Fairchild Semiconductor 74VCX16244MTDX, 74VCX16244MTD, 74VCX16244CW, 74ALVC16244MTDX, 74ALVC16244MTD Datasheet

October 1996

Revised April 1999

74VCX16244

Low Voltage 16-Bit Buffer/Line Driver with 3.6V Tolerant Inputs and Outputs

General Description

The VCX16244 contains sixteen non-inverting buffers with 3-STATE outputs to be employed as a memory and address driver, clock driver, or bus oriented transmitter/ receiver. The device is nibble (4-bit) controlled. Each nibble has separate 3-STATE control inputs which can be shorted together for full 16-bit operation.

The 74VCX16244 is designed for low voltage (1.65V to 3.6V) VCC applications with I/O capability up to 3.6V.

The 74VCX16244 is fabricated with an advanced CMOS technology to achieve high speed operation while maintaining low CMOS power dissipation.

Features

■1.65V–3.6V VCC supply operation

■3.6V tolerant inputs and outputs

■tPD

2.5ns max for 3.0V to 3.6V VCC

3.0 ns max for 2.3V to 2.7V VCC

6.0ns max for 1.65V to 1.95V VCC

■Power-off high impedance inputs and outputs

■Supports live insertion and withdrawal (Note 1)

■Static Drive (IOH/IOL)

±24 mA @ 3.0V VCC

±18 mA @ 2.3V VCC

±6 mA @ 1.8V VCC

■Uses patented noise/EMI reduction circuitry

■Latch-up performance exceeds 300 mA

■ESD performance:

Human body model > 2000V

Machine model > 200V

Note 1: To ensure the high-impedance state during power up or power down, OE should be tied to VCC through a pull-up resistor; the minimum value of the resistor is determined by the current-sourcing capability of the driver.

Ordering Code:

Order Number	Package Number	Package Description
74VCX16244MTD	MTD48	48-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 6.1mm Wide

Devices also available in Tape and Reel. Specify by appending the suffix letter “X” to the ordering code.

Logic Symbol	Pin Descriptions
		Pin Names			Description
				n	Output Enable Input (Active LOW)
			OE
		I0–I15			Inputs
		O0–O15			Outputs

Outputs and Inputs Tolerant 6V.3 with Driver Buffer/Line Bit-16 Voltage Low 74VCX16244

© 1999 Fairchild Semiconductor Corporation

DS012168.prf

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74VCX16244

Connection Diagram

Functional Description

The 74VCX16244 contains sixteen non-inverting buffers with 3-STATE outputs. The device is nibble (4 bits) controlled with each nibble functioning identically, but independent of each other. The control pins may be shorted together to obtain full 16-bit operation.The 3-STATE out-

Logic Diagram

Truth Tables

			Inputs	Outputs
			I0–I 3	O0–O 3
	OE1
	L		L	L
	L		H	H
	H		X	Z
			Inputs	Outputs
			I8-I11	O8–O 11
	OE3
	L		L	L
	L		H	H
	H		X	Z
			Inputs	Outputs
			I4-I7	O4-O7
	OE2
	L		L	L
	L		H	H
	H		X	Z
			Inputs	Outputs
			I12-I15	O12-O15
	OE4
	L		L	L
	L		H	H
	H		X	Z

H = HIGH Voltage Level

L = LOW Voltage Level

X = Immaterial (HIGH or LOW, inputs may not float)

Z = High Impedance

puts are controlled by an Output Enable (OEn) input. When

OEn is LOW, the outputs are in the 2-state mode. When

OEn is HIGH, the standard outputs are in the high impedance mode but this does not interfere with entering new data into the inputs.

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Absolute Maximum Ratings(Note 2)

Supply Voltage (VCC)	−0.5V to +4.6V
DC Input Voltage (VI)	−0.5V to +4.6V
Output Voltage (VO)	−0.5V to +4.6V
Outputs 3-STATED
Outputs Active (Note 3)	−0.5V to VCC +0.5V
DC Input Diode Current (IIK) VI < 0V	−50 mA
DC Output Diode Current (IOK)
VO < 0V	−50 mA
VO > VCC	+50 mA
DC Output Source/Sink Current
(IOH/IOL)	±50 mA
DC VCC or GND Current per	±100 mA
Supply Pin (ICC or GND)
Storage Temperature Range (TSTG)	−65°C to +150°C

Recommended Operating

Conditions (Note 4)

Power Supply
Operating	1.65V to 3.6V
Data Retention Only	1.2V to 3.6V
Input Voltage	−0.3V to +3.6V
Output Voltage (VO)
Output in Active States	0V to VCC
Output in 3-State	0.0V to 3.6V
Output Current in IOH/IOL
VCC = 3.0V to 3.6V	±24 mA
VCC = 2.3V to 2.7V	±18 mA
VCC = 1.65V to 2.3V	±6 mA
Free Air Operating Temperature (TA)	−40°C to +85°C
Minimum Input Edge Rate ( t/ V)
VIN = 0.8V to 2.0V, VCC = 3.0V	10 ns/V

Note 2: The Absolute Maximum Ratings are those values beyond which the safety of the device cannot be guaranteed. The device should not be operated at these limits. The parametric values defined in the Electrical Characteristics tables are not guaranteed at the Absolute Maximum Ratings. The “Recommended Operating Conditions” table will define the conditions for actual device operation.

Note 3: IO Absolute Maximum Rating must be observed.

Note 4: Floating or unused inputs must be held HIGH or LOW.

DC Electrical Characteristics (2.7V < VCC ≤ 3.6V)

	Symbol	Parameter	Conditions	VCC	Min	Max	Units
				(V)
	VIH	HIGH Level Input Voltage		2.7–3.6	2.0		V
	VIL	LOW Level Input Voltage		2.7–3.6		0.8	V
	VOH	HIGH Level Output Voltage	IOH = −100 μA	2.7–3.6	VCC − 0.2		V
			IOH = −12 mA	2.7	2.2		V
			IOH = −18 mA	3.0	2.4		V
			IOH = −24 mA	3.0	2.2		V
	VOL	LOW Level Output Voltage	IOL = 100 μA	2.7–3.6		0.2	V
			IOL = 12 mA	2.7		0.4	V
			IOL = 18 mA	3.0		0.4	V
			IOL = 24 mA	3.0		0.55	V
	II	Input Leakage Current	0 ≤ VI ≤ 3.6V	2.7–3.6		±5.0	μA
	IOZ	3-STATE Output Leakage	0 ≤ VO ≤ 3.6V	2.7–3.6		±10	μA
			VI = VIH or VIL
	IOFF	Power-OFF Leakage Current	0 ≤ (VI, VO) ≤ 3.6V	0		10	μA
	ICC	Quiescent Supply Current	VI = VCC or GND	2.7–3.6		20	μA
			VCC ≤ (VI, VO) ≤ 3.6V (Note 5)	2.7–3.6		±20	μA
	ICC	Increase in ICC per Input	VIH = VCC −0.6V	2.7–3.6		750	μA

Note 5: Outputs disabled or 3-STATE only.

74VCX16244

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