The TPS37x is a 65 V-input voltage detector with 1 µA IDD, 1% accuracy, and 10 µs detection time in a 6.25 mm2 package. This device can be connected directly to 12 V / 24 V to monitor for overvoltage (OV) and undervoltage (UV); with its internal resistor divider, the TPS37x offers the smallest total solution size. This combination of features is ideal for Factory/Building Automation and Motor Drives. Built-in hysteresis on the SENSE pins prevents false reset signals when the monitored a supply voltage rail.
The separate VDD and SENSE pins allow for the redundancy sought by high-reliability systems. SENSE is decoupled from VDD and can monitor higher and lower voltages than VDD. Optional use of external resistors are supported by the high impedance input of the SENSE pins. Both CTSx and CTRx provide delay adjustability on the rising and falling edges of the RESET signals. Also, CTSx functions as a debouncer by ignoring voltage glitches on the monitored voltage rails; CTRx operates as a manual reset (MR) that can be used to force a system reset.
The TPS37x is available in a small 2.5-mm×2.5-mm×0.1-mm WSON 10-pin wettable flanks package. The central pad is non-conductive to increase the creepage between VDD and GND per guidelines in IEC60664. TPS37x operates over –40°C to +125°C (TA).