ST 74V1G77 User Manual

74V1G77

74V1G77

SINGLE D-TYPE LATCH

■HIGH SPEED: tPD = 4.4ns (TYP.) at VCC = 5V

■LOW POWER DISSIPATION: ICC = 1μA(MAX.) at TA=25°C

■HIGH NOISE IMMUNITY: VNIH = VNIL = 28% VCC (MIN.)

■POWER DOWN PROTECTION ON INPUTS

■SYMMETRICAL OUTPUT IMPEDANCE: |IOH| = IOL = 8mA (MIN) at VCC = 4.5V

■BALANCED PROPAGATION DELAYS: tPLH tPHL

■OPERATING VOLTAGE RANGE: VCC(OPR) = 2V to 5.5V

■IMPROVED LATCH-UP IMMUNITY

DESCRIPTION

SOT23-5L SOT323-5L

ORDER CODES

PACKAGE	T & R
SOT23-5L	74V1G77STR
SOT323-5L	74V1G77CTR

The 74V1G77 is an advanced high-speed CMOS SINGLE D-TYPE LATCH fabricated with sub-micron silicon gate and double-layer metal wiring C2MOS technology. It is designed to operate from 2V to 5.5V, making this device ideal for portable applications.

The single D-Type latch is controlled by a Latch Enable Input (LE).

While the LE input is held at a high level, the Q output will follow the data input precisely. When

the LE input is taken low the Q output is latched precisely at the logic level of D input data.

Power down protection is provided on inputs and 0 to 7V can be accepted on inputs with no regard to the supply voltage. This device can be used to interface 5V to 3V. It’s available in the commercial and extended temperature range.

All inputs and output are equipped with protection circuits against static discharge, giving them ESD immunity and transient excess voltage.

PIN CONNECTION AND IEC LOGIC SYMBOLS

July 2001

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74V1G77

INPUT EQUIVALENT CIRCUIT	PIN DESCRIPTION
	PIN No	SYMBOL	NAME QND FUNCTION
	1	D	Data Input
	2	LE	Latch Enable Input
	4	Q	Data Output
	3	GND	Ground (0V)
	5	VCC	Positive Supply Voltage

TRUTH TABLE
D	LE	Q
L	L	No Change *
H	L	No Change *
L	H	Qn
H	H	Qn
(*) Q output is latched at the time when the le input is taken low logic
level.

ABSOLUTE MAXIMUM RATINGS

Symbol	Parameter	Value	Unit
VCC	Supply Voltage	-0.5 to +7.0	V
VI	DC Input Voltage	-0.5 to +7.0	V
VO	DC Output Voltage	-0.5 to VCC + 0.5	V
IIK	DC Input Diode Current	- 20	mA
IOK	DC Output Diode Current	± 20	mA
IO	DC Output Current	± 25	mA
ICC or IGND	DC VCC or Ground Current	± 50	mA
Tstg	Storage Temperature	-65 to +150	°C
TL	Lead Temperature (10 sec)	260	°C

Absolute Maximum Ratings are those values beyond which damage to the device may occur. Functional operation under these conditions is not implied.

RECOMMENDED OPERATING CONDITIONS

	Symbol	Parameter	Value	Unit
	VCC	Supply Voltage	2 to 5.5	V
	VI	Input Voltage	0 to 5.5	V
	VO	Output Voltage	0 to VCC	V
	Top	Operating Temperature	-55 to 125	°C
	dt/dv	Input Rise and Fall Time (note 1) (VCC = 3.3 ± 0.3V)	0 to 100	ns/V
		(VCC = 5.0 ± 0.5V)	0 to 20	ns/V

1) VIN from 30% to 70% of VCC

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74V1G77

DC SPECIFICATIONS

			Test Condition						Value
Symbol	Parameter	VCC				TA = 25°C			-40 to 85°C		-55 to 125°C		Unit
		(V)			Min.		Typ.	Max.	Min.	Max.	Min.	Max.
VIH	High Level Input	2.0			1.5				1.5		1.5
	Voltage	3.0 to			0.7VCC				0.7VCC		0.7VCC		V
		5.5
VIL	Low Level Input	2.0						0.5		0.5		0.5
	Voltage	3.0 to						0.3VCC		0.3VCC		0.3VCC	V
		5.5
VOH	High Level Output	2.0		IO=-50 μA	1.9		2.0		1.9		1.9
	Voltage
		3.0		IO=-50 μA	2.9		3.0		2.9		2.9
		4.5		IO=-50 μA	4.4		4.5		4.4		4.4		V
		3.0		IO=-4 mA	2.58				2.48		2.4
		4.5		IO=-8 mA	3.94				3.8		3.7
VOL	Low Level Output	2.0		IO=50 μA			0.0	0.1		0.1		0.1
	Voltage
		3.0		IO=50 μA			0.0	0.1		0.1		0.1
		4.5		IO=50 μA			0.0	0.1		0.1		0.1	V
		3.0		IO=4 mA				0.36		0.44		0.55
		4.5		IO=8 mA				0.36		0.44		0.55
II	Input Leakage	0 to		VI = 5.5V or GND				± 0.1		± 1		± 1	μA
	Current	5.5
ICC	Quiescent Supply	5.5		VI = VCC or GND				1		10		20	μA
	Current

AC ELECTRICAL CHARACTERISTICS (Input tr = tf = 3ns)

		Test Condition							Value
Symbol	Parameter	VCC	CL		TA = 25°C				-40 to 85°C		-55 to 125°C		Unit
		(V)	(pF)		Min.	Typ.	Max.		Min.	Max.	Min.	Max.
tPLH tPHL	Propagation Delay	3.3(*)	15			6.2		9.0	1.0	10.5	1.0	11.5
	Time LE to Q
		3.3(*)	50			6.8		10.0	1.0	11.5	1.0	13.0	ns
		5.0(**)	15			4.4		6.5	1.0	7.5	1.0	8.5
		5.0(**)	50			4.8		7.0	1.0	8.0	1.0	9.0
tPLH tPHL	Propagation Delay	3.3(*)	15			7.2		10.0	1.0	11.5	1.0	13.0
	Time D to Q
		3.3(*)	50			7.9		11.0	1.0	12.5	1.0	14.0	ns
		5.0(**)	15			4.4		6.5	1.0	7.5	1.0	8.5
		5.0(**)	50			4.8		7.0	1.0	8.0	1.0	9.0
tW	LE Pulse Width,	3.3(*)			4.0				4.0		4.0		ns
	HIGH
		5.0(**)			3.0				3.0		3.0
ts	Setup Time D to	3.3(*)			3.0				3.0		3.0		ns
	LE, HIGH or LOW
		5.0(**)			2.0				2.0		2.0
th	Hold Time D to LE,	3.3(*)			1.0				1.0		1.0		ns
	HIGH or LOW
		5.0(**)			1.0				1.0		1.0
(*) Voltage	range is 3.3V ± 0.3V
(**) Voltage range is 5.0V ± 0.5V
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