Texas Instruments TL7759CPWR, TL7759CPWLE, TL7759CPS, TL7759CP, TL7759CDR Datasheet

									TL7759
		SUPPLY-VOLTAGE SUPERVISORS
		SLVS042D ± JANUARY 1991 ± REVISED JULY 1999
D	Power-On Reset Generator	D, P, OR PW PACKAGE
D Automatic Reset Generation After Voltage				(TOP VIEW)
	Drop
	Precision Input Threshold	NC		1	8			RESET
D		NC		2	7			RESET
	Voltage . . . 4.55 V ±120 mV	NC		3	6			NC
D Low Standby Current . . . 20 A		GND		4	5			VCC

DReset Outputs Defined When VCC

Exceeds 1 V

NC ± No internal connection

DTrue and Complementary Reset Outputs

DWide Supply-Voltage Range . . . 1 V to 7 V

description

The TL7759 is a supply-voltage supervisor designed for use as a reset controller in microcomputer and microprocessor systems. The supervisor monitors the supply voltage for undervoltage conditions. During power up, when the supply voltage, VCC, attains a value approaching 1 V, the RESET and RESET outputs become active (high and low, respectively) to prevent undefined operation. If the supply voltage drops below the input threshold voltage level (VIT± ), the reset outputs go to the reset active state until the supply voltage has returned to its nominal value (see timing diagram).

The TL7759C is characterized for operation from 0°C to 70°C.

AVAILABLE OPTIONS

		PACKAGED DEVICES
					CHIP
		SMALL	PLASTIC	SHRINK
	TA			SMALL	FORM
		OUTLINE	DIP
				OUTLINE	(Y)
		(D)	(P)
				(PW)
	0°C to 70°C	TL7759CD	TL7759CP	TL7759CPW	TL7759Y

The D and PW packages are available taped and reeled. Add the suffix R to the device type (e.g., TL7759CDR). Chip forms are tested at 25°C.

functional block diagram

	5
	VCC
+	7
	RESET
±	8
	RESET

Reference

Voltage

4

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.

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 1999, Texas Instruments Incorporated

POST OFFICE BOX 655303 •DALLAS, TEXAS 75265

1

TL7759

SUPPLY-VOLTAGE SUPERVISORS

SLVS042D ± JANUARY 1991 ± REVISED JULY 1999

absolute maximum ratings over operating free-air temperature range (unless otherwise noted)²

Supply voltage, VCC (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .					. . . . . . . . . 20	V
Off-state output voltage range:		RESET		. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .voltage	±0.3 V to 20	V
	RESET voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .				±0.3 V to 20	V
Low-level output current, IOL	(RESET)		. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .		. . . . . . . 30 mA
High-level output current, IOH (RESET) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .					. . . . . . ±10 mA
Package thermal impedance, θJA (see Notes 2 and 3): D package . . . . . . . . . . . . . . . . . . . . . .					. . . . . . 97°C/W
				P package . . . . . . . . . . . . . . . . . . . . . .	. . . . . 127°C/W
				PW package . . . . . . . . . . . . . . . . . . . .	. . . . . 149°C/W
Lead temperature 1,6 mm (1/16 inch) from case for 10 seconds . . . . . . . . . . . . . . . . . . . . . . . .					. . . . . . . 260°C
Storage temperature range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .					±65°C to 150°C

²Stresses beyond those listed under ªabsolute maximum ratingsº 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 ªrecommended operating conditionsº is not

implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability. NOTES: 1. All voltage values are with respect to the network ground terminal.

2.Maximum power dissipation is a function of TJ(max), θJA, and TA. The maximum allowable power dissipation at any allowable ambient temperature is PD = (TJ(max) ± TA)/θJA. Operating at the absolute maximum TJ of 150°C can impact reliability.

3.The package thermal impedance is calculated in accordance with JESD 51, except for through-hole packages, which use a trace length of zero.

recommended operating conditions

						MIN	MAX	UNIT
Supply voltage, VCC						1	7	V
Output voltage, VO (see Note 4)	Transistor off			RESET	voltage		15	V
	Transistor off RESET voltage					0
Low-level output current, IOL							24	mA
		RESET
High-level output current, IOH	RESET						±8	mA
Operating free-air temperature, TA	TL7759C					0	70	°C

NOTE 4: RESET output must not be pulled down below GND potential.

electrical characteristics over recommended operating free-air temperature range (unless otherwise noted)

PARAMETER

TEST CONDITIONS

TL7759C

UNIT

MIN

TYP³

MAX

VOL

Low-level output voltage

RESET

VCC = 4.3 V

IOL = 24 mA

0.4

0.8

V

VOH

High-level output voltage

RESET

IOH = ±8 mA

VCC±1

V

VIT±

Input threshold voltage

TA = 25°C

4.43

4.55

4.67

V

(negative-going V

CC

)

°

°

4.4

4.7

TA = 0 C to 70 C

V

§

Power-up reset voltage

RL = 2.2 kΩ

TA = 25°C

0.8

1

V

res

TA = 0°C to 70°C

1.2

V

¶

Hysteresis at VCC input

TA = 25°C

40

50

60

mV

hys

TA = 0°C to 70°C

30

70

IOH

High-level output current

RESET

VCC = 7 V, See Figure 1

VOH = 15 V

1

A

IOL

Low-level output current

RESET

VOL = 0 V

±1

A

ICC

Supply current

No load

VCC = 4.3 V

1400

2000

A

VCC = 5.5 V

40

³ Typical values are at TA = 25°C.

§This is the lowest voltage at which RESET becomes active, VCC slew rate ≤ 5 V/ s.

¶This is the difference between positive-going input threshold voltage, VIT+, and negative-going input threshold voltage, VIT±.

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