Texas Instruments TL7757CD, TL7757MLP, TL7757MDR, TL7757MD, TL7757IPK Datasheet

TL7757 SUPPLY-VOLTAGE SUPERVISOR AND PRECISION VOLTAGE DETECTOR

SLVS041E ± SEPTEMBER 1991 ± REVISED JULY 1999

D D

D D

					D PACKAGE
Power-On Reset Generator					(TOP VIEW)
Automatic Reset Generation After Voltage								NC
	RESET				1	8
Drop
	VCC				2	7		NC
Low Standby Current . . . 20 A
	NC				3	6		NC
Reset Output Defined When VCC	GND				4	5		NC
Exceeds 1 V

D D D

D D

	Complementary Reset Output	NC ±No internal connection
	True and Complementary Reset Outputs	LP PACKAGE
	Precision Threshold Voltage
		(TOP VIEW)
	4.55 V ± 120 mV
	High Output Sink Capability . . . 20 mA		GND
	Comparator Hysteresis Prevents Erratic
			VCC
	Resets
			RESET

description

The TL7757 is a supply-voltage supervisor designed for use 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 output becomes active (low) to prevent undefined operation. If the supply voltage drops

below threshold voltage level (VIT±), the RESET output goes to the active (low) level until the supply undervoltage fault condition is eliminated.

The TL7757C is characterized for operation from 0°C to 70°C. The TL7757I is characterized for operation from ±40°C to 85°C.

PK PACKAGE (TOP VIEW)

VCC GND RESET

GND is in electrical contact with the tab.

AVAILABLE OPTIONS

		PACKAGED DEVICES			CHIP FORM
	TA
		SMALL OUTLINE	TO-226AA	SOT-89
					(Y)
		(D)	(LP)	(PK)
	0°C to 70°C	TL7757CD	TL7757CLP	TL7757CPK	TL7757Y
	±40°C to 85°C	TL7757ID	TL7757ILP	TL7757IPK

D and LP packages are available taped and reeled. Add the suffix R to device type (e.g.,

TL7757CDR). Chip forms are tested at 25°C.

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

TL7757

SUPPLY-VOLTAGE SUPERVISOR

AND PRECISION VOLTAGE DETECTOR

SLVS041E ± SEPTEMBER 1991 ± REVISED JULY 1999

equivalent schematic

			VCC					RESET
	R2				Q8	Q11	R15
		Q2
			Q5	R12			Q15	Q19
	R3
		R5					Q13
							Q17	Q21
			R11
R1							C2	R16
	R4			Q7	Q9			Q20
		R6	R10
							R14
			Q6				Q18
			R8
		Q3	Q4	C1	Q10	Q12	Q14
			R9				Q16	R18
	Q1
		R7			R13

GND

ACTUAL DEVICE

COMPONENT COUNT

Transistors 27

Resistors 20

Capacitors 2

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

Supply voltage range, VCC (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	±0.3 V to 20 V
Offstate output voltage range (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	±0.3 V to 20 V
Output current, IO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	. . . . . . . 30 mA
Package thermal impedance, θJA (see Notes 2 and 3): D package . . . . . . . . . . . . . . . . . . . . . .	. . . . . . 97°C/W
LP package . . . . . . . . . . . . . . . . . . . . .	. . . . . 156°C/W
PK package . . . . . . . . . . . . . . . . . . . . .	. . . . . . 52°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 network terminal ground.

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.

2	POST OFFICE BOX 655303 •DALLAS, TEXAS 75265

TL7757

SUPPLY-VOLTAGE SUPERVISOR

AND PRECISION VOLTAGE DETECTOR

SLVS041E ± SEPTEMBER 1991 ± REVISED JULY 1999

recommended operating conditions

			MIN	MAX	UNIT
	Supply voltage, VCC		1	7	V
	High-level output voltage, VOH			15	V
	Low-level output current, IOL			20	mA
	Operating free-air temperature, TA	TL7757C	0	70	°C
		TL7757I	±40	85

