CD74FCT240 datasheet(1/12 Pages) TI1

Teilenummer	CD74FCT240

Bauteilbeschribung	BiCMOS OCTAL BUFFER/LINE DRIVER WITH 3-STATE OUTPUTS

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Hersteller	TI1 [Texas Instruments]

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CD74FCT240

BiCMOS OCTAL BUFFER/LINE DRIVER

WITH 3-STATE OUTPUTS

SCBS729 − JULY 2000

1

POST OFFICE BOX 655303

• DALLAS, TEXAS 75265

D BiCMOS Technology With Low Quiescent

Power

D Buffered Inputs

D Inverted Outputs

D Input/Output Isolation From V

CC

D Controlled Output Edge Rates

D 64-mA Output Sink Current

D Output Voltage Swing Limited to 3.7 V

D SCR Latch-Up-Resistant BiCMOS Process

and Circuit Design

D Package Options Include Plastic

Small-Outline (M) and Shrink Small-Outline

(SM) Packages and Standard Plastic (E) DIP

description

The CD74FCT240 is an octal buffer/line driver with 3-state outputs, using a small-geometry BiCMOS

technology. The output stages are a combination of bipolar and CMOS transistors that limit the output high level

to two diode drops below VCC. This resultant lowering of output swing (0 V to 3.7 V) reduces power-bus ringing

[a source of electromagnetic interference (EMI)] and minimizes VCC bounce and ground bounce and their

effects during simultaneous output switching. The output configuration also enhances switching speed and is

capable of sinking 64 mA.

The CD74FCT240 is organized as two 4-bit buffers/line drivers with separate active-low output-enable (OE)

inputs. When OE is low, the device passes data from the A inputs to the Y outputs. When OE is high, the outputs

are in the high-impedance state.

To ensure the high-impedance state during power up or power down, OE should be tied to VCC through a pullup

resistor; the minimum value of the resistor is determined by the current-sinking capability of the driver.

The CD74FCT240 is characterized for operation from 0

°C to 70°C.

FUNCTION TABLE

(each buffer/driver)

INPUTS

OUTPUT

OE

A

OUTPUT

Y

L

H

L

LH

H

X

Z

Copyright

PRODUCTION DATA information is current as of publication date.

Products conform to specifications per the terms of Texas Instruments

standard warranty. Production processing does not necessarily include

testing of all parameters.

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of

Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

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1OE

1A1

2Y4

1A2

2Y3

1A3

2Y2

1A4

2Y1

GND

VCC

2OE

1Y1

2A4

1Y2

2A3

1Y3

2A2

1Y4

2A1

E, M, OR SM PACKAGE

(TOP VIEW)

Ähnliche Beschreibung - CD74FCT240

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