TPS3851

Product Folder Sample & Buy Technical Documents Tools & Software Support & Community TPS3851 SBVS300 – NOVEMBER 2016 TPS3851 Precision Voltage Supervisor with Integrated Watchdog Timer 1 Features 1 0.8% Voltage Threshold Accuracy Precision Undervoltage Monitoring: – Supports Common Rails from 1.8 V to 5.0 V – 4% and 7% Undervoltage Thresholds Available – 0.5% Hysteresis Factory-Programmed Precision Watchdog and Reset Timers: – ±15% Accurate WDT and RST Delays Watchdog Disable Feature User-Programmable Watchdog Timeout Input Voltage Range: VDD = 1.6 V to 6.5 V Low Quiescent Current: IDD = 10 µA (typ) Open-Drain Outputs Manual Reset Input (MR) Available in a Small 3-mm × 3-mm, 8-Pin VSON Package Junction Operating Temperature Range: –40°C to +125°C 2 Applications Safety-Critical Applications Telematics Control Units FPGAs and ASICs Microcontrollers and DSPs Fully Integrated Microcontroller Supervisory Circuit 1.8 V TPS3851 VDD SET1 MR CWD RESET WDO WDI GND VDD Microcontroller RESET NMI GPIO GND Copyright © 2016, Texas Instruments Incorporated 3 Description The TPS3851 combines a precision voltage supervisor with a programmable watchdog timer. The TPS3851 comparator achieves a 0.8% accuracy (–40°C to +125°C) for the undervoltage (VITN) threshold. The TPS3851 also includes accurate hysteresis on the undervoltage threshold making the device ideal for use with tight tolerance systems. The supervisor RESET delay features a 15% accuracy, high-...