ST 74V1G79 User Manual

74V1G79CTR

74V1G79

SINGLE POSITIVE EDGE TRIGGERED

D-TYPE FLIP-FLOP

■	HIGH SPEED:
	fMAX = 180MHz (TYP.) at VCC = 5V
■	LOW POWER DISSIPATION:
	ICC = 1μA(MAX.) at TA=25°C
■	HIGH NOISE IMMUNITY:
	VNIH = VNIL = 28% VCC (MIN.)	SOT23-5L	SOT323-5L
■	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

The 74V1G79 is an advanced high-speed CMOS SINGLE POSITIVE EDGE TRIGGERED D-TYPE FLIP-FLOP 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.

This D-Type flip-flop is controlled by a clock input (CK). On the positive transition of the clock, the Q output will be set to the logic state that was setup at the D input.

ORDER CODES

PACKAGE	T & R
SOT23-5L	74V1G79STR
SOT323-5L	74V1G79CTR

Following the hold time interval, data at the D input can be changed without affecting the level at the output. 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 systems.

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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74V1G79

INPUT EQUIVALENT CIRCUIT	PIN DESCRIPTION
	PIN No	SYMBOL	NAME AND FUNCTION
	1	D	Data Input
	2	CK	Clock Input (Positive
			Edge)
	4	Q	Flip-Flop Output
	3	GND	Ground (0V)
	5	VCC	Positive Supply Voltage

TRUTH TABLE

D		CK			Q
L					L
H					H
L					Qn
H					Qn

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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74V1G79

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				5.4		8.0	1.0	9.5	1.0	10.5
	Time CK to Q
		3.3(*)	50				5.9		8.5	1.0	10.0	1.0	11.0	ns
		5.0(**)	15				3.9		5.5	1.0	6.5	1.0	7.5
		5.0(**)	50				4.5		6.5	1.0	7.5	1.0	8.5
tW	CK Pulse Width,	3.3(*)							4.0		4.0		4.0	ns
	HIGH or LOW
		5.0(**)							3.0		3.0		3.0
ts	Setup Time D to	3.3(*)							4.0		4.0		4.0	ns
	CK, HIGH or LOW
		5.0(**)							3.0		3.0		3.0
th	Hold Time D to CK,	3.3(*)							1.0		1.0		1.0	ns
	HIGH or LOW
		5.0(**)							1.0		1.0		1.0
fMAX	Maximum Clock	3.3(*)	50		100		120			90		90		MHz
	Frequency
		5.0(**)	50		165		180			150		150

(*) Voltage range is 3.3V ± 0.3V (**) Voltage range is 5.0V ± 0.5V

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