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Texas Instruments (TI) Electronic Components Datasheet

SN54BCT544 Datasheet

Octal Registered Transceivers

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State-of-the-Art BiCMOS Design
Significantly Reduces ICCZ
ESD Protection Exceeds 2000 V
Per MIL-STD-883C, Method 3015
Power-Up High-Impedance State
3-State Inverting Outputs
Back-to-Back Registers for Storage
Package Options Include Plastic
Small-Outline (DW) Packages, Ceramic
Chip Carriers (FK) and Flatpacks (W), and
Plastic and Ceramic 300-mil DIPs (JT, NT)
description
The BCT544 octal registered 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-to-B enable (CEAB) input must be low in
order to enter data from A or to output data from
B. If CEAB is low and LEAB is low, the A-to-B
latches are 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 inverted 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 SN54BCT544 is characterized for operation
over the full military temperature range of – 55°C
to 125°C. The SN74BCT544 is characterized for
operation from 0°C to 70°C.
SN54BCT544, SN74BCT544
OCTAL REGISTERED TRANSCEIVERS
WITH 3-STATE OUTPUTS
SCBS039B – NOVEMBER 1988 – REVISED NOVEMBER 1993
SN54BCT544 . . . JT OR W PACKAGE
SN74BCT544 . . . DW OR NT PACKAGE
(TOP VIEW)
LEBA
OEBA
A1
A2
A3
A4
A5
A6
A7
A8
CEAB
GND
1
2
3
4
5
6
7
8
9
10
11
12
24 VCC
23 CEBA
22 B1
21 B2
20 B3
19 B4
18 B5
17 B6
16 B7
15 B8
14 LEAB
13 OEAB
SN54BCT544 . . . FK PACKAGE
(TOP VIEW)
4 3 2 1 28 27 26
A2 5
25 B2
A3 6
24 B3
A4 7
23 B4
NC 8
22 NC
A5 9
21 B5
A6 10
20 B6
A7 11
19 B7
12 13 14 15 16 17 18
NC – No internal connection
FUNCTION TABLE†
CEAB
INPUTS
LEAB OEAB
A
OUTPUT
B
H X XX
Z
L X HX
L H LX
L L LL
Z
B0‡
H
L L LH
L
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.
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.
POST OFFICE BOX 655303 DALLAS, TEXAS 75265
Copyright © 1993, Texas Instruments Incorporated
1


Texas Instruments (TI) Electronic Components Datasheet

SN54BCT544 Datasheet

Octal Registered Transceivers

No Preview Available !

SN54BCT544, SN74BCT544
OCTAL REGISTERED TRANSCEIVERS
WITH 3-STATE OUTPUTS
SCBS039B – NOVEMBER 1988 – REVISED NOVEMBER 1993
logic symbol
OEBA
CEBA
LEBA
OEAB
CEAB
LEAB
A1
2
23
1
13
11
14
3
4
A2
5
A3
6
A4
7
A5
8
A6
9
A7
10
A8
1EN3
G1
1C5
2EN4
G2
2C6
3
6D
5D
4
This symbol is in accordance with ANSI/IEEE Std 91-1984 and IEC Publication 617-12.
22
B1
21
B2
20
B3
19
B4
18
B5
17
B6
16
B7
15
B8
logic diagram (positive logic)
OEBA 2
23
CEBA
1
LEBA
OEAB 13
CEAB 11
LEAB 14
A1 3
C1
1D
C1
1D
22
B1
Pin numbers shown are for the DW, JT, NT, and W packages.
To Seven Other Channels
2 POST OFFICE BOX 655303 DALLAS, TEXAS 75265


Part Number SN54BCT544
Description Octal Registered Transceivers
Maker Texas
Total Page 13 Pages
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