SN75LBC971A

SCSI DIFFERENTIAL CONVERTER-DATA

SLLS186B – OCTOBER 1994 – REVISED JULY 1997

7

POST OFFICE BOX 655303

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

PARAMETER

TEST CONDITIONS

MIN

MAX

UNIT

Dl

ti

A t B hih t l

l

l

See Figures 3 and 4

8.5

25.3

ns

td1, td2

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

low- to high-level output

VCC = 5 V,

TA = 25°C, See Figures 3 and 4

10

18

ns

low- to high-level out ut

VCC = 5 V,

TA = 70°C, See Figures 3 and 4

12.5

20.5

ns

Dl

ti

B t A hih t l

l

l

See Figures 5 and 6

21.5

36.2

ns

td3, td4

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

low- to high-level output

VCC = 5 V,

TA = 25°C, See Figures 5 and 6

23.6

32.6

ns

low- to high-level out ut

VCC = 5 V,

TA = 70°C, See Figures 5 and 6

24.4

33.4

ns

tsk(lim)

Skew limit

A to B†

See Figures 5 and 6

8

ns

tsk(lim)

Skew limit

B to A

See Figures 5 and 6

9

ns

tsk(p)

Pulse skew‡

6

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

† This parameter is applicable at one VCC and operating temperature within the recommended operating conditions and to any two devices.

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