background image

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

6.8

1

Integrated Device Technology, Inc.

MILITARY AND COMMERCIAL TEMPERATURE RANGES

DECEMBER 1995

©

1996 Integrated Device Technology, Inc.

6.8

DSC-2565/6

1

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 transmit-

ter/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 oppo-

site sides of the package. This pinout arrangement makes

these devices especially useful as output ports for micropro-

cessors 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 resis-

tors.  FCT2xxxT parts are plug-in replacements for FCTxxxT

parts.

FAST CMOS OCTAL

BUFFER/LINE

DRIVERS

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

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

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

IDT54/74FCT540T/AT/CT

IDT54/74FCT541/2541T/AT/CT

FEATURES:

• Common features:

Low input and output leakage 

1

µ

A (max.)

CMOS power levels

True TTL input and output compatibility

– V

OH

 = 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 I

OH

, 64mA I

OL

)

• Features for FCT2240T/FCT2244T/FCT2541T:

Std., A and C speed grades

Resistor outputs

(-15mA I

OH

, 12mA I

OL

 Com.)

(-12mA I

OH

, 12mA I

OL

 Mil.)

Reduced system switching noise

2565 drw 03

2565 drw 02

2565 drw 01

DA

0

DA

1

DA

2

DA

3

DB

0

DB

1

DB

2

DB

3

FCT240/2240T

DA

0

OB

0

DA

1

OB

1

DA

2

OB

2

DA

3

OB

3

OA

0

DB

0

OA

1

DB

1

DB

2

DB

3

OA

2

OA

3

FCT244/2244T

D

0

O

0

D

1

D

2

D

3

D

4

D

5

D

6

D

7

O

1

O

2

O

3

O

4

O

5

O

6

O

7

FCT540/541/2541T

*Logic diagram shown for 'FCT540.

'FCT541/2541T is the non-inverting option.

