Package F version) of V falling through the reset voltage CC No External Components threshold. Reset is maintained active for a minimum of 140 ms after V rises above the reset threshold. The Replacement for MAX811/812 and Offers a Lower CC Threshold Voltage Option 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 V = 1V. Both devices CC Applications: are available in a 4-Pin SOT-143 package. Computers The TC1270/TC1271 devices are optimized to reject Embedded Systems fast transient glitches on the V line. Low supply CC Battery Powered Equipment current of 7A (V =3.3V) makes these devices CC Critical P Power Supply Monitoring suitable for battery powered applications. Package Type Typical Operating Circuit V CC V V CC CC V 4 CC GND 1 Processor Reset MR RESET TC1270 Push Input TC1271 Button (Active Low) TC1270 TC1270 RESET GND GND 3 2 MR TC1271 (RESET) 2007 Microchip Technology Inc. DS21381D-page 1TC1270/TC1271 Stresses above those listed under Absolute 1.0 ELECTRICAL Maximum Ratings may cause permanent damage to CHARACTERISTICS the device. These are stress ratings only and functional operation of the device at these or any other conditions Absolute Maximum Ratings above those indicated in the operation sections of the specifications is not implied. Exposure to Absolute Supply Voltage (V to GND) .............................+6.0V CC Maximum Rating conditions for extended periods may RESET, Reset ............................ -0.3V to (V + 0.3V) CC affect device reliability. Input Current, V ..............................................20 mA CC Output Current, RESET, Reset...........................20 mA Operating Temperature Range.............-40C to +85C Storage Temperature Range ..............-65C to +150C ELECTRICAL SPECIFICATIONS Electrical Characteristics: V = 5V for L/M versions, V = 3.3V for T/S versions, V = 3V for R version, V =2.0V for F CC CC CC CC version. Unless otherwise noted, T = -40C to +85C. Typical values are at T = +25C. (Note 1). A A Symbol Parameter Min Typ Max Units Test Conditions V V Range 1.2 5.5 V CC CC I Supply Current 7 15 A V > V , for L/M/R/S/T/F CC CC TH 10 15 A V < V , for L/M/R/S/T CC TH 6 12 AV < V , for F CC TH V Reset Threshold 4.54 4.63 4.72 V TC127 L T = +25C TH A 4.50 4.75 V T = -40C to +85C A 4.30 4.38 4.46 V TC127 M T = +25C A 4.25 4.50 V T = -40C to +85C A 3.03 3.08 3.14 V TC127 T T = +25C A 3.00 3.15 V T = -40C to +85C A 2.88 2.93 2.98 V TC127 S T = +25C A 2.85 3.00 V T = -40C to +85C A 2.58 2.63 2.68 V TC127 R T = +25C A 2.55 2.70 V T = -40C to +85C A 1.71 1.75 1.79 V TC127 F T = +25C A 1.70 1.80 V T = -40C to +85C A Reset Threshold Tempco 30 ppm/C V to Reset Delay 20 s V = V to V 125 mV CC CC TH TH 5 L/M/R/S/T/F t Reset Active Time-out Period 140 280 560 ms V = V RP CC TH(MAX) MR Minimum Pulse Width 10 s t MR MR Glitch Immunity 0.1 s t MR to Reset Propagation Delay 0.5 s MD V MR Input Threshold 2.3 V V > V , TC127 L/M IH CC TH(MAX) 0.7 V V V > V , TC127 R/S/T/F CC CC TH(MAX) V 0.8 V > V , TC127 L/M V IL CC TH(MAX) 0.15 V V > V , TC127 R/S/T/F V CC CC TH(MAX) MR Pull-up Resistance 10 20 40 k V Reset Output Voltage High 0.8 V V I =150 A OH CC SOURCE (TC1271) V V CC TH(MIN) Note 1: Production testing done at T = +25C, over temperature limits ensured by design. A 2: RESET output for TC1270, Reset output for TC1271. DS21381D-page 2 2007 Microchip Technology Inc.