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

Integrated Device Technology, Inc.

FAST CMOS 16-BIT
BUFFER/LINE DRIVER

IDT54/74FCT16244T/AT/CT/ET

IDT54/74FCT162244T/AT/CT/ET

IDT54/74FCT166244T/AT/CT

IDT54/74FCT162H244T/AT/CT/ET

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 I

OH, 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

V

CC = 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

FUNCTIONAL BLOCK DIAGRAM

1OE

DESCRIPTION:

The 16-Bit Buffer/Line Driver is for bus interface or signal buffering
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
improved noise margin. The three-state controls allow independent
4-bit, 8-bit or combined 16-bit operation. These parts are plug in
replacements for 54/74ABT16244 where higher speed, lower noise
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.

3OE

A1

1
1A2

1

A3
A4

1

2OE

2A1
2A2

2

A3

A4

2

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

1Y1

Y2

1

Y3

1

Y4

1

Y1

2

2

Y2

2

Y3
Y4

2

2544 drw 01

3A1

3

A2

3

A3

A4

3

4OE

4A1

A2

4

A3

4

A4

4

Y1

3
3Y2

3

Y3
Y4

3

4Y1

Y2

4

Y3

4

Y4

4

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

1Y1
1Y2

GND

1Y3

1

Y4

VCC

Y1

2

2

Y2

GND

Y3

2

Y4

2

Y1

3
3Y2

GND

3

Y3

3

Y4

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17

SO48-1
SO48-2
SO48-3

48
47
46
45
44
43
42
41

40

39
38
37
36

35

34
33
32

2OE
1A1

A2

1

GND

1A3

A4

1

VCC

A1

2

A2

2

GND

A3

2

A4

2

A1

3

A2

3

GND

A3

3

A4

3

OE

1

1Y1
1Y2

GND

1Y3

1

Y4

VCC

2

Y1

2

Y2

GND

2

Y3

2

Y4

3

Y1

3Y2

GND

Y3

3

3

Y4

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17

E48-1

48
47
46
45
44
43
42
41

40

39
38
37
36

35

34
33
32

2OE
1A1

1

A2

GND

1A3

1

A4

VCC

2

A1

2

A2

GND

2

A3

2

A4

3

A1
A2

3

GND

3

A3

3

A4

V

CC

4

Y1
Y2

4

GND

4

Y3
Y4

4

4OE

18
19
20
21
22
23
24

SSOP/

TSSOP/TVSOP

TOP VIEW

31
30
29
28
27
26
25

VCC

A1

4

A2

4

GND

4

A3
A4

4
3OE

2544 drw 03

CC

V

4

Y1
Y2

4

GND

4

Y3

4

Y4

4OE

18
19
20
21
22
23
24

31
30
29
28
27
26
25

2544 drw 04

VCC

4

A1
A2

4

GND

4

A3

4

A4

3OE

CERPACK
TOP VIEW

PIN DESCRIPTION

Pin Names Description

x

OE

xAx Data Inputs
xYx 3-State Outputs

NOTE:

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

3–State Output Enable Inputs (Active LOW)

(1)

2544 tbl 01

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)

Symbol Description Max. Unit

(2)

VTERM
VTERM

Terminal Voltage with Respect to
GND

(3)

Terminal Voltage with Respect to
GND

–0.5 to +7.0 V

–0.5 to

CC +0.5

V

V

TSTG Storage Temperature –65 to +150 °C
IOUT DC Output Current –60 to +120 mA

NOTES:

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.

2544 lnk 03

FUNCTION TABLE

(1)

Inputs Outputs

x

OEOE xAx xYx

LLL
LHH
HXZ

NOTE:

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

C

IN

Input
Capacitance

C

OUT

Output
Capacitance

NOTE:

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

(1)

Conditions Typ. Max. Unit

VIN = 0V 3.5 6.0

V

OUT

= 0V 3.5 8.0

2544 tbl 02

pF

pF

2544 lnk 04

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.

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)

Input HIGH Current (I/O pins)

II L Input LOW Current (Input pins)

Input LOW Current (I/O pins)

(5)

VCC = Max. VI = VCC — — ±1 µA

(5)

(5)

VI = GND — — ±1

(5)

— — ±1

— — ±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:

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 T

A = –55°C.

(2)

Max. Unit

2544 lnk 05

5.2 3