Datasheet > G218B

G218B

更新时间： 2022-04-23 23:00:11

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描述
Ultra160 Multi-mode LVD/SE SCSI Terminator

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G218B 数据手册

Global Mixed-mode Technology Inc.

G218B

Ultra160 Multi-mode LVD/SE SCSI Terminator

Features

General Description

Auto-selectable multi-mode Single-Ended

or LVD Termination

The G218B Multi-mode LVD/SE SCSI terminator pro-

vides a smooth transition into the next generation of

the SCSI Parallel Interface (SPI-3). It automatically

senses the bus, via DIFFSENS, and switches the ter-

mination to either single-ended (SE) or low voltage

differential (LVD) SCSI, dependent on which type of

devices are connected to the bus. If the G218B de-

tects a HVD SCSI device, it switches to a high imped-

ance state. For a 16-bit Wide SCSI bus to be opera-

tional, three G218B terminators are needed.

Meets SCSI-1, SCSI-2, SCSI-3 SPI Ultra

(Fast-20), Ultra 2(SPI-2 LVD), Ultra160 (SPI-3

LVD) standards.

Supports active negation

3pF channel capacitance

Thermal protection

Hot-Swap compatible

5% tolerance on SE and LVD termination

resistance

The Multi-mode terminator contains all functions re-

quired to terminate and auto detect and switch modes

for SCSI Parallel Interface (SPI) bus architectures. For

the SE termination, one regulator and nine precision

110ohm resistors are used. For the LVD termination,

the G218B integrates 18 regulated supplies with nine

precision resistor strings.

28 and 36 pin SSOP package

28 Pin SSOP: Pin Compatible with DS2119

36 Pin SSOP: Pin Compatible with DS2118,

LX5241 and UCC5630

Applications

Server and workstation

High-end PC

Industrial PC

Disk Array (RAID)

SCSI cable

Pin Configuration

G218B

TPWR

HVD

VREF

R1+

TPWR

R9-

LVD

R1-

R1+

R1-

R9+

R2+

R2-

R9-

R9+

R8-

R2+

R2-

NC/HS GND

R8+

R3+

R3-

NC/HS GND

HS/GND

R8+

21 R7-

HS/GND

R4+

R7+

HS/GND

R7-

HS/GND

R3+

R4-

R5+

19 R6-

R6+

R3-

DIFFB

R5-

R4+ 13

R7+

16 DIFFSENSE

15 M/S

DISCNCT

R4-

R6-

GND

R5+

R6+

21 DIFFB

R5-

DISCNCT

GND

SSOP-28/TSSOP-28

DIFFSENSE

M/S

SSOP-36

Ver 1.4

Apr 07, 2005

TEL: 886-3-5788833

http://www.gmt.com.tw

12 3 4 5 6 7...11

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