2T03-01QDCKRG4Q1 Datasheet, PDF (1/16 Pages) Texas Instruments – VOLTAGE DETECTORS

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TPS3803-01-Q1
TPS3803G15-Q1
TPS3805H33-Q1
SGLS228B – DECEMBER 2003 – REVISED JANUARY 2008
VOLTAGE DETECTORS
FEATURES
1
• Qualified for Automotive Applications
• Single Voltage Detector (TPS3803):
Adjustable/1.5 V
• Dual Voltage Detector (TPS3805):
Adjustable/3.3 V
• High ±1.5% Threshold Voltage Accuracy
• Supply Current: 3 µA Typical at V_DD = 3.3 V
• Push/Pull Reset Output (TPS3805),
Open-Drain Reset Output (TPS3803)
• Temperature Range: –40°C to 125°C
• 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
either 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 125°C.
APPLICATIONS
• Applications Using DSPs, Microcontrollers, or
Microprocessors
• Wireless Communication Systems
• Portable/Battery-Powered Equipment
• Programmable Controls
• Intelligent Instruments
• Industrial Equipment
• Notebook/Desktop Computers
• Automotive Systems
DCK PACKAGE
(TOP VIEW)
SENSE
NC
1
5
NC ⁽¹⁾
GND
2
RESET
3
4
V_DD
NC – No connection
(1) SENSE on TPS3803-01, TPS3805H33
NC on TPS3803G15
1.6 V 3.3 V
R1
V_DD RESET
TPS3805H33
SENSE GND
R2
DV_DD
RESET
C V_{D D}
TMS320VC5416
GND
1
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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 the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2003–2008, Texas Instruments Incorporated