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X40011S8I-B Datasheet(PDF) 2 Page - Xicor Inc. |
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X40011S8I-B Datasheet(HTML) 2 Page - Xicor Inc. |
2 / 25 page X40010/X40011/X40014/X40015 – Preliminary Characteristics subject to change without notice. 2 of 25 REV 1.3.4 7/12/02 www.xicor.com threshold for either voltage monitor to be repro- grammed to meet special needs or to fine-tune the threshold for applications requiring higher precision. The Watchdog Timer provides an independent protec- tion mechanism for microcontrollers. When the micro- controller 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. The device features a 2-wire interface and software protocol allowing operation on an I2C® bus. Dual Voltage Monitors *Voltage monitor requires VCC to operation. Others are independent of VCC. PIN CONFIGURATION Device Expected System Voltages Vtrip1(V) Vtrip2(V) POR (system) X40010/11 -A -B -C 5V; 3V or 3.3V 5V; 3V 3V; 3.3V; 1.8V 2.0–4.75* 4.55–4.65* 4.35–4.45* 2.85–2.95* 1.70–4.75 2.85–2.95 2.55–2.65 1.65–1.75 RESET = X40010 RESET = X40011 X40014/15 -A -B -C 3V; 3.3V; 1.5V 3V; 1.5V 3V or 3.3V; 1.1 or 1.2V 2.0–4.75* 2.85–2.95* 2.55–2.65* 2.85–2.95* 0.90–3.50* 1.25–1.35* 1.25–1.35* 0.95–1.05* RESET = X40014 RESET = X40015 PIN DESCRIPTION Pin Name Function SOIC TSSOP 1 3 V2FAIL V2 Voltage Fail Output. This open drain output goes LOW when V2MON is less than VTRIP2 and goes HIGH when V2MON exceeds VTRIP2. There is no power up reset delay circuitry on this pin. 2 4 V2MON V2 Voltage Monitor Input. When the V2MON input is less than the VTRIP2 voltage, V2FAIL goes LOW. This input can monitor an unregulated power supply with an external resistor divider or can monitor a second power supply with no external components. Connect V2MON to VSS or VCC when not used.The V2MON comparator is supplied by V2MON (X40010/11) or by VCC Input (X40014/15). 3 5 RESET/ RESET RESET Output. (X40011/15) This is an active LOW, open drain output which goes active when- ever VCC falls below VTRIP1. It will remain active until VCC rises above VTRIP1 and for the tPURST thereafter. RESET Output. (X40010/14) This is an active HIGH CMOS output which goes active whenever VCC falls below VTRIP1. It will remain active until VCC rises above VTRIP1 and for the tPURST there- after. 46 VSS Ground SDA VCC 3 2 4 1 6 7 5 8 RESET/RESET VSS V2MON 3 2 4 1 6 7 5 8 SCL WDO V2FAIL RESET/RESET SCL VSS SDA V2FAIL V2MON WDO VCC X40010/14, X40011/15 X40010/14, X40011/15 8-Pin SOIC 8-Pin TSSOP |
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