OE

A

OE

B

OE

A

OE

B

OE

A

OB

0

OB

1

OB

2

OB

3

OE

B

OA

0

OA

1

OA

2

OA

3

FUNCTIONAL BLOCK DIAGRAMS

background image

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

6.8

2

PIN CONFIGURATIONS

FCT240/2240T

FCT244/2244T

2565 drw 08

2565 drw 04

2565 drw 07

DA

0

DA

1

DA

2

DA

3

GND

DB

0

DB

1

DB

2

DB

3

V

CC

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

DIP/SOIC/SSOP/QSOP/CERPACK

TOP VIEW

P20-1

D20-1

SO20-2

SO20-7

SO20-8

&

E20-1

INDEX

DA

1

DA

2

DA

3

DB

0

DB

1

DA

0

OB

0

OE

A

V

CC

OE

B

OB

3

GND

DB

3

OA

3

DB

2

LCC

TOP VIEW

3

2

20 19

1

4

5

6

7

8

18

17

16

15

14

9 10 11 12 13

L20-2

OE

A

OB

0

OB

1

OB

2

OB

3

OE

B

OA

0

OA

1

OA

2

OA

3

OB

1

OB

2

OA

0

OA

1

OA

2

DA

0

OB

0

DA

1

OB

1

DA

2

OB

2

DA

3

OB

3

GND

OA

0

DB

0

OA

1

DB

1

DB

2

DB

3

OA

2

OA

3

V

CC

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

DIP/SOIC/SSOP/QSOP/CERPACK

TOP VIEW

P20-1

D20-1

SO20-2

SO20-7

SO20-8

&

E20-1

INDEX

DA

1

OB

1

DA

2

OB

2

DA

3

OA

0

DB

0

OA

1

DB

1

OA

2

DA

0

OB

0

V

CC

OE

B

*

OB

3

GND

DB

3

OA

3

DB

2

LCC

TOP VIEW

3

2

20 19

1

4

5

6

7

8

18

17

16

15

14

9 10

12 13

L20-2

11

OE

B

OE

A

OE

A

2565 drw 05

FCT540/541/2541T

 D

0

D

2

D

3

D

4

D

5

D

6

D

7

GND

O

0

*

O

1

*

O

2

*

O

3

*

O

5

*

O

7

*

O

4

*

O

6

*

V

CC

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

DIP/SOIC/QSOP/CERPACK

TOP VIEW

P20-1

D20-1

SO20-2

SO20-8

&

E20-1

INDEX

D

2

D

3

D

4

D

5

D

6

O

0

*

O

1

*

O

2

*

O

3

*

O

4

*

LCC

TOP VIEW

3

2

20 19

1

4

5

6

7

8

18

17

16

15

14

9 10 11 12 13

L20-2

D

1

D

0

V

CC

D

7

GND

O

7

*

O

6

*

O

5

*

OE

A

OE

A

OE

B

OE

B

 D

1

2565 drw 06

2565 drw 09

*

O

x for 540, Ox for 541/2541T

background image

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

6.8

3

PIN DESCRIPTION

FUNCTION TABLE

ABSOLUTE MAXIMUM RATINGS

(1)

CAPACITANCE 

(T

A

 = +25

°

C, f = 1.0MHz)

Symbol

Rating

Commercial

Military

Unit

V

TERM(2)

Terminal Voltage

with Respect to

GND

–0.5 to +7.0

–0.5 to +7.0

V

V

TERM(3)

Terminal Voltage

with Respect to

GND

–0.5 to

V

CC 

+0.5

–0.5 to

V

CC 

+0.5

V

T

A

Operating

Temperature

0 to +70

–55 to +125

°

C

T

BIAS

Temperature

Under Bias

–55 to +125

–65 to +135

°

C

T

STG

Storage

Temperature

–55 to +125

–65 to +150

°

C

P

T

Power Dissipation

0.5

0.5

W

I

OUT

DC Output

Current

–60 to +120    –60 to +120    mA

2565 lnk 03

NOTES:

1. Stresses greater than those listed under ABSOLUTE MAXIMUM RAT-

INGS 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

V

CC

 by +0.5V unless otherwise noted.

2. Input and V

CC

 terminals only.

3. Outputs and I/O terminals only.

NOTES:

  

2565 tbl 02

1. H = High Voltage Level

X = Don’t Care

L = Low Voltage Level

Z = High Impedance

Symbol

Parameter

(1)

Conditions

Typ.

Max. Unit

C

IN

Input  

Capacitance

V

IN

  = 0V

6

10

pF

C

OUT

Output  

Capacitance

V

OUT 

= 0V

8

12

pF

2565 lnk 04

NOTE:

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

Pin Names

Description

OE

A

,   

OE

B

3–State Output Enable Inputs (Active LOW)

Dxx

Inputs

Oxx

Outputs

2565 tbl 01

Inputs

(1)

Outputs

(1)

OE

OE

A

  

OE

OE

B

D

240

244  

 

540

541

L

L

L

H

L

H

L

L

L

H

L

H

L

H

H

H

X

Z

Z

Z

Z

background image

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

6.8

4

DC ELECTRICAL CHARACTERISTICS OVER OPERATING RANGE

Following Conditions Apply Unless Otherwise Specified:

Commercial: T

= 0

°

C to +70

°

C, V

CC

 = 5.0V 

±

 5%; Military: T

A

 = –55

°

C to +125

°

C, V

CC

 

= 5.0V 

±

 10%

Symbol

Parameter

Test Conditions

(1)

Min.

Typ.

(2)

Max.

Unit

V

IH

Input HIGH Level

Guaranteed Logic HIGH Level

2.0

V

V

IL

Input LOW Level

Guaranteed Logic LOW Level

0.8

V

I

I H

Input HIGH Current

(4)

V

CC

 = Max.

V

I

 = 2.7V

±

1

µ

A

I

I L

Input LOW Current

(4)

  

V

I

 = 0.5V

±

1

I

OZH

High Impedance Output Current

V

CC

 = Max.

