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CD74FCT240M Fiches technique(PDF) 1 Page - Texas Instruments

No de pièce CD74FCT240M
Description  BiCMOS OCTAL BUFFER/LINE DRIVER WITH 3-STATE OUTPUTS
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Fabricant  TI1 [Texas Instruments]
Site Internet  http://www.ti.com
Logo TI1 - Texas Instruments

CD74FCT240M Fiches technique(HTML) 1 Page - 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
L
LH
H
X
Z
Copyright
© 2000, Texas Instruments Incorporated
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)


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