LX5121CDB Microsemi Corporation, LX5121CDB Datasheet

LX5121CDB

Manufacturer Part Number

LX5121CDB

Description

ULTRA 27-LINE/ PLUG AND PLAY SCSI TERMINATOR

Manufacturer

Microsemi Corporation

Datasheet

1.LX5121CDB.pdf (4 pages)

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Rev. 1.0

H E

The LX5121 Plug and Play UltraMAX

nator represents next-generation technology

for SCSI termination applications. The low-

voltage BiCMOS architecture employed in its

design offers superior performance to older

passive and active techniques.

adaptive elements for each channel, providing

the fastest response possible. The channel

bandwidth is typically 35MHz. The LX5121

compares favorably to older linear regulator

approaches whose bandwidth's are domi-

nated by the output compensation capacitor

and are limited to the 500KHz bandwidth

region (see further discussion in the Functional

Description section). Linfinity's architecture

also eliminates the output compensation

capacitor typical in earlier terminator designs.

Each is approved for use with SCSI-1,-2,-3,

ULTRA and beyond — providing the highest

performance alternative available today.

ucts lies in their ability to ensure reliable, error-

free communications even in systems which

do not necessarily adhere to recommended

SCSI hardware design guidelines, such as the

use of improper cable lengths and imped-

NOTE: For current data & package dimensions, visit our web site: http://www.linfinity.com.

Linfinity's architecture employs high-speed

Another key improvement of LX5121 prod-

5/99

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

VENUE

termi-

Append the letter "T" to part number. (i.e. LX5121CDBT)

LX5121

N N O V A T I O N

- 2 0 M H

I N I T Y

, G

ARDEN

PA C K A G E O R D E R I N F O

ances. 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 these problems.

LX5121 architecture is much more tolerant of

marginal system integrations.

configurable peripherals, the LX5121 has a

TTL compatible sleep/disable mode. Typi-

cally, quiescent current is less than 150µA in

this mode.

in the LX5121 architecture. Traditional ter-

mination techniques require large stabiliza-

tion and transient protection capacitors of up

to 20µF in value and size.

architecture does not require these compo-

nents, allowing all the cost savings associated

with inventory, board space, assembly, reli-

ability, and component costs.

Plug and Play SCSI capability for Host Bus

Adapters with 3 SCSI connectors. It also splits

the upper 9 termination lines for mixing 16-

bit (wide) and 8-bit (narrow) buses with

minimal board trace capacitance.

Receiver

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

0 to 125

Recognizing the needs of portable and

Reduced component count is also inherent

The LX5121 has multiple disables for full

Note: Available in Tape & Reel.

(°C)

LX5268

ROVE

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

1 Meter, AWG 28

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

Plastic SSOP

44-pin

UltraMAX

LX5121CDB

ULTRA 27-L

LX5268

Driver

R O D U C T I O N

The LX5121

R I V I N G

LX5121

I N E

The

, P

AV E F O R M

N C

L U G A N D

: 714-893-2570

Ultra-Fast Response For Fast-20 SCSI

Applications

Plug And Play SCSI For Host Bus

Adapters With 3 SCSI Connectors

Split Disconnect For Mixing 16-Bit

(Wide) Or 8-Bit (Narrow) Buses

35mhz Channel Bandwidth

Sleep-Mode Current Less Than 150µA

Hot-Swap Compatible

NO External Compensation Capacitors

Compatible With Active Negation

Drivers

Superior Pin-for-Pin Replacement For

The UCC5621

- 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

LAY

"Understanding The

Application Note:

For An In-Depth

SCSI T

LIN D

NOTE:

LX5121

H E E T

ERMINATOR

O C

#: 5121

Related parts for LX5121CDB

LX5121CDB Summary of contents

Page 1

... Plastic SSOP T (° 44-pin 0 to 125 LX5121CDB Note: Available in Tape & Reel. Append the letter "T" to part number. (i.e. LX5121CDBT CA. 92841, 714-898-8121, F VENUE ARDEN ...

Page 2

LX5121 ULTRA 27 ...

Page 3

UltraMAX ULTRA 27-L TERM POWER DISC1 DISC2 1.4V Cable transmission theory suggests ...

Page 4

LX5121 ULTRA 27-L For Plug and Play SCSI auto-termination diabling, connect pin 50 of the External ...

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