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FM1233BDS3X Datasheet(PDF) 4 Page - Fairchild Semiconductor |
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FM1233BDS3X Datasheet(HTML) 4 Page - Fairchild Semiconductor |
4 / 6 page 4 www.fairchildsemi.com FM1233B Rev. D General Description The FM1233B features a highly accurate voltage reference to which VCC is compared. Once VCC is below the specified threshold, it will drive the RESET line and continue to hold it low until VCC returns above the threshold and the time for the RESET pulse duration has expired. The FM1233B is immune to short negative going transients on the VCC line. The placement of a 0.1µF bypass capacitor as close as possible to the VCC pin provides additional transient immunity. For a VCC value below 1.0V, the FM1233B does not sink very much current on the RESET pin. This is not a problem in most systems since common devices are not functional in this range. If it is desired for the FM1233B reset to be functional below this range, use a 100K Ω pull-down resistor between RESET and VSS. Bi-Directional Reset The FM1233B permits an external pushbutton to initiate a reset. Such a connection to pin 2 will be debounced, RESET will go low and recover in typically 250ms. For proper operation, the external switch should be paralleled by an external capacitor of 100pF to 0.01µF. Connecting an External Reset to the FM1233B 1 FM1233 Controller 2 3 VCC GND 100pF PUSH BUTTON RESET |
Similar Part No. - FM1233BDS3X |
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Similar Description - FM1233BDS3X |
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