electrical characteristics at specified free-air temperature

	PARAMETER	TEST CONDITIONS			TA		TL7757C			UNIT
						MIN	TYP		MAX
VIT ±	Negative-going input threshold voltage at VCC				25°C	4.43	4.55		4.67	V
					0°C to 70°C	4.4			4.7
Vhys²	Hysteresis at VCC				25°C	40	50		60	mV
					0°C to 70°C	30			70
VOL	Low-level output voltage	IOL = 20 mA,		VCC = 4.3 V	25°C		0.4		0.8	V
					0°C to 70°C				0.8
IOH	High-level output current	VCC = 7 V,		VOH = 15 V,	25°C				1	µA
		See Figure 1			0°C to 70°C				1
³	Power-up reset voltage	RL = 2.2 kΩ,			25°C		0.8		1	V
Vres		VCC slew rate ≤ 5 V/µs			0°C to 70°C				1.2
		VCC = 4.3 V			25°C		1400		2000
										µA
ICC	Supply current				0°C to 70°C				2000
		VCC = 5.5 V			0°C to 70°C				40
² This is the difference between positive-going input threshold voltage, V			IT+	, and negative-going input threshold voltage, V				.
								IT ±

³ This is the lowest voltage at which RESET becomes active.

switching characteristics at specified free-air temperature

	PARAMETER	TEST CONDITIONS			TA		TL7757C		UNIT
						MIN	TYP	MAX
tPLH	Propagation delay time, low-to-high-level	VCC slew rate ≤ 5 V/		s,	25°C		3.4	5	µs
	output	See Figures 2 and 3			0°C to 70°C			5
tPHL	Propagation delay time, high-to-low-level	See Figures 2 and 3			25°C		2	5	µs
	output				0°C to 70°C			5
tr	Rise time	VCC slew rate ≤ 5 V/		s,	25°C		0.4	1	µs
		See Figures 2 and 3			0°C to 70°C			1
tf	Fall time	See Figures 2 and 3			25°C		0.05	1	µs
					0°C to 70°C			1
tw(min)	Minimum pulse duration at VCC for output				25°C			5	µs
	response				0°C to 70°C			5

POST OFFICE BOX 655303 •DALLAS, TEXAS 75265

3

TL7757

SUPPLY-VOLTAGE SUPERVISOR

AND PRECISION VOLTAGE DETECTOR

SLVS041E ± SEPTEMBER 1991 ± REVISED JULY 1999

electrical characteristics at specified free-air temperature

	PARAMETER	TEST CONDITIONS		TA		TL7757I			UNIT
					MIN	TYP		MAX
VIT ±	Negative-going input threshold voltage at VCC			25°C	4.43	4.55		4.67	V
				±40°C to 85°C	4.4			4.7
Vhys²	Hysteresis at VCC			25°C	40	50		60	mV
				±40°C to 85°C	30			70
VOL	Low-level output voltage	IOL = 20 mA,	VCC = 4.3 V	25°C		0.4		0.8	V
				±40°C to 85°C				0.8
IOH	High-level output current	VCC = 7 V,	VOH = 15 V,	25°C				1	µA
		See Figure 1		±40°C to 85°C				1
³	Power-up reset voltage	RL = 2.2 kΩ,		25°C		0.8		1	V
Vres		VCC slew rate ≤ 5 V/µs		±40°C to 85°C				1.2
		VCC = 4.3 V		25°C		1400		2000
									µA
ICC	Supply current			±40°C to 85°C				2100
		VCC = 5.5 V		±40°C to 85°C				40
² This is the difference between positive-going input threshold voltage, V			, and negative-going input threshold voltage, V				.
			IT+				IT ±

³ This is the lowest voltage at which RESET becomes active.

switching characteristics at specified free-air temperature

	PARAMETER	TEST CONDITIONS	TA		TL7757I		UNIT
				MIN	TYP	MAX
tPLH	Propagation delay time, low-to-high-level output	VCC slew rate ≤ 5 V/µs,	25°C		3.4	5	µs
		See Figures 2 and 3	±40°C to 85°C			5
tPHL	Propagation delay time, high-to-low-level output	See Figures 2 and 3	25°C		2	5	µs
			±40°C to 85°C			5
			25°C		0.4	1
tr	Rise time	VCC slew rate ≤ 5 V/ s,					µs
		See Figures 2 and 3	±40°C to 85°C			1
tf	Fall time	See Figures 2 and 3	25°C		0.05	1	µs
			±40°C to 85°C			1
tw(min)	Minimum pulse duration at VCC for output		25°C			5	µs
	response		±40°C to 85°C			5

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