Datasheet SNJ54BCT544FK, SNJ54BCT544JT, SNJ54BCT544W Datasheet (Texas Instruments)

SN54BCT544, SN74BCT544

OCTAL REGISTERED TRANSCEIVERS

WITH 3-STATE OUTPUTS

SCBS039B – NOVEMBER 1988 – REVISED NOVEMBER 1993

Copyright  1993, Texas Instruments Incorporated

1

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

• State-of-the-Art BiCMOS Design

Significantly Reduces I

CCZ

• 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.

FUNCTION TABLE

†

INPUTS

OUTPUT

CEAB LEAB OEAB A

B

H X X X Z
L XHX Z
L HLX B

0

‡

L LLL H
L L L H 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.

SN54BCT544 . . . JT OR W PACKAGE

SN74BCT544 . . . 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

V

CC

CEBA
B1
B2
B3
B4
B5
B6
B7
B8
LEAB
OEAB

SN54BCT544 . . . FK PACKAGE

(TOP VIEW)

3212827

12 13

5
6
7
8
9
10
11

25
24
23
22
21
20
19

B2
B3
B4
NC
B5
B6
B7

A2
A3
A4

NC

A5
A6
A7

426

14 15 16 1718

A8

CEAB

GND

NC

OEAB

LEAB

B8

A1

OEBA

LEBANCCEBA

B1

V

CC

NC – No internal connection

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.

SN54BCT544, SN74BCT544
OCTAL REGISTERED TRANSCEIVERS
WITH 3-STATE OUTPUTS

SCBS039B – NOVEMBER 1988 – REVISED NOVEMBER 1993

2

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

logic symbol

†

4

2C6

14

3

A1

4

A2

B1

22

5D

5

A3

6

A4

7

A5

8

A6

9

A7

10

A8

B2

21

B3

20

B5

18

B4

19

B6

17

B8

15

B7

16

LEAB

3

G2

11

CEAB

2EN4

13

OEAB

1C5

1

LEBA

G1

23

CEBA

1EN3

2

OEBA

6D

†

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

logic diagram (positive logic)

OEBA

CEBA

LEBA

OEAB

CEAB

LEAB

A1

B1

C1
1D

C1
1D

2

23

1

13

11

14

3

22

To Seven Other Channels

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

SN54BCT544, SN74BCT544

OCTAL REGISTERED TRANSCEIVERS

WITH 3-STATE OUTPUTS

SCBS039B – NOVEMBER 1988 – REVISED NOVEMBER 1993

3

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

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

†

Supply voltage range, V

CC

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

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

O

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

Voltage range applied to any output in the high state, VO – 0.5 V to V

CC

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

Input clamp current –30 mA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Current into any output in the low state: SN54BCT544 96 mA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

SN74BCT544 128 mA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Operating free-air temperature range: SN54BCT544 – 55°C to 125°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

SN74BCT544 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 negative voltage rating may be exceeded if the input clamp-current rating is observed.

recommended operating conditions

SN54BCT544 SN74BCT544

MIN NOM MAX MIN NOM MAX

UNIT

V

CC

Supply voltage 4.5 5 5.5 4.5 5 5.5 V

V

IH

High-level input voltage 2 2 V

V

IL

Low-level input voltage 0.8 0.8 V

I

IK

Input clamp current –18 –18 mA

I

OH

High-level output current –12 –15 mA

I

OL

Low-level output current 48 64 mA

T

A

Operating free-air temperature –55 125 0 70 °C

SN54BCT544, SN74BCT544
OCTAL REGISTERED TRANSCEIVERS
WITH 3-STATE OUTPUTS

SCBS039B – NOVEMBER 1988 – REVISED NOVEMBER 1993

4

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

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

SN54BCT544 SN74BCT544

PARAMETER

TEST CONDITIONS

MIN TYP†MAX MIN TYP†MAX

UNIT

V

IK

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

IOH = –12 mA 2 3.2

V

OH

IOH = –15 mA 2 3.1

V

VCC = 4.75 V , IOH = –3 mA 2.7

IOL = 48 mA 0.38 0.55

V

OL

V

CC

= 4.5

V

IOL = 64 mA 0.42 0.55

V

I

I

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

I

IH

‡

VCC = 5.5 V, VI = 2.7 V 20 20 µA

I

IL

‡

VCC = 5.5 V, VI = 0.5 V –0.6 –0.6 mA

I

OS

§

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

I

CCH

VCC = 5.5 V 7 11 7 11 mA

I

CCL

VCC = 5.5 V 43 68 43 68 mA

I

CCZ

VCC = 5.5 V 9 15 9 15 mA

C

i

VCC = 5 V, VI = 2.5 V or 0.5 V 6 6 pF

C

io

VCC = 5 V, VO = 2.5 V or 0.5 V 16 16 pF

†

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.

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

VCC = 5 V,

TA = 25°C

SN54BCT544 SN74BCT544

UNIT

MIN MAX MIN MAX MIN MAX

t

w

Pulse duration, LEAB or LEBA low 7 8 7 ns

t

su

Setup time, data before LEAB or LEBA↑ High or low 5 5.5 5 ns

t

h

Hold time, data after LEAB or LEBA↑ High or low 1 1 1 ns

SN54BCT544, SN74BCT544

OCTAL REGISTERED TRANSCEIVERS

WITH 3-STATE OUTPUTS

SCBS039B – NOVEMBER 1988 – REVISED NOVEMBER 1993

5

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

switching characteristics over recommended ranges of supply voltage and operating free-air
temperature, C

L

= 50 pF, RL = 500 Ω (unless otherwise noted) (see Note 2)

PARAMETER

FROM

TO

VCC = 5 V,

TA = 25°C

SN54BCT544 SN74BCT544

UNIT

(INPUT)

(OUTPUT)

MIN MAX MIN MAX MIN MAX

t

PLH

2.4 7.6 2.4 10.3 2.4 9.7

t

PHL

A or B

B or A

3 7.6 3 8.9 3 8.5

ns

t

PLH

3.5 10.3 3.5 14.2 3.5 13.3

t

PHL

LEBA

A

4.8 10.2 4.8 12.7 4.8 12.3

ns

t

PLH

3.5 10.3 3.5 14.4 3.5 13.4

t

PHL

LEAB

B

4.8 10.3 4.8 12.8 4.8 12.4

ns

t

PZH

3 10.1 3 13.1 3 12.7

t

PZL

OE

or

CE

A or B

5.1 11.8 5.1 14.2 5.1 13.9

ns

t

PHZ

2.8 7.5 2 8.9 2.8 8.5

t

PLZ

OE or CE

A or B

2.3 7.2 2.3 9 2.3 8.2

ns

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

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Copyright  1998, Texas Instruments Incorporated