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Teilenummer | DS2114 |
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Beschreibung | SCSI Terminator | |
Hersteller | Dallas Semiconducotr | |
Logo | ||
Gesamt 6 Seiten DS2114
DS2114
SCSI Terminator
FEATURES
• Fully compliant with SCSI, SCSI–2 and SCSI–3 stan-
dards
• Provides active termination for nine signal lines
• Laser–trimmed 110 ohms termination resistors have
2% tolerance
• Low dropout voltage regulator
• Fully supports actively negated SCSI signals
• Onboard thermal shutdown circuitry
• Narrow 16–pin plastic SOIC (DS2114Z)
PIN ASSIGNMENT
TERMPWR1
R1
1
2
16 NC
15 VREF2
R2 3
14 R9
R3 4
13 R8
R4 5
12 R7
R5 6
11 R6
VREF1
7
10 NC
GND
8
9 TERMPWR2
DS2114Z 16–PIN SOIC (150 MIL)
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 single–ended 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–level 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
DS2114
DS2114Z SCSI TERMINATOR 16–PIN SOIC (150 MIL)
ÎÎÎÎ
PKG
DIM
A IN.
MM
A1 IN.
MM
A2 IN.
MM
b IN.
MM
C IN
MM
D IN.
MM
e IN.
MM
E1 IN.
MM
H IN.
MM
L IN.
MM
Θ
16–PIN
MIN MAX
0.053
1.35
0.004
0.10
0.069
1.75
0.010
0.25
0.048
1.24
0.062
1.57
0.012
0.30
0.020
0.50
0.007
0.17
0.011
0.28
0.386
9.80
0.393
9.98
0.050 BSC
1.27 BSC
0.150
3.81
0.158
4.01
0.230 0.244
5.84 6.20
0.016
0.40
0°
0.050
0.89
8°
070198 6/6
6 Page | ||
Seiten | Gesamt 6 Seiten | |
PDF Download | [ DS2114 Schematic.PDF ] |
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