Texas Instruments SN74BCT543DW, SN74BCT543DWR, SN74BCT543NT, SNJ54BCT543FK, SNJ54BCT543JT Datasheet

SN54BCT543, SN74BCT543

OCTAL REGISTERED TRANSCEIVERS

WITH 3-STATE OUTPUTS

SCBS026C – NOVEMBER 1988 – REVISED APRIL 1994

• State-of-the-Art BiCMOS Design

Significantly Reduces I

CCZ

• 3-State True Outputs

• Back-to-Back Registers for Storage

• ESD Protection Exceeds 2000 V

Per MIL-STD-883C, Method 3015

• Package Options Include Plastic

Small-Outline Packages (DW), Ceramic
Chip Carriers (FK) and Flatpacks (W), and
Plastic and Ceramic 300-mil DIPs (JT, NT)

description

The ′BCT543 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-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
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
and OEBA inputs.

The SN54BCT543 is characterized for operation
over the full military temperature range of –55°C
to 125°C. The SN74BCT543 is characterized for
operation from 0°C to 70°C.

puts the A latches in the storage

CEAB LEAB OEAB A

H X X X Z
X XHX Z

L HLX B
L LLL 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

‡

Output level before the indicated steady-state input
conditions were established.

, LEBA,

FUNCTION TABLE

INPUTS

SN54BCT543 . . . JT OR W PACKAGE

SN74BCT543 . . . DW OR NT PACKAGE

LEBA

OEBA

CEAB

GND

SN54BCT543 . . . FK PACKAGE

A2
A3
A4

NC

A5

10

A6
A7

NC – No internal connection

†

OUTPUT

B

‡

0

, LEBA, and OEBA.

(TOP VIEW)

NC

24
23
22
21
20
19
18
17
16
15
14
13

CC

V

OEAB

V

CC

CEBA
B1
B2
B3
B4
B5
B6
B7
B8
LEAB
OEAB

B1

25
24
23
22
21
20
19

B8

LEAB

B2
B3
B4
NC
B5
B6
B7

1
2
3

A1

4

A2

5

A3

6

A4

7

A5

8

A6

9

A7

10

A8

11
12

(TOP VIEW)

A1

OEBA

LEBANCCEBA

3212827

426

5
6
7
8
9

11

12 13

14 15 16 1718

A8

GND

CEAB

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  1994, Texas Instruments Incorporated

2–1

SN54BCT543, SN74BCT543
OCTAL REGISTERED TRANSCEIVERS
WITH 3-STATE OUTPUTS

SCBS026C – NOVEMBER 1988 – REVISED APRIL 1994

logic symbol

†

This symbol is in accordance with ANSI/IEEE Std 91-1984 and IEC Publication 617-12.

†

OEBA
CEBA

LEBA
OEAB
CEAB

LEAB

A1

A2
A3
A4

A5
A6

A7
A8

2
23
1
13
11
14

3

4
5
6

7
8

9
10

1EN3
G1
1C5
2EN4
G2
2C6

3

6D

5D

1
1

4

22

21
20

19
18

17
16
15

B1

B2
B3

B4
B5

B6
B7
B8

logic diagram (positive logic)

A1

2

23

1

13

11

14

3

OEBA

CEBA

LEBA

OEAB

CEAB

LEAB

C1
1D

C1
1D

22

B1

Pin numbers shown are for the DW, JT, NT, and W packages.

2–2

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

To Seven Other Channels

SN54BCT543, SN74BCT543

UNIT

OCTAL REGISTERED TRANSCEIVERS

WITH 3-STATE OUTPUTS

SCBS026C – NOVEMBER 1988 – REVISED APRIL 1994

absolute maximum ratings over operating free-air temperature range (unless otherwise noted)

Supply voltage range, V

CC

Input voltage range: Control inputs (see Note 1) – 0.5 V to 7 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

I/O ports (see Note 1) – 0.5 V to 5.5 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Voltage range applied to any output in the disabled or power-off state, V
Voltage range applied to any output in the high state, V
Input clamp current, I

–30 mA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

IK

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

O

O

Current into any output in the low state: SN54BCT543 96 mA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

SN74BCT543 128 mA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Operating free-air temperature range: SN54BCT543 – 55°C to 125°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

SN74BCT543 0°C to 70°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Storage temperature range – 65°C to 150°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

†

Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only, and
functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not
implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.

NOTE 1: The input and output voltage ratings may be exceeded if the input and output current ratings are observed.

– 0.5 V to 7 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

– 0.5 V to 7 V. . . . . . . . . . . . . . . . .

