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Mulimedia ICs

SCSI active terminator

BH9595FP-Y / BH9596FP-Y

These SCSI active terminators, developed as a substitute for conventional discrete terminators, maintain good con-

sistency between VM level (2.85V) and GND level (0V) and between VM level and VDD level, and have extremely

low power consumption, dropping to a maximum of 90 milliwatts at standby (compared to the maximum of 990 milli-

watts used by conventional resistance terminators). These SCSI active terminators electrically control SCSI lines,

connecting and disengaging the terminating resistor by electrically controlling the enable pin. (The enable pin is

enabled at the HIGH level and switched to the High-Z state by the LOW level in the BH9595 and by the HIGH level in

the BH9596, completely disconnecting the SCSI line from the SCSI terminator.)

These SCSI active terminators allow for the configuration of flexible, energy-saving SCSI networks, and are ideal for

notebook computers, hard disk drives and a wide range of other products with SCSI capabilities.

Compact disk drives, optical disk drives, CD-ROM dri-

ves, tape drives, personal computers (including laptop

computers and notebook computers), workstations,

mainframes, laser printers, plotters

1) Internal 2.85V power supply and push-pull opera-

tion, for good consistency at all signal levels.

2) Enable pin for terminator enabling and disconnect-

ing, facilitating SCSI network construction.

3) Low power consumption, ideal for energy-saving

systems.

Power consumption during standby : 90mW (com-

pared to 990mW for conventional resistor termina-

tors)Power consumption at 25% duty : 614mW

(compared to 1,360mW for convention resistor ter-

minators)Significant reductions in power consump-

tion are possible.

4) Wide operating range.

TERM power : 4.0 ~ 5.5V (Transient : 6.0V)

5) Thin, microminiature design, ideal for space-saving

applications.

Package body size : 13.6

× 5.4 × 1.9mm

6) Active termination of 18-line SCSI.

7) Internal thermal shutdown circuit.

8) Compatibility with SCSI-I and SCSI-II.