Datasheet IDT54FCT240AT, IDT54FCT240CT, IDT54FCT240DT, IDT74FCT240T, IDT74FCT240AT Datasheet (IDT)

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IDT54/74FCT240/244T/AT/CT/DT - 2240/2244T/AT/CT, IDT54/74FCT540/541/2541T/AT/CT
FAST CMOS OCTAL BUFFER/LINE DRIVER MILITARY AND COMMERCIAL TEMPERATURE RANGES

FAST CMOS OCTAL

IDT54/74FCT240T/AT/CT/DT - 2240T/AT/CT
IDT54/74FCT244T/AT/CT/DT - 2244T/AT/CT

BUFFER/LINE
DRIVERS

Integrated Device Technology, Inc.

IDT54/74FCT540T/AT/CT

IDT54/74FCT541/2541T/AT/CT

FEATURES:

• Common features:

– Low input and output leakage ≤1µA (max.)
– CMOS power levels
– True TTL input and output compatibility

– VOH = 3.3V (typ.)
– V

OL = 0.3V (typ.)

– Meets or exceeds JEDEC standard 18 specifications
– Product available in Radiation Tolerant and Radiation

Enhanced versions

– Military product compliant to MIL-STD-883, Class B

and DESC listed (dual marked)

– Available in DIP, SOIC, SSOP, QSOP, CERPACK

and LCC packages

• Features for FCT240T/FCT244T/FCT540T/FCT541T:

– Std., A, C and D speed grades
– High drive outputs (-15mA IOH, 64mA IOL)

• Features for FCT2240T/FCT2244T/FCT2541T:

– Std., A and C speed grades
– Resistor outputs (-15mA IOH, 12mA IOL Com.)

(-12mA IOH, 12mA IOL Mil.)

– Reduced system switching noise

DESCRIPTION:

The IDT octal buffer/line drivers are built using an advanced
dual metal CMOS technology. The FCT240T/FCT2240T and
FCT244T/FCT2244T are designed to be employed as memory
and address drivers, clock drivers and bus-oriented transmit­ter/receivers which provide improved board density.

The FCT540T and FCT541T/FCT2541T are similar in
function to the FCT240T/FCT2240T and FCT244T/FCT2244T,
respectively, except that the inputs and outputs are on oppo­site sides of the package. This pinout arrangement makes
these devices especially useful as output ports for micropro­cessors and as backplane drivers, allowing ease of layout and
greater board density.

The FCT2240T, FCT2244T and FCT2541T have balanced
output drive with current limiting resistors. This offers low
ground bounce, minimal undershoot and controlled output fall
times-reducing the need for external series terminating resis­tors. FCT2xxxT parts are plug-in replacements for FCTxxxT
parts.

FUNCTIONAL BLOCK DIAGRAMS

OE

A

OE

B

DA0

OB

DA1

OB

DA2

OB

DA3

OB3

0

1

2

FCT240/2240T

OA

0

DB0

OA

1

DB1

OA

2

DB2

OA

3

DB3

2565 drw 01

OE

DA0
OB0
DA1
OB1
DA2

OB2
DA3

OB3

OE

OE

A

OE

B

OA0
DB0
OA1

DB1
OA2

DB2
OA3

DB3

FCT244/2244T

2565 drw 02

A

D0 O0
D1

D2
D3
D4
D5
D6
D7

FCT540/541/2541T

*Logic diagram shown for 'FCT540.
'FCT541/2541T is the non-inverting option.

2565 drw 03

B

O1
O2
O3
O4
O5
O6
O7

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

MILITARY AND COMMERCIAL TEMPERATURE RANGES DECEMBER 1995

1996 Integrated Device Technology, Inc. 6.8 DSC-2565/6

6.8 1

1

IDT54/74FCT240/244T/AT/CT/DT - 2240/2244T/AT/CT, IDT54/74FCT540/541/2541T/AT/CT
FAST CMOS OCTAL BUFFER/LINE DRIVER MILITARY AND COMMERCIAL TEMPERATURE RANGES

