UCC5631A

更新时间： 2024-11-08 12:47:15

品牌	Logo	应用领域
德州仪器 - TI		/
页数	文件大小	规格书
6页	65K
描述
Multimode SCSI 9 Line Terminator

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中文翻译

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数据手册

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UCC5631A 数据手册

UCC5631A

Multimode SCSI 9 Line Terminator

FEATURES

DESCRIPTION

• Auto Selection Single Ended (SE) or

Low Voltage Differential (LVD)

Termination

The UCC5631A Multimode SCSI Terminator provides a smooth transition

into the next generation of the SCSI Parallel Interface (SPI-2). It automati-

cally senses the bus, via DIFFB, and switches the termination to either sin-

gle ended (SE) or low voltage differential (LVD) SCSI, dependent on which

type of devices are connected to the bus. The UCC5631A can not be used

on a HVD, EIA485, differential SCSI bus. If the UCC5631A detects a HVD

SCSI device, it switches to a high impedance state.

• Meets SCSI-1, SCSI-2, SCSI-3, SPI,

Ultra (Fast-20), Ultra2 (SPI-2 LVD)

and Ultra3 Standards

• 2.7V to 5.25V Operation

• Differential Failsafe Bias

The Multimode terminator contains all functions required to terminate and

auto detect and switch modes for SPI-2 bus architectures. Single Ended

and Differential impedances and currents are trimmed for maximum effec-

tiveness. Fail Safe biasing is provided to insure signal integrity. Device/Bus

type detection circuitry is integrated into the terminator to provide automatic

switching of termination between single ended and LVD SCSI and a high

impedance for HVD SCSI. The multimode function provides all the perfor-

mance analog functions necessary to implement SPI-2 termination in a sin-

gle monolithic device.

• Thermal packaging for low junction

temperature and better MTBF

• Master/Slave Input

• Supports Active Negation

• 3pF Channel Capacitance

• Reversed Disconnect Polarity

The UCC5631A is offered in a 36 pin SSOP package, as well as a 48 pin

LQFP package for a temperature range of 0°C to 70°C.

BLOCK DIAGRAM

HIPD LVD

35 34

(NOISE LOAD)

REF 1.3V

HIPD

2.15V

1.3V

20 DIFSENS

DIFFB 21

LVD

–15mA ≤ I

≤ –5mA

SOURCE

0.6V

50µA ≤ I

≤ 200µA

SINK

MSTR/SLV

110

124

SOURCE/SINK REGULATOR

SE REF 2.7V

56mV

52.5

–

L1–

L1+

LVD REF 1.25V

56mV

–

ALL

SWITCHES

MODE

SE GND SWITCH

LVD

110

124

10µA

DOWN

OPEN

HIPD

56mV

52.5

ENABLE

SWITCHES

–

DISCNCT

32 L9–

31 L9+

56mV

–

TRMPWR 36

SE GND SWITCH

PATENTED CIRCUIT DESIGN

GND

REG

HS/GND

UDG-99165

Note: Indicated pinout is for 36 pin SSOP package.

SLUS443 - OCTOBER 1999

12 3 4 5 6

中文翻译

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与UCC5631A相关器件

型号	品牌	获取价格	描述	数据表
UCC5631A_09	TI	获取价格	Multimode SCSI 9 Line Terminator
UCC5631AFQP	ETC	获取价格	TERMINATOR\|QFP\|48PIN\|PLASTIC
UCC5631AFQPTR	TI	获取价格	IC 9-LINE 105 ohm SCSI BUS TERMINATOR, PQFP48, GREEN, LQFP-48, Bus Terminator
UCC5631AMWP	TI	获取价格	Multimode SCSI 9 Line Terminator
UCC5631AMWPG4	TI	获取价格	IC 9-LINE 105 ohm SCSI BUS TERMINATOR, PDSO36, GREEN, SSOP-36, Bus Terminator
UCC5631AMWPTR	TI	获取价格	9-LINE 105ohm SCSI BUS TERMINATOR, PDSO36, GREEN, SSOP-36
UCC5638	TI	获取价格	Multimode SCSI 15 Line Terminator
UCC5638_06	TI	获取价格	Multimode SCSI 15 Line Terminator
UCC5638FQP	ROCHESTER	获取价格	15-LINE 105ohm SCSI BUS TERMINATOR, PQFP48, GREEN, PLASTIC, LQFP-48
UCC5638FQP	TI	获取价格	Multimode SCSI 15 Line Terminator

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