TPS3807

TPS3807 www.ti.com SBVS061B – AUGUST 2005 – REVISED DECEMBER 2006 Low Quiescent Current, Dual-Channel Supervisory Circuit FEATURES Two Supply Monitors in One Package One Monitor with Fixed High-Accuracy Thresholds for System Supply Monitoring Second Monitor with Variable Threshold and 30mV Hysteresis to Provide Failsafe Very Low Quiescent Current: 3.5µA typ High Threshold Accuracy: 1% max (0°C to +85°C) Open-Drain Reset Outputs Temperature Range: –40°C to +85°C Ultra-Small SC70-5 Package APPLICATIONS DSP, Microcontroller, or Microprocessor Applications Requiring User-Selected Delay Times Notebook/Desktop Computers PDAs and SmartPhones Other Hand-Held Products Portable, Battery-Powered Products FPGA/ASIC Applications DESCRIPTION The TPS3807 family microprocessor supervisory circuits monitor system voltages as low as 1.225V. These devices assert an open-drain RSTVDD signal when the VDD voltage drops below a preset threshold. The RSTVDD output remains asserted until the VDD voltage returns above its threshold. The device also provides an additional RSTSENSE output for a SENSE input with adjustable thresholds and hysteresis. The TPS3807 uses a precision reference to achieve 1% threshold accuracy. The TPS3807 has a very low typical quiescent current of 3.5µA, so it is well-suited to battery-powered applications. It is available in a small SC70-5 package, which is half the size of a SOT-23 package, and is fully specified over a temperature range of –...