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CD74FCT541EE4 Scheda tecnica(PDF) 1 Page - Texas Instruments

Il numero della parte CD74FCT541EE4
Spiegazioni elettronici  BiCMOS OCTAL BUFFER/DRIVER WITH 3-STATE OUTPUTS
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Produttore elettronici  TI1 [Texas Instruments]
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CD74FCT541
BiCMOS OCTAL BUFFER/DRIVER
WITH 3-STATE OUTPUTS
SCBS741 – JULY 2000
1
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
D BiCMOS Technology With Low Quiescent
Power
D Buffered Inputs
D Noninverted Outputs
D Input/Output Isolation From VCC
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 CD74FCT541 is an octal buffer/driver with 3-state outputs that is ideal for driving bus lines or buffer memory
address registers and uses a small-geometry BiCMOS technology. The output stage is a combination of bipolar
and CMOS transistors that limits 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 3-state control gate is a two-input AND gate with active-low inputs, so that if either output-enable (OE1 or
OE2) input is high, all corresponding outputs are in the high-impedance state. The outputs provide noninverted
data when they are not 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 CD74FCT541 is characterized for operation from 0
°C to 70°C.
FUNCTION TABLE
(each buffer/driver)
INPUTS
OUTPUT
OE1
OE2
A
Y
L
L
L
L
L
LH
H
H
XX
Z
X
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.
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
OE1
A1
A2
A3
A4
A5
A6
A7
A8
GND
VCC
OE2
Y1
Y2
Y3
Y4
Y5
Y6
Y7
Y8
E, M, OR SM PACKAGE
(TOP VIEW)


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