ꢀ ꢁꢂꢃ ꢄ ꢅ ꢃ ꢆꢅ ꢇ ꢆꢈ ꢇ ꢉ ꢀ ꢁꢂꢃ ꢄ ꢅ ꢃ ꢊ ꢇ ꢋ ꢆꢈꢇ ꢉ ꢀ ꢁꢂꢃ ꢄ ꢅ ꢋꢌ ꢃꢃ ꢆꢈ ꢇ
ꢍꢎ ꢏꢀꢐꢊ ꢑ ꢒꢑ ꢀꢑ ꢓꢀꢎ ꢔ
SGLS228 − DECEMBER 2003
D
Push/Pull Reset Output (TPS3805)
Open-Drain Reset Output (TPS3803)
features
D
Qualification in Accordance With
D
D
Temperature Range . . . −40°C to 125°C
Five-Pin SC−70 Package
†
AEC-Q100
D
D
Qualified for Automotive Applications
Customer-Specific Configuration Control
Can Be Supported Along With
Major-Change Approval
typical applications
D
Applications Using DSPs, Microcontrollers,
or Microprocessors
D
D
Single Voltage Detector (TPS3803):
Adjustable/1.5 V
D
D
D
D
D
D
D
Wireless Communication Systems
Portable/Battery-Powered Equipment
Programmable Controls
Dual Voltage Detector (TPS3805):
Adjustable/3.3 V
D
D
High 1.5% Threshold Voltage Accuracy
Intelligent Instruments
Supply Current: 3 µA Typical at V
= 3.3 V
DD
Industrial Equipment
†
Contact factory for details. Q100 qualification data available on
request.
Notebook/Desktop Computers
Automotive Systems
description
DCK PACKAGE
(TOP VIEW)
The TPS3803 and TPS3805 families of supervi-
TPS3803-01, TPS3803G15, TPS3805
sory circuits provide circuit initialization and timing
supervision, primarily for DSPs and processor-
based systems.
1
2
3
5
NC
SENSE
NC{
GND
RESET
{
The TPS3803G15 device has a fixed-sense
threshold voltage V 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
4
V
IT
DD
TPS3803G15
sense threshold monitored at V , the TPS3805
devices provide a second adjustable SENSE
input. RESET is asserted in case any of the two
DD
typical operating circuit
1.6 V 3.3 V
voltages drops below V
IT.
During power on, RESET is asserted when supply
voltage V becomes higher than 0.8 V.
DV
DD
CV
DD
DD
R1
R2
V
RESET
TPS3805H33
SENSE
RESET
Thereafter, the supervisory circuit monitors V
DD
DD
(and/or SENSE) and keeps RESET active as long
as V or SENSE remains below the threshold
TMS320VC5416
GND
DD
voltage V . As soon as V
(SENSE) rises above
GND
IT
DD
the threshold voltage V , RESET is deasserted
IT
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 125°C.
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.
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Copyright 2003 Texas Instruments Incorporated
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1
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