Datasheet SN74BCT623N, SN74BCT623DW, SN74BCT623DWR, SNJ54BCT623W, SNJ54BCT623FK Datasheet (Texas Instruments)

SN54BCT623, SN74BCT623

OPERATION

OCTAL BUS TRANSCEIVERS

WITH 3-STATE OUTPUTS

SCBS020A – SEPTEMBER 1988 – REVISED NOVEMBER 1993

• State-of-the-Art BiCMOS Design

Significantly Reduces I

CCZ

• ESD Protection Exceeds 2000 V

Per MIL-STD-883C, Method 3015

• Package Options Include Plastic

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

description

The ′BCT623 bus transceiver is designed for
asynchronous communication between data
buses. The control function implementation allows
for maximum flexibility in timing. The ′BCT623
provides true data at its outputs.

This device allows data transmission from the A
bus to the B bus or from the B bus to the A bus
depending upon the logic levels at the
output-enable (OEAB and OEBA

The output-enable inputs can be used to disable
the device so that the buses are effectively
isolated. The dual-enable configuration gives the
transceivers the capability of storing data by
simultaneously enabling OEAB and OEBA
output reinforces its input in this configuration.
When both OEAB and OEBA are enabled and all
other data sources to the two sets of bus lines are
at high impedance, both sets of bus lines (16 in all)
will remain at their last states.

) inputs.

. Each

SN54BCT623 ...J OR W PACKAGE

SN74BCT623 . . . DW OR N PACKAGE

OEAB

SN54BCT623 . . . FK PACKAGE

A3
A4
A5
A6
A7

(TOP VIEW)

A1
A2
A3
A4
A5
A6
A7
A8

GND

3 2 1 20 19

4
5
6
7
8

9

1

20

2

19

3

18

4

17

5

16

6

15

7

14

8

13

9

12

10

11

(TOP VIEW)

B8

V

CC

B7

A2A1OEAB

10 11 12 13

A8

V

CC

OEBA
B1
B2
B3
B4
B5
B6
B7
B8

OEBA

18
17
16
15
14

B6

B1
B2
B3
B4
B5

GND

The SN54BCT623 is characterized for operation
over the full military temperature range of –55°C
to 125°C. The SN74BCT623 is characterized for
operation from 0°C to 70°C.

OEBA 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.

FUNCTION TABLE

INPUTS

L L B data to A bus
L H

H L Isolation
H H A data to B bus

B data to A bus,

A data to B bus

Copyright  1993, Texas Instruments Incorporated

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

2–1

SN54BCT623, SN74BCT623

UNIT

IOHHigh-level output current

mA

IOLLow-level output current

mA

OCTAL BUS TRANSCEIVERS
WITH 3-STATE OUTPUTS

SCBS020A – SEPTEMBER 1988 – REVISED NOVEMBER 1993

19
1

2

3
4
5

6
7

8
9

†

EN1
EN2

18

17
16

15
14

13
12
11

B1

B2
B3

B4
B5

B6
B7
B8

1

1

2

1

logic diagram (positive logic)

OEBA

OEAB

19

1

A1 B1

To Seven Other Channels

182

logic symbol

OEBA
OEAB

A1

A2
A3
A4

A5
A6

A7
A8

†

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

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: SN54BCT623 96 mA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

SN74BCT623 128 mA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Operating free-air temperature range: SN54BCT623 – 55°C to 125°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

SN74BCT623 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 5.5 V. . . . . . . . . . . . . . .

– 0.5 V to V

‡

CC

recommended operating conditions

V

CC

V

IH

V

IL

I

IK

T

A

2–2

SN54BCT623 SN74BCT623

MIN NOM MAX MIN NOM MAX

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

p

p

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

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

A port –3 –3
B port –12 –15
A port 20 24
B port 48 64

SN54BCT623, SN74BCT623

PARAMETER

TEST CONDITIONS

UNIT

A port

V

V

A port

V

V

V

V

B port

V

V

I

V

V

V

mA

I

‡

V

V

V

A

I

‡

V

V

V

mA

I

§

V

V

0

mA

C

V

V

V

pF

OCTAL BUS TRANSCEIVERS

WITH 3-STATE OUTPUTS

SCBS020A – SEPTEMBER 1988 – REVISED NOVEMBER 1993

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

SN54BCT623 SN74BCT623

MIN TYP†MAX MIN TYP†MAX

V

IK

p

V

OH

B port VCC = 4.5 V

p

OL

p

I

IH

IL

OS

I

CCL

I

CCH

I

CCZ

C

i

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
OEAB or OEBA
A or B port
OEAB or OEBA
A or B port
OEAB or OEBA
A port
B port
A to B VCC = 5.5 V 58 92 58 92 mA
A to B VCC = 5.5 V 33 53 33 53 mA

