LX5218CPW MICROSEMI [Microsemi Corporation], LX5218CPW Datasheet

LX5218CPW

Manufacturer Part Number

LX5218CPW

Description

9-CHANNEL PLUG AND PLAY SCS I TERMINATOR

Manufacturer

MICROSEMI [Microsemi Corporation]

Datasheet

1.LX5218CPW.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 LX5218CPW

LX5218CPW Summary of contents

Page 1

... Plastic SOWB Plastic TSSOP T (° 16-pin 20-pin LX5218CDW LX5218CPW Append the letter "T" to part number. (i.e. LX5218CDWT CA. 92841, 714-898-8121, F VENUE ARDEN ...

Page 2

LX5218 ...

Page 3

UltraMAX ...

Page 4

LX5218 TERM POWER THERMAL LIMITING CIRCUIT DISC1 DISC2 Cable transmission theory suggests to ...

Page 5

UltraMAX GRAPH / CURVE INDEX Waveforms FIGURE # 1A. RECEIVING WAVEFORM (Freq. = ...

Page 6

LX5218 RECEIVING WAVEFORM FIGURE 1A. — 3.5 freq.=1.03844MHz 3 2.5 2 1.5 1 ...

Page 7

UltraMAX RECEIVING WAVEFORM FIGURE 2A. — 3.5 freq.=5.0092MHz 3 2.5 2 1.5 1 ...

Page 8

LX5218 10MHz WAVEFORM FIGURE 3. — 4 Ch2 Freq.=10.096MHz ...

Page 9

UltraMAX OUTPUT HIGH VOLTAGE vs. JUNCTION TEMP. FIGURE 5. — 4.5 4 3.5 ...

Page 10

LX5218 TERMPWR SUPPLY CURRENT FIGURE 9. — vs. TERMINATION VOLTAGE ...

Page 11

UltraMAX OUTPUT HIGH VOLTAGE FIGURE 13. — vs. TERMINATION VOLTAGE 4 3.5 3 ...

Page 12

LX5218 FIGURE 15. — 24 23.5 23 22 ...

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