TPS3803-01 Datasheet, PDF (1/12 Pages) Texas Instruments – VOLTAGE DETECTOR

features
D Single Voltage Detector (TPS3803):
Adjustable/1.5 V
D Dual Voltage Detector (TPS3805):
Adjustable/3.3 V
D High ±1.5% Threshold Voltage Accuracy
D Supply Current: 3 µA Typical at V_DD = 3.3 V
D Push/Pull Reset Output (TPS3805)
Open-Drain Reset Output (TPS3803)
D Temperature Range . . . –40°C to 85°C
D Five-Pin SC–70 Package
description
The TPS3803 and TPS3805 families of supervi-
sory circuits provide circuit initialization and timing
supervision, primarily for DSPs and processor-
based systems.
The TPS3803G15 device has a fixed-sense
threshold voltage V_IT set by an internal voltage
divider, whereas the TPS3803–01 has an
adjustable SENSE input that can be configured by
two external resistors. In addition to the fixed
sense threshold monitored at V_DD, the TPS3805
devices provide a second adjustable SENSE
input. RESET is asserted in case any of the two
voltages drops below V_IT.
During power on, RESET is asserted when supply
voltage V_DD becomes higher than 0.8 V.
Thereafter, the supervisory circuit monitors V_DD
(and/or SENSE) and keeps RESET active as long
as V_DD or SENSE remains below the threshold
voltage V_IT. As soon as V_DD (SENSE) rises above
the threshold voltage V_IT, RESET is deasserted
again. The product spectrum is designed for
1.5 V, 3.3 V, and adjustable supply voltages. The
devices are available in a five-pin SC-70 package.
The TPS3803 and TPS3805 devices are
characterized for operation over a temperature
range of –40°C to 85°C.
TPS3803-01, TPS3803G15, TPS3805H33
VOLTAGE DETECTOR
SLVS392 – JULY 2001
typical applications
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
DCK PACKAGE
(TOP VIEW)
TPS3803-01, TPS3803G15, TPS3805
NC 1
GND ²
5 SENSE
NC{
RESET ³
4
{_TPS3803G15
V_DD
typical operating circuit
1.6 V 3.3 V
R1
VDD RESET
TPS3805H33
SENSE _GND
R2
DVDD CVDD
RESET
TMS320VC5416
GND
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.
Copyright  2001, Texas Instruments Incorporated
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