Datasheet SN54F623J, SN74F623DW, SN74F623DWR, SN74F623N, SNJ54F623FK Datasheet (Texas Instruments)

SN54F623, SN74F623

OCTAL BUS TRANSCEIVERS

WITH 3-STATE OUTPUTS

SDFS087 – MARCH 1987 – REVISED OCTOBER 1993

Copyright  1993, Texas Instruments Incorporated

2–1

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

• Local Bus-Latch Capability

• Noninverting Logic

• Package Options Include Plastic

Small-Outline Packages, Ceramic Chip
Carriers, and Standard Plastic and Ceramic
300-mil DIPs

description

These octal bus transceivers are designed for
asynchronous communication between data
buses. The control function implementation allows
for maximum flexibility in timing.

These devices allow 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

) inputs.

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

. Each
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.

The SN54F623 is characterized for operation over
the full military temperature range of –55°C to
125°C. The SN74F623 is characterized for
operation from 0°C to 70°C.

FUNCTION TABLE

INPUTS

OEBA OEAB

OPERATION

L L B data to A bus
L H

B data to A bus,

A data to B bus
H L Isolation
H H A data to B bus

1
2
3
4
5
6
7
8
9
10

20
19
18
17
16
15
14
13
12
11

OEAB

A1
A2
A3
A4
A5
A6
A7
A8

GND

V

CC

OEBA
B1
B2
B3
B4
B5
B6
B7
B8

SN54F623 ...J PACKAGE

SN74F623 . . . DW OR N PACKAGE

(TOP VIEW)

3 2 1 20 19

9 10 11 12 13

4
5
6
7
8

18
17
16
15
14

B1
B2
B3
B4
B5

A3
A4
A5
A6
A7

SN54F623 . . . FK PACKAGE

(TOP VIEW)

A2A1OEAB

B7

B6

OEBA

A8

GND

B8

V

CC

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.

SN54F623, SN74F623
OCTAL BUS TRANSCEIVERS
WITH 3-STATE OUTPUTS

SDFS087 – MARCH 1987 – REVISED OCTOBER 1993

2–2

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

logic symbol

†

logic diagram (positive logic)

2

A1 B1

EN1

19

EN2

1

OEAB

2

A1

3

A2

B1

18

4

A3

5

A4

6

A5

7

A6

8

A7

9

A8

B2

17

B3

16

B5

14

B4

15

B6

13

B8

11

B7

12

OEBA

1

OEBA

OEAB

19

1

182

To Seven Other Channels

†

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

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

Input voltage range, V

I

(excluding I/O ports) (see Note 1) –1.2 V to 7 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Input current range, I

IK

–30 mA to 5 mA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Voltage range applied to any output in the disabled or power-off state –0.5 V to 5.5 V. . . . . . . . . . . . . . . . . . . .

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

CC

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

Current into any output in the low state: SN54F623 (A1–A8) 40 mA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

SN54F623 (B1–B8) 96 mA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

SN74F623 (A1–A8) 48 mA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

SN74F623 (B1–B8) 128 mA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Operating free-air temperature range: SN54F623 –55°C to 125°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

SN74F623 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-voltage ratings may be exceeded provided the input-current ratings are observed.

recommended operating conditions

SN54F623 SN74F623

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

p

A1–A8 –3 –3

IOHHigh-level output current

B1–B8 –12 –15

mA

p

A1–A8 20 24

IOLLow-level output current

B1–B8 48 64

mA

T

A

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

SN54F623, SN74F623

OCTAL BUS TRANSCEIVERS

WITH 3-STATE OUTPUTS

SDFS087 – MARCH 1987 – REVISED OCTOBER 1993

2–3

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

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

SN54F623 SN74F623

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 = – 1 mA 2.5 3.4 2.5 3.4

A1–A8

IOH = – 3 mA 2.4 3.3 2.4 3.3

VCC = 4.5 V

IOH = – 3 mA 2.4 3.3 2.4 3.3

V

OH

B1–B8

IOH = – 12 mA 2 3.2

V

IOH = – 15 mA 2 3.1

Any output VCC = 4.75 V , IOH = – 1 mA to –3 mA 2.7

IOL = 20 mA 0.3 0.5

A1–A8

IOL = 24 mA 0.35 0.5

VOLV

CC

= 4.5

V

IOL = 48 mA 0.38 0.55

V

B1–B8

IOL = 64 mA 0.42 0.55

A and B ports

VI = 5.5 V 1 1

I

I

OEAB or OEBA

V

CC

= 5.5

V

VI = 7 V 0.1 0.1

mA

A and B ports

70 70

I

IH

‡

OEAB or OEBA

V

CC

= 5.5 V,

V

I

= 2.7

V

20 20

µ

A

A and B ports

– 0.65 – 0.65

I

IL

‡

OEAB or OEBA

V

CC

=

5.5 V

,

V

I

=

0.5 V

– 0.6 – 0.6

mA

A1–A8

–60 – 150 –60 – 150

I

OS

§

B1–B8

V

CC

=

5.5 V

,

V

O

=

0

– 100 – 225 –100 – 225

mA

I

CCH

VCC = 5.5 V, Any output = 4.5 V 110 140 110 140 mA

I

CCL

VCC = 5.5 V

OEAB or OEBA = 4.5 V,
A1–A8 = GND

110 140 110 140 mA

I

CCZ

VCC = 5.5 V

OEBA or A1–A8 = 4.5 V,
OEAB = GND

99 130 99 130 mA

†

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 shorted at a time, and the duration of the short circuit should not exceed one second.

SN54F623, SN74F623
OCTAL BUS TRANSCEIVERS
WITH 3-STATE OUTPUTS

SDFS087 – MARCH 1987 – REVISED OCTOBER 1993

2–4

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

switching characteristics (see Note 2)

PARAMETER

FROM

(

INPUT

)

TO

(

OUTPUT

)

VCC = 5 V,
CL = 50 pF,
RL = 500 Ω,
TA = 25°C

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

†

UNIT

(INPUT)

(OUTPUT)

′F623 SN54F623 SN74F623

MIN TYP MAX MIN MAX MIN MAX

t

PLH

1.2 3.6 5.5 1.1 6.8 1.2 6.5

t

PHL

A

B

2.2 4.6 7 1.6 8 1.7 7.5

ns

t

PLH

1.2 3.6 5.5 1.1 6.8 1.2 6.5

t

PHL

B

A

1.7 4.1 6.5 1.6 8 1.7 7.5

ns

t

PZH

3.1 8.1 10.5 2.7 12.4 3.1 12

t

PZL

OEBA

A

2.8 7.1 9.5 2.5 10.3 2.8 10

ns

t

PHZ

1.7 4.1 6.5 1.6 8.3 1.7 7.5

t

PLZ

OEBA

A

1.7 4.1 6.5 1.5 7.4 1.7 7

ns

t

PZH

2.8 7.6 10 2.7 12 2.8 11.5

t

PZL

OEAB

B

2.8 6.6 9 2.8 10 2.9 9.5

ns

t

PHZ

2.2 5.6 8.5 1.9 10 2.2 10

t

PLZ

OEAB

B

3.2 6.6 9 3.1 10.7 3.2 10

ns

†

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

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

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Copyright  1998, Texas Instruments Incorporated