SN75971B

SCSI DIFFERENTIAL CONVERTER-DATA

SLLS322A – NOVEMBER 1999 – REVISED JANUARY 2000

10

POST OFFICE BOX 655303

PARAMETER MEASUREMENT INFORMATION

Input (see Note A)

BDBn –

Output

15 pF

(see Note B)

ADBn –

VOH

~ 2.5 V

VOL

ten

td

td

tdis

3 V

1.5 V

0 V

Input

Output

0.5 V

t0

BDBn +

1.5 V

1.5 V

t0

or

NOTES: A. The input pulse is supplied by a generator having the following characteristics: PRR

≤ 1 MHz, 45% < duty cycle < 50%, tr ≤ 1 ns,

tf ≤ 1 ns, ZO =50 Ω.

B. CL includes probe and jig capacitance.

C. Resistance values are in ohms with a tolerance of

± 5%.

D. All input voltage levels are held to within 0.01 V.

Figure 5. B to A Propagation Delay Time Test Circuit

td3

td4

ten2

tdis2

SDB

DSENS

RESET

BDBn –

DRVBUS

ADBn –

Figure 6. B to A Timing Waveforms