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DS2114 Datasheet

  • DS2114

  • SCSI Terminator

  • 6頁

  • DALLAS   DALLAS

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DS2114
DS2114
SCSI Terminator
FEATURES
PIN ASSIGNMENT
TERMPWR1
R1
R2
R3
R4
R5
VREF1
GND
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
NC
VREF2
R9
R8
R7
R6
NC
TERMPWR2
鈥?/div>
Fully compliant with SCSI, SCSI鈥? and SCSI鈥? stan-
dards
鈥?/div>
Provides active termination for nine signal lines
鈥?/div>
Laser鈥搕rimmed 110 ohms termination resistors have
2% tolerance
鈥?/div>
Low dropout voltage regulator
鈥?/div>
Fully supports actively negated SCSI signals
鈥?/div>
Onboard thermal shutdown circuitry
鈥?/div>
Narrow 16鈥損in plastic SOIC (DS2114Z)
DS2114Z 16鈥揚IN SOIC (150 MIL)
DESCRIPTION
The SCSI鈥? and SCSI鈥? standards recommend the
use of active terminations at both ends of every cable
segment in a SCSI system with single鈥揺nded drivers
and receivers. The DS2114 SCSI Terminator, which is
fully compliant with these standards, enables the de-
signer to gain the benefits of active termination: greater
immunity to voltage drops on the TERMPWR (TER-
Mination PoWeR) line, enhanced high鈥搇evel noise im-
munity, intrinsic TERMPWR decoupling, and very low
quiescent current consumption. The DS2114 integrates
a regulator and nine precise 110 ohms termination re-
sistors into a monolithic IC. The DS2114 is intended for
cable end terminator assemblies and devices where the
terminators do not need to be isolated from the SCSI
bus.
070198 1/6

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