PIN CONFIGURATIONS

FCT240/2240T

FCT244/2244T

OEA

DA0
OB0
DA1
OB1
DA2
OB2

DA3

OB3

GND

20

2
3

4
5
6
7
8
9

P20-1

D20-1
SO20-2
SO20-7
SO20-8

E20-1

19
18
17
16
15
14
13

&

12

10 11

VCC1

OEB

OA0
DB
OA1
DB1
OA2

DB2

OA3
DB3

DIP/SOIC/SSOP/QSOP/CERPACK

TOP VIEW

OE

DA
OB

DA
OB
DA
OB
DA
OB

GND

1

A

2

0

3

0
1

1
2
2
3
3

4
5
6
7
8

9

P20-1

D20-1
SO20-2
SO20-7
SO20-8

E20-1

10

20
19
18
17
16
15
14

&

13
12
11

V
OE

OA
DB
OA
DB

OA
DB
OA
DB

CC

DIP/SOIC/SSOP/QSOP/CERPACK

TOP VIEW

0

B

0
0
1
1

2
2
3
3

2565 drw 04

2565 drw 05

INDEX

INDEX

DA
OB
DA
OB
DA

DA1
OB1

DA2
OB2

DA3

1
1
2
2
3

OB0

DA0

OEA

3 2 20 19

4

1

5
6

L20-2

7
8

9 10111213

3

OB3

DB

GND

LCC

TOP VIEW

0

OB

0

DA

A

OE

CC

V

3 2 20 19

4

1

5
6

L20-2
7
8

11

910 1213

3

3

OB

DB

GND

LCC

TOP VIEW

VCC

OA3

3

OA

18
17
16
15
14

DB2

*

B

OE

18
17
16
15
14

2

DB

OEB

OA0
DB0

OA1

DB1

OA2

2565 drw 07

OA

0

DB

0

OA

1

DB

1

OA

2

2565 drw 08

FCT540/541/2541T

OEA

D0

D1

D2
D3

D4
D5
D6
D7

GND

2
3
4

5
6
7
8
9
10

P20-1

D20-1
SO20-2
SO20-8

E20-1

20
19
18
17

16
15
14

&

13
12
11

DIP/SOIC/QSOP/CERPACK

TOP VIEW

*Ox for 540, Ox for 541/2541T

V

CC1

OEB

0*

O

1*

O

2*

O

3*

O

4*

O
O

5*
6*

O
O

7*

INDEX

D2
D3
D4
D5
D6

D1

OEA

D0

3 2 20 19

4

1

5
6

L20-2
7
8

9 10111213

7*O6*O5*

D7

O

GND

VCC

OEB

18
17
16
15
14

O0*
O
O
O
O

1*
2*
3*
4*

LCC

TOP VIEW

2565 drw 06 2565 drw 09

6.8 2

IDT54/74FCT240/244T/AT/CT/DT - 2240/2244T/AT/CT, IDT54/74FCT540/541/2541T/AT/CT
FAST CMOS OCTAL BUFFER/LINE DRIVER MILITARY AND COMMERCIAL TEMPERATURE RANGES

PIN DESCRIPTION FUNCTION TABLE

Pin Names Description

OE

A, OEB 3–State Output Enable Inputs (Active LOW)

Dxx Inputs
Oxx Outputs

2565 tbl 01

(1)

OE

OE

A

Inputs

OE

B D 240 244 540 541

OE

Outputs

LLLHLHL
LLHLHLH

H H X ZZZZ

NOTES:

1. H = High Voltage Level
X = Don’t Care
L = Low Voltage Level
Z = High Impedance

(1)

2565 tbl 02

ABSOLUTE MAXIMUM RATINGS

(1)

Symbol Rating Commercial Military Unit

(2)

VTERM

Terminal Voltage

–0.5 to +7.0 –0.5 to +7.0 V
with Respect to
GND

(3)

VTERM

TA Operating

Terminal Voltage
with Respect to
GND

–0.5 to

V

CC +0.5

–0.5 to

VCC +0.5

0 to +70 –55 to +125 °C

V

Temperature

TBIAS Temperature

–55 to +125 –65 to +135 °C
Under Bias

TSTG Storage

–55 to +125 –65 to +150 °C
Temperature

PT Power Dissipation 0.5 0.5 W
IOUT DC Output

–60 to +120 –60 to +120 mA
Current

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. No terminal voltage may exceed

CC by +0.5V unless otherwise noted.

V

2. Input and V

3. Outputs and I/O terminals only.

CC terminals only.