V

= 2.7V

±

1

µ

A

I

OZL

(3-State Output pins)

(4)

V

O

 = 0.5V

±

1

I

 

Input HIGH Current

(4)

V

CC

 = Max., V

= V

CC 

(Max.)

±

1

µ

A

V

IK

Clamp Diode Voltage

V

CC

 = Min., I

IN  

= –18mA

–0.7

–1.2

V

V

H

Input Hysteresis

                                         —

200

mV

I

CC

Quiescent Power Supply Current

V

CC

 = Max., V

IN

 = GND or V

CC

0.01

1

mA

2565 lnk 05

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

Symbol

Parameter

Test Conditions

(1)

Min.

Typ.

(2)

Max.

 

Unit

V

OH

Output HIGH Voltage

V

CC

 = Min.

V

IN

 = V

IH 

or V

IL

I

OH

 = –6mA MIL.

I

OH

 = –8mA COM'L.  

2.4

3.3

V

I

OH

 = –12mA MIL.

I

OH

 = –15mA COM'L.

2.0

3.0

V

V

OL

Output LOW Voltage

V

CC

 = Min.

V

IN

 = V

IH 

or V

IL

I

OL 

= 48mA MIL.

I

OL 

= 64mA COM'L.

0.3

0.55

V

I

OS

Short Circuit Current

V

CC

 = Max., V

O

 = GND

(3)

–60

–120

–225

mA

2565 lnk 06

OUTPUT DRIVE CHARACTERISTICS FOR FCT2240/2244/2541T

2565 lnk 07

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 

±

5

µ

A at T

A

 = –55

°

C.

Symbol

Parameter

Test Conditions

(1)

Min.

Typ.

(2)

Max.

 

Unit

I

ODL

Output LOW Current

V

CC

 = 5V, V

IN 

= V

IH 

or

 

V

IL,  

V

OUT 

= 1.5V

(3)

16

48

mA

I

ODH

Output HIGH Current

V

CC

 = 5V, V

IN 

= V

IH 

or V

   IL,

V

OUT 

= 1.5V

(3)

–16

–48

mA

V

OH

Output HIGH Voltage

V

CC

 = Min.

V

IN

 = V

IH 

or 

 

V

IL

I

OH

 = –12mA MIL.

I

OH

 = –15mA COM'L.

2.4

3.3

V

V

OL

Output LOW Voltage

V

CC

 = Min.

V

IN

 = V

IH 

or V

IL

I

OL

 = 12mA

0.3

0.50

V

background image

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

6.8

5

POWER SUPPLY CHARACTERISTICS

Symbol

Parameter

Test Conditions

(1)

Min.

Typ.

(2)

Max.

Unit

I

CC

Quiescent Power Supply Current

TTL Inputs HIGH

V

CC

 = Max.

V

IN 

= 3.4V

(3)

0.5

2.0

mA

I

CCD

Dynamic Power Supply  

Current

(4)

V

CC

 = Max.

Outputs Open

OE

OE

B

 = GND  

V

IN

 = V

CC

V

IN

 = GND

FCTxxxT

0.15

0.25

mA/

MHz

One Input Toggling

50% Duty Cycle

FCT2xxxT

0.06

0.12

I

C

Total Power Supply Current

(6)

V

CC

 = Max.

V

IN

 = V

CC

FCTxxxT

1.5

3.5

mA

Outputs Open

fi = 10MHz

V

IN

 = GND FCT2xxxT

0.6

2.2

50% Duty Cycle

OE

OE

B

 = GND  

 

V

IN

 = 3.4

FCTxxxT

1.8

4.5

One Bit Toggling

V

IN

 = GND FCT2xxxT

0.9

3.2

V

CC

 = Max.

