|Category||Analog & Mixed-Signal Processing => Power|
|Company||Texas Instruments, Inc.|
|Datasheet||Download TPS3837E18DBVR datasheet
D Supply Current 220 nA (Typ) D Precision Supply Voltage Supervision
Applications Using Low-Power DSPs, Microcontrollers, or Microprocessors Portable/Battery-Powered Equipment Intelligent Instruments Wireless Communication Systems Notebook Computers Automotive Systems Applications Using the MSP430
Delay Time 200 ms Push/Pull RESET Output (TPS3836), RESET Output (TPS3837), or Open-Drain RESET Output (TPS3838) Manual Reset 5-Pin SOT-23 Package Temperature Range to 85°Cdescription
The TPS3837, TPS3838 families of supervisory circuits provide circuit initialization and timing supervision, primarily for DSP and processor-based systems. During power on, RESET is asserted when the supply voltage VDD becomes higher than 1.1 V. Thereafter, the supervisory circuit monitors VDD and keeps RESET output active as long as VDD remains below the threshold voltage VIT. An internal timer delays the return of the output to the inactive state (high) to ensure proper system reset. The delay time starts after VDD has risen above the threshold voltage VIT.
When CT is connected to GND a fixed delay time of typical ms is asserted. When connected to VDD the delay time is typically 200 ms. When the supply voltage drops below the threshold voltage VIT, the output becomes active (low) again. All the devices of this family have a fixed-sense threshold voltage VIT set by an internal voltage divider. The TPS3836 has an active-low push-pull RESET output. The TPS3837 has active-high push-pull RESET, and TPS3838 integrates an active-low open-drain RESET output.
TYPICAL OPERATING CIRCUIT Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
PRODUCTION DATA information is current as of publication date. Products conform to specifications per the terms of Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters.
The product spectrum is designed for supply voltages 3 V, and 3.3 V. The circuits are available 5-pin SOT-23 package. The TPS3837, TPS3838 families are characterized for operation over a temperature range to 85°C.
PACKAGE INFORMATION TA DEVICE NAME TPS3838L30DBVT TPS3838K33DBVT THRESHOLD VOLTAGE 2.93 V SYMBOL PDNI PDSI PHRI PCAI PDTI PDOI PDRI PCBI PDUI PDQI PDPI PCCI PDVI
The DBVR passive indicates tape and reel of 3000 parts. The DBVT passive indicates tape and reel of 250 parts. ORDERING INFORMATIONReel Package Nominal Supply Voltage Typical Reset Threshold Voltage Functionality Family
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