2565 lnk 03

CAPACITANCE (TA = +25°C, f = 1.0MHz)

Symbol Parameter

CIN Input

Capacitance

COUT Output

Capacitance

NOTE:

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

(1)

Conditions Typ. Max. Unit

VIN = 0V 6 10 pF

VOUT = 0V 8 12 pF

2565 lnk 04

6.8 3

IDT54/74FCT240/244T/AT/CT/DT - 2240/2244T/AT/CT, IDT54/74FCT540/541/2541T/AT/CT
FAST CMOS OCTAL BUFFER/LINE DRIVER MILITARY AND COMMERCIAL TEMPERATURE RANGES

DC ELECTRICAL CHARACTERISTICS OVER OPERATING RANGE

Following Conditions Apply Unless Otherwise Specified:
Commercial: TA = 0°C to +70°C, VCC = 5.0V ± 5%; 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
II L Input LOW Current

(4)

(4)

VI = 0.5V — — ±1

VCC = Max. VI = 2.7V — — ±1 µA

IOZH High Impedance Output Current VCC = Max. VO = 2.7V — — ±1 µA

(4)

(4)

VO = 0.5V — — ±1

VCC = Max., VI = VCC (Max.) — — ±1 µA

IOZL (3-State Output pins)
II Input HIGH Current
VIK Clamp Diode Voltage VCC = Min., IIN = –18mA — –0.7 –1.2 V
VH Input Hysteresis — — 200 — mV
ICC Quiescent Power Supply Current VCC = Max., VIN = GND or VCC — 0.01 1 mA

(2)

Max. Unit

2565 lnk 05

OUTPUT DRIVE CHARACTERISTICS FOR FCT240/244/540/541T

Symbol Parameter Test Conditions

VOH Output HIGH Voltage VCC = Min.

IN = VIH or VIL

V

IOH = –6mA MIL.

OH = –8mA COM'L.

I
IOH = –12mA MIL.

OH = –15mA COM'L.

I

VOL Output LOW Voltage VCC = Min.

IN = VIH or VIL

V

IOS Short Circuit Current VCC = Max., VO = GND

IOL = 48mA MIL.

OL = 64mA COM'L.

I

(3)

(1)

Min. Typ.

2.4 3.3 — V

2.0 3.0 — V

— 0.3 0.55 V

–60 –120 –225 mA

(2)

Max. Unit

2565 lnk 06

OUTPUT DRIVE CHARACTERISTICS FOR FCT2240/2244/2541T

Symbol Parameter Test Conditions

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

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 shorted at one time. Duration of the short circuit test should not exceed one second.

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

A = –55°C.

(1)

(3)

VOUT = 1.5V

(3)

IOH = –12mA MIL.
I

OH = –15mA COM'L.

Min. Typ.

16 48 — mA

–16 –48 — mA

2.4 3.3 — V

IOL = 12mA — 0.3 0.50 V

(2)

Max. Unit

2565 lnk 07

6.8 4

IDT54/74FCT240/244T/AT/CT/DT - 2240/2244T/AT/CT, IDT54/74FCT540/541/2541T/AT/CT
FAST CMOS OCTAL BUFFER/LINE DRIVER MILITARY AND COMMERCIAL TEMPERATURE RANGES

POWER SUPPLY CHARACTERISTICS

Symbol Parameter Test Conditions

∆ICC Quiescent Power Supply Current

TTL Inputs HIGH

ICCD Dynamic Power Supply

(4)

Current

VCC = Max.

IN = 3.4V

V

(3)

VCC = Max.
Outputs Open

OE

A = OEB = GND

One Input Toggling

(1)

VIN = VCC
VIN = GND

Min. Typ.

— 0.5 2.0 mA

FCTxxxT — 0.15 0.25 mA/

FCT2xxxT — 0.06 0.12

50% Duty Cycle

IC Total Power Supply Current

(6)

VCC = Max. VIN = VCC FCTxxxT — 1.5 3.5 mA
Outputs Open

VIN = GND FCT2xxxT — 0.6 2.2
fi = 10MHz
50% Duty Cycle

OE

A = OEB = GND

V

IN = 3.4 FCTxxxT — 1.8 4.5

One Bit Toggling VIN = GND FCT2xxxT 0.9 3.2
VCC = Max. VIN = VCC FCTxxxT — 3.0 6.0
Outputs Open

