SN75971B_16 Datasheet, PDF (8/15 Pages) Texas Instruments – SCSI DIFFERENTIAL CONVERTER-DATA

SN75971B
SCSI DIFFERENTIAL CONVERTER-DATA
SLLS322A – NOVEMBER 1999 – REVISED JANUARY 2000
PARAMETER MEASUREMENT INFORMATION
5V
165 Ω
ADBn –
2 V or 0.8 V
VIH, VIL
BDBn–
BDBn +
75 Ω
VOD
VOH, VOL
165 Ω
VOH, VOL
NOTES: A. Resistance values are in ohms with a tolerance of ± 5%.
B. All input voltage levels are held to within 0.01 V.
C. The logical function is set with SDB at 0.8 V, DRVBUS at 3.5 V, and all others left open.
Figure 1. Differential Driver V_OD, V_OH, and V_OL Test Circuit
BDBn –
II
VI VID or VIT
BDBn +
ADBn –
VOL or VOL
IOH or IOL
NOTES: A. Resistance values are in ohms with a tolerance of ± 5%.
B. All input voltage levels are held to within 0.01 V.
C. The logical function is set with SDB and DRVBUS at 3.5 V, and all others left open.
Figure 2. Single-Ended Driver V_OH, V_OL, V_{IT +}, and V_{IT –} Test Circuit
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