SN75971B

SCSI DIFFERENTIAL CONVERTER-DATA

SLLS322A – NOVEMBER 1999 – REVISED JANUARY 2000

7

POST OFFICE BOX 655303

switching characteristics over recommended of operating conditions (unless otherwise noted)

PARAMETER

TEST CONDITIONS

MIN

MAX

UNIT

See Figures 3 and 4

3

14

SN75971B1

VCC = 5 V,

TA = 25°C, See Figures 3 and 4

4

12

tt

Delay time, A to B, high- to low-

VCC = 5 V,

TA = 70°C, See Figures 3 and 4

4.9

12.9

ns

td1, td2

y,

,

g

level or low- to high-level output

See Figures 3 and 4

5

12

ns

SN75971B2

VCC = 5 V,

TA = 25°C, See Figures 3 and 4

6.2

10.2

VCC = 5 V,

TA = 70°C, See Figures 3 and 4

6.9

10.9

See Figures 5 and 6

5.4

18.1

SN75971B1

VCC = 5 V,

TA = 25°C, See Figures 5 and 6

6.5

15.4

td3 td4

Delay time, B to A, high- to low-

VCC = 5 V,

TA = 70°C, See Figures 5 and 6

7.2

16.1

ns

td3, td4

y,

,

g

level or low- to high-level output

See Figures 5 and 6

7.7

15

ns

SN75971B2

VCC = 5 V,

TA = 25°C, See Figures 5 and 6

8.7

13.2

VCC = 5 V,

TA = 70°C, See Figures 5 and 6

9.4

13.9

SN75971B1

A to B

See Figures 5 and 6

8

t k( )

Skew part to part†

SN75971B1

B to A

See Figures 5 and 6

9

ns

tsk(pp)

Skew, part-to-part†

SN75971B2

A to B

See Figures 5 and 6

4

ns

SN75971B2

B to A

See Figures 5 and 6

5

tsk(p)

Pulse skew‡

4

ns

tdis1

Disable time, A to B

See Figures 3 and 4

200

ns

tdis2

Disable time, B to A

See Figures 5 and 6

35

ns

ten1

Enable time, A to B

See Figures 3 and 4

65

ns

ten2

Enable time, B to A

See Figures 5 and 6

65

ns

ten(TX)

Enable time, receive-to-transmit

See Figure 7

142

ns

† 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.

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