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SN74F543 Scheda tecnica(PDF) 1 Page - Texas Instruments

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Il numero della parte SN74F543
Spiegazioni elettronici  OCTAL REGISTERED TRANSCEIVER WITH 3-STATE OUTPUTS
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Produttore elettronici  TI1 [Texas Instruments]
Homepage  http://www.ti.com
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SN74F543 Scheda tecnica(HTML) 1 Page - Texas Instruments

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SN74F543
OCTAL REGISTERED TRANSCEIVER
WITH 3-STATE OUTPUTS
SDFS025B – D2942, MARCH 1987 – REVISED OCTOBER 1993
Copyright
© 1993, Texas Instruments Incorporated
2–1
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
3-State True Outputs
Back-to-Back Registers for Storage
Package Options Include Plastic
Small-Outline and Shrink Small-Outline
Packages and Standard Plastic 300-mil
DIPs
description
The SN74F543 octal transceiver contains two
sets of D-type latches for temporary storage of
data
flowing
in
either
direction.
Separate
latch-enable (LEAB or LEBA) and output enable
(OEAB or OEBA) inputs are provided for each
register to permit independent control in either
direction of data flow. The A outputs are
characterized to sink 24 mA while the B outputs
are characterized to sink 64 mA.
The A-to-B enable (CEAB) input must be low in order to enter data from A or to output data from B. Having CEAB
low and LEAB low makes the A-to-B latches transparent; a subsequent low-to-high transition of LEAB puts the
A latches in the storage mode. With CEAB and OEAB both low, the 3-state B outputs are active and reflect the
data present at the output of the A latches. Data flow from B to A is similar, but requires using the CEBA, LEBA,
and OEBA inputs.
The SN74F543 is available in TI’s shrink small-outline package (DB), which provides the same I/O pin count
and functionality of standard small-outline packages in less than half the printed-circuit-board area.
The SN74F543 is characterized for operation from 0
°C to 70°C.
FUNCTION TABLE†
INPUTS
OUTPUT
CEAB
LEAB
OEAB
A
B
H
X
X
X
Z
X
XH
X
Z
L
HL
X
B0‡
L
LL
L
L
L
L
L
H
H
† A-to-B data flow is shown; B-to-A flow control is the
same except that it uses CEBA, LEBA, and OEBA.
‡ Output level before the indicated steady-state input
conditions were established.
DB, DW, OR NT PACKAGE
(TOP VIEW)
1
2
3
4
5
6
7
8
9
10
11
12
24
23
22
21
20
19
18
17
16
15
14
13
LEBA
OEBA
A1
A2
A3
A4
A5
A6
A7
A8
CEAB
GND
VCC
CEBA
B1
B2
B3
B4
B5
B6
B7
B8
LEAB
OEAB
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.


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