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MAX811SEUS-T
MAX811, MAX812 4-Pin µP Reset Monitors The MAX811 and MAX812 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 µsec (4 µsec for F version) of VCC falling through the reset voltage threshold. RESET is maintained active for a minimum of 140 msec after VCC rises above the reset threshold. The MAX812 has an active–high RESET output while the MAX811 has an active–low RESET output. The output of the MAX811 is guaranteed valid down to VCC = 1 V. Both devices are available in a 4–Pin SOT–143 package. The MAX811/12 are optimized to reject fast transient glitches on the VCC line. Low supply current of 7 µA (VCC = 3.3 V) makes these devices suitable for battery powered applications. 4 3 1 SOT–143 CASE 318A 2 PIN CONNECTIONS Features • Precision VCC Monitor for 1.8 V, 2.7 V, 3.0 V, 3.3 V, 5.0 V • • • • • • • http://onsemi.com Nominal Supplies Manual Reset Input 140 msec Guaranteed Minimum RESET, RESET Output Duration RESET Output Guaranteed to VCC = 1.0 V (MAX811) Low 7 µA Supply Current VCC Transient Immunity Small SOT–143–4 Package No External Components GND MAX811 (RESET) MAX812 (RESET) 1 4 VCC 2 3 MR ORDERING INFORMATION See detailed ordering and shipping information in the package dimensions section on page 6 of this data sheet. Typical Applications • • • • Computers Embedded Systems Battery Powered Equipment Critical µP Power Supply Monitoring DEVICE MARKING INFORMATION See general marking information in the device marking section on page 6 of this data sheet. VCC VCC PROCESSOR VCC MAX811 RESET INPUT (ACTIVE LOW) GND MR PUSH– BUTTON GND RESET Typical Operating Circuit © Semiconductor Components Industries, LLC, 2002 May, 2002 – Rev. 4 1 Publication Order Number: MAX811/D
MAXIM
Maxim Integrated
U.S.A
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