DS2114

070198 3/6

TYPICAL SCSI BUS CONFIGURATION Figure 2

Termination Power Line

SCSI

BUS

TRANSCEIVER

SCSI

BUS

TRANSCEIVER

SCSI

BUS

TRANSCEIVER

SCSI

BUS

TRANSCEIVER

DS2114

TERMPWR1

TERMPWR2

VREF1

VREF2

GND

R1

R2

R9

DS2114

R8

TERMPWR1

TERMPWR2

VREF1

VREF2

GND

R1

R9

SCSI

CABLE

C1

+

C1

+

+

C2

NOTES:

1. C1 = 4.7

µF tantalum

C2 = 2.2

µF tantalum or 4.7 µF aluminum

2. If the DS2114 is to be embedded into a peripheral that will act as a target on a SCSI bus, it is recommended that

TERMPWR be derived from the SCSI cable, not generated locally. In this configuration, if a power failure occurs

in the peripheral, it will not affect the bus.

3. A high frequency bypass capacitor (0.1

µF recommended) can be added in parallel to C1 for applications using

fast rise/fall time drivers.