TPS3809J25 Datasheet, PDF (1/8 Pages) Texas Instruments – 3-PIN SUPPLY VOLTAGE SUPERVISORS

TPS3809J25, TPS3809L30, TPS3809K33, TPS3809I50
3-PIN SUPPLY VOLTAGE SUPERVISORS
D 3-Pin SOT-23 Package
D Supply Current of 9 µA (Typical)
D Precision Supply Voltage Monitor
2.5 V, 3 V, 3.3 V, 5 V
D Power-On Reset Generator With Fixed
Delay Time of 200 ms
D Pin-For-Pin Compatible With MAX 809
D Temperature Range . . . –40°C to 85°C
SLVS228 – AUGUST 1999
TPS3809 . . . DBV PACKAGE
(TOP VIEW)
GND
1
3
VDD
RESET
2
description
The TPS3809 family of supervisory circuits provides circuit initialization and timing supervision, primarily for
DSPs and processor-based systems.
During power-on, RESET is asserted when the supply voltage V_DD becomes higher than 1.1 V. Thereafter, the
supervisory circuit monitors V_DD and keeps RESET active as long as V_DD remains below the threshold voltage
V_IT. An internal timer delays the return of the output to the inactive state (high) to ensure proper system reset.
The delay time, t_d(typ) = 200 ms, starts after V_DD has risen above the threshold voltage V_IT. When the supply
voltage drops below the threshold voltage V_IT, the output becomes active (low) again. No external components
are required. All the devices of this family have a fixed sense-threshold voltage V_IT set by an internal voltage
divider.
The product spectrum is designed for supply voltages of 2.5 V, 3 V, 3.3 V, and 5 V. The circuits are available
in a 3-pin SOT-23. The TPS3809 devices are characterized for operation over a temperature range of –40°C
to 85°C.
typical applications
TPS76333
3.3 V
5 V IN
OUT
GND
VDD
TPS3809K33
RESET
GND
VDD
TMS320LC54x
RESET
GND
D Applications Using DSPs, Microcontrollers,
or Microprocessors
D Wireless Communication Systems
D Portable/Battery-Powered Equipment
D Programmable Controls
D Intelligent Instruments
D Industrial Equipment
D Notebook/Desktop Computers
D Automotive Systems
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.
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Copyright © 1999, Texas Instruments Incorporated
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