DS1830/A DS183

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060303

FEATURES

§ 5V (DS1830) or 3.3V (DS1830A) power-on

reset

§ Excellent for systems that need power-on

resets in a consistent sequence

§ Asserts resets during power transients

§ Pushbutton reset input for system override

§ Selectable reset timing

§ Reduces need for discrete components

§ Precision temperature-compensated voltage

reference

§ 8-pin DIP, 8-pin SO, or space saving 8-pin

µSOP

§ Operating temperature of -40°C to +85°C

§ Open-drain, active-low inputs

PIN ASSIGNMENT

PIN DESCRIPTION

- Pushbutton Reset Input

2 TD

- Time Delay Select Input

3 TOL

4 GND

- Ground

- Power Supply

- Reset 1 Output

- Reset 2 Output

- Reset 3 Output

DESCRIPTION

The DS1830 Reset Sequencer monitors the power supply for an in-tolerance condition and the pushbutton

reset input for a manual reset. First a precision temperature-compensated reference and comparator circuit

monitors the status of the power supply and when an out-of-tolerance condition is detected, an internal

power fail signal is generated that forces the reset lines to go to an active state. If the power supply

resets allows for systems to power-up in an orderly manner providing superior reliability.

www.maxim-ic.com

DS1830/A

Reset Sequence Pushbutton