lx5219 Microsemi Corporation, lx5219 Datasheet

lx5219

Manufacturer Part Number

lx5219

Description

Ultra Channel Scsi Terminator

Manufacturer

Microsemi Corporation

Datasheet

1.LX5219.pdf (12 pages)

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Rev. 1.8

H E

The LX5219 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 its 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 regulator/

terminator approach used by other manufacturers.

Products using this older linear regulator approach

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

impedances. Frequently, this situation is not con-

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

Another key improvement offered by the LX5219

3/98

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

I N

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

VENUE

0 to 70

LX5219

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. LX5219CDWT)

N N O V A T I O N

(°C)

- 2 0 M H

I N I T Y

, G

Receiver

ARDEN

trolled by the peripheral or host designer and, when

problems occur, they are the first to be made aware

of the problem. The LX5219 architecture is much

more tolerant of marginal system integrations.

configurable peripherals, the LX5219 has an active

low TTL compatible sleep/disable mode. Quiescent

current is typically less than (275µA) in this 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 LX5219 architecture.

techniques require large stabilization and transient

protection capacitors of up to 20µF in value and

size. The LX5219 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

Recognizing the needs of portable and

Reduced component counts is also inherent in

LX5268

Plastic SOWB

16-pin

LX5219CDW

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

LX5268

U L T R A 9 - C

Traditional termination

Driver

production-line

R O D U C T I O N

Plastic TSSOP

20-pin

LX5219CPW

R I V I N G

LX5219

H A N N E L

AV E F O R M

N C

: 714-893-2570

ULTRA-FAST RESPONSE FOR FAST-20

SCSI APPLICATIONS

HOT SWAP COMPATIBLE

35MHz CHANNEL BANDWIDTH

3.5V OPERATION

LESS THAN 3pF OUTPUT CAPACITANCE

SLEEP-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

EVALUATION BOARD AVAILABLE

S C S I T

- 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:

For An In-Depth

LIN D

NOTE:

E R M I N A T O R

LX5219

H E E T

O C

#: 5219

Related parts for lx5219

lx5219 Summary of contents

Page 1

... Plastic SOWB T (° 16-pin LX5219CDW Note: All surface-mount packages are available in Tape & Reel. Append the letter "T" to part number. (i.e. LX5219CDWT CA. 92841, 714-898-8121, F VENUE ARDEN ROVE ...

Page 2

... LX5219 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 LX5219 (Note 2) Recommended Operating Conditions Min. Typ. Max. 3.5 5 TERM 0 0.8 0 125 LX5219 Min. Typ. Max. 2.65 2.85 6 215 225 375 -21 -23 - Units °C Units V 9 ...

Page 4

... Open Enabled LX5219 has been optimized to have only 3pF of capacitance per output in the sleep state. An additional feature of the LX5219 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) — LX5219 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, 92 75C08 75C08 UltraMAX DRIVING WAVEFORM freq.=1.00266MHz Time - (250ns/Div.) Driver Fig. 1B LX5219 Copyright © 1998 Rev. 1.8 3/98 ...

Page 7

... FIGURE 2B. — 3.5 3 2.5 2 1.5 1 0.5 GND -0.5 END-DRIVEN CABLE Receiver Fig Meter, 92 75C08 75C08 LX5219 DRIVING WAVEFORM freq.=4.9961MHz Time - (50ns/Div.) Driver Fig. 2B LX5219 7 ...

Page 8

Page 9

... FIGURE 8. — 4.75V 25° 2.4 2.8 3.2 0 LX5219 OUTPUT CURRENT vs. JUNCTION TEMP 4.75V 100 (T ) Junction Temperature - (°C) J OUTPUT CURRENT vs. OUTPUT HIGH VOLTAGE 25°C A 0.4 0.8 1.2 1.6 2 2.4 2 Output High Voltage - (V) ...

Page 10

... FIGURE 12. — 100 125 UltraMAX LX5219 TERMPWR SUPPLY CURRENT vs. TERMINATION VOLTAGE (Disabled Termination Voltage - (V) TERM OUTPUT CURRENT vs. JUNCTION TEMP 3. 100 (T ) Junction Temperature - (°C) J ...

Page 11

... FIGURE 14. — 5 LX5219 OUTPUT CURRENT vs. TERMINATION VOLTAGE 3.5 4 4 Termination Voltage - (V) TERM 6 11 ...

Page 12

... TERM LX5219 Note: Add third LX5219 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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