PRN102 [CALMIRCO]
DUAL THEVENIN TERMINATION NETWORK; 双戴维南终端网络
| 型号： | PRN102 |
| 厂家： | 
CALIFORNIA MICRO DEVICES CORP |
| 描述： | DUAL THEVENIN TERMINATION NETWORK |
| 文件： | 总2页 (文件大小：46K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
CALIFORNIA MICRO DEVICES
PRN102/112
DUALTHÉVENINTERMINATION NETWORK
Features
Applications
• Stable resistor network
• SCSI termination
• 18 terminating lines/package
• Thévenin termination
• Saves board space and reduces assembly cost
Product Description
Why thin film resistor networks? A terminating resistor is
used to reduce or eliminate unwanted reflections on a
transmission line. It can perform this function only when
its resistance value matches the characteristic imped-
ance of the transmission line. The resistors used for
terminating the transmission lines should be noiseless,
stable and functional at high frequencies. Unlike thin
film-based resistor networks, conventional thick film
resistors used for terminating transmission lines are not
stable over temperature and time and impose system
performance limitations at very high frequencies.
Peripheral devices like disk drives, printers, and CD
ROMs are connected to host through a special bus
called SCSI (Small Computer System Interface). The fast
edge rated signals that are transmitted through the SCSI
cable generate ringing on the bus. This will slow down
communication between host and peripherals. The SCSI
standard recommends proper resistor (Thévenin)
termination at host and peripheral locations to eliminate
transmission line effects.
CAMDs PRN102/112 Dual Thévenin Termination
Networks offer high integration and performance in a
miniature QSOP or SOIC package, which saves critical
board area and provides manufacturing cost and
reliability efficiencies.
SCHEMATIC CONFIGURATION
19 18 17 16 15 14 13 12
20
11
1
2
3
4
5
6
7
8
9
10
STANDARD VALUES
STANDARD SPECIFICATIONS
TCR
250ppm
R1 (Ω)
R2 (Ω)
Code
220
330
221/331
Operating Temperature Range
Power Rating/Resistor
Storage Temperature
0°C to 70°C
100mW
–65°C to +150°C
1W, max.
NON-STANDARD VALUES
Package Power Rating
Resistance Range
R1
170Ω to 660Ω
Resistance Range
R2
110Ω to 440Ω
NON-STANDARD SPECIFICATIONS
Absolute Tolerance (R)
2%
1%
© 2000 California Micro Devices Corp. All rights reserved.
C1120600
7/14/2000 215 Topaz Street, Milpitas, California 95035
Tel: (408) 263-3214
Fax: (408) 263-7846
www.calmicro.com
1
PRN102/112
CALIFORNIA MICRO DEVICES
STANDARD PART ORDERING INFORMATION
Ordering Part Number
Package
R Code
221/331
221/331
Package
Style
Pins
20
Tubes
Tape & Reel
Part Marking
SOIC
PRN10220W221/331G/T
PRN112 221/331G/T
PRN10220W221/331G/R
PRN112 221/331G/R
PRN10220W221/331G
PRN112 221/331G
20
QSOP
NON-STANDARD PART ORDERING INFORMATION
PRN102 (Example)
XXX/XXX
T
Part Series
Value Code
R1 Code/R2 Code
Tolerance
J = 5%
G = 2%
F = 1%
PRN102W-SOIC Wide
PRN112-QSOP
California Micro Devices can develop a fully customized solution which embodies the configuration shown in this data
sheet or modified to suit specific application requirements. Very precise TCR, TCR tracking and resistor tolerances,
and resistor-to-resistor ratio matching can also be provided. A Non-Recurring Engineering (NRE) charge will apply for
all fully customized requirements and a minimum order/lot will be required.
Please direct your detailed circuit configuration and specification requirements to your local CAMD representative or
to the factory for a quotation.
©2000 California Micro Devices Corp. All rights reserved.
215 Topaz Street, Milpitas, California 95035
Tel: (408) 263-3214
Fax: (408) 263-7846
www.calmicro.com 7/14/2000
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