UCC5618

更新时间： 2024-11-19 22:49:27

品牌	Logo	应用领域
德州仪器 - TI		/
页数	文件大小	规格书
5页	237K
描述
18-Line SCSI Terminator

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UCC5618 数据手册

UCC5618

18-Line SCSI Terminator

FEATURES

DESCRIPTION

• Complies with SCSI, SCSI-2, SCSI-3, The UCC5618 provides 18 lines of active termination for a SCSI (Small

SPI and FAST-20 Standards

Computers Systems Interface) parallel bus. The SCSI standard recom-

mends and Fast-20 (Ultra) requires active termination at both ends of the

cable.

• 2pF Channel Capacitance During

Disconnect

Pin for pin compatible with the UC5601 and UC5608, the UCC5618 is ideal

for high performance 5V SCSI systems, Termpwr 4.0-5.25V. During discon-

nect the supply current is only 50µA typical, which makes the IC attractive

for lower powered systems.

• 50µA Supply Current in Disconnect

Mode

• 110Ω Termination

• SCSI Hot Plugging Compliant, 10nA

Typical

The UCC5618 is designed with a low channel capacitance of 2pF, which

eliminates effects on signal integrity from disconnected terminators at in-

terim points on the bus.

• +400mA Sinking Current for Active

Negation

The power amplifier output stage allows the UCC5618 to source full termi-

nation current and sink active negation current when all termination lines

are actively negated.

• –650mA Sourcing Current for

Termination

The UCC5618, as with all Unitrode terminators, is completely hot pluggable

and appears as high impedance at the terminating channels with

TRMPWR=0V or open.

• Trimmed Impedance to 5%

• Thermal Shutdown

• Current Limit

Internal circuit trimming is utilized, first to trim the 110Ω impedance, and

then most importantly, to trim the output current as close to the max

SCSI-3 spec as possible, which maximizes noise margin in fast SCSI op-

eration.

This device is offered in low thermal resistance versions of the industry

standard 28 pin wide body SOIC, TSSOP and PLCC.

BLOCK DIAGRAM

UDG-96005-1

Patented Circuit Design

6/98

12 3 4 5

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UCC5618 替代型号

型号	品牌	替代类型	描述	数据表
UCC5610	TI	功能相似	18-Line 3-5 Volt Low Capacitance SCSI Active Terminator

与UCC5618相关器件

型号	品牌	获取价格	描述	数据表
UCC5618DWP	TI	获取价格	18-Line SCSI Terminator
UCC5618DWPG4	TI	获取价格	18-Line SCSI Terminator
UCC5618DWPTR	TI	获取价格	18-Line SCSI Terminator
UCC5618DWPTRG4	TI	获取价格	18-Line SCSI Terminator
UCC5618N	ETC	获取价格	Terminator
UCC5618PWP	TI	获取价格	18-Line SCSI Terminator
UCC5618PWPG4	TI	获取价格	18-Line SCSI Terminator
UCC5618PWPTR	TI	获取价格	18-Line SCSI Terminator
UCC5618PWPTRG4	TI	获取价格	18-Line SCSI Terminator
UCC5618QP	TI	获取价格	18-Line SCSI Terminator