LX5248 Ver la hoja de datos (PDF) - Microsemi Corporation
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LX5248 Datasheet PDF : 6 Pages
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PRODUCT DATABOOK 1996/1997
LX5248/LX5249
9-LINE LVD SCSI TERMINATOR
PRELIMINARY 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 .............................................................................................. +6.5V
Signal Line Voltage ................................................................................... 0V to 6.5V
Differential Voltage ................................................................................... 0V to 6.5V
Operating Junction Temperature
Plastic (PW Package) ................................................................................... 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.
THERMAL DATA
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 θJA numbers are guidelines for the thermal performance of the device/pc-board
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.
DIFFSENSE / POWER UP / POWER DOWN FUNCTION TABLE
LX5248/LX5249
DISCONNECT
DIFFSENSE
Outputs
Status
Type
Quiescent
Current
L
L < 0.5V Disable
HiZ
2mA
L
0.7V to 1.9V Enable
LVD
21mA
L
H > 2.4V Disable
HiZ
2mA
H
X
Disable
HiZ
10µA
Open
X
Disable
HiZ
10µA
PACKAGE PIN OUTS
N.C.
1
N.C.
2
N.C.
3
1+
4
1-
5
2+
6
2-
7
HEATSINK/GND
8
HEATSINK/GND
9
HEATSINK/GND
10/
3+
11/
3-
12/
4+
13/
4-
14/
5+
15/
5-
16/
DISCONNECT
17/
GND
18/
36
VTERM
35
HVD
34
LVD
33
SE
32
9-
31
9+
30
8-
29
8+
28
HEATSINK/GND
27
HEATSINK/GND
26
HEATSINK/GND
25
7-
24
7+
23
6-
22
6+
21
DIFF B
20
DIFFSENSE
19
MASTER/SLAVE
LX5249C ("N.C." = No Internal Connection)
DB PACKAGE (Top View)
1+
1
1-
2
2+
3
2-
4
3+
5
3-
6
4+
7
4-
8
5+
9
5-
10/
DISCONNECT
11/
GND
12/
24
VTERM
23
N.C.
22
9-
21
9+
20
8-
19
8+
18
7-
17
7+
16
6-
15
6+
14
DIFFSENSE
13
MASTER/SLAVE
LX5249CPW ("N.C." = No Internal Connection)
PW PACKAGE (Top View)
N.C.
1
1+
2
1-
3
2+
4
2-
5
N.C.
6
3+
7
3-
8
4+
9
4-
10/
5+
11/
5-
12/
DISCONNECT
13/
GND
14/
28
VTERM
27
LVD
26
9-
25
9+
24
8-
23
8+
22
N.C.
21
7-
20
7+
19
6-
18
6+
17
DIFFB
16
DIFFSENSE
15
MASTER/SLAVE
LX5248CPW ("N.C." = No Internal Connection)
PW PACKAGE (Top View)
2
Copyright © 2001
Rev. 0.6 1/01
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