V

IN

 = V

CC

FCTxxxT

3.0

6.0

(5)

Outputs Open

fi = 2.5MHz

V

IN

 = GND FCT2xxxT

1.2

3.4

(5)

50% Duty Cycle

OE

OE

B

 = GND

V

IN

 = 3.4

FCTxxxT

5.0

14.0

(5)

Eight Bits Toggling

V

IN

 = GND FCT2xxxT

3.2

11.4

(

5)

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

CC 

= 5.0V, +25

°

C ambient.

3. Per TTL driven input  (V

IN 

= 3.4V).  All other inputs at V

CC 

or GND.

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

CC

 formula.   These limits are guaranteed but not tested.

6. I

C

 = I

QUIESCENT

 + I

INPUTS

 + I

DYNAMIC

I

C

 = I

CC

 + 

I

CC

 D

H

N

T

 + I

CCD 

 (f

CP/

2 + f

i

N

i

)

I

CC

 = Quiescent Current

I

CC

 = Power Supply Current for a TTL High Input  (V

IN

 = 3.4V)

D

H

 = Duty Cycle for TTL Inputs High

N

T

 = Number of TTL Inputs at D

H

I

CCD

 = 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 f

i

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

2565 tbl 08

background image

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

6.8

6

SWITCHING CHARACTERISTICS OVER OPERATING RANGE FOR FCT240/2240T

2565 tbl 09

2565 tbl 10

SWITCHING CHARACTERISTICS OVER OPERATING RANGE FOR FCT244/2244T

2565 tbl 11

NOTES:

1. See test circuit and waveforms.

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

2565 tbl 12

FCT240T

FCT2240T

FCT240AT

FCT2240AT

Com'l.

Mil.

Com'l.

Mil.

Symbol

Parameter

Condition

(1)

Min.(2)

Max.

Min.(2)

Max.

Min.(2)

Max.

Min.(2)

Max.

Unit

t

PLH

t

PHL

Propagation Delay

D

N

 to 

O

N

C

L

 = 50pF

R

L

 = 500

1.5

8.0

1.5

9.0

1.5

4.8

1.5

5.1

ns

t

PZH

t

PZL

Output Enable Time

1.5

10.0

1.5

10.5

1.5

6.2

1.5

6.5

ns

t

PHZ

t

PLZ

Output Disable Time

1.5

9.5

1.5

10.0

1.5

5.6

1.5

5.9

ns

FCT240CT

FCT2240CT

FCT240DT

Com'l.

Mil.

Com'l.

Mil.

Symbol

Parameter

Condition

(1)

Min.(2)

Max.

Min.(2)

Max.

Min.(2)

Max.

Min.(2)

Max.

Unit

t

PLH

t

PHL

Propagation Delay

D

N

 to 

O

N

C

L

 = 50pF

R

L

 = 500

1.5

4.3

1.5

4.7

1.5

3.6

ns

t

PZH

t

PZL

Output Enable Time

1.5

5.8

1.5

6.5

1.5

4.8

ns

t

PHZ

t

PLZ

Output Disable Time

1.5

5.2

1.5

5.7

1.5

4.0

ns

FCT244T

FCT2244T

FCT244AT

FCT2244AT

Com'l.

Mil.

Com'l.

Mil.

Symbol

Parameter

Condition

(1)

Min.(2)

Max.

Min.(2)

Max.

Min.(2)

Max.

Min.(2)

Max.

Unit

t

PLH

t

PHL

Propagation Delay

D

N

 to O

N

C

L

 = 50pF

R

L

 = 500

1.5

6.5

1.5

7.0

1.5

4.8

1.5

5.1

ns

t

PZH

t

PZL

Output Enable Time

1.5

8.0

1.5

8.5

1.5

6.2

1.5

6.5

ns

t

PHZ

t

PLZ

Output Disable Time

1.5

7.0

1.5

7.5

1.5

5.6

1.5

5.9

ns

FCT244CT

FCT2244CT

FCT244DT

Com'l.

Mil.

Com'l.

Mil.

Symbol

Parameter

Condition

(1)

Min.(2)

Max.

Min.(2)

Max.

