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10.9. Max809

10.9.1. General Description

The MAX809 and MAX810 are costíeffective system supervisor 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 10 _sec of VCC falling through the reset voltage

threshold. Reset is aintained active for a timeout period which is trimmed by the factory

after VCC rises above the reset threshold. The MAX810 has an activeíhigh RESET

output while the MAX809 has an activeílow RESET output. Both devices are available

in SOTí23 and SCí70 packages.

10.9.2. Features

x Precision VCC Monitor for 1.5 V, 1.8 V, 2.5 V, 3.0 V, 3.3 V, and 5.0 V Supplies

x Precision Monitoring Voltages from 1.2 V to 4.9 V Available in 100 mV Steps

x Four Guaranteed Minimum PoweríOn Reset Pulse Width Available (1 ms, 20

ms, 100 ms, and 140 ms)

x RESET Output Guaranteed to VCC = 1.0 V.

x Low Supply Current

x Compatible with Hot Plug Applications

x VCC Transient Immunity

x No External Components

x Wide Operating Temperature: í40°C to 105°C

x PbíFree Packages are Available

10.9.3 Absolute Maximum Ratings

1 2 ... 27 28 29 30 31 32 33 34 35 36 37 ... 88 89

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VESTEL 17MB15 User Manual Page 32