SN74BCT979

9BIT REGISTERED BTL TRANSCEIVER

WITH PARITY GENERATOR/CHECKER

SCBS115A − OCTOBER 1990 − REVISED NOVEMBER 1993

8

POST OFFICE BOX 655303

POST OFFICE BOX 1443

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

PARAMETER

FROM

(INPUT)

TO

(OUTPUT)

VCC = 5 V,

TA = 25°C

MIN

MAX

UNIT

PARAMETER

(INPUT)

(OUTPUT)

MIN

TYP

MAX

MIN

MAX

UNIT

tPLH

LEAB

B

1.6

7.6

9.5

1.6

11.6

ns

tPHL

LEAB

B

2.7

8.1

10

2.7

11.7

ns

tPLH

LEAB

BPAR

2.3

7.3

9.2

2.3

10.8

ns

tPHL

LEAB

BPAR

(parity feed through)

4.6

9.3

11

4.6

13.3

ns

tPLH

LEAB

BPAR

4.7

10.7

13

4.7

16.2

ns

tPHL

LEAB

BPAR

(parity generated)

6.2

11.5

13.4

6.2

16

ns

tPLH

LEAB

ERRA

3.3

8.6

10.7

3.3

12.8

ns

tPHL

LEAB

ERRA

4.7

9.8

12

4.7

13.7

ns

tPLH

LEBA

AO

1.3

6.5

8.5

1.3

10

ns

tPHL

LEBA

AO

1.4

5.9

7.6

1.4

8.5

ns

tPLH

LEBA

APARO

1.7

5.9

7.7

1.7

9.1

ns

tPHL

LEBA

APARO

(parity feed through)

1.9

6

7.8

1.9

9

ns

tPLH

LEBA

APARO

3.5

9.3

11.5

3.5

14.1

ns

tPHL

LEBA

APARO

(parity generated)

3.1

8.2

10.3

3.1

12.2

ns

tPLH

LEBA

ERRB

3.4

8.7

10.8

3.4

12.7

ns

tPHL

LEBA

ERRB

4.6

9

11

4.6

12.5

ns

tPLH

OEAB

B

1.5

5.5

7

1.5

7.9

ns

tPHL

OEAB

B

4.9

10.4

12.1

4.9

14.1

ns

tPLH

OEAB

BPAR

1.4

5.4

6.9

1.4

7.8

ns

tPHL

OEAB

BPAR

4.8

10.6

12.5

4.8

14.9

ns

tPZH

OEBA

AO

1.4

6

7.8

1.4

9.2

ns

tPZL

OEBA

AO

6

10.7

12.5

6

14.6

ns

tPHZ

OEBA

AO

2.4

6.7

8.6

2.4

9.5

ns

tPLZ

OEBA

AO

1.2

4.7

6.3

1.2

7.1

ns

tPZH

OEBA

APARO

1.7

6.1

7.8

1.7

9.3

ns

tPZL

OEBA

APARO

1.4

5.1

6.7

1.4

7.8

ns

tPHZ

OEBA

APARO

2.7

6.8

8.6

2.7

9.5

ns

tPLZ

OEBA

APARO

1.2

4.7

6.2

1.2

7.1

ns

NOTE 3: Load circuits and waveforms are shown in Section 1.