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

≤1µA (max.)

–

CMOS power levels

–

True TTL input and output compatibility

– VOH = 3.3V (typ.)

– VOL = 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

2565 drw 03

2565 drw 02

2565 drw 01

DA0

DA1

DA2

DA3

DB0

DB1

DB2

DB3

FCT240/2240T

DA0

OB0

DA1

OB1

DA2

OB2

DA3

OB3

OA0

DB0

OA1

DB1

DB2

DB3

OA2

OA3

FCT244/2244T

D0

O0

D1

D2

D3

D4

D5

D6

D7

O1

O2

O3

O4

O5

O6

O7

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

OB3

OE B

OA 0

OA 1

OA 2

OA 3

FUNCTIONAL BLOCK DIAGRAMS