OEAB or OEBA VCC = 5 V, VI = 2.5 V or 0.5 V 5 5 pF
A to B
B to A

VCC = 4.5 V, II = –18 mA –1.2 –1.2 V

= 4.5

CC

= 4.5

CC

= 4.5

CC

= 5.5 V,

CC

= 5.5 V,

CC

= 5.5 V,

CC

= 5.5 V,

CC

VCC = 5.5 V 6 11 6 11 mA

= 5 V,

CC

IOH = –1 mA 2.5 3.4 2.5 3.4
IOH = –3 mA 2.4 3.3 2.4 3.3
IOH = –3 mA 2.4 3.3 2.4 3.3
IOH = –12 mA 2 3.2
IOH = –15 mA 2 3.1
IOL = 20 mA 0.3 0.5
IOL = 24 mA 0.35 0.5
IOL = 48 mA 0.38 0.55
IOL = 64 mA 0.42 0.55

= 5.5

I

= 2.7

I

= 0.5

I

=

O

= 2.5 V or 0.5

O

–60 –150 –60 –150

–100 –225 –100 –225

12 12

1 1

0.1 0.1
70 70
20 20

–0.65 –0.65

–0.6 –0.6

9 9

V

µ

p

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

2–3

SN54BCT623, SN74BCT623

A

B

ns

B

A

ns

OEBA

A

ns

OEBA

A

ns

OEAB

B

ns

OEAB

B

ns

OCTAL BUS TRANSCEIVERS
WITH 3-STATE OUTPUTS

SCBS020A – SEPTEMBER 1988 – REVISED NOVEMBER 1993

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

′BCT623 SN54BCT623 SN74BCT623

MIN TYP MAX MIN MAX MIN MAX

0.5 3.1 4.7 0.5 5.3 0.5 5.2

1.7 4.9 6.9 1.7 7.6 1.7 7.4

0.9 4.1 5.9 0.9 6.8 0.9 6.7

1.8 5.3 7.6 1.8 8.3 1.8 8

3.1 6.8 9.1 3.1 10.7 3.1 10.6

3.3 7.2 9.6 3.3 11.3 3.3 10.7

1.9 6.1 8.3 1.9 10.6 1.9 9.8

1.1 4.6 7 1.1 8.1 1.1 7.8
2 5 6.8 2 7.8 2 7.6

2.7 6.2 8 2.7 9.3 2.7 8.9

1.1 4.6 6.5 1.1 8 1.1 7.7

0.3 3.2 6.3 0.3 7.2 0.3 7.1

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

†

UNIT

2–4

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

IMPORTANT NOTICE

T exas Instruments and its subsidiaries (TI) reserve the right to make changes to their products or to discontinue
any product or service without notice, and advise customers to obtain the latest version of relevant information
to verify, before placing orders, that information being relied on is current and complete. All products are sold
subject to the terms and conditions of sale supplied at the time of order acknowledgement, including those
pertaining to warranty, patent infringement, and limitation of liability.

TI warrants performance of its semiconductor products to the specifications applicable at the time of sale in
accordance with TI’s standard warranty. Testing and other quality control techniques are utilized to the extent
TI deems necessary to support this warranty . Specific testing of all parameters of each device is not necessarily
performed, except those mandated by government requirements.

CERTAIN APPLICATIONS USING SEMICONDUCTOR PRODUCTS MAY INVOLVE POTENTIAL RISKS OF
DEATH, PERSONAL INJURY, OR SEVERE PROPERTY OR ENVIRONMENTAL DAMAGE (“CRITICAL
APPLICATIONS”). TI SEMICONDUCTOR PRODUCTS ARE NOT DESIGNED, AUTHORIZED, OR
WARRANTED TO BE SUITABLE FOR USE IN LIFE-SUPPORT DEVICES OR SYSTEMS OR OTHER
CRITICAL APPLICA TIONS. INCLUSION OF TI PRODUCTS IN SUCH APPLICATIONS IS UNDERST OOD TO
BE FULLY AT THE CUSTOMER’S RISK.

In order to minimize risks associated with the customer’s applications, adequate design and operating
safeguards must be provided by the customer to minimize inherent or procedural hazards.

TI assumes no liability for applications assistance or customer product design. TI does not warrant or represent
that any license, either express or implied, is granted under any patent right, copyright, mask work right, or other
intellectual property right of TI covering or relating to any combination, machine, or process in which such
semiconductor products or services might be or are used. TI’s publication of information regarding any third
party’s products or services does not constitute TI’s approval, warranty or endorsement thereof.

Copyright  1998, Texas Instruments Incorporated