– 0.5 V to V

recommended operating conditions

SN54BCT543 SN74BCT543

MIN NOM MAX MIN NOM MAX

V
V
V
I
I
I
T

CC
IH

IL
IK
OH
OL

A

Supply voltage 4.5 5 5.5 4.5 5 5.5 V
High-level input voltage 2 2 V
Low-level input voltage 0.8 0.8 V
Input clamp current –18 –18 mA
High-level output current –12 –15 mA
Low-level output current 48 64 mA
Operating free-air temperature –55 125 0 70 °C

†

CC

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

2–3

SN54BCT543, SN74BCT543

PARAMETER

TEST CONDITIONS

UNIT

VOLV

V

V

I

‡

V

5.5 V

V

2.7 V

A

I

‡

V

5.5 V

V

0.5 V

mA

OCTAL REGISTERED TRANSCEIVERS
WITH 3-STATE OUTPUTS

SCBS026C – NOVEMBER 1988 – REVISED APRIL 1994

electrical characteristics over recommended operating free-air temperature range (unless
otherwise noted)

SN54BCT543 SN74BCT543

MIN TYP†MAX MIN TYP†MAX

V

IK

V

OH

I

I

IH

IL

I

OS

I

CCL

I

CCH

I

CCZ

C

i

C

io

†

All typical values are at VCC = 5 V, TA = 25°C.

‡

For I/O ports, the parameters IIH and IIL include the off-state output current.

§

Not more than one output should be tested at a time, and the duration of the test should not exceed one second.

A or B port
Control input
A or B port
Control input

§
A or B port VCC = 5.5 V 45 71 45 71 mA

A or B port VCC = 5.5 V 5 8 5 8 mA
A or B port VCC = 5.5 V 9 15 9 15 mA
Control input VCC = 5 V, VI = 2.5 V or 0.5 V 6 6 pF
A or B port VCC = 5 V, VO = 2.5 V or 0.5 V 16 16 pF

VCC = 4.5 V, II = –18 mA –1.2 –1.2 V

IOH = –3 mA 2.4 3.3 2.4 3.3

VCC = 4.5 V

= 4.5

CC

VCC = 5.5 V, VI = 5.5 V 0.4 0.4 mA

,

=

CC

,

=

CC

VCC = 5.5 V, VO = 0 –100 –225 –100 –225 mA

IOH = –12 mA 2 3.2
IOH = –15 mA 2 3.1
IOL = 48 mA 0.38 0.55
IOL = 64 mA 0.42 0.55

=

I

=

I

70 70
20 20

–0.65 –0.65

–0.6 –0.6

V

µ

timing requirements over recommended ranges of supply voltage and operating free-air
temperature (unless otherwise noted)

VCC = 5 V,

TA = 25°C
MIN MAX MIN MAX MIN MAX

t

w

t

su

t

h

Pulse duration, LEAB or LEBA low 7 8 7 ns
Setup time, data before LEAB or LEBA↑ High or low 4.5 5.5 4.5 ns
Hold time, data after LEAB or LEBA↑ High or low 1.5 1.5 1.5 ns

SN54BCT543 SN74BCT543

UNIT

2–4

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

SN54BCT543, SN74BCT543

A or B

B or A

ns

LE

A or B

ns

OE

A or B

ns

OE

A or B

ns

CE

A or B

ns

CE

A or B

ns

OCTAL REGISTERED TRANSCEIVERS

WITH 3-STATE OUTPUTS

SCBS026C – NOVEMBER 1988 – REVISED APRIL 1994

switching characteristics (see Note 2)

VCC = 5 V,
CL = 50 pF,

PARAMETER

t

PLH

t

PHL

t

PLH

t

PHL

t

PZH

t

PZL

t

PHZ

t

PLZ

t

PZH

t

PZL

t

PHZ

t
†
NOTE 2: Load circuits and voltage waveforms are shown in Section 1.

PLZ

For conditions shown as MIN or MAX, use the appropriate value specified under recommended operating conditions.

FROM

(INPUT)

TO

(OUTPUT)

R1 = 500 Ω,
R2 = 500 Ω,
TA = 25°C

′BCT543 SN54BCT543 SN74BCT543

MIN TYP MAX MIN MAX MIN MAX

2 5.7 7.5 2 9.9 2 8.8
2 6.3 8.2 2 9.7 2 9.6
2 8.2 10.3 2 13.9 2 12.9
2 8.5 10.6 2 13.2 2 12.7
1 6.8 8.6 1 11.4 1 10.7
1 8.7 10.8 1 12.8 1 12.3
1 5.5 7.2 1 8.8 1 8.1
1 4.7 6.4 1 8.1 1 7.2
1 7.6 9.8 1 12.8 1 12
1 9.5 11.6 1 13.8 1 13.5
1 5.8 7.5 1 9.3 1 8.5
1 4.8 6.7 1 8.4 1 7.6

VCC = 4.5 V to 5.5 V,
CL = 50 pF,
R1 = 500 Ω,
R2 = 500 Ω,
TA = MIN to MAX

†

UNIT

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

2–5

SN54BCT543, SN74BCT543
OCTAL REGISTERED TRANSCEIVERS
WITH 3-STATE OUTPUTS

SCBS026C – NOVEMBER 1988 – REVISED APRIL 1994

2–6

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

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