Bolivar Drive, P.O. Box 547, Bradford, PA 16701 USA
■
814-362-5536
■
Fax: 814-362-8883
■
www.koaspeer.com
D-10
Differential Terminator Network
RDB SERIES
Differential Terminator Network
Differential terminators are used to terminate differ-
ential-type SCSI bus lines. Data signals transmitted
at high speed and high frequencies generate reflec-
tions and a ringing effect, requiring impedance
matching along the signal path. A differential
terminator can be used to eliminate transmission
line effects with a combination of standard resistors
matching the characteristic impedance of the trans-
mission line. KOA’s silicon based thin film networks
provide exceptional stability and offer reliable
performance at high frequencies.
Features
■
Multiple terminating lines per package
■
Thin film on silicon
■
Excellent stability over time, temperature
and high frequencies
■
Cost-effective alternative to discrete components
■
Space saving surface mount network
Available Pin Configurations
n
= Number of Pins
See physical configurations on page D-11
for available pin/package configurations.
Applications
■
Differential SCSI termination
■
SCSI host adapter cards and other SCSI devices
Electrical Characteristics
Resistance Range. . . . . .
10Ωto 1MΩ
Resistance Tolerance . . .
Standard: ±5%, ±2%, ±1%
T.C.R. . . . . . . . . . . . . . .
Standard: ±100 ppm/°C
Tracking TCR . . . . . . . .
Typical: ±10 ppm/°C
Operating
Temperature Range . . . .
-55°C to +125°C
Storage
Temperature Range . . . .
-65°C to +150°C
Power Rating
@ 70°C . . . . . . . . . . . . .
100mW per resistor
Circuit Schematic
Vee
GND
Lead #1
R1
R2
R1
D
Bolivar Drive, P.O. Box 547, Bradford, PA 16701 USA
■
814-362-5536
■
Fax: 814-362-8883
■
www.koaspeer.com
D-11
RDB Series
Physical Configurations
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . Resistance
Body Style . . . . . . . . . . . . . . . . . . . . . Pin Count
Narrow SOIC . . . . . . . . . . . . . . . . 16, 20
Wide SOIC . . . . . . . . . . . . . . . . . 16, 20
QSOP . . . . . . . . . . . . . . . . . . . . . 16, 20, 24
Die Pack * . . . . . . . . . . . . . . . . . . 8, 14, 16, 20, 24
Part Marking
Mechanical Characteristics
Item. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Material
Substrate . . . . . . . . . . . . . . . . . . . . . . . Silicon
Resistor material. . . . . . . . . . . . . . . . TaN/NiCr
Passivation . . . . . . . . . . . . . . . . . . . . . . Glass
9905
RDB W20
331J/151JA
Body Style/
Pin Count
Resistance
Code
Date Code
Manufacturer's
Trademark
Pin 1 Indicator
(Molded Indent)
Model
RDB-
Differential
Terminator
Network
16-24
See
above
table
B = 13"
Embossed
Plastic Tape
& Reel, see
Packaging
Section for
details
2 significant digits
+ the number of
zeros followed
by the tolerance
J=±5%
G=±2%
F=±1%
N = Narrow
SOIC
W= Wide
SOIC
Q = QSOP
6 = 0.6 mm Die Pack
5 = 0.5 mm Die Pack
4 = 0.4 mm Die Pack
H = ±100 ppm/°C
D
* See page J-6 for Die Pack specifications.
Ordering Information
RDB W 20 H B 331J/151J
Circuit Body Number T.C.R. Packaging Resistance
Type Style of Pins Value
