(MAX6736 - MAX6745) Low-Power Dual-/Triple-Voltage SC70 uP Supervisory Circuits - Maxim
Description
19-2531; Rev 1; 4/03
Low-Power Dual-/Triple-Voltage SC70 µP Supervisory Circuits
General Description
The MAX6736–MAX6745 are low-power dual-/triplevoltage microprocessor (µP) supervisors.
These devices assert a reset if any monitored supply falls below its factory-trimmed or adjustable threshold and maintain reset for a minimum timeout period after all supplies rise above their thresholds.
The integrated dual/triple supervisory circuits significantly reduce size and power compared to separate ICs or discrete components.
The low supply current of 6µA makes these devices ideal for portable equipment.
The MAX6736/MAX6737 are dual fixed-voltage µP supervisors with a manual reset input.
The MAX6738/ MAX6739 have one fixed and one adjustable reset threshold and a manual reset input.
The MAX6740/ MAX6743 are triple-voltage µP supervisors with two fixed and one user-adjustable reset threshold inputs.
The MAX6741/MAX6744 are dual-voltage µP supervisors with a power-OK (POK) output ideal for powersupply sequencing.
The MAX6742/MAX6745 monitor the primary V CC supply and have an independent power-fail comparator.
The MAX6736–MAX6745 monitor I/O supply voltages (V CC1) from 1.
8V to 5.
0V and core supply voltages (VCC2) from 0.
9V to 3.
3V with factory-trimmed reset threshold voltage options (Table 1).
An external adjustable RSTIN input option allows monitoring voltages down to 0.
5V.
A variety of push-pull or open-drain reset outputs along with manual reset input and power-fail input/output features are available (see the Selector Guide ).
The MAX6736–MAX6745 are offered in a space-saving 5-pin SC70 package and operate over the -40°C to +85°C temperature range.
Features
o Dual-/Triple-Supply Reset Voltage Monitors o Precision Factory-Set Reset Thresholds for Monitoring from 0.
9V to 5.
0V o Adjustable Reset Input Down to 0.
488V o 150ms and 1200ms (min) Reset Timeout Period Options o VCC1 Power-OK Output for Power-Supply Sequencing Applications (MAX6741/MAX6744) o Power-Fail Input/P...
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