鈥?/div>
Small, 5-Pin SC-70 (SOT-323) Package
Supply Current of 9 碌A(chǔ)
Power-On Reset Generator With Fixed Delay
Time
鈥?TPS3800 = 100 ms
鈥?TPS3801 = 200 ms
鈥?TPS3802 = 400 ms
Precision Supply Voltage Monitor 1.8 V, 2.5 V,
2.7 V, 3 V, 3.3 V, 5 V, and Adjustable
Manual Reset Input (Except TPS3801-01)
Temperature Range: -40擄C to 85擄C
DESCRIPTION
The TPS380x family of supervisory circuits monitor
supply voltages to provide circuit initialization and
timing supervision, primarily for DSPs and other pro-
cessor-based systems.
These devices assert a push-pull RESET signal when
the SENSE (adjustable version) or V
DD
(fixed version)
drops below a preset threshold. The RESET output
remains asserted for the factory programmed delay
time after the SENSE or V
DD
return above its threshold.
The TPS380x devices, except the TPS3801-01, incor-
porate a manual reset input (MR). A low level at MR
causes RESET to become active.
The TPS380x uses a precision reference to achieve an
overall threshold accuracy of 2% - 2.5%. These devices
are available in a 5-pin SC-70 package, which is only
about half the size of a 5-pin SOT-23 package.
The TPS380x devices are fully specified over a tem-
perature range of -40擄C to 85擄C.
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APPLICATIONS
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
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鈥?/div>
Applications Using DSPs, Microcontrollers, or
Microprocessors
Wireless Communication Systems
Portable/Battery-Powered Equipment
Programmable Controls
Intelligent Instruments
Industrial Equipment
Notebook/Desktop Computers
Automotive Systems
TPS380x . . . DCK PACKAGE
(TOP VIEW)
GND
GND
RESET
1
2
5
MR
typical applications
V
DD
= 1.8 V
100 nF
V
DD
CoreV
DD
TMS320VC5420
3
4
V
DD
TPS3801E18
MR
RESET
GND
RESET
GND
TPS3801鈭?1 . . . DCK PACKAGE
(TOP VIEW)
GND
GND
RESET
1
2
3
4
V
DD
5
SENSE
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 in-
clude testing of all parameters.
Copyright 漏 1999 鈥?2003, Texas Instruments Incorporated
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