TPS3803-01_12 Datasheet, PDF (1/17 Pages) Texas Instruments – VOLTAGE DETECTOR

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VOLTAGE
DETECTOR
TPS3803−01
TPS3803G15
TPS3805H33
SLVS392A − JULY 2001 − REVISED JUNE 2007
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 5-Pin SC−70 Package
DESCRIPTION
The TPS3803 and TPS3805 families of supervisory
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 5-pin SC-70 package. The TPS3803 and
TPS3805 devices are characterized for operation over a
temperature range of −40°C to +85°C.
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⁽¹⁾
RESET
3
4
V_DD
(1) NC = No Connection on TPS3803G15
Typical Operating Circuit
1.6 V 3.3 V
R1
V_DD RESET
TPS3805H33
SENSE _GND
R2
DV_DD
RESET
CV_DD
TMS320VC5416
GND
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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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