ST 74LVC373A User Manual

■5V TOLERANT INPUTS

■HIGH SPEED: tPD = 6.8ns (MAX.) at VCC = 3V

■POWER DOWN PROTECTION ON INPUTS AND OUTPUTS

■SYMMETRICAL OUTPUT IMPEDANCE: |IOH| = IOL = 24mA (MIN) at VCC = 3V

■PCI BUS LEVELS GUARANTEED AT 24 mA

■BALANCED PROPAGATION DELAYS: tPLH tPHL

■OPERATING VOLTAGE RANGE:

VCC(OPR) = 1.65V to 3.6V (1.2V Data Retention)

■PIN AND FUNCTION COMPATIBLE WITH 74 SERIES 373

■LATCH-UP PERFORMANCE EXCEEDS 500mA (JESD 17)

■ESD PERFORMANCE:

HBM > 2000V (MIL STD 883 method 3015); MM > 200V

DESCRIPTION

The 74LVC373A is a low voltage CMOS OCTAL D-TYPE LATCH fabricated with sub-micron silicon gate and double-layer metal wiring C2MOS technology. It is ideal for 1.65 to 3.6 VCC operations and low power and low noise applications.

These 8 bit D-Type latch are controlled by a latch enable input (LE) and an output enable input (OE). While the LE inputs is held at a high level, the Q

PIN CONNECTION AND IEC LOGIC SYMBOLS

74LVC373A

OCTAL D-TYPE LATCH HIGH PERFORMANCE

SOP		TSSOP
ORDER CODES
PACKAGE	TUBE	T & R
SOP	74LVC373AM	74LVC373AMTR
TSSOP		74LVC373ATTR

outputs will follow the data input precisely or inversely. When the LE is taken low, the Q outputs will be latched precisely or inversely at the logic level of D input data. While the (OE) input is low, the 8 outputs will be in a normal logic state (high or low logic level) and while high level the outputs will be in a high impedance state.

This device is designed to interface directly High Speed CMOS systems with TTL and NMOS components.

It has more speed performance at 3.3V than 5V AC/ACT family, combined with a lower power consumption.

All inputs are equipped with protection circuits against static discharge, giving them 2KV ESD immunity and transient excess voltage.

February 2002

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74LVC373A

INPUT AND OUTPUT EQUIVALENT CIRCUIT

PIN DESCRIPTION

PIN No	SYMBOL	NAME AND FUNCTION
1	OE	Asynchronous Master
		Reset (Active LOW)
2, 5, 6, 9, 12,	Q0 to Q7	3-State Outputs
15, 16,19
3, 4, 7, 8, 13,	D0 to D7	Data Inputs
14, 17, 18
11	LE	Latch Enable Input
10	GND	Ground (0V)
20	VCC	Positive Supply Voltage

TRUTH TABLE

		INPUTS		OUTPUT
	OE	LE	D	Q
	H	X	X	Z
	L	L	X	NO
				CHANGE
	L	H	L	L
	L	H	H	H
	X : Don't Care
	Z :High Impedance

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 (VCC = 0V)	-0.5 to +7.0	V
VO	DC Output Voltage (High or Low State) (note 1)	-0.5 to VCC + 0.5	V
IIK	DC Input Diode Current	- 50	mA
IOK	DC Output Diode Current (note 2)	- 50	mA
IO	DC Output Current	± 50	mA
ICC or IGND	DC VCC or Ground Current per Supply Pin	± 100	mA
Tstg	Storage Temperature	-65 to +150	°C
TL	Lead Temperature (10 sec)	300	°C

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

1)IO absolute maximum rating must be observed

2)VO < GND

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			74LVC373A
RECOMMENDED OPERATING CONDITIONS
Symbol	Parameter	Value	Unit
VCC	Supply Voltage (note 1)	1.65 to 3.6	V
VI	Input Voltage	0 to 5.5	V
VO	Output Voltage (VCC = 0V)	0 to 5.5	V
VO	Output Voltage (High or Low State)	0 to VCC	V
IOH, IOL	High or Low Level Output Current (VCC = 3.0 to 3.6V)	± 24	mA
IOH, IOL	High or Low Level Output Current (VCC = 2.7 to 3.0V)	± 12	mA
IOH, IOL	High or Low Level Output Current (VCC = 2.3 to 2.7V)	± 8	mA
IOH, IOL	High or Low Level Output Current (VCC = 1.65 to 2.3V)	± 4	mA
Top	Operating Temperature	-55 to 125	°C
dt/dv	Input Rise and Fall Time (note 2)	0 to 10	ns/V

1)Truth Table guaranteed: 1.2V to 3.6V

2)VIN from 0.8V to 2V at VCC = 3.0V

DC SPECIFICATIONS

Symbol	Parameter
VIH	High Level Input
	Voltage
VIL	Low Level Input
	Voltage
VOH	High Level Output
	Voltage

VOL	Low Level Output
	Voltage

II	Input Leakage
	Current
Ioff	Power Off Leakage
	Current
IOZ	High Impedance
	Output Leakage
	Current
ICC	Quiescent Supply
	Current
ICC	ICC incr. per Input

	Test Condition			Value
VCC			-40 to 85 °C		-55 to 125 °C		Unit
(V)			Min.	Max.	Min.	Max.
1.65 to	1.95		0.65VCC		0.65VCC
2.3 to	2.7		1.7		1.7		V
2.7 to	3.6		2		2
1.65 to	1.95			0.35VCC		0.35VCC
2.3 to	2.7			0.7		0.7	V
2.7 to	3.6			0.8		0.8
1.65 to 3.6		IO=-100 μA	VCC-0.2		VCC-0.2
1.65		IO=-4 mA	1.2		1.2
2.3		IO=-8 mA	1.7		1.7		V
2.7		IO=-12 mA	2.2		2.2
3.0		IO=-18 mA	2.4		2.4
3.0		IO=-24 mA	2.2		2.2
1.65 to 3.6		IO=100 μA		0.2		0.2
1.65		IO=4 mA		0.45		0.45
2.3		IO=8 mA		0.7		0.7	V
2.7		IO=12 mA		0.4		0.4
3.0		IO=24 mA		0.55		0.55
3.6		VI = 0 to 5.5V		± 5		± 5	μA
0		VI or VO = 5.5V		10		10	μA
3.6		VI = VIH orVIL		± 10		± 10	μA
		VO = 0 to 5.5V
		VI = VCC or GND		10		10
3.6		VI or VO = 3.6 to		± 10		± 10	μA
		5.5V
2.7 to	3.6	VIH = VCC-0.6V		500		500	μA

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