ZC811 RESET IC替代MAX811

四维电子

Features
! t" _$ g. J" Z( Y: C Precision voltage monitor for 3V, 3.3V or 5V power supplies
 140ms minimum reset pulse width available
 Reset remains valid with V CC as low as 1V
 3μAtypical supply current
% f& _7 {2 u0 U9 g+ ?8 y7 w6 I% T Available in 4-pin SOT-143 package
7 ^8 `& o; o5 F8 @Applications
4 b! S& \; l  a; P Computer
 Controller
$ @' O* N) W6 E, W Intelligent Instruments
 Critical uP and uC Power Monitoring
' k/ U& J+ j& `8 m9 B9 g: ] Portable/Battery-Powered Equipment
  p1 }  Y7 q- a% y0 n% x# E/ L1 y6 y3 ODescription
The ZC811is a low-power microprocessor (μP)
2 ~' ^  g% O7 s# \! osupervisory circuit used to monitor power supplies
& z5 l6 ^0 w* h/ G3 h* g8 @* bin microprocessor and digital systems. Low supply
* M$ c, O4 O. J  @4 Hcurrent makes the ZC811ideal for use in portable
! v& R9 b7 H  T2 Z+ fequipment. The device comes in a 4-pin SOT-143
6 T0 v4 S! m, N% hpackage.
The ZC811provides excellent circuit reliability and
9 U9 f1 W9 L. I) N( _; ^low BOM cost by eliminating external components
+ e2 v! K4 x! a( J. rand adjustments when used with 5V-powered or
3V-powered circuits. The ZC811also provides a
debounced manual reset input.
5 S% Z5 s6 r8 F6 q% P- CThe function of this device is to assert a reset if
either the power supply drops below a designed
reset threshold level or MR is forced low. The
reset comparator is designed to ignore fast transients
on V CC . Reset thresholds are available for operation
2 r$ f$ g* e* ^$ E3 j/ gwith a variety of supply voltages.