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X40035VA Datasheet(PDF) 5 Page - Intersil Corporation |
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X40035VA Datasheet(HTML) 5 Page - Intersil Corporation |
5 / 23 page 5 FN8114.2 August 25, 2008 A manual reset input provides debounce circuitry for minimum reset component count. The Watchdog Timer provides an independent protection mechanism for microcontrollers. When the microcontroller fails to restart a timer within a selectable time out interval, the device activates the WDO signal. The user selects the interval from three preset values. Once selected, the interval does not change, even after cycling the power. TABLE 1. SELECTION TABLE DEVICE EXPECTED SYSTEM VOLTAGES VTRIP1 (V) VTRIP2 (V) VTRIP3 (V) POR (SYSTEM) X40030, X40031 2.0 to 4.75* 1.70 to 4.75 1.70 to 4.75 X40030A, X40031A 5V; 3V or 3.3V; 1.8V 4.55 to 4.65* 2.85 to 2.95 1.65 to 1.75 RESET = X40030 X40030B, X40031B 5V; 3V; 1.8V 4.35 to 4.45* 2.55 to 2.65 1.65 to 1.75 RESET = X40031 X40030C, X40031C 3.3V; 2.5V; 1.8V 2.95 to 3.05* 2.15 to 2.25 1.65 to 1.75 X40034, X40035 2.0 to 4.75* 0.90 to 3.50 1.70 to 4.75 X40034A, X40035A 5V; 3.3V; 1.5V 4.55 to 4.65* 1.25 to 1.35 3.05 to 3.15 RESET = X40030 X40034B, X40035B 5V; 3V or 3.3V; 1.5V 4.55 to 4.65* 1.25 to 1.35 2.85 to 2.95 RESET = X40031 X40034C, X40035C 5V; 3V or 3.3V; 1.2V 4.55 to 4.65* 0.95 to 1.05 2.85 to 2.95 * Voltage monitor requires VCC to operate. Others are independent of VCC X40030, X40031, X40034, X40035 |
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