lx5218 Microsemi Corporation, lx5218 Datasheet

lx5218

Manufacturer Part Number

lx5218

Description

9-channel Plug And Play Scs I Terminator

Manufacturer

Microsemi Corporation

Datasheet

1.LX5218.pdf (12 pages)

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Rev. 1.7

H E

The LX5218 SCSI terminator is part of Linfinity's

UltraMAX family of high-performance, adaptive, non-

linear mode SCSI products, which are designed to

deliver true UltraSCSI performance in SCSI applica-

tions. The low voltage BiCMOS architecture em-

ployed in their design offers superior performance

to older linear passive and active techniques.

Linfinity's UltraMAX architecture employs high-speed

adaptive elements for each channel, thereby providing

the fastest response possible — typically 35MHz,

which is 100 times faster than the older linear regu-

lator/terminator approach used by other manufactur-

ers. Products using this older linear regulator ap-

proach have bandwidths which are dominated by the

output capacitor and which are limited to 500KHz

(see further discussion in the Functional Description

section). The UltraMAX architecture also eliminates

the output compensation capacitor typical in earlier

terminator designs. It is approved for use with SCSI-

1, -2, -3, UltraSCSI and beyond — providing the

highest performance alternative available today.

lies in its ability to insure reliable, error free com-

munications even in systems which do not adhere

to recommended SCSI hardware design guidelines,

such as the use of improper cable lengths and

IMPORTANT: For the most current data, consult LinFinity's web site: http://www.linfinity.com.

Another key improvement offered by the LX5218

12/97

N F I N I T E

E C E I V I N G

11861 W

O W E R

ESTERN

AV E F O R M

O F

D E S C R I P T I O N

Note: All surface-mount packages are available in Tape & Reel.

I N

0 to 70

VENUE

P A C K A G E O R D E R I N F O R M A T I O N

Append the letter "T" to part number. (i.e. LX5218CDWT)

LX5218

(°C)

N N O V A T I O N

- 2 0 M H

I N I T Y

, G

ARDEN

Receiver

impedances. Frequently, this situation is not con-

trolled by the peripheral or host designer and, when

problems occur, they are the first to be made aware

of the problem. The LX5218 architecture is much

more tolerant of marginal system integrations.

and Play (PnP) applications. Quiescent current is

typically less than (275µA) in disable mode, while

the output capacitance is also less than 3pF. The

obvious advantage of extended battery life for

portable systems is inherent in the product's sleep-

mode feature. Additionally, the disable function

permits

configurability, reducing inventory and product-line

diversity costs. Field configurability can also be

accomplished without physically removing compo-

nents which, often times results in field returns due

to mishandling.

the LX5218 architecture.

techniques require large stabilization and transient

protection capacitors of up to 20µF in value and

size. The LX5218 architecture does not require these

components, allowing all the cost savings associated

with inventory, board space, assembly, reliability,

and component costs.

P R O D U C T H I G H L I G H T

The LX5218 has two disconnect pins for SCSI Plug

Reduced component counts is also inherent in

LX5268

Plastic SOWB

16-pin

LX5218CDW

ROVE

1 Meter, AWG 28

I C R O E L E C T R O N I C S

factory-floor

, CA. 92841, 714-898-8121, F

UltraMAX

9 - C

LX5268

Traditional termination

H A N N E L

production-line

Driver

Plastic TSSOP

20-pin

LX5218CPW

R O D U C T I O N

R I V I N G

LX5218

L U G A N D

AV E F O R M

N C

: 714-893-2570

SCSI PLUG AND PLAY, DUAL LOW

DISCONNECT, LOGIC LOW COMMAND

DISCONNECTS ALL TERMINATION LINES

HOT SWAP COMPATIBLE

ULTRA-FAST RESPONSE FOR FAST-20

SCSI APPLICATIONS

35MHz CHANNEL BANDWIDTH

3.5V OPERATION

LESS THAN 3pF OUTPUT CAPACITANCE

DISABLE-MODE CURRENT LESS THAN

275µA

THERMALLY SELF LIMITING

NO EXTERNAL COMPENSATION

CAPACITORS

IMPLEMENTS 8-BIT OR 16-BIT ( WIDE )

APPLICATIONS

COMPATIBLE WITH ACTIVE NEGATION

DRIVERS (60mA / CHANNEL)

