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TPS3123J18 Fiches technique(PDF) 1 Page - Texas Instruments

No de pièce TPS3123J18
Description  ULTRA-LOW VOLTAGE PROCESSOR SUPERVISORY CIRCUITS
Download  13 Pages
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Fabricant  TI [Texas Instruments]
Site Internet  http://www.ti.com
Logo TI - Texas Instruments

TPS3123J18 Fiches technique(HTML) 1 Page - Texas Instruments

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TPS3123J12, TPS3123G15, TPS3123J18, TPS3124J12, TPS3124G15
TPS3124J18, TPS3125J12, TPS3125G15, TPS3125J18, TPS3125L30
ULTRA-LOW VOLTAGE PROCESSOR SUPERVISORY CIRCUITS
SLVS227 – AUGUST 1999
1
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
features
D Minimum Supply Voltage of 0.75 V
D Supply Voltage Supervision Range:
– 1.2 V, 1.5 V, 1.8 V (TPS3123, TPS3124,
TPS3125)
– 3 V (TPS3125 Devices only)
D Power-On Reset Generator With Fixed
Delay Time of 180 ms
D Manual Reset Input (TPS3123 and TPS3125)
D Watchdog Timer Retriggers the RESET
Output at VDD ≥ VIT
D Supply Current of 14 µA (Typ)
D SOT23–5 Package
D Temperature Range ...–40°C to 85°C
typical applications
D Applications Using Low Voltage 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
Figure 1. Typical Dual-Voltage DSP Application
MR
TPS3125J12
GND
VDD
RESET
MR
GND
VDD
RESET
TPS3823-25
XF
RESET
CVDD
DVDD
GND
2.5 V
1.2 V
TMS320UVC5402
WDI
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 (VDD) becomes higher than 0.75 V. Thereafter,
the supply voltage supervisor monitors VDD and keeps RESET output active as long as VDD remains below the
threshold voltage VIT. An internal timer delays the return of the output to the inactive state (high) to ensure proper
system reset. The delay time, tdtyp = 180 ms starts after VDD has risen above the threshold voltage VIT.
Copyright
© 1999, Texas Instruments Incorporated
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.
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.
3
2
4
5
DBV PACKAGE
(TOP VIEW)
1
TPS3123
RESET
GND
MR
VDD
WDI
3
2
4
5
1
TPS3124
RESET
GND
RESET
VDD
WDI
3
2
4
5
1
TPS3125
RESET
GND
RESET
VDD
MR


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