Datasheet > PRN112

PRN112

更新时间： 2024-10-01 22:44:23

品牌	Logo	应用领域
CALMIRCO		/
页数	文件大小	规格书
2页	46K
描述
DUAL THEVENIN TERMINATION NETWORK

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PRN112 数据手册

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

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

170Ω to 660Ω

Resistance Range

110Ω to 440Ω

NON-STANDARD SPECIFICATIONS

Absolute Tolerance (R)

C1120600

7/14/2000 215 Topaz Street, Milpitas, California 95035

Tel: (408) 263-3214

Fax: (408) 263-7846

www.calmicro.com

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