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

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

DC ELECTRICAL CHARACTERISTICS OVER OPERATING RANGE (BUS-HOLD)

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

(5)

(5)

VCC = Max. VI = VCC ——±1µA

——±1

II H Input Standard Input

HIGH Standard I/O

(4)

Current

Bus-hold Input — — ±100

Bus-hold I/O — — ±100

II L Input Standard Input

LOW Standard I/O

(4)

Current

Bus-hold Input — — ±100

(5)

(5)

——±1

VI = GND — — ±1

Bus-hold I/O — — ±100
IBHH Bus Hold Bus-hold Input VCC = Min. VI = 2.0V –50 — — µA
IBHL Sustain

Current

(4)

V

I = 0.8V +50 — —

IOZH High Impedance Output Current VCC = Max. VO = 2.7V — — ±1 µA
IOZL (3-State Output pins)

(5,6)

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. Pins with Bus-hold are identified in the pin description.

5. The test limit for this parameter is ± 5µA at T

6. Does not include Bus-hold I/O pins.

A = –55°C.

(2)

Max. Unit

2544 lnk 06

5.2 4

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

OUTPUT DRIVE CHARACTERISTICS FOR FCT16244T

Symbol Parameter Test Conditions

IO Output Drive Current VCC = Max., VO = 2.5V

(3)

(1)

Min. Typ.

–50 —–180 mA

VOH Output HIGH Voltage VCC = Min. IOH = –3mA 2.5 3.5 — V

VIN = VIH or VIL IOH = –12mA MIL.

VOL Output LOW Voltage VCC = Min.

IN = VIH or VIL

V

IOFF Input/Output Power Off Leakage

(5)

VCC = 0V, VIN or VO ≤ 4.5V — — ±1 µA

OH = –15mA COM'L.

I
IOH = –24mA MIL.

OH = –32mA COM'L.

I
IOL = 48mA MIL.

OL = 64mA COM'L.

I

2.4 3.5 — V

2.0 3.0 — V

(4)

— 0.2 0.55 V

(2)

Max. Unit

2544 lnk 07

OUTPUT DRIVE CHARACTERISTICS FOR FCT162244T

Symbol Parameter Test Conditions

(1)

IODL Output LOW Current VCC = 5V, VIN = VIH or VIL, VOUT = 1.5V
IODH Output HIGH Current VCC = 5V, VIN = VIH or V IL,
VOH Output HIGH Voltage VCC = Min.

V

IN = VIH or VIL

VOL Output LOW Voltage VCC = Min.

V

IN = VIH or VIL

VOUT = 1.5V

IOH = –16mA MIL.
I

OH = –24mA COM'L.

IOL = 16mA MIL.
I

OL = 24mA COM'L.

(3)

(3)

Min. Typ.

60 115 200 mA

–60 –115 –200 mA

2.4 3.3 — V

— 0.3 0.55 V

(2)

Max. Unit

2544 lnk 08

OUPUT DRIVE CHARACTERISTICS FOR FCT166244T

Symbol Parameter Test Conditions

I

ODL

I

ODH

V

OH

V

OL

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

Output LOW Current VCC = 5V, V
Output HIGH Current VCC = 5V, V
Output HIGH Voltage VCC = Min.

IN

= V

IH

V

or V

Output LOW Voltage VCC = Min.

IN

= V

IH

V

A = –55°C.

or V

IN

= V

IH or VIL, VOUT

IN

= V

IH

IL

IL

or V

IL,VOUT

(1)

(3)

= 1.5V

(3)

= 1.5V

IOH = –6mA MIL.

OH

= –8mA COM'L.

I
IOL = 6mA MIL.

OL

= 8mA COM'L.

I

Min. Typ.

16 48 96 mA

–16 –48 –96 mA

2.4 3.3 — V

— 0.3 0.55 V

(2)

Max. Unit

2544 lnk 09

5.2 5

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

POWER SUPPLY CHARACTERISTICS

V

IN

= VCC

V

IN

= GND

(1)

Min. Typ.

— 0.5 1.5 mA

— 60 100

Symbol Parameter Test Conditions

∆I

I

CCD

CC

Quiescent Power Supply Current
TTL Inputs HIGH

Dynamic Power Supply

(4)

Current

VCC = Max.

= 3.4V

(3)

V

IN

VCC = Max.
Outputs Open
xOE = GND
One Input Toggling
50% Duty Cycle

I

C

Total Power Supply Current

(6)

VCC = Max.
Outputs Open

V

IN

= VCC

V

IN

= GND

— 0.6 1.5 mA

fi = 10MHz
50% Duty Cycle
x

OE

= GND

V

IN

V

IN

= 3.4V
= GND

— 0.9 2.3

One Bit Toggling
VCC = Max.

Outputs Open

V

IN

= VCC

V

IN

= GND

— 2.4 4.5

fi = 2.5MHz
50% Duty Cycle
xOE = GND

V

IN

V

IN

= 3.4V
= GND

— 6.4 16.5

Sixteen Bits Toggling

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 V

3. Per TTL driven input (V

4. This parameter is not directly testable, but is derived for use in Total Power Supply Calculations.

5. Values for these conditions are examples of the I

C = IQUIESCENT + IINPUTS + IDYNAMIC

6. I
IC = ICC + ∆ICC DHNT + ICCD (fCPNCP/2 + fiNi)

CC = Quiescent Current (ICCL, ICCH and ICCZ)

I

CC = Power Supply Current for a TTL High Input (VIN = 3.4V)

∆I

H = Duty Cycle for TTL Inputs High

D

T = Number of TTL Inputs at DH

N
ICCD = Dynamic Current Caused by an Input Transition Pair (HLH or LHL)
f

CP = Clock Frequency for Register Devices (Zero for Non-Register Devices)

CP = Number of Clock Inputs at fCP

N
fi = Input Frequency

i = Number of Inputs at fi

N

CC = 5.0V, +25°C ambient.