Min.(2)

Max.

Min.(2)

Max.

Unit

t

PLH

t

PHL

Propagation Delay

D

N

 to O

N

C

L

 = 50pF

R

L

 = 500

1.5

4.1

1.5

4.6

1.5

3.6

ns

t

PZH

t

PZL

Output Enable Time

1.5

5.8

1.5

6.5

1.5

4.8

ns

t

PHZ

t

PLZ

Output Disable Time

1.5

5.2

1.5

5.7

1.5

4.0

ns

background image

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

6.8

7

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

NOTES:

1. See test circuit and waveforms.

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

2565 tbl 13

FCT540T/541T

FCT2541T

FCT540AT/541AT

FCT2541AT

FCT540CT/541CT

FCT2541CT

Com'l.

Mil.

Com'l.

Mil.

Com'l.

Mil.

Symbol

Parameter

Condition

(1)

Min.(2) Max. Min.(2) Max. Min.(2) Max. Min.(2) Max. Min.(2) Max. Min.(2) Max.

Unit

t

PLH

t

PHL

Propagation Delay

D

N

 to 

O

N

FCT540

C

L

 = 50pF

R

L

 = 500

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

t

PLH

t

PHL

Propagation Delay

D

N

 to O

N

FCT541/2541T

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

t

PZH

t

PZL

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

t

PHZ

t

PLZ

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

background image

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

6.8

8

TEST CIRCUITS AND WAVEFORMS

TEST CIRCUITS FOR ALL OUTPUTS

SWITCH POSITION

SET-UP, HOLD AND RELEASE TIMES

PULSE WIDTH

Test

Switch

Disable Low

Enable Low

Closed

All Other Tests

Open

Open Drain

DEFINITIONS:

C

L

=

Load capacitance: includes jig and probe capacitance.

R

= Termination resistance: should be equal to Z

OUT 

of the Pulse

Generator.

2565 drw 10

2565 drw 14

2565 drw 11

2565 drw 12

2565 drw 13

Pulse

Generator

R

T

D.U.T.

V

CC

V

IN

C

L

V

OUT

50pF

500

500

7.0V

3V

1.5V

0V

3V

1.5V

0V

3V

1.5V

0V

3V

1.5V

0V

DATA

INPUT

TIMING 

INPUT

ASYNCHRONOUS CONTROL

PRESET

CLEAR

ETC.

SYNCHRONOUS CONTROL

t

SU

t

H

t

REM

t

SU

t

H

HIGH-LOW-HIGH

PULSE

LOW-HIGH-LOW

PULSE

t

W

1.5V

1.5V

SAME PHASE

INPUT TRANSITION

3V

1.5V

0V

1.5V

V

OH

t

PLH

OUTPUT

OPPOSITE PHASE

INPUT TRANSITION

3V

1.5V

0V

t

PLH

t

PHL

t

PHL

V

OL

CONTROL

INPUT

3V

1.5V

0V

3.5V

0V

OUTPUT

NORMALLY

LOW

OUTPUT

NORMALLY

HIGH

SWITCH

CLOSED

SWITCH

OPEN

V

OL

0.3V

0.3V

t

PLZ

t

PZL

t

PZH

t

PHZ

3.5V

0V

1.5V

1.5V

ENABLE

DISABLE

V

OH

PRESET

CLEAR

CLOCK ENABLE

ETC.

PROPAGATION DELAY

ENABLE AND DISABLE TIMES

2565 drw 14

NOTES:

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

HIGH

2. Pulse Generator for All Pulses: Rate 

 1.0MHz; t

F

 

 2.5ns; t

R

 

 2.5ns

background image

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

6.8

9

ORDERING INFORMATION

2565 drw 15

IDT         XX      

Temp. Range

XXXX

Device Type

X

Package

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

54

74

–55

°

C to +125

°

C

0

°

C to +70

°

C

FCT

X

Family

Blank

2

High Drive

Balanced Drive