VIN = GND FCT2xxxT — 1.2 3.4
fi = 2.5MHz
50% Duty Cycle

OE

A = OEB = GND

VIN = 3.4 FCTxxxT — 5.0 14.0

Eight Bits Toggling VIN = GND FCT2xxxT — 3.2 11.4

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

6. I

C = IQUIESCENT + IINPUTS + IDYNAMIC

IC = ICC + ∆ICC DHNT + ICCD (fCP/2 + fiNi)
I

CC = Quiescent Current

∆I

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

D

H = Duty Cycle for TTL Inputs High

N

T = Number of TTL Inputs at DH

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

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

f

i = Input Frequency

N

i = Number of Inputs at fi

All currents are in milliamps and all frequencies are in megahertz.

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

MHz

(5)
(5)

(5)

(5)

2565 tbl 08

6.8 5

IDT54/74FCT240/244T/AT/CT/DT - 2240/2244T/AT/CT, IDT54/74FCT540/541/2541T/AT/CT
FAST CMOS OCTAL BUFFER/LINE DRIVER MILITARY AND COMMERCIAL TEMPERATURE RANGES

SWITCHING CHARACTERISTICS OVER OPERATING RANGE FOR FCT240/2240T

Symbol Parameter Condition

tPLH
tPHL
tPZH

Propagation Delay
D

N to ON

CL = 50pF

R

L = 500Ω

Output Enable Time 1.5 10.0 1.5 10.5 1.5 6.2 1.5 6.5 ns
tPZL
tPHZ

Output Disable Time 1.5 9.5 1.5 10.0 1.5 5.6 1.5 5.9 ns
tPLZ

Symbol Parameter Condition

t
t
t
t
t
t

PLH
PHL
PZH
PZL
PHZ
PLZ

Propagation Delay

N

to

O

D

N

CL = 50pF

L

= 500

R

Output Enable Time 1.5 5.8 1.5 6.5 1.5 4.8 — — ns

Output Disable Time 1.5 5.2 1.5 5.7 1.5 4.0 — — ns

(1)

(1)

Ω

FCT240T

FCT2240T

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

Min.

(2)

Max. Min.

(2)

Max. Min.

1.5 8.0 1.5 9.0 1.5 4.8 1.5 5.1 ns

FCT240CT

FCT2240CT FCT240DT

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

Min.

(2)

Max. Min.

(2)

Max. Min.

1.5 4.3 1.5 4.7 1.5 3.6 — — ns

(2)

(2)

FCT240AT

FCT2240AT

Max. Min.

Max. Min.

(2)

(2)

Max.

Max.

Unit

2565 tbl 09

Unit

2565 tbl 10

SWITCHING CHARACTERISTICS OVER OPERATING RANGE FOR FCT244/2244T

Symbol Parameter Condition

tPLH
tPHL
tPZH

Propagation Delay

D

N to ON

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

Symbol Parameter Condition

tPLH
tPHL
tPZH

Propagation Delay

D

N to ON

CL = 50pF

R

Output Enable Time 1.5 5.8 1.5 6.5 1.5 4.8 — — ns

(1)

L = 500Ω

tPZL
tPHZ

Output Disable Time 1.5 5.2 1.5 5.7 1.5 4.0 — — ns
tPLZ

NOTES:

1. See test circuit and waveforms.

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

FCT244T

FCT2244T

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

Min.

(2)

Max. Min.

(2)

Max. Min.

1.5 6.5 1.5 7.0 1.5 4.8 1.5 5.1 ns

FCT244CT

FCT2244CT FCT244DT

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

Min.

(2)

Max. Min.

(2)

Max. Min.

1.5 4.1 1.5 4.6 1.5 3.6 — — ns

(2)

(2)

FCT244AT

FCT2244AT

Max. Min.

Max. Min.

(2)

(2)

Max.

Max.

Unit

2565 tbl 11

Unit

2565 tbl 12

6.8 6

IDT54/74FCT240/244T/AT/CT/DT - 2240/2244T/AT/CT, IDT54/74FCT540/541/2541T/AT/CT
FAST CMOS OCTAL BUFFER/LINE DRIVER MILITARY AND COMMERCIAL TEMPERATURE RANGES

SWITCHING CHARACTERISTICS OVER OPERATING RANGE FOR FCT540/541/2541T

FCT540T/541T

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

Symbol Parameter Condition

tPLH
tPHL

Propagation Delay

D

N to ON

L = 50pF

C

R

L = 500Ω

(1)

(2)

Min.

