lx5240 Microsemi Corporation, lx5240 Datasheet

lx5240

Manufacturer Part Number

lx5240

Description

Multimode, Plug And Play Scsi Terminator

Manufacturer

Microsemi Corporation

Datasheet

1.LX5240.pdf (5 pages)

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Rev. 1.1 10/00

H E

The LX5240 is a multimode SCSI terminator with

plug-and-play capability that conforms to the

SCSI Parallel Interconnect-2 (SPI-2) specification

developed by the T10 standards committee for

low voltage differential (LVD) termination, while

providing backwards compatibility to the SCSI,

SCSI-2, and SPI single-ended specifications.

Multimode compatibility permits the use of

legacy devices on the bus without hardware

alterations.

achieved through voltage detection on the

diffsense line.

nology which delivers the ultimate in SCSI bus

performance while saving component cost and

board area. Elimination of the external capaci-

tors also mitigates the need for a lengthy ca-

pacitor selection process. The individual high

bandwidth drivers also maximize channel sepa-

ration and reduce channel to channel noise and

cross talk. The high bandwidth architecture

insures ULTRA2 performance while providing

a clear migration path to ULTRA3 and beyond.

sense (DIFFSENSE) pin supplies a voltage be-

tween 1.2V and 1.4V. In application, this pin

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

The LX5240 utilizes Linfinity’s UltraMAX tech-

When the LX5240 is enabled, the differential

N F I N I T E

Automatic mode selection is

(+)

(-)

11861 W

O W E R

U S

ESTERN

O L T A G E

O F

D E S C R I P T I O N

LX5240

I N

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

VENUE

0 to 70

Append the letter "T" to part number. (i.e. LX5240CDBT)

N N O V A T I O N

(°C)

I N I T Y

, G

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

ARDEN

is tied to the DIFFSENSE input of the corre-

sponding LVD transceivers. This action enables

the LVD transceiver function. DIFFSENSE is

capable of supplying a maximum of 15mA.

Tying the DIFFSENSE pin high places the

LX5240 in a HI Z state indicating the presence

of an HVD device. Tying the pin low places

the part in a single-ended mode while also

signaling the multimode transceiver to operate

in a single-ended mode.

functionality with the DISCONNECT A and B

pins. These logic compatible pins place the

device in operational or sleep modes. During

sleep mode, power dissipation is reduced to

a meager 15µA while also placing all outputs

in a HI Z state. Also during sleep mode, the

DIFFSENSE function is disabled and is placed

in a HI Z state.

master / slave function. Driving this pin high

or floating the pin enables the 1.3V DIFFSENSE

reference. Driving the pin low disables the on

board DIFFSENSE reference and enables use

of an external master reference device.

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

The LX5240 supports full Plug and Play

Another key feature of the LX5240 is the

LX5240CDB

Plastic SSOP

36-pin

ROVE

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

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

UltraMAX

U L T I M O D E

-100mV

100mV

R O D U C T I O N

LX5240CPW

Plastic TSSOP

24-pin

, P

L U G A N D

LX5240

N C

= V

: 714-893-2570

NEGATED

(-)

- V

O D

(+)

Auto-Selectable LVD Or

Single-Ended Termination

3.0pF Maximum Disabled Output

Capacitance

Fast Response, No External Capacitors

Required

Compatible With Active Negation

Drivers

15µA Supply Current In Disconnect

Mode

Logic Command Disconnects All

Termination Lines

Diffsense Line Driver

Ground Driver Integrated For Single-

Ended Operation

Current Limit And Thermal Protection

Hot-Swap Compatible

(Single-Ended)

Compatible With SCSI 1, 2, 3, Fast-20,

And The Pending SPI-2 LVD

Plug And Play Compatible

See LX5245/5246, LVD Termination Only

, Logic = 0

L A Y

K E Y F E A T U R E S

A T A

S C S I T

LIN D

LX5240

H E E T

E R M I N A T O R

O C

#: 5240

Related parts for lx5240

lx5240 Summary of contents

Page 1

... LVD transceiver function. DIFFSENSE is capable of supplying a maximum of 15mA. Tying the DIFFSENSE pin high places the LX5240 state indicating the presence of an HVD device. Tying the pin low places the part in a single-ended mode while also signaling the multimode transceiver to operate in a single-ended mode ...

Page 2

... LX5240 TermPwr Voltage ................................................................................................. +7V Operating Junction Temperature Plastic (DB, PW Packages) .......................................................................... 150°C Storage Temperature Range .............................................................. -65°C to 150°C Lead Temperature (Soldering, 10 seconds) .................................................... 300° ...

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lx5240 Summary of contents

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