LX5225CDWP Microsemi Corporation, LX5225CDWP Datasheet
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LX5225CDWP
Manufacturer Part Number
LX5225CDWP
Description
ULTRA 18-LINE/ PLUG AND PLAY SCSI TERMINATOR
Manufacturer
Microsemi Corporation
Datasheet
1.LX5225CDWP.pdf
(4 pages)
T
Copyright © 1999
Rev. 1.0
H E
The LX5225 SCSI terminator is part of Linfinity's
UltraMAX family of high-performance, adap-
tive, non-linear mode SCSI products, which are
designed to deliver true UltraSCSI performance
in SCSI applications. The low voltage BiCMOS
architecture employed in its design offers su-
perior performance to older linear passive and
active techniques.
high-speed adaptive elements for each chan-
nel, thereby providing the fastest response
possible — typically 35MHz, which is 100 times
faster than the older linear regulator/terminator
approach used by other manufacturers. Prod-
ucts using this older linear regulator approach
have bandwidths which are dominated by the
output capacitor and which are limited to
500KHz (see further discussion in the Func-
tional Description section).
architecture also eliminates the output com-
pensation capacitor typical in earlier terminator
designs. Each is approved for use with SCSI-
1, -2, -3, UltraSCSI and beyond — providing
the highest performance alternative available
today.
erant of marginal system integrations. A key
NOTE: For current data & package dimensions, visit our web site: http://www.linfinity.com.
5/99
I
Linfinity's UltraMAX architecture employs
The LX5225 architecture is much more tol-
N F I N I T E
R
E C E I V I N G
11861 W
P
O W E R
DISC 2
DISC 1
ESTERN
The UltraMAX
W
AV E F O R M
D E S C R I P T I O N
O F
L
A
I N
Note: All surface-mount packages are available in Tape & Reel.
VENUE
Append the letter "T" to part number. (i.e. LX5225CDWPT)
I
LX5225
F
N N O V A T I O N
PnP
I N I T Y
- 2 0 M H
, G
improvement offered by the LX5225 lies in its
ability to ensure reliable, error-free communi-
cations even in systems which do not adhere
to recommended SCSI hardware design guide-
lines, such as the use of improper cable lengths
and impedances. Frequently, this situation is
not controlled by the peripheral or host de-
signer and, when problems occur, they are the
first to be made aware of the problem.
nect pins must be driven low thereby discon-
necting the LX5225 from the SCSI bus. The
LX5225 has two disconnect pins for SCSI Plug
and Play (PnP) applications. Quiescent current
is less than 150µA in this mode.
in the LX5225 architecture. Traditional termi-
nation techniques require large stabilization
and transient protection capacitors of up to
20µF in value and size. The LX5225 architec-
ture does not require these components, al-
lowing all the cost savings associated with
inventory, board space, assembly, reliability,
and component costs.
ment for the LX5205 and the UCC5607.
ARDEN
Receiver
PA C K A G E O R D E R I N F O
To enter the disconnect mode, the discon-
Reduced component counts is also inherent
The LX5225 is a superior pin-for-pin replace-
P R O D U C T H I G H L I G H T
0 to 70
T
A
(°C)
Z
LX5268
M
G
ROVE
1 Meter, AWG 28
I C R O E L E C T R O N I C S
, CA. 92841, 714-898-8121, F
DWP
LX5225CDWP
UltraMAX
Plastic SOWB
28-pin, Power
U
LT R A
LX5268
P
18-L
Driver
R O D U C T I O N
D
R I V I N G
I N E
LX5225
PnP
, P
TM
W
I
L U G A N D
N C
AV E F O R M
AX
: 714-893-2570
.
SCSI Plug And Play, Dual Low Disconnect,
Logic Low Command Disconnects All
Termination Lines
Ultra-Fast Response For Fast-20 SCSI
Applications
35MHz Channel Bandwidth
Sleep-Mode Current Less Than 150µA
NO External Compensation Capacitors
Compatible With Active Negation Drivers
Compatible With Passive And Active
Terminations
Approved For Use With SCSI 1, 2, 3 And
Ultra SCSI
Hot Swap Compatible
Pin-For-Pin Compatible With LX5205 And
UC5607
DISC 1
DISC 2
D
P
K E Y F E A T U R E S
- 2 0 M H
Discussion On Applying
L AY
Single-Ended SCSI Bus"
A T A
SCSI, Request Linfinity
"Understanding The
Application Note:
For An In-Depth
SCSI T
LIN D
Z
S
NOTE:
LX5225
H E E T
E R M I N AT O R
O C
#: 5225
1
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