Texas Instruments TPS3809I50DBV, TPS3809J25DBV, TPS3809K33DBV, TPS3809L30DBV Schematic [ru]
TPS3809J25, TPS3809L30, TPS3809K33, TPS3809I50
3-PIN SUPPLY VOLTAGE SUPER VISORS
SLVS228 – AUGUST 1999
D
3-Pin SOT-23 Package
D
Supply Current of 9 µA (Typical)
D
Precision Supply Voltage Monitor
TPS3809 . . . DBV PACKAGE
(TOP VIEW)
GND
1
2.5 V, 3 V, 3.3 V, 5 V
3
V
D
Power-On Reset Generator With Fixed
Delay Time of 200 ms
D
Pin-For-Pin Compatible With MAX 809
D
T emperature Range ...–40°C to 85°C
RESET
2
DD
description
The TPS3809 family of supervisory circuits provides circuit initialization and timing supervision, primarily for
DSPs and processor-based systems.
During power-on, RESET is asserted when the supply voltage V
supervisory circuit monitors V
and keeps RESET active as long as VDD remains below the threshold voltage
DD
VIT. An internal timer delays the return of the output to the inactive state (high) to ensure proper system reset.
The delay time, t
= 200 ms, starts after V
d(typ)
has risen above the threshold voltage V
DD
voltage drops below the threshold voltage VIT, the output becomes active (low) again. No external components
are required. All the devices of this family have a fixed sense-threshold voltage V
divider.
The product spectrum is designed for supply voltages of 2.5 V, 3 V, 3.3 V, and 5 V. The circuits are available
in a 3-pin SOT-23. The TPS3809 devices are characterized for operation over a temperature range of –40°C
to 85°C.
becomes higher than 1.1 V. Thereafter , the
DD
. When the supply
IT
set by an internal voltage
IT
typical applications
TPS76333
OUTIN5 V
GND
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.
3.3 V
V
DD
TPS3809K33
RESET
GND
V
DD
TMS320LC54x
RESET
GND
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
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.
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
Copyright 1999, Texas Instruments Incorporated
1
TPS3809J25, TPS3809L30, TPS3809K33, TPS3809I50
40°C to 85°C
3-PIN SUPPLY VOLTAGE SUPER VISORS
SLVS228 – AUGUST 1999
AVAILABLE OPTIONS
T
A
TPS3809J25DBVR†TPS3809J25DBVT
°
–
†
The DBVR passive indicates tape and reel of 3000 parts.
‡
The DBVT passive indicates tape and reel of 250 parts.
FUNCTION/TRUTH TABLE, TPS3809
VDD>V
TPS3809L30DBVR†TPS3809L30DBVT
°
TPS3809K33DBVR†TPS3809K33DBVT
TPS3809I50DBVR†TPS3809I50DBVT
RESET
IT
0
1
DEVICE NAME THRESHOLD VOLTAGE MARKING
‡
‡
‡
‡
L
H
2.25 V PCZI
2.64 V PDAI
2.93 V PDBI
4.55 V PDCI
ORDERING INFORMATION
25
J9TPS380 RDBV
Nominal Supply Voltage
Nominal Threshold Voltage
Functionality
Family
Reel
Package
functional block diagram
V
DD
GND
R1
R2
TPS3809
Reference
Voltage
of 1.137 V
Reset
_
+
Logic
+
Timer
Oscillator
RESET
2
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
timing diagram
TPS3809J25, TPS3809L30, TPS3809K33, TPS3809I50
3-PIN SUPPLY VOLTAGE SUPER VISORS
V
DD
V
(NOM)
V
IT
1.1 V
RESET
1
0 t
SLVS228 – AUGUST 1999
t
t
d
absolute maximum ratings over operating free-air temperature (unless otherwise noted)
Supply voltage, V
(see Note1) 7 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DD
t
d
For VDD< 1.1 V Undefined
Behavior of RESET Output
†
All other pins (see Note 1) –0.3 V to 7 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Maximum low output current, I
Maximum high output current, I
Input clamp current, I
Output clamp current, I
(VI<0 or VI>VDD) ±20 mA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
IK
(VO<0 or VO>VDD) ±20 mA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
OK
OL
OH
5 mA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
–5 mA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Continuous total power dissipation See Dissipation Rating Table. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operating free-air temperature range, T
Storage temperature range, T
stg
A
–40°C to 85°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
–65°C to 150°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Soldering temperature 260°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
†
Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only, and
functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not
implied. Exposure to absolute–maximum–rated conditions for extended periods may affect device reliability.
NOTE 1: All voltage values are with respect to GND. For reliable operation the device should not be operated at 7 V for more than t=1000h
continuously.
PACKAGE
DBV 437 mW 3.5 mW/°C 280 mW 227 mW
TA <25°C
POWER RATING
DISSIPATION RATING TABLE
DERATING FACTOR
ABOVE TA = 25°C
POWER RATING
TA = 70°C
TA = 85°C
POWER RATING
recommended operating conditions at specified temperature range
Supply voltage, V
Operating free-air temperature range, T
DD
A
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
MIN MAX UNIT
2 6 V
–40 85 °C
3
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