Datasheet > UC5612J

UC5612J

更新时间： 2024-11-07 23:38:59

品牌	Logo	应用领域
其他 - ETC		接口集成电路
页数	文件大小	规格书
5页	302K
描述
Terminator

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数据手册

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UC5612J 数据手册

UC5612

9-Line Low Capacitance SCSI Active Terminator

FEATURES

DESCRIPTION

•

Complies with SCSI, SCSI-2

and SPI-2 Standards

The UC5612 provides 9 lines of active termination for a SCSI (Small Computer

Systems Interface) parallel bus. The SCSI standard recommends active termi-

nation at both ends of the cable segment.

•

5pF Channel Capacitance

during Disconnect

The only functional differences between the UC5603 and UC5612 is the ab-

sence of the negative clamps on the output lines. Parametrically, the UC5612

has a 5% tolerance on impedance and current compared to a 3% tolerance on

the UC5603. Custom power packages are utilized to allow normal operation at

full power (2 Watts).

•

Meets SCSI Hot Plugging

−400mA Sourcing Current for

Termination

The UC5612 provides a disconnect feature which, when opened or driven high,

disconnects all terminating resistors, disables the regulator and greatly reduces

standby power consumption. The output channels remain high impedance even

without Termpwr applied. A low channel capacitance of 5pF allows interim

points of the bus to have little to no effect on the signal integrity.

•

+100mA Sinking Current for

Active Negation

•

1V Dropout Voltage Regulator

Logic High Command

Disconnects all Termination

Lines

Internal circuit trimming is utilized, first to trim the impedance to a 5% tolerance,

and then most importantly, to trim the output current to a 5% tolerance, as close

to the maximum SCSI specification as possible. This maximizes the noise mar-

gin in fast SCSI operation. Other features include thermal shutdown and cur-

rent limit.

•

100µA Supply Current in

Disconnect Mode

Trimmed Termination Current

to 5%

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

ard 16 pin narrow body SOIC, 16 pin ZIP (zig-zag in line package) and 24 pin

TSSOP.

•

Trimmed Impedance to 5%

Low Thermal Resistance

Surface Mount Packages

BLOCK DIAGRAM

UDG-94133

Circuit Design Patented

3/97

12 3 4 5

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与UC5612J相关器件

型号	品牌	获取价格	描述	数据表
UC5612N	TI	获取价格	LOW VOLTAGE DIFFERENTIAL SCSI 9LINE TERMINATOR
UC5612PWP	TI	获取价格	LOW VOLTAGE DIFFERENTIAL SCSI 9LINE TERMINATOR
UC5612PWPG4	TI	获取价格	9-Line 5V SE Terminator for SCSI and Fast SCSI with Inverted Sensing 24-TSSOP 0 to 70
UC5612PWPTR	TI	获取价格	9-Line 5V SE Terminator for SCSI and Fast SCSI with Inverted Sensing 24-TSSOP 0 to 70
UC5612Z	ETC	获取价格	Terminator
UC5613	TI	获取价格	9-Line Low Capacitance SCSI Active Terminator
UC5613DP	ETC	获取价格	Terminator
UC5613DPTR	ETC	获取价格	Terminator
UC5613J	ETC	获取价格	Terminator
UC5613N	ETC	获取价格	Terminator