Reset Sequence Pushbutton

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, reset 1 will release followed by reset 2 and finally reset 3. Sequencing of resets allows for systems to power-up in an orderly manner providing superior reliability.

Applications

* Automated Test Equipment (ATE) * Automatic Utility Meter Reading * Building Security/Remote Cameras * Cable Modems * Cell Phone Base Stations * Cell Phones * Computers: Desktop, Workstation, Server * Cordless Phones * Digital Television (Receivers, Set-Top Boxes) * End Equipment * Global Positioning Systems (GPS) * Modems (Analog, ISDN, DSL) * Network Hubs, Switches, Routers * Notebook Computers * Pagers * Palmtops, Handy Terminals (incl. barcode) * Pen Entry Palmtops, PDAs and Organizers * Point-of-Sale Terminals * Portable Patient Monitoring/Drug Delivery * Printers and Faxes * Test and Measurement Equipment

* 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