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MIC2753-LBM5 Datasheet(PDF) 1 Page - Micrel Semiconductor |
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MIC2753-LBM5 Datasheet(HTML) 1 Page - Micrel Semiconductor |
1 / 12 page June 1999 1 MIC2753/2754 MIC2753/2754 Micrel MIC2753/2754 Power Supply Supervisors Preliminary Information General Description The MIC2753 and MIC2754 are ultraminiature, full-featured, power supply supervisors featuring active-high and active- low reset outputs, respectively. The MIC2753/4 includes an undervoltage detector with a power-on reset generator and reset output, an overvoltage detector with a separate output for activating crowbar circuits, and a debounced manual reset input. Typical supply current is a low 30 µA. These devices provide a 140ms minimum reset output at power-on and assert their reset outputs any time the input voltage deviates beyond preset overvoltage or undervoltage thresholds. Reset outputs remain asserted for 140ms (mini- mum) after the input returns to normal or after releasing the manual reset. When an overvoltage condition is detected, the overvoltage output is immediately activated. Hysteresis on both thresholds prevents erratic operation due to noise. Typical Application Microcontroller Manual Reset MIC2754 VCC HV MR RST VCC VIN RST IN GND GND Fuse SCR Crowbar Micrel, Inc. • 1849 Fortune Drive • San Jose, CA 95131 • USA • tel + 1 (408) 944-0800 • fax + 1 (408) 944-0970 • http://www.micrel.com Features • Undervoltage and overvoltage monitor • Separate overvoltage flag output • Generates 140ms (minimum) power-on reset pulse • Debounced manual reset input • Choice of active-high (MIC2753) or active-low (MIC2754) reset outputs • Low 30 µA typical supply current • No external components needed • IttyBitty™ SOT-23-5 package Applications • Computer systems • Embedded controllers • Power supplies • Telecommunications systems |
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