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DS1830 Datasheet(PDF) 1 Page - Dallas Semiconductor |
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DS1830 Datasheet(HTML) 1 Page - Dallas Semiconductor |
1 / 7 page DS1830/A DS183 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. 1 of 7 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 1 PBRST - Pushbutton Reset Input 2 TD - Time Delay Select Input 3 TOL - VCC Tolerance Select Input 4 GND - Ground 8 VCC - Power Supply 7 RST1 - 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. www.maxim-ic.com DS1830/A Reset Sequence Pushbutton |
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