1.5 8.5 1.5 9.5 1.5 4.8 1.5 5.1 1.5 4.3 1.5 4.7 ns

FCT540
tPLH
tPHL

Propagation Delay

D

N to ON

1.5 8.0 1.5 9.0 1.5 4.8 1.5 5.1 1.5 4.1 1.5 4.6 ns

FCT541/2541T
tPZH

Output Enable Time 1.5 10.0 1.5 10.5 1.5 6.2 1.5 6.5 1.5 5.8 1.5 6.5 ns
tPZL
tPHZ

Output Disable Time 1.5 9.5 1.5 10.0 1.5 5.6 1.5 5.9 1.5 5.2 1.5 5.7 ns
tPLZ

NOTES:

1. See test circuit and waveforms.

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

FCT2541T

Max. Min.

(2)

Max. Min.

FCT540AT/541AT

FCT2541AT

(2)

Max. Min.

(2)

Max. Min.

FCT540CT/541CT

FCT2541CT

(2)

Max. Min.

(2)

Max.

Unit

2565 tbl 13

6.8 7

IDT54/74FCT240/244T/AT/CT/DT - 2240/2244T/AT/CT, IDT54/74FCT540/541/2541T/AT/CT
FAST CMOS OCTAL BUFFER/LINE DRIVER MILITARY AND COMMERCIAL TEMPERATURE RANGES

TEST CIRCUITS AND WAVEFORMS
TEST CIRCUITS FOR ALL OUTPUTS

V

CC

V

OUT

Pulse

Generator

V

IN

D.U.T.

50pF

T

R

C L

SET-UP, HOLD AND RELEASE TIMES

DATA

INPUT

TIMING

INPUT

ASYNCHRONOUS CONTROL

PRESET

CLEAR

ETC.

SYNCHRONOUS CONTROL

PRESET

CLEAR

CLOCK ENABLE

ETC.

tSU

tSU

tH

tREM

tH

500Ω

500Ω

7.0V

2565 drw 10

3V

1.5V
0V

3V

1.5V
0V

3V

1.5V

0V

3V

1.5V
0V

2565 drw 11

SWITCH POSITION

Test Switch

Open Drain
Disable Low

Closed

Enable Low

All Other Tests

DEFINITIONS:

L= Load capacitance: includes jig and probe capacitance.

C

T = Termination resistance: should be equal to ZOUT of the Pulse

R

Generator.

Open

PULSE WIDTH

LOW-HIGH-LOW

HIGH-LOW-HIGH

PULSE

tW

PULSE

2565 drw 14

1.5V

1.5V

2565 drw 12

PROPAGATION DELAY

SAME PHASE

INPUT TRANSITION

tPLH

OUTPUT

tPLH tPHL

OPPOSITE PHASE

INPUT TRANSITION

tPHL

3V

1.5V
0V

V

OH

1.5V

VOL

3V

1.5V
0V

2565 drw 13

ENABLE AND DISABLE TIMES

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 Disable­HIGH

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

2565 drw 14

6.8 8

IDT54/74FCT240/244T/AT/CT/DT - 2240/2244T/AT/CT, IDT54/74FCT540/541/2541T/AT/CT
FAST CMOS OCTAL BUFFER/LINE DRIVER MILITARY AND COMMERCIAL TEMPERATURE RANGES

ORDERING INFORMATION

IDT XX

Temp. Range

FCT

X

Family

XXXX

Device TypeXPackage

X

Process

Blank
B

P
D
SO
L
E
PY
Q

240T
244T
540T
541T
240AT
244AT
540AT
541AT
240CT
244CT
540CT
541CT
240DT
244DT

Commercial
MIL-STD-883, Class B

Plastic DIP
CERDIP
Small Outline IC
Leadless Chip Carrier
CERPACK
Shrink Small Outline Package
Quarter-size Small Outline Package

Inverting Octal Buffer/Line Driver
Non-Inverting Octal Buffer/Line Driver
Non-Inverting Octal Buffer/Line Driver
Inverting Octal Buffer/Line Driver
Non-Inverting Octal Buffer/Line Driver

Blank2High Drive

Balanced Drive

54
74

–55°C to +125°C
0°C to +70°C

2565 drw 15

6.8 9