Texas Instruments TPS3307-25DR, TPS3307-25DGNR, TPS3307-25DGN, TPS3307-18DR, TPS3307-25D Datasheet

TPS3307-18, TPS3307-25, TPS3307-33

TRIPLE PROCESSOR SUPERVISORS

SLVS199 – DECEMBER 1998

D

Triple Supervisory Circuits for DSP and
Processor-Based Systems

D

Power-On Reset Generator with Fixed
Delay Time of 200 ms, No External
Capacitor Needed

D

T emperature-Compensated Voltage

D OR DGN PACKAGE

(TOP VIEW)

SENSE1
SENSE2
SENSE3

GND

1
2
3
4

8
7
6
5

V

DD

MR
RESET
RESET

Reference

D

Maximum Supply Current of 40 µA

D

Supply Voltage Range...2 V to 6 V

D

Defined RESET Output from VDD ≥ 1.1 V

D

MSOP-8 and SO-8 Packages

D

T emperature Range...–40°C to 85°C

typical applications

Figure 1 lists some of the typical applications for the TPS3307 family, and a schematic diagram for a
processor-based system application. This application uses TI part numbers TPS3307–33 and MSP430C325.

3.3 V5 V2.5 V

• Applications using DSPs, Microcontrollers

or Microprocessors

• Industrial Equipment

• Programmable Controls

• Automotive Systems

• Portable/Battery Powered Equipment

• Intelligent Instruments

• Wireless Communication Systems

• Notebook/Desktop Computers

470 kΩ

620 kΩ

V

DD

SENSE 1

SENSE 2 RESET

TPS3307–33

SENSE 3

GND

100 nF

V

DD

MSP430C325
RESET

GND

Figure 1. Applications Using the TPS3307 Family

description

The TPS3307 family is a series of micropower supply voltage supervisors designed for circuit initialization
primarily in DSP and processor-based systems, which require more than one supply voltage.

The product spectrum of the TPS3307-xx is designed for monitoring three independent supply voltages:

3.3 V/1.8 V/adj, 3.3 V/2.5 V/adj or 3.3 V/5 V/adj. The adjustable SENSE input allows the monitoring of any supply
voltage >1.25 V.

The various supply voltage supervisors are designed to monitor the nominal supply voltage as shown in the
following supply voltage monitoring table.

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.

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

Copyright  1998, Texas Instruments Incorporated

1

TPS3307-18, TPS3307-25, TPS3307-33

DEVICE

TRIPLE PROCESSOR SUPERVISORS

SLVS199 – DECEMBER 1998

description (continued)

SUPPLY VOLTAGE MONITORING

NOMINAL SUPERVISED VOLTAGE THRESHOLD VOLTAGE (TYP)

SENSE1 SENSE2 SENSE3 SENSE1 SENSE2 SENSE3

TPS3307-18 3.3 V 1.8 V User defined 2.93 V 1.68 V 1.25 V
TPS3307-25 3.3 V 2.5 V User defined 2.93 V 2.25 V 1.25 V
TPS3307-33 5 V 3.3 V User defined 4.55 V 2.93 V 1.25 V

†

The actual sense voltage has to be adjusted by an external resistor divider according to the application requirements.

†
†
†

During power-on, RESET is asserted when the supply voltage V
supply voltage supervisor monitors the SENSEn inputs
below the threshold voltage V

An internal timer delays the return of the RESET
The delay time, t

= 200 ms, starts after all SENSEn inputs have risen above the threshold voltage V

d typ

IT+

.

output to the inactive state (high) to ensure proper system reset.

and keeps RESET active as long as SENSEn remain

the voltage at any SENSE input drops below the threshold voltage V

becomes higher than 1.1 V . Thereafter , the

DD

, the RESET output becomes active (low)

IT–

IT+

. When

again.
The TPS3307-xx family of devices incorporates a manual reset input, MR

. A low level at MR causes RESET
to become active. In addition to the active-low RESET output, the TPS3307-xx family includes an active-high
RESET output.

The devices are available in either 8-pin MSOP or standard 8-pin SO packages.
The TPS3307-xx devices are characterized for operation over a temperature range of – 40°C to 85°C.

AVAILABLE OPTIONS

PACKAGED DEVICES

T

A

–40_C to 85_C

SMALL OUTLINE

(D)

TPS3307-18D TPS3307-18DGN TIAAP TPS3307-18Y
TPS3307-25D TPS3307-25DGN TIAAQ TPS3307-25Y
TPS3307-33D TPS3307-33DGN TIAAR TPS3307-33Y

PowerPAD

µ-SMALL OUTLINE

(DGN)

MARKING

DGN PACKAGE

CHIP FORM

(Y)

MR

L X
H 0 0 0 L H
H 0 0 1 L H
H 0 1 0 L H
H 0 1 1 L H
H 1 0 0 L H
H 1 0 1 L H
H 1 1 0 L H
H 1 1 1 H L

†

X = Don’t care

PowerPAD is a trademark of Texas Instruments Incorporated.

2

SENSE1>V

†

IT1

FUNCTION/TRUTH TABLES

SENSE2>V

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

IT2

†

X

SENSE3>V

IT3

X L H

RESET RESET

functional block diagram

V

DD

MR

SENSE 1

SENSE 2

GND

SENSE 3

14 kΩ

R1

R3

Reference

Voltage

of 1.25 V

R2

R4

+
_

+
_

_
+

TPS3307-18, TPS3307-25, TPS3307-33

TRIPLE PROCESSOR SUPERVISORS

SLVS199 – DECEMBER 1998

TPS3307

RESET

RESET

Logic + Timer

RESET

Oscillator

timing diagram

SENSEn

V

(nom)

V

IT–

MR

RESET

t

1

0

1

0

t

d

t

d

RESET Because of SENSE Below V

t

d

RESET Because of SENSE Below V

RESET Because of MR

RESET Because of SENSE Below V

IT–

IT

IT–

t

t

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

3

TPS3307-18, TPS3307-25, TPS3307-33

I/O

DESCRIPTION

TRIPLE PROCESSOR SUPERVISORS

SLVS199 – DECEMBER 1998

TPS3307Y chip information

These chips, when properly assembled, display characteristics similar to those of the TPS3307. Thermal
compression or ultrasonic bonding may take place on the doped aluminium bonding pads. The chips may be
mounted with conductive epoxy or a gold-silicon preform.

48

TERMINAL

NAME NO.

GND 4 Ground
MR 7 I Manual reset
RESET 5 O Active-low reset output
RESET 6 O Active-high reset output
SENSE1 1 I Sense voltage input 1
SENSE2 2 I Sense voltage input 2
SENSE3 3 I Sense voltage input 3
V

DD

8 Supply voltage

56

Terminal Functions

(1)
(2)

TPS3307Y

(3)
(4)

CHIP THICKNESS: 10 TYPICAL
BONDING PADS: 4 × 4 MINIMUM
TJ max = 150°C
TOLERANCES ARE ±10%.
ALL DIMENSIONS ARE IN MILS

(8)
(7)

(6)

(5)

4

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265