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TPS3125L30 Datasheet

  • TPS3125L30

  • ULTRA-LOW VOLTAGE PROCESSOR SUPERVISORY CIRCUITS

  • 13頁

  • TI

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TPS3123J12, TPS3123G15, TPS3123J18, TPS3124J12, TPS3124G15
TPS3124J18, TPS3125J12, TPS3125G15, TPS3125J18, TPS3125L30
ULTRA-LOW VOLTAGE PROCESSOR SUPERVISORY CIRCUITS
SLVS227 鈥?AUGUST 1999
features
typical applications
D
D
D
D
D
D
D
D
Minimum Supply Voltage of 0.75 V
Supply Voltage Supervision Range:
鈥?1.2 V, 1.5 V, 1.8 V (TPS3123, TPS3124,
TPS3125)
鈥?3 V (TPS3125 Devices only)
Power-On Reset Generator With Fixed
Delay Time of 180 ms
Manual Reset Input (TPS3123 and TPS3125)
Watchdog Timer Retriggers the RESET
Output at V
DD
鈮?/div>
V
IT
Supply Current of 14
碌A
(Typ)
SOT23鈥? Package
Temperature Range . . . 鈥?40擄C to 85擄C
D
D
D
D
D
D
D
D
Applications Using Low Voltage DSPs,
Microcontrollers or Microprocessors
Wireless Communication Systems
Portable/Battery-Powered Equipment
Programmable Controls
Intelligent Instruments
Industrial Equipment
Notebook/Desktop Computers
Automotive Systems
DBV PACKAGE
(TOP VIEW)
RESET
1
5
TPS3123
2
3
4
VDD
2.5 V
1.2 V
GND
MR
VDD
MR
TPS3125J12
GND
RESET
CVDD
DVDD
RESET
GND
TMS320UVC5402
XF
RESET
GND
RESET
RESET
GND
RESET
WDI
VDD
1
5
TPS3124
2
3
4
WDI
VDD
MR
WDI
RESET
VDD
TPS3823-25
GND
1
5
TPS3125
2
3
4
MR
Figure 1. Typical Dual-Voltage DSP Application
description
The TPS3123, TPS3124, TPS3125 family of ultra-low voltage processor supervisory circuits provides circuit
initialization and timing supervision, primarily for DSP and processor-based systems.
During power-on, RESET is asserted when the supply voltage (V
DD
) becomes higher than 0.75 V. Thereafter,
the supply voltage supervisor monitors V
DD
and keeps RESET output active as long as V
DD
remains below the
threshold voltage V
IT
. An internal timer delays the return of the output to the inactive state (high) to ensure proper
system reset. The delay time, t
dtyp
= 180 ms starts after V
DD
has risen above the threshold voltage V
IT
.
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 include
testing of all parameters.
Copyright
漏
1999, Texas Instruments Incorporated
POST OFFICE BOX 655303
鈥?/div>
DALLAS, TEXAS 75265
1

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