IN = 3.4V). All other inputs at VCC or GND.

CC formula. These limits are guaranteed but not tested.

(2)

Max. Unit

(5)

(5)

µ

A/

MHz

2544 tbl 10

5.2 6

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

SWITCHING CHARACTERISTICS OVER OPERATING RANGE FOR FCT16244T/FCT162244T

FCT16244T/162244T/166244T FCT16244AT/162244AT/166244AT

Com'l. Mil. Com'l. Mil.

Symbol Parameter Condition

tPLH
tPHL
tPZH

Propagation Delay
xAx to xYx

CL = 50pF

R

Output Enable Time 1.5 8.0 1.5 8.5 1.5 6.2 1.5 6.5 ns

(1)

L = 500Ω

tPZL
tPHZ

Output Disable Time 1.5 7.0 1.5 7.5 1.5 5.6 1.5 5.9 ns
tPLZ
tSK(o) Output Skew

Symbol Parameter Condition

tPLH
tPHL
tPZH

Propagation Delay

xAx to xYx

Output Enable Time 1.5 5.8 1.5 6.5 1.5 4.4 — — ns

(3)

CL = 50pF

L = 500Ω

R

(1)

tPZL
tPHZ

Output Disable Time 1.5 5.2 1.5 5.7 1.5 3.6 — — ns
tPLZ
tSK(o) Output Skew

NOTES:

1. See test circuit and waveforms.

2. Minimum limits are guaranteed but not tested on Propagation Delays.

3. Skew between any two outputs of the same package switching in the same direction. This parameter is guaranteed by design.

(3)

Min.

(2)

Max. Min.

(2)

Max. Min.

(2)

Max. Min.

(2)

Max. Unit

1.5 6.5 1.5 7.0 1.5 4.8 1.5 5.1 ns

— 0.5 — 0.5 — 0.5 — 0.5 ns

2544 tbl 11

FCT16244CT/162244CT/166244CT FCT16244ET/162244ET

Com'l. Mil. Com'l. Mil.

Min.

(2)

Max. Min.

(2)

Max. Min.

(2)

Max. Min.

(2)

Max. Unit

1.5 4.1 1.5 4.6 1.5 3.2 — — ns

— 0.5 — 0.5 — 0.5 — — ns

2544 tbl 12

5.2 7

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

TEST CIRCUITS AND WAVEFORMS
TEST CIRCUITS FOR ALL OUTPUTS

V

CC

7.0V

SWITCH POSITION

Test Switch

Open Drain

Pulse

Generator

500Ω

V

V

IN

OUT

D.U.T.

50pF

T

R

C L

500Ω

2544 drw 05

DEFINITIONS:

C

L= Load capacitance: includes jig and probe capacitance.
T = Termination resistance: should be equal to ZOUT of the Pulse

R

Disable Low

Enable Low

All Other Tests

Generator.

SET-UP, HOLD AND RELEASE TIMES PULSE WIDTH

DATA

INPUT

TIMING

INPUT

ASYNCHRONOUS CONTROL

PRESET

CLEAR

ETC.

SYNCHRONOUS CONTROL

PRESET

CLEAR

CLOCK ENABLE

ETC.

tSU

tSU

tH

tREM

tH

3V

1.5V
0V

3V

1.5V
0V

3V

1.5V
0V

3V

1.5V

0V

2544 drw 06

LOW-HIGH-LOW

PULSE

HIGH-LOW-HIGH

PULSE

Closed

Open

2544 lnk 13

1.5V

tW

1.5V

2544 drw 07

SAME PHASE

INPUT TRANSITION

OUTPUT

OPPOSITE PHASE

INPUT TRANSITION

tPLH

tPHL

tPLH tPHL

3V

1.5V
0V

V

OH

1.5V

VOL

3V

1.5V
0V

2544 drw 08

ENABLE AND DISABLE TIMESPROPAGATION DELAY

ENABLE DISABLE

3V

CONTROL

INPUT

t

PLZtPZL

OUTPUT

NORMALLY

LOW

SWITCH
CLOSED

3.5V

1.5V

tPZH tPHZ

OUTPUT

NORMALLY

HIGH

NOTES:

1. Diagram shown for input Control Enable-LOW and input Control
Disable-HIGH

2. Pulse Generator for All Pulses: Rate ≤ 1.0MHz; t

SWITCH
OPEN

1.5V
0V

F ≤ 2.5ns; tR ≤ 2.5ns

0.3V

0.3V

1.5V
0V

3.5V

VOL

VOH

0V

2544 drw 09

5.2 8

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

ORDERING INFORMATION

IDT XX

Temp. Range

FCT

X

Drive

X

Bus Hold

XXXX

Device Type

X

Package

X

Process

Blank
B

PV
PA
PF
E

244T
244AT
244CT
244ET

Blank
H

16
162
166

54
74

Commercial
MIL-STD-883, Class B

Shrink Small Outline Package (SO48-1)
Thin Shrink Small Outline Package (SO48-2)
Thin Very Small Outline Package (SO48-3)
CERPACK (E48-1)

Non-Inverting 16-Bit Buffer/Line Driver

Standard
Bus-hold

16-Bit High Drive
16-Bit Balanced Drive
16-Bit Light Drive

–55

°

C to +125°C

°

C to +85°C

–40

2544 drw 10

5.2 9

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