COMPATIBLE WITH PASSIVE AND

ACTIVE TERMINATIONS

APPROVED FOR USE WITH SCSI-1, -2, -3

AND ULTRASCSI

CONSULT FACTORY FOR APPLICATION

TEST REPORT

L A Y

- 2 0 M H

Discussion On Applying

Single-Ended SCSI Bus"

K E Y F E A T U R E S

SCSI, Request Linfinity

A T A

"Understanding The

Application Note:

S C S I T

For An In-Depth

L I N D

NOTE:

LX5218

H E E T

E R M I N A T O R

O C

# : 5218

Related parts for lx5218

lx5218 Summary of contents

Page 1

... The LX5218 architecture is much more tolerant of marginal system integrations. The LX5218 has two disconnect pins for SCSI Plug and Play (PnP) applications. Quiescent current is typically less than (275µA) in disable mode, while the output capacitance is also less than 3pF ...

Page 2

... LX5218 Continuous Termination Voltage .......................................................................... 10V Continuous Output Voltage Range .............................................................. 0 to 5.5V Continuous Disable Voltage Range ............................................................. 0 to 5.5V Operating Junction Temperature ........................................................... 0°C to 125°C Storage Temperature Range ............................................................. -65° ...

Page 3

... OUT OUT SINK OUT LX5218 (Note 2) Recommended Operating Conditions Min. Typ. Max. 3.5 5 TERM 0 0.8 0 125 LX5218 Min. Typ. Max. 2.65 2.85 6 215 225 275 -21 -23 - Units °C Units V 9 ...

Page 4

... Open Enabled LX5218 has been optimized to have only 3pF of capacitance per output in the sleep state. An additional feature of the LX5218 is its compatibility with active negation drivers. The device handles up to 60mA of sink current for drivers which exceed the 2.85V output high. UltraMAX ...

Page 5

... OUTPUT CURRENT vs. OUTPUT HIGH VOLTAGE (V 9. TERMINATION VOLTAGE vs. SUPPLY CURRENT 10. TERMPWR SUPPLY CURRENT vs. TERMINATION VOLTAGE (Disabled) — LX5218 11. OUTPUT HIGH VOLTAGE vs. JUNCTION TEMPERATURE (V 12. OUTPUT CURRENT vs. JUCTION TEMPERATURE (V 13. OUTPUT HIGH VOLTAGE vs. TERMINATION VOLTAGE 14. OUTPUT CURRENT vs. TERMINATION VOLTAGE 15. OUTPUT CURRENT MATCHING CHANNEL TO CHANNEL Copyright © ...

Page 6

... FIGURE 1B. — 3.5 3 2.5 2 1.5 1 0.5 GND -0.5 END-DRIVEN CABLE Receiver Fig Meter 75C08 75C08 UltraMAX DRIVING WAVEFORM freq.=1.00266MHz Time - (250ns/Div.) Driver Fig. 1B LX5218 Copyright © 1997 Rev. 1.7 12/97 ...

Page 7

... FIGURE 2B. — 3.5 3 2.5 2 1.5 1 0.5 GND -0.5 END-DRIVEN CABLE Receiver Fig Meter 75C08 75C08 LX5218 DRIVING WAVEFORM freq.=4.9961MHz Time - (50ns/Div.) Driver Fig. 2B LX5218 7 ...

Page 8

Page 9

... FIGURE 6. — 100 125 FIGURE 8. — 4.75V 25° 2.4 2.8 3.2 LX5218 OUTPUT CURRENT vs. JUNCTION TEMP 4.75V 100 (T ) Junction Temperature - (°C) J OUTPUT CURRENT vs. OUTPUT HIGH VOLTAGE 25° 0.4 0.8 1.2 1 ...

Page 10

... FIGURE 12. — 100 125 UltraMAX LX5218 TERMPWR SUPPLY CURRENT vs. TERMINATION VOLTAGE (Disabled Termination Voltage - (V) TERM OUTPUT CURRENT vs. JUNCTION TEMP 3. 100 (T ) Junction Temperature - (°C) ...

Page 11

... FIGURE 14. — 5.5 6 LX5218 OUTPUT CURRENT vs. TERMINATION VOLTAGE 4 Termination Voltage - (V) TERM 6 11 ...

Page 12

... DISC1 DISC2 Note: Add third LX5218 for 16-bit SCSI PRODUCTION DATA - Information contained in this document is proprietary to Linfinity, and is current as of publication date. This document may not be modified in any way without the express written consent of Linfinity. Product processing does not necessarily include testing of all parameters ...

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