SN75970B

SCSI DIFFERENTIAL CONVERTER-CONTROL

SLLS323A – NOVEMBER 1999 – REVISED JANUARY 2000

8

POST OFFICE BOX 655303

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

otherwise noted)

PARAMETER

FROM

(INPUT)

TO

(OUTPUT)

TEST CONDITIONS

MIN

TYP†

MAX

UNIT

AATN –

AC/D –

BATN

±

BC/D

±

See Figure 3

35

17 7

’B1

AI/O –

AMSG –

BI/O

±

BMSG

±

See Figure 3

3.5

17.7

B1

AACK

BACK

±

3.1

15.3

AACK –

AREQ –

BACK

±

BREQ

±

VCC = 5 V, TA = 25°C

4.2

12.2

td1 td2

Delay time, A to B, high- to

low level or low to high lev

AREQ –

BREQ

±

VCC = 5 V, TA = 70°C

4.7

12.7

ns

td1, td2

low-level or low- to high-lev-

el output

AATN –

AC/D –

BATN

±

BC/D

±

See Figure 3

55

15 7

ns

’B2

AI/O –

AMSG –

BI/O

±

BMSG

±

See Figure 3

5.5

15.7

B2

AACK

BACK

±

4.5

13.3

AACK –

AREQ –

BACK

±

BREQ

±

VCC = 5 V, TA = 25°C

6.2

10.2

AREQ –

BREQ

±

VCC = 5 V, TA = 70°C

6.7

10.7

t k( )

Skew part to part

’B1

AACK –

AREQ –

BACK

±

BREQ

±

See Note 4

8

ns

tsk(pp)

Skew, part-to-part

’B2

AACK –

AREQ –

BACK

±

BREQ

±

See Note 4

4

ns

t k( )

Pulse skew

’B1

AACK –

AREQ –

BACK

±

BREQ

±

See Note 5

8

ns

tsk(p)

Pulse skew

’B2

AACK –

AREQ –

BACK

±

BREQ

±

See Note 5

4

ns

’B1

BATN

±

BC/D

±

BI/O

±

BMSG

±

AATN –

AC/D –

AI/O –

AMSG –

See Figure 4

5.1

17.9

B1

BACK

±

AACK

5.3

18

BACK

±

BREQ

±

AACK –

AREQ –

VCC = 5 V, TA = 25°C

6.3

15.2

td3 td4

Delay time, B to A, high- to

low level or low to high lev

BREQ

±

AREQ –

VCC = 5 V, TA = 70°C

6.7

15.6

ns

td3, td4

low-level or low- to high-lev-

el output

’B2

BATN

±

BC/D

±

BI/O

±

BMSG

±

AATN –

AC/D –

AI/O –

AMSG –

See Figure 4

7.3

14.6

ns

B2

BACK

±

AACK

7.5

14.2

BACK

±

BREQ

±

AACK –

AREQ –

VCC = 5 V, TA = 25°C

8.5

13

BREQ

±

AREQ –

VCC = 5 V, TA = 70°C

8.9

13.4

t k( )

Skew part to part

’B1

BACK

±

BREQ

±

AACK –

AREQ –

See Note 4

9

ns

tsk(pp)

Skew part-to-part

’B2

BACK

±

BREQ

±

AACK –

AREQ –

See Note 4

4.5

ns

t k( )

Pulse skew

’B1

BACK

±

BREQ

±

AACK –

AREQ –

See Note 5

8

ns

tsk(p)

Pulse skew

’B2

BACK

±

BREQ

±

AACK –

AREQ –

See Note 5

4

ns

† All typical values are at VCC = 5 V, TA = 25°C.

NOTES:

4. Part-to-part skew is the magnitude of the difference in propagation delay times between any two devices when both operate with

the same supply voltages, the same temperature, and the same loads.

5. Pulse skew is the difference between the high-to-low and low-to-high propagation delay times of any single channel.