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ST21S07AC Datasheet

  • ST21S07AC

  • SCSI TERMINATOR

  • STMicroelectronics   STMicroelectronics

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ST21S07A
SCSI TERMINATOR
s
s
s
s
s
s
s
s
s
s
FULLY COMPLIANT WITH SCSI, SCSI-2
AND EMERGING SCSI-E STANDARDS
PROVIDES ACTIVE TERMINATION FOR
NINE SIGNAL LINES
LOW DROPOUT (0.5V) VREGS:2.85V
FACTORY TRIMMED TERMINATION 110鈩?/div>
(鹵2%)
POWER DOWN MODE ISOLATES
TERMINATION RESISTORS FROM THE
BUS
FULLY SUPPORTS ACTIVELY NEGATED
SCSI SIGNALS
COMPATIBLE TO THE DS2107, DS2107A
AND DS21S07
ONBOARD THERMAL SHUTDOWN
CIRCUITRY
AVAILABLE IN SO-16L AND TSSOP20
SCSI BUS HOT PLUG-COMPATIBLE
SOP
TSSOP
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
ORDERING CODES
Type
ST21S07ACW
ST21S07ACWR
S21S07ACTR (*)
(*) Available on request
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 110鈩?termination resistors into a
monolithic IC. The ST21S07A can be electrically
isolatesd from the SCSI bus without physical
removal from the SCSI device.
Temperature Range
0 to 70 擄C
0 to 70 擄C
0 to 70 擄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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