ST 74LCX162244 User Manual

74LCX162244TTR

74LCX162244

LOW VOLTAGE CMOS 16-BIT BUS BUFFER (3-STATE) WITH 5V TOLERANT INPUTS AND OUTPUTS

■5V TOLERANT INPUTS AND OUTPUTS

■HIGH SPEED :

tPD = 4.4 ns (MAX.) at VCC = 3V

■POWER DOWN PROTECTION ON INPUTS AND OUTPUTS

■SYMMETRICAL OUTPUT IMPEDANCE: |IOH| = IOL = 12mA (MIN) at VCC = 3V

■PCI BUS LEVELS GUARANTEED AT 12 mA

■BALANCED PROPAGATION DELAYS: tPLH tPHL

■26Ω SERIE RESISTORS IN OUTPUTS

■OPERATING VOLTAGE RANGE:

VCC(OPR) = 2.0V to 3.6V (1.5V Data

Retention)

■PIN AND FUNCTION COMPATIBLE WITH 74 SERIES 162244

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

■ESD PERFORMANCE:

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

DESCRIPTION

The 74LCX162244 is a low voltage CMOS 16 BIT BUS BUFFER (NON-INVERTED) fabricated with sub-micron silicon gate and double-layer metal wiring C2MOS technology. It is ideal for low power and high speed 3.3V applications; it can be interfaced to 5V signal environment for both inputs and outputs.

Any nG output control governs four BUS BUFFERS. Output Enable input (nG) tied together gives full 16-bit operation.

When nG is LOW, the outputs are on. When nG is HIGH, the output are in high impedance state. This device is designed to be used with 3 state memory address drivers, etc.

The device circuits is including 26Ω series resistance in the outputs. These resistors permit to reduce line noise in high speed applications.

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

TSSOP

ORDER CODES

PACKAGE	TUBE	T & R
TSSOP		74LCX162244TTR

PIN CONNECTION

February 2003

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74LCX162244

INPUT AND OUTPUT EQUIVALENT CIRCUIT

	PIN DESCRIPTION			IEC LOGIC SYMBOLS
	PIN No		SYMBOL	NAME AND FUNCTION
		1	1G	Output Enable Input
	2, 3, 5, 6		1Y1 to 1Y4	Data Outputs
	8, 9, 11, 12		2Y1 to 2Y4	Data Outputs
	13, 14, 16, 17		3Y1 to 3Y4	Data Outputs
	19, 20, 22, 23		4Y1 to 4Y4	Data Outputs
		24	4G	Output Enable Input
		25	3G	Output Enable Input
	30, 29, 27, 26		4A1 to 4A4	Data Outputs
	36, 35, 33, 32		3A1 to 3A4	Data Outputs
	41, 40, 38, 37		2A1 to 2A4	Data Outputs
	47, 46, 44, 43		1A1 to 1A4	Data Outputs
		48	2G	Output Enable Input
	4, 10,	15, 21,	GND	Ground (0V)
	28, 34, 39, 45
	7, 18, 31, 42		VCC	Positive Supply Voltage
	TRUTH TABLE
			INPUTS	OUTPUT
		G	An	Yn
		L	L	L
		L	H	H
		H	X	Z
	X : Don‘t Care
	Z : High Impedance

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74LCX162244

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 (OFF State)	-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	DC Supply Current per Supply Pin	± 100	mA
IGND	DC 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

RECOMMENDED OPERATING CONDITIONS

Symbol	Parameter	Value	Unit
VCC	Supply Voltage (note 1)	2.0 to 3.6	V
VI	Input Voltage	0 to 5.5	V
VO	Output Voltage (OFF State)	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)	± 12	mA
IOH, IOL	High or Low Level Output Current (VCC = 2.7V )	± 8	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: 1.5V to 3.6V

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

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