aic-7892 ETC-unknow, aic-7892 Datasheet

aic-7892

Manufacturer Part Number

aic-7892

Description

Single Channel Ultra160 Scsi Single Chup Host Adapter

Manufacturer

ETC-unknow

Datasheet

1.AIC-7892.pdf (2 pages)

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Product Benefits

Up to 160 MByte/sec data

transfer rates

66 MHz, 64-bit, PCI interface that

supports zero wait-state memory;

also operates on 33 MHz, 32-bit

PCI busses

PC99 compliant

PCI 2.2 compliant

Supports up to 15 devices on

a standard cable configuration

up to 12 meters

Fully compatible with the

AIC-3860 LVD-to-single-ended

transceiver

AIC

Single-Channel PCI-to-Ultra160 SCSI Single-Chip

Host Adapter

Overview

The Adaptec

provides outstanding performance and flexibility

to meet tomorrow’s requirements today. Ultra160

SCSI delivers data transfer rates up to 160 MByte/sec

to address emerging bandwidth-hungry applications,

such as real-time video, data mining, Internet/

Intranet, and scientific modeling and simulation.

The AIC-7892 chip features a 66 MHz, 64-bit,

PCI interface for next-generation server, work-

station, and high-end desktop systems.

Migration to new Ultra160 SCSI technology

is easy with the AIC-7892. The chip is fully

backward compatible with Ultra2 and earlier

SCSI generations. The chip is available in a

272 Ball Grid Array (BGA) package.

Key Benefits

Increased SCSI Performance

With the AIC-7892, performance takes a giant

leap forward. Ultra160 SCSI technology doubles

Ultra2 data transfer rates – up to 160 MByte/sec.

In addition, the AIC-7892 single-chip host adapter

features a PCI bus interface that supports zero

wait-state memory from 32-bit, 33 MHz to 64-bit,

66 MHz. The 64-bit, 66-MHz interface quadruples

the bandwidth provided by a 32-bit, 33 MHz PCI

interface, from 133 MByte/sec to 533 MByte/sec,

enabling maximum system throughput.

Improved Data Integrity

The AIC-7892 fully supports Ultra160 Cyclic

Redundancy Checking (CRC). CRC detects data

integrity errors that would not be detected by

simple parity checking used by previous SCSI

generations. The higher 160 MByte/sec data rate

achieved on existing Low Voltage Differential

(LVD) cable configurations mandated this

improved data integrity feature.

AIC-7892 single-chip host adapter

™

-7892

SCSI Bus Configuration Testing

The AIC-7892 fully supports Ultra160 and

Ultra3 SCSI Domain Validation. Domain

Validation provides SCSI bus configuration

testing to help ensure Ultra160 SCSI devices

operate at optimum speed.

Long Cables

The AIC-7892 supports a maximum of 15

LVD devices on 12 meters of cable. In a

point-to-point configuration, the maximum

cable length extends to 25 meters. The

AIC-7892 is fully compatible with existing

Ultra2 SCSI supported cable configurations.

The cable-length distances provide greater

system configuration flexibility – especially

for clustering and RAID applications.

The AIC-7892 also supports High Voltage

Differential (HVD) busses when used

with external HVD transceivers.

Backward Compatibility

The AIC-7892 incorporates an advanced

multimode I/O cell that supports Ultra2,

Ultra3, and Ultra160 SCSI LVD devices,

as well as single-ended (SE) devices. With

only Ultra2 and Ultra160 devices attached, the

SCSI bus performs at full speed and

full LVD cable lengths. When SE devices

are attached, the bus defaults to SE speed

and cable length.

In mixed environments of LVD and single-

ended devices, the AIC-7892 host adapter

chip can couple with an Adaptec AIC-3860

transceiver chip to bridge the signaling

discontinuity. By dividing the SCSI bus

into independent single-ended and LVD

segments, the AIC-3860 supports legacy

devices without limiting performance or

LVD segment cable length. (see figure)

Ultra160 SCSI uses the same connectors

and cables as Ultra2 and Ultra Wide SCSI,

so upgrading system performance is easy

and cost-effective.

Related parts for aic-7892

aic-7892 Summary of contents

Page 1

... PCI interface for next-generation server, work- station, and high-end desktop systems. Migration to new Ultra160 SCSI technology is easy with the AIC-7892. The chip is fully backward compatible with Ultra2 and earlier SCSI generations. The chip is available in a 272 Ball Grid Array (BGA) package. ...

Page 2

... Adaptec, Inc., reserves the right, without notice, to make changes in product design or specification. Information is subject to change without notice. P/N 985733-011 8/99 Printed in U.S.A. AIC-7892 Motherboard PCI Bus AIC-7892 PCI-to-Ultra2 (LVD) AIC-3860 L S LVD Mode SE Mode Performance • 64-bit, 66 MHz PCI interface supports zero wait-state memory – ...

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