lx5111a Microsemi Corporation, lx5111a Datasheet

lx5111a

Manufacturer Part Number

lx5111a

Description

Ult Ra 9 - Channel Scsi Terminator

Manufacturer

Microsemi Corporation

Datasheet

1.LX5111A.pdf (4 pages)

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Rev. 0.1

H E

The LX5111A/5112A SCSI terminators are 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 applications. The low voltage BiCMOS

architecture employed in their design offers su-

perior 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. Each is approved for use with

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

the highest performance alternative available to-

day.

LX5111A/12A lies in their ability to insure reliable,

error-free communications even in systems which

do not adhere to recommended SCSI hardware

design guidelines, such as the use of improper

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

Another key improvement offered by the

3/99

N F I N I T E

E C E I V I N G

11861 W

O W E R

ESTERN

LX5111A/5112A

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

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. LX5111ACDPT)

N N O V A T I O N

(°C)

- 2 0 M H

I N I T Y

, G

ARDEN

Receiver

cable lengths and impedances. Frequently, this

situation is not controlled by the peripheral or host

designer and, when problems occur, they are the

first to be made aware of the problem. The

LX5111A/12A architecture is much more tolerant

of marginal system integrations.

configurable peripherals, the LX5111A/12A have

a 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.

function permits factory-floor or production-line

configurability, reducing inventory and product-

line diversity costs. Field configurability can also

be accomplished without physically removing

components which, often times results in field

returns due to mishandling.

the LX5111A/12A's architecture. Traditional ter-

mination techniques require large stabilization and

transient protection capacitors of up to 20µF in

value and size. The LX5111A/12A 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 SOIC

16-pin, Power

LX5111ACDP

LX5112ACDP

ROVE

1 Meter, AWG 28

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

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

UltraMAX

Additionally, the disable

U L T R A 9 - C

LX5268

PWP

Driver

LX5111ACPWP

LX5112ACPWP

R E L I M I N A R Y

Plastic TSSOP

24-pin, Power

R I V I N G

LX5111A/5112A

H A N N E L

AV E F O R M

N C

LX5111A/5112A

: 714-893-2570

Ultra-Fast Response For FAST-20 SCSI

Applications

35MHz Channel Bandwidth

3.0V Operation

Less Than 3pF Output Capacitance

Thermally Self-Limiting

NO External Compensation Capacitors

Implements 8-bit Or 16-bit ( Wide )

Applications

Compatible with Active Negation

Drivers

Compatible With Passive And Active

Terminations

Approved For Use With SCSI 1, 2, 3

And Ultra SCSI

Hot-Swap Compatible

Pin-For-Pin Compatible With

LX5211 and UC5606 (LX5111)

Pin-For-Pin Compatible With

LX5212 And UC5603/5613/5614

(LX5112)

S C S I T

- 2 0 M H

K E Y F E A T U R E S

"Understanding The Single-

A T A

Discussion On Applying

SCSI, Request Linfinity

Application Note:

Ended SCSI Bus"

For An In-Depth

LIN D

E R M I N A T O R

NOTE:

H E E T

O C

#: 51115

Related parts for lx5111a

lx5111a Summary of contents

Page 1

... A 16-pin, Power LX5111ACDP LX5111ACPWP LX5112ACDP LX5112ACPWP Note: All surface-mount packages are available in Tape & Reel. Append the letter "T" to part number. (i.e. LX5111ACDPT CA. 92841, 714-898-8121, F VENUE ARDEN ...

Page 2

... HEATSINK/GND 7 18 HEATSINK/GND 8 17 HEATSINK/GND 9 16 DISCONNECT * PWP PACKAGE (Top View) * Pin 10 is DISCONNECT for the LX5112A, and DISCONNECT for the LX5111A N.C. HEATSINK/GND HEATSINK/GND V TERM N.C. N.C. HEATSINK/GND HEATSINK/GND HEATSINK/GND HEATSINK/GND N.C. V TERM T4 T3 Copyright © 1999 Rev ...

Page 3

... Symbol V TERM LX5111A V IH LX5112A LX5111A V IL LX5112A Symbol Test Conditions V Term Power = 4.75V OUT Term Power = 3.0V I All data lines = open CC All data lines = 0 ...

Page 4

... For this reason, the LX5111A/5112A have been optimized to have only 3pF of capacitance per output in the sleep state. An additional feature of the LX5111A/5112A IC's are their compatibility with active negation drivers. UltraMAX is a trademark of Linfinity Microelectronics Inc. ...

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