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TPS3836E18DBVT Datasheet(PDF) 1 Page - Texas Instruments |
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TPS3836E18DBVT Datasheet(HTML) 1 Page - Texas Instruments |
1 / 11 page TPS3836E18 / J25 / H30 / L30 / K33 TPS3837E18 / J25 / L30 / K33, TPS3838E18 / J25 / L30 / K33 NANOPOWER SUPERVISORY CIRCUITS SLVS292A – JUNE 2000 – REVISED JANUARY 2002 1 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 D Supply Current of 220 nA (Typ) D Precision Supply Voltage Supervision Range: 1.8 V, 2.5 V, 3.0 V, 3.3 V D Power-On Reset Generator With Selectable Delay Time of 10 ms or 200 ms D Push/Pull RESET Output (TPS3836), RESET Output (TPS3837), or Open-Drain RESET Output (TPS3838) D Manual Reset D 5-Pin SOT-23 Package D Temperature Range –40°C to 85°C D Applications Include – Applications Using Low-Power DSPs, Microcontrollers, or Microprocessors – Portable/Battery-Powered Equipment – Intelligent Instruments – Wireless Communication Systems – Notebook Computers – Automotive Systems description The TPS3836, 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 10 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. VDD GND CT MR RESET TPS3836K33 VCC VSS RST Xin MSP430 Xout T Quartz 32 kHz Lithium Battery 3.6 V TYPICAL OPERATING CIRCUIT Copyright 2002, Texas Instruments Incorporated 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. 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. 3 2 4 5 (TOP VIEW) 1 CT GND MR VDD RESET TPS3836, TPS3838 DBV PACKAGE 3 2 4 5 (TOP VIEW) 1 CT GND MR VDD RESET TPS3837 DBV PACKAGE |
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