SN74F623DWR [TI]

Octal Bus Transceivers With 3-State Outputs 20-SOIC 0 to 70;


型号：	SN74F623DWR
厂家：	TEXAS INSTRUMENTS
描述：	Octal Bus Transceivers With 3-State Outputs 20-SOIC 0 to 70 总线收发器输出元件
文件：	总5页 (文件大小：79K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

SN54F623, SN74F623

OCTAL BUS TRANSCEIVERS

WITH 3-STATE OUTPUTS

SDFS087 – MARCH 1987 – REVISED OCTOBER 1993

SN54F623 . . . J PACKAGE

SN74F623 . . . DW OR N PACKAGE

(TOP VIEW)

• Local Bus-Latch Capability

• Noninverting Logic

• Package Options Include Plastic

Small-Outline Packages, Ceramic Chip

Carriers, and Standard Plastic and Ceramic

300-mil DIPs

OEAB

OEBA

GND

description

These octal bus transceivers are designed for

asynchronous communication between data

buses. Thecontrolfunctionimplementationallows

for maximum flexibility in timing.

11 B8

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.

SN54F623 . . . FK PACKAGE

(TOP VIEW)

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.

20 19

17 B2

9 10 11 12 13

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

OPERATION

OEBA

OEAB

B data to A bus

B data to A bus,

A data to B bus

Isolation

A data to B bus

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.

2–1

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

SN54F623, SN74F623

OCTAL BUS TRANSCEIVERS

WITH 3-STATE OUTPUTS

SDFS087 – MARCH 1987 – REVISED OCTOBER 1993

†

logic symbol

logic diagram (positive logic)

OEBA

EN1

EN2

OEBA

OEAB

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

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

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

Input current range, I . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –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

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

UNIT

MIN NOM

MAX

MIN NOM

MAX

Supply voltage

4.5

5.5

4.5

5.5

High-level input voltage

Low-level input voltage

Input clamp current

0.8

– 18

– 3

0.8

– 18

– 3

– 15

A1–A8

B1–B8

A1–A8

B1–B8

High-level output current

– 12

Low-level output current

Operating free-air temperature

– 55

125

°C

2–2

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

SN54F623, SN74F623

OCTAL BUS TRANSCEIVERS

WITH 3-STATE OUTPUTS

SDFS087 – MARCH 1987 – REVISED OCTOBER 1993

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

otherwise noted)

SN54F623

SN74F623

PARAMETER

TEST CONDITIONS

UNIT

†

MIN TYP

MAX

MIN TYP

MAX

= 4.5 V,

= 4.5 V

I = – 18 mA

– 1.2

= – 1 mA

= – 3 mA

2.5

2.4

3.4

3.3

3.2

2.5

2.4

3.4

3.3

A1–A8

B1–B8

= – 3 mA

= – 12 mA

= – 15 mA

= – 1 mA to –3 mA

= 20 mA

3.1

Any output

A1–A8

= 4.75 V,

= 4.5 V

2.7

0.3

0.5

= 24 mA

0.35

0.42

0.5

= 48 mA

0.38

0.55

B1–B8

= 64 mA

0.55

A and B ports

OEAB or OEBA

A and B ports

OEAB or OEBA

A and B ports

OEAB or OEBA

A1–A8

V = 5.5 V

0.1

= 5.5 V

= 5.5 V,

µA

V = 7 V

0.1

‡

V = 2.7 V

– 0.65

– 0.6

– 150

– 0.65

– 0.6

– 150

– 225

140

‡

V = 0.5 V

– 60

= 0

B1–B8

– 100

– 225 – 100

140

= 5.5 V,

= 5.5 V

Any output = 4.5 V

110

CCH

CCL

OEAB or OEBA = 4.5 V,

A1–A8 = GND

140

130

140

130

OEBA or A1–A8 = 4.5 V,

OEAB = GND

= 5.5 V

CCZ

†

‡

All typical values are at V

= 5 V, T = 25°C.

For I/O ports, the parameters I and I 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.

2–3

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

SN54F623, SN74F623

OCTAL BUS TRANSCEIVERS

WITH 3-STATE OUTPUTS

SDFS087 – MARCH 1987 – REVISED OCTOBER 1993

switching characteristics (see Note 2)

= 5 V,

= 50 pF,

= 500 Ω,

= 25°C

= 4.5 V to 5.5 V,

= 50 pF,

= 500Ω,

FROM

(INPUT)

(OUTPUT)

†

PARAMETER

UNIT

= MIN to MAX

′F623

TYP

3.6

4.6

3.6

4.1

8.1

7.1

4.1

7.6

6.6

5.6

6.6

SN54F623

SN74F623

MIN

1.2

2.2

1.2

1.7

3.1

2.8

1.7

2.8

2.2

3.2

MAX

5.5

MIN

1.1

1.6

1.1

1.6

2.7

2.5

1.6

1.5

2.7

2.8

1.9

3.1

MAX

MIN

1.2

1.7

1.2

1.7

3.1

2.8

1.7

2.8

2.9

2.2

3.2

MAX

6.8

6.5

7.5

6.5

7.5

PLH

PHL

PLH

PHL

PZH

5.5

6.5

10.5

9.5

6.5

6.8

12.4

10.3

8.3

7.4

OEBA

OEAB

PZL

PHZ

7.5

PLZ

PZH

11.5

9.5

PZL

8.5

PHZ

10.7

PLZ

†

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.

2–4

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

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any product or service without notice, and advise customers to obtain the latest version of relevant information

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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.

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DEATH, PERSONAL INJURY, OR SEVERE PROPERTY OR ENVIRONMENTAL DAMAGE (“CRITICAL

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safeguards must be provided by the customer to minimize inherent or procedural hazards.

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