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PDF LX5225 Data sheet ( Hoja de datos )
| Número de pieza | LX5225 | |
| Descripción | ULTRA 18-LINE/ PLUG AND PLAY SCSI TERMINATOR | |
| Fabricantes | Microsemi Corporation | |
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T H E I N F I N I T E P O W E R O F I N N O VAT I O N
L I N D O C #: 5225
UltraMAXTM
LX5225
ULTRA 18-LINE, PLUG AND PLAY SCSI TERMINATOR
PR O D U C T I O N D ATA S H E E T
DESCRIPTION
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.
Linfinity's UltraMAX architecture employs
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). The UltraMAX
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.
The LX5225 architecture is much more tol-
erant of marginal system integrations. A key
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.
To enter the disconnect mode, the discon-
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.
Reduced component counts is also inherent
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.
The LX5225 is a superior pin-for-pin replace-
ment for the LX5205 and the UCC5607.
NOTE: For current data & package dimensions, visit our web site: http://www.linfinity.com.
KEY FEATURES
s SCSI Plug And Play, Dual Low Disconnect,
Logic Low Command Disconnects All
Termination Lines
s Ultra-Fast Response For Fast-20 SCSI
Applications
s 35MHz Channel Bandwidth
s Sleep-Mode Current Less Than