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LX5240

MULTIMODE, PLUG AND PLAY SCSI TERMINATOR

Microsemi Corporation 

PRODUCT DATABOOK 1996/1997

LX5240

MULTIMODE, PLUG AND PLAY SCSI TERMINATOR

PRODUCTION DATA SHEET

UltraMAX

A B S O L U T E M A X I M U M R AT I N G S (Note 1)

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°C

Note 1. Exceeding these ratings could cause damage to the device. All voltages are with

respect to Ground. Currents are positive into, negative out of the specified

terminal.

T H E R MAL D ATA

DB PACKAGE:

THERMAL RESISTANCE-JUNCTION TO AMBIENT, θJA

PW PACKAGE:

50°C/W

THERMAL RESISTANCE-JUNCTION TO AMBIENT, θJA

100°C/W

Junction Temperature Calculation: TJ = TA + (PD x θJA).

The θ numbers are guidelines for the thermal performance of the device/pc-board

JA

system. All of the above assume no ambient airflow.

MASTER / SLAVE FUNCTION TABLE

MASTER /

SLAVE

DIFFSENSE

Status

Output

Current

L*

HI Z

H

1.3V

Open (Pull-up)

1.3V

0mA

15mA Source

15mA Source

* When in Low state, terminator will detect state of DIFFSENSE line.

PACKAGE PIN OUTS

N.C.

1

N.C.

2

DISCONNECT A

3

1+

4

1-

5

2+

6

2-

7

HEATSINK

8

HEATSINK

9

HEATSINK

10

3+

11

3-

12

4+

13

4-

14

5+

15

5-

16

DISCONNECT B

17

GND

18

36

VTERM

35

HVD

34

LVD

33

SE

32

9-

31

9+

30

8-

29

8+

28

HEATSINK

27

HEATSINK

26

HEATSINK

25

7-

24

7+

23

6-

22

6+

21

DIFF B

20

DIFFSENSE

19

MASTER/SLAVE

DB PACKAGE (Top View)

("N.C." = No Internal Connection)

1+

1

1-

2

2+

3

2-

4

3+

5

3-

6

4+

7

4-

8

5+

9

5-

10

DISCONNECT B

11

GND

12

24

VTERM

23

DISCONNECT A

22

9-

21

9+

20

8-

19

8+

18

7-

17

7+

16

6-

15

6+

14

DIFFSENSE

13

MASTER/SLAVE

PW PACKAGE (Top View)

("N.C." = No Internal Connection)

DIFFSENSE / POWER UP / POWER DOWN FUNCTION TABLE

DISCONNECT A DISCONNECT B

DIFF

SENSE

Outputs

Status

Type

H

L

L

H

L < 0.5V

Enable

S.E.

H

L

L

H

0.7 to 1.9V Enable

LVD

H

L

L

H

H > 2.4V Disable

HI Z

L

H

Open

L

H

Open

X

Disable

HI Z

Quiescent

Current

7mA

21mA

1mA

10µA

2

Copyright © 1999

Rev. 1.1 10/00

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