S21S07ACTR 데이터 시트보기 (PDF) - STMicroelectronics

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S21S07ACTR

SCSI TERMINATOR

STMicroelectronics 

ST21S07A

SCSI TERMINATOR

s FULLY COMPLIANT WITH SCSI, SCSI-2

AND EMERGING SCSI-E STANDARDS

s PROVIDES ACTIVE TERMINATION FOR

NINE SIGNAL LINES

s LOW DROPOUT (0.5V) VREGS:2.85V

s FACTORY TRIMMED TERMINATION 110Ω

(±2%)

s POWER DOWN MODE ISOLATES

TERMINATION RESISTORS FROM THE

BUS

s FULLY SUPPORTS ACTIVELY NEGATED

SCSI SIGNALS

s COMPATIBLE TO THE DS2107, DS2107A

AND DS21S07

s ONBOARD THERMAL SHUTDOWN

CIRCUITRY

s AVAILABLE IN SO-16L AND TSSOP20

s SCSI BUS HOT PLUG-COMPATIBLE

DESCRIPTION

The SCSI-2 and SCSI-3 standards recommend

the use of active terminations at both ends of

every cable segment in a SCSI system with a

single-ended drivers and reveivers. The

ST21S07A SCSI terminator, which is fully

SOP

TSSOP

compliant with these standands, enables the

designer to gain the benefits of active termination:

greater immunity to voltages drop on the

TERMPWR (TERMination PoWeR) line,

enhanced high level noise immunity, intrinsic

TERMPWR decouplig, and very low quiescent

current consumption.

The ST21S07A integrates a regulator and nine

precise switched 110Ω termination resistors into a

monolithic IC. The ST21S07A can be electrically

isolatesd from the SCSI bus without physical

removal from the SCSI device.

ORDERING CODES

Type

ST21S07ACW

ST21S07ACWR

S21S07ACTR (*)

(*) Available on request

Temperature Range

0 to 70 °C

0 to 70 °C

0 to 70 °C

Package

SO-16L (Tube)

SO-16L (Tape & Reel)

TSSOP20 (Tape & Reel)

Comments

49parts per tube / 25tube per box

1000 parts per reel

2500 parts per reel

February 2001

1/10

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