IDT IDT54FCT16244T, IDT54FCT16244AT, IDT54FCT16244CT, IDT54FCT16244ET, IDT54FCT162244T User Manual

FAST CMOS 16-BIT	IDT54/74FCT16244T/AT/CT/ET
BUFFER/LINE DRIVER	IDT54/74FCT162244T/AT/CT/ET
	IDT54/74FCT166244T/AT/CT
	IDT54/74FCT162H244T/AT/CT/ET

Integrated Device Technology, Inc.

FEATURES:

•Common features:

–0.5 MICRON CMOS Technology

–High-speed, low-power CMOS replacement for ABT functions

–Typical tSK(o) (Output Skew) < 250ps

–Low input and output leakage ≤ 1μA (max.)

–ESD > 2000V per MIL-STD-883, Method 3015; > 200V using machine model (C = 200pF, R = 0)

–Packages include 25 mil pitch SSOP, 19.6 mil pitch TSSOP, 15.7 mil pitch TVSOP and 25 mil pitch Cerpack

–Extended commercial range of -40°C to +85°C

•Features for FCT16244T/AT/CT/ET:

–High drive outputs (-32mA IOH, 64mA IOL)

–Power off disable outputs permit “live insertion”

–Typical VOLP (Output Ground Bounce) < 1.0V at VCC = 5V, TA = 25°C

•Features for FCT162244T/AT/CT/ET:

–Balanced Output Drivers: ±24mA (commercial),

±16mA (military)

–Reduced system switching noise

–Typical VOLP (Output Ground Bounce) < 0.6V at VCC = 5V,TA = 25°C

•Features for FCT166244T/AT/CT:

–Light Drive Balanced Output: ±8mA (commercial),

±6mA (military)

–Minimal system switching noise

–Typical VOLP (Output Ground Bounce) < 0.25V at VCC = 5V,TA = 25°C

•Features for FCT162H244T/AT/CT/ET:

–Bus-Hold retains last active bus state during 3-state

–Eliminates the need for external pull up resistors

DESCRIPTION:

The16-BitBuffer/LineDriverisforbusinterfaceorsignalbuffering applications requiring high speed and low power dissipation. These devices have a flow through pin organization, and shrink packaging to simplify board layout. All inputs are designed with hysteresis for improvednoise margin. The three-state controlsallow independent 4-bit, 8-bit or combined 16-bit operation. These parts are plug in replacementsfor54/74ABT16244wherehigherspeed,lowernoise or lower power dissipation levels are desired.

The FCT16244T/AT/CT/ET are ideally suited for driving high capacitance loads (>200pF) and low impedance backplanes. These "high drive" buffers are designed with power off disable capability to allow "live insertion" of boards when used in a backplane interface.

The FCT162244T/AT/CT/ET have balanced output current levels and current limiting resistors. These offer low ground bounce, minimal undershoot, and controlled output fall times, reducing the need for external series terminating resistors while still providing very high speed operation for loads of less than 200pF.

The FCT166244T/AT/CT are suited for very low noise, point-to-point driving where there is a single receiver, or a very light lumped load (<100pF). The buffers are designed to limit the output current to levels which will avoid noise and ringing on the signal lines without using external series terminating resistors.

The FCT162H244T/AT/CT/ET have "Bus-Hold" which retains the input's last state whenever the input goes to high impedance. This prevents "floating" inputs and eliminates the need for pull-up/down resistors.

FUNCTIONAL BLOCK DIAGRAM

1OE		3OE
1A1	1Y1	3A1	3Y1
1A2	1Y2	3A2	3Y2
1A3	1Y3	3A3	3Y3
1A4	1Y4	3A4	3Y4

2OE

2A1

2A2

2A3

2A4

The IDT logo is a registered trademark of Integrated Device Technology, Inc.

4OE

2Y1	4A1	4Y1
2Y2	4A2	4Y2
2Y3	4A3	4Y3
2Y4	4A4	4Y4
2544 drw 01		2544 drw 02

MILITARY AND COMMERCIAL TEMPERATURE RANGES		OCTOBER 1996
©1996 Integrated Device Technology, Inc.	5.2	DSC-2544/9

15

IDT54/74FCT16244T/AT/CT/ET, 162244T/AT/CT/ET,
166244T/AT/CT, 162H244T/AT/CT/ET FAST CMOS 16-BIT BUFFER/LINE DRIVER	MILITARY AND COMMERCIAL TEMPERATURE RANGES

