lx5245 Microsemi Corporation, lx5245 Datasheet

lx5245

Manufacturer Part Number

lx5245

Description

9 - Line Lvd Scsi Terminato

Manufacturer

Microsemi Corporation

Datasheet

1.LX5245.pdf (7 pages)

Current page: 1 of 7
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Rev. 0.6 10/00

H E

The LX5245/5246/5247 ICs are Low Volt-

age Differential (LVD) Terminators de-

signed to comply with the LVD termination

specification in the SPI-2 document. The

LX5245/5246/5247 are designed specifically

for LVD applications. Because the LX5245/

5246/5247 support only LVD, they have lower

output capacitance than multimode termina-

tors such as the LX5240.

Linfinity’s UltraMAX Technology which

delivers the ultimate in SCSI bus performance

while saving component cost and board area.

Elimination of the external capacitors also

mitigates the need for a lengthy capacitor

selection process. The individual high band-

width drivers also maximize channel sepa-

ration and reduces channel-to-channel noise

and cross talk.

UltraMAX architecture insures ULTRA-2 per-

formance, while providing a clear migration

path to ULTRA-3 and beyond.

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

The

N F I N I T E

LX5245/5246/5247

(+)

(-)

11861 W

The high-bandwidth

O W E R

ESTERN

LX5245/46/47

O F

D E S C R I P T I O N

Utilize

I N

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

VENUE

Append the letter "T" to part number. (i.e. LX5245CPWT)

N N O V A T I O N

I N I T Y

, G

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

ARDEN

Enabled,

(DIFFSENSE) Pin Supplies A Voltage

Between 1.2V And 1.4V. In application,

the terminator DIFFSENSE output is con-

nected to the system DIFFSENSE line. If

there are no single ended or HVD devices

attached to the system the LVD output will

be enabled. If the DIFFSENSE line is LOW,

indicating a single ended device, the LX5245/

5246/5247 output will be HiZ.

DIFFSENSE line is HIGH, indicating a high

voltage differential device the LX5245/5246/

5247 output will be HiZ.

Compatible DISCONNECT Pin. The

LX5245/47 is active LOW and the LX5246

is active HIGH. During sleep mode, power

dissipation is reduced to a meager 5µA, 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.

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

0 to 70

When The LX5245/5246/5247 Are

The LX5245/5246/5247 ICs Have A TTL

(°C)

ROVE

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

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

The

UltraMAX

LX5245CPW

LX5246CPW

Plastic TSSOP

24-pin

28-PIN

Differential

-100mV

100mV

9 - L

R E L I M I N A R Y

I N E

Sense

If the

LX5245/46/47

LX5245/5246/5247

LV D S C S I T

N C

= V

: 714-893-2570

NEGATED

(-)

- V

(+)

Pin compatable with unitrode UCC5640

2.5pF Typical Disabled Output

Capacitance

Fast Response, No External Capacitors

Required

5µA Supply Current In Disconnect Mode

20mA Supply Current During Normal

Operation

Logic Command Disconnects All

Termination Lines

Diffsense Line Driver

Current Limit And Thermal Protection

Compatible With The Pending SPI-2 LVD

Specification

Mention 5249 as LVD only terminator

with pinout compatable with industry

standard multi-mode terminators

, Logic = 0

K E Y F E A T U R E S

A T A

E R M I N A T O R

H E E T

Related parts for lx5245

lx5245 Summary of contents

Page 1

... PW T (°C) A 24-pin 28-PIN LX5245CPW LX5246CPW Note: All surface-mount packages are available in Tape & Reel. Append the letter "T" to part number. (i.e. LX5245CPWT CA. 92841, 714-898-8121, F VENUE ARDEN ROVE ...

Page 2

... DISCONNECT Status H L < 0.5V Disable H 0.7V to 1.9V Enable H H > 2.4V Disable L X Disable Open X Disable UltraMAX PACKAGE PIN OUTS LX5245/46 CPW N. DIFFB DIFFSENSE GND 24L PW PACKAGE (Top View) ("N.C." Internal Connections) Outputs Quiescent Type Current HiZ 2mA ...

Page 3

... Note 2. Range over which the device is functional. (Unless otherwise specified, these specifications apply over the operating ambient temperature range of 0°C ≤ T DISCONNECT: LX5245/ LX5246 = H. Low duty cycle pulse testing techniques are used which maintains junction and case temperatures equal to the ambient temperature.) ...

Page 4

... Power ON 1.07mA Internal V REF 1.30V 2D(-) 2cm 52.5 200 LVD 1.25V 2D(+) 52.5 10mA 1.07mA HVD LATCH Window LVD Comp. SE Power ON & Mode Change Power ON Delay FIGURE 1 — LX5245 Block Diagram UltraMAX HVD LVD (-) LVD SE HVD LVD (+) LVD SE Rev. 0.6 10/00 ...

Page 5

... UltraMAX Pin Designator Description Rev. 0.6 10/ LX5245/5246/5247 ...

Page 6

... LX5245/5246/5247 ...

Page 7

... FIGURE 3 — Suggested Linfinity LX5245/5246/5247 Universal Application Schematic (Please Reference Manufacturer's Current Data Sheet To Ensure Compatibility) PRELIMINARY DATA - Information contained in this document is pre-production data, and is proprietary to LinFinity. It may not modified in any way without the express written consent of LinFinity. Product referred to herein is offered in sample form only, and Linfinity reserves the right to change or discontinue this proposed product at any time ...

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