TPS3803−01
TPS3803G15
TPS3805H33
www.ti.com
SLVS392A − JULY 2001 − REVISED JUNE 2007
VOLTAGE
DETECTOR
FEATURES
APPLICATIONS
D
D
D
D
D
Single Voltage Detector (TPS3803):
Adjustable/1.5 V
D
Applications Using DSPs, Microcontrollers,
or Microprocessors
Dual Voltage Detector (TPS3805):
Adjustable/3.3 V
D
D
D
D
D
D
D
Wireless Communication Systems
Portable/Battery-Powered Equipment
Programmable Controls
High 1.5% Threshold Voltage Accuracy
Supply Current: 3 µA Typical at V
= 3.3 V
DD
Intelligent Instruments
Push/Pull Reset Output (TPS3805) Open-Drain
Reset Output (TPS3803)
Industrial Equipment
Notebook/Desktop Computers
Automotive Systems
D
Temperature Range: −40°C to +85°C
5-Pin SC−70 Package
D
DCK PACKAGE
(Top View)
DESCRIPTION
TPS3803−01, TPS3803G15, TPS3805
The TPS3803 and TPS3805 families of supervisory
circuits provide circuit initialization and timing supervision,
primarily for DSPs and processor-based systems.
NC
GND
1
5
SENSE
NC(1)
2
3
The TPS3803G15 device has a fixed-sense threshold
RESET
4
VDD
voltage V set by an internal voltage divider, whereas the
IT
TPS3803−01 has an adjustable SENSE input that can be
configured by two external resistors. In addition to the fixed
sense threshold monitored at VDD, the TPS3805 devices
provide a second adjustable SENSE input. RESET is
asserted in case any of the two voltages drops below VIT.
(1) NC = No Connection on TPS3803G15
Typical Operating Circuit
1.6 V
3.3 V
During power on, RESET is asserted when supply voltage
V
becomes higher than 0.8 V. Thereafter, the
DD
DVDD
CVDD
supervisory circuit monitors VDD (and/or SENSE) and
keeps RESET active as long as VDD or SENSE remains
below the threshold voltage VIT. As soon as VDD (SENSE)
R1
VDD
TPS3805H33
SENSE
RESET
RESET
TMS320VC5416
GND
rises above the threshold voltage V , RESET is
IT
deasserted again. The product spectrum is designed for
1.5 V, 3.3 V, and adjustable supply voltages. The devices
are available in a 5-pin SC-70 package. The TPS3803 and
TPS3805 devices are characterized for operation over a
temperature range of −40°C to +85°C.
GND
R2
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.
All trademarks are the property of their respective owners.
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