SN54BCT620A, SN74BCT620A

OCTAL BUS TRANSCEIVERS

WITH 3-STATE OUTPUTS

SCBS001B – SEPTEMBER 1987 – REVISED NOVEMBER 1993

2–2

POST OFFICE BOX 655303

logic diagram (positive logic)

2

A1

B1

EN1

19

EN2

1

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

OEAB

1

To Seven Other Channels

OEBA

OEAB

19

1

18

2

1

1

† This symbol is in accordance with ANSI/IEEE Std 91-1984

and IEC Publication 617-12.

– 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

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

– 0.5 V to 5.5 V

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

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

–30 mA

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

Current into any output in the low state: SN54BCT620A

96 mA

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

SN74BCT620A

128 mA

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

Operating free-air temperature range:

SN54BCT620A

– 55

°C to 125°C

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

SN74BCT620A

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.

recommended operating conditions

SN54BCT620A

SN74BCT620A

UNIT

MIN

NOM

MAX

MIN

NOM

MAX

UNIT

VCC

Supply voltage

4.5

5

5.5

4.5

5

5.5

V

VIH

High-level input voltage

2

2

V

VIL

Low-level input voltage

0.8

0.8

V

IIK

Input clamp current

–18

–18

mA

IOH

High level output current

A port

–3

–3

mA

IOH

High-level output current

B port

–12

–15

mA

IOL

Low level output current

A port

20

24

mA

IOL

Low-level output current

B port

48

64

mA

TA

Operating free-air temperature

–55

125

0

70

°C