DS1830 Ver la hoja de datos (PDF) - Dallas Semiconductor -> Maxim Integrated

Número de pieza

componentes Descripción

Fabricante

DS1830

Reset Sequence Pushbutton

Dallas Semiconductor -> Maxim Integrated 

www.maxim-ic.com

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

DS1830/A DS183

DS1830/A

Reset Sequence Pushbutton

PIN ASSIGNMENT

PIN DESCRIPTION

1 PBRST - Pushbutton Reset Input

2 TD

- Time Delay Select Input

3 TOL

4 GND

- VCC Tolerance Select Input

- Ground

8 VCC

7 RST1

- Power Supply

- Reset 1 Output

6 RST2

- Reset 2 Output

5 RST3

- 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

returns to an in-tolerance condition, RST1 will release followed by RST2 and finally RST3 . Sequencing of

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

Note: Some revisions of this device may incorporate deviations from published specifications known as errata. Multiple revisions of any

device may be simultaneously available through various sales channels. For information about device errata, click here: http://dbserv.maxim-

ic.com/errata.cfm.

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