Hitachi L32VK06U, Service Manual

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15.19 MAX809LTR
15.19.1 General Description
The MAX809 and MAX810 are cost-effective 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 ~200msec of VCC falling through the reset voltage threshold. Reset is maintained
active for a timeout period which is trimmed by the factory after VCC rises above the
reset threshold. The MAX810 has an active-high RESET output while the MAX809 has
an active-low RESET output. Both devices are available in SOT-23 and SC-70
packages. The MAX809/810 are optimized to reject fast transient glitches on the VCC
line. Low supply current of 0.5 A (VCC = 3.2 V) makes these devices suitable for battery
powered applications.
15.19.2 Features
x
Precision VCC Monitor for 1.5 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 Power-On Reset Pulse Width Available (1 ms, 20 ms,
100 ms, and 140 ms)