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

DTriple Supervisory Circuits for DSP and Processor-Based Systems

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

DTemperature-Compensated Voltage Reference

D OR DGN PACKAGE

(TOP VIEW)

SENSE1		1	8		VDD
SENSE2
		2	7		MR
SENSE3		3	6		RESET
GND
		4	5		RESET

D D D D D

Maximum Supply Current of 40 μA

Supply Voltage Range . . . 2 V to 6 V Defined RESET Output from VDD ≥ 1.1 V MSOP-8 and SO-8 Packages Temperature 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.

2.5 V 5 V

3.3 V

	VDD		VDD
	SENSE 1		100 nF
			MSP430C325
	SENSE 2	RESET	RESET
470 kΩ	TPS3307±33
	SENSE 3		GND
620 kΩ	GND

•Applications using DSPs, Microcontrollers or Microprocessors

•Industrial Equipment

•Programmable Controls

•Automotive Systems

•Portable/Battery Powered Equipment

•Intelligent Instruments

•Wireless Communication Systems

•Notebook/Desktop Computers

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.

Copyright 1998, Texas Instruments Incorporated

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TPS3307-18, TPS3307-25, TPS3307-33

TRIPLE PROCESSOR SUPERVISORS

SLVS199 ± DECEMBER 1998

description (continued)

SUPPLY VOLTAGE MONITORING

	DEVICE	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 V²
	TPS3307-25	3.3 V	2.5 V	User defined	2.93 V	2.25 V	1.25 V²
	TPS3307-33	5 V	3.3 V	User defined	4.55 V	2.93 V	1.25 V²

² 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 VDD becomes higher than 1.1 V. Thereafter, the

supply voltage supervisor monitors the SENSEn inputs and keeps RESET active as long as SENSEn remain below the threshold voltage VIT+.

An internal timer delays the return of the RESET output to the inactive state (high) to ensure proper system reset. The delay time, td typ = 200 ms, starts after all SENSEn inputs have risen above the threshold voltage VIT+. When

the voltage at any SENSE input drops below the threshold voltage VIT±, the RESET output becomes active (low) 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
				MARKING	CHIP FORM
	TA	SMALL OUTLINE	PowerPAD
			μ-SMALL OUTLINE	DGN PACKAGE	(Y)
		(D)
			(DGN)
		TPS3307-18D	TPS3307-18DGN	TIAAP	TPS3307-18Y
	±40_C to 85_C
		TPS3307-25D	TPS3307-25DGN	TIAAQ	TPS3307-25Y
		TPS3307-33D	TPS3307-33DGN	TIAAR	TPS3307-33Y

FUNCTION/TRUTH TABLES

	MR		SENSE1>VIT1	SENSE2>VIT2	SENSE3>VIT3	RESET			RESET
	L		X²	X²	X		L		H
	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

² X = Don't care

PowerPAD is a trademark of Texas Instruments Incorporated.

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TPS3307-18, TPS3307-25, TPS3307-33

TRIPLE PROCESSOR SUPERVISORS

SLVS199 ± DECEMBER 1998

functional block diagram

VDD		TPS3307

	14 kΩ
MR
	R1	+
SENSE 1
	R2	_
	R3	+
SENSE 2
		_
		R4
GND
	Reference
	Voltage
	of 1.25 V	_
SENSE 3		+

RESET

RESET

Logic + Timer

RESET

Oscillator

timing diagram

SENSEn

V(nom)

VIT±

t

MR 1

0

t

RESET 1

0		t
td	td	td
		RESET Because of SENSE Below VIT

RESET Because of MR

RESET Because of SENSE Below VIT±

RESET Because of SENSE Below VIT±

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3

TPS3307-18, TPS3307-25, TPS3307-33

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.

(1)		(8)
(2)	(7)
	TPS3307Y
(3)	(6)
(4)	(5)

48

CHIP THICKNESS: 10 TYPICAL

BONDING PADS: 4 × 4 MINIMUM

TJ max = 150°C

TOLERANCES ARE ± 10%.

ALL DIMENSIONS ARE IN MILS

56

						Terminal Functions
	TERMINAL				I/O	DESCRIPTION
	NAME			NO.
	GND			4		Ground
				7	I	Manual reset
	MR
				5	O	Active-low reset output
	RESET
	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
	VDD			8		Supply voltage

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