SN75970B

SCSI DIFFERENTIAL CONVERTER-CONTROL

SLLS323A – NOVEMBER 1999 – REVISED JANUARY 2000

9

POST OFFICE BOX 655303

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

otherwise noted) (continued)

PARAMETER

FROM

(INPUT)

TO

(OUTPUT)

TEST CONDITIONS

MIN

TYP†

MAX

UNIT

tPHL

Delay time, high- to low-level

TIMEOUT

DRVBUS

See Figure 5

200

ns

tPLH

Delay time, low- to high-level

TIMEOUT

DRVBUS

See Figure 5

200

ns

ABSY –

BBSY

±

200

tdis

Disable time

ARST –

BRST

±

See Figure 6

200

ns

ASEL –

BSEL

±

200

ABSY –

BBSY

±

40

ten

Enable time

ARST –

BRST

±

See Figure 6

55

ns

ASEL –

BSEL

±

39

tdis1

Disable time

BRST

±

ARST –

93

ns

tdis2

Disable time

BSEL

±

ASEL –

55

ns

tdis3

Disable time

BBSY

±

ABSY –

60

ns

ten1

Enable time

BRST

±

ARST –

See Figure 7

63

ns

ten2

Enable time

BSEL

±

ASEL –

45

ns

ten3

Enable time

BBSY

±

ABSY –

45

ns

ten4

Enable time

BSEL

±

ASEL –

92

ns

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