PIN CONFIGURATIONS

1OE		1		48		2OE	1OE		1		48		2OE
1Y1		2		47		1A1	1Y1		2		47		1A1
1Y2		3		46		1A2	1Y2		3		46		1A2
GND		4		45		GND	GND		4		45		GND
1Y3		5		44		1A3	1Y3		5		44		1A3
1Y4		6		43		1A4	1Y4		6		43		1A4
VCC		7		42		VCC	VCC		7		42		VCC
2Y1		8		41		2A1	2Y1		8		41		2A1
2Y2		9		40		2A2	2Y2		9		40		2A2
GND		10		39		GND	GND		10		39		GND
2Y3		11		38		2A3	2Y3		11		38		2A3
2Y4		12	SO48-1	37		2A4	2Y4		12	E48-1	37		2A4
3Y1		13	SO48-2	36		3A1	3Y1		13		36		3A1
			SO48-3
3Y2		14		35		3A2	3Y2		14		35		3A2
GND		15		34		GND	GND		15		34		GND
3Y3		16		33		3A3	3Y3		16		33		3A3
3Y4		17		32		3A4	3Y4		17		32		3A4
VCC		18		31		VCC	VCC		18		31		VCC
4Y1		19		30		4A1	4Y1		19		30		4A1
4Y2		20		29		4A2	4Y2		20		29		4A2
GND		21		28		GND	GND		21		28		GND
4Y3		22		27		4A3	4Y3		22		27		4A3
4Y4		23		26		4A4	4Y4		23		26		4A4
4OE		24		25		3OE	4OE		24		25		3OE

SSOP/	2544 drw 03	2544 drw 04
TSSOP/TVSOP		CERPACK
TOP VIEW		TOP VIEW

PIN DESCRIPTION

Pin Names	Description
xOE	3–State Output Enable Inputs (Active LOW)
xAx	Data Inputs(1)
xYx	3-State Outputs
NOTE:	2544 tbl 01

1. On FCT16xH these pins have “Bus-hold”. All other pins are standard inputs, outputs or I/Os.

5.2

2

IDT54/74FCT16244T/AT/CT/ET, 162244T/AT/CT/ET,
166244T/AT/CT, 162H244T/AT/CT/ET FAST CMOS 16-BIT BUFFER/LINE DRIVER		MILITARY AND COMMERCIAL TEMPERATURE RANGES
ABSOLUTE MAXIMUM RATINGS(1)	FUNCTION TABLE(1)

Symbol	Description	Max.	Unit
VTERM(2)	Terminal Voltage with Respect to	–0.5 to +7.0	V
	GND
VTERM(3)	Terminal Voltage with Respect to	–0.5 to	V
	GND	VCC +0.5
TSTG	Storage Temperature	–65 to +150	°C
IOUT	DC Output Current	–60 to +120	mA
NOTES:		2544 lnk 03

1.Stresses greater than those listed under ABSOLUTE MAXIMUM RATINGS may cause permanent damage to the device. This is a stress rating only and functional operation of the device at these or any other conditions above those indicated in the operational sections of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect reliability.

2.All device terminals except FCT162XXXT and FCT166XXXT output and I/O terminals.

3.Output and I/O terminals for FCT162XXXT and FCT166XXXT.

	Inputs	Outputs
xOE	xAx	xYx
L	L	L
L	H	H
H	X	Z
NOTE:		2544 tbl 02

1.H = HIGH Voltage Level X = Don’t Care

L = LOW Voltage Level Z = High Impedance

CAPACITANCE (TA = +25°C, f = 1.0MHz)

Symbol	Parameter(1)	Conditions	Typ.	Max.	Unit
CIN	Input	VIN = 0V	3.5	6.0	pF
	Capacitance
COUT	Output	VOUT = 0V	3.5	8.0	pF
	Capacitance
NOTE:				2544 lnk 04

1. This parameter is measured at characterization but not tested.

DC ELECTRICAL CHARACTERISTICS OVER OPERATING RANGE (STANDARD PARTS)

Following Conditions Apply Unless Otherwise Specified:

Commercial: TA = –40°C to +85°C, VCC = 5.0V ± 10%; Military: TA = –55°C to +125°C, VCC = 5.0V ± 10%

Symbol	Parameter		Test Conditions(1)	Min.	Typ.(2)	Max.	Unit
VIH	Input HIGH Level	Guaranteed Logic HIGH Level		2.0	—	—	V
VIL	Input LOW Level	Guaranteed Logic LOW Level		—	—	0.8	V
II H	Input HIGH Current (Input pins)(5)	VCC = Max.	VI = VCC	—	—	±1	μA
	Input HIGH Current (I/O pins)(5)			—	—	±1
II L	Input LOW Current (Input pins)(5)		VI = GND	—	—	±1
	Input LOW Current (I/O pins)(5)			—	—	±1
IOZH	High Impedance Output Current	VCC = Max.	VO = 2.7V	—	—	±1	μA
IOZL	(3-State Output pins)(5)		VO = 0.5V	—	—	±1
VIK	Clamp Diode Voltage	VCC = Min., IIN = –18mA		—	–0.7	–1.2	V
IOS	Short Circuit Current	VCC = Max., VO = GND(3)		–80	–140	–225	mA
VH	Input Hysteresis		—	—	100	—	mV
ICCL	Quiescent Power Supply Current	VCC = Max., VIN = GND or VCC		—	5	500	μA
ICCH
ICCZ

NOTES:	2544 lnk 05

1.For conditions shown as Max. or Min., use appropriate value specified under Electrical Characteristics for the applicable device type.

2.Typical values are at Vcc = 5.0V, +25°C ambient.

3.Not more than one output should be tested at one time. Duration of the test should not exceed one second.

4.Duration of the condition can not exceed one second.

5.The test limit for this parameter is ± 5μA at TA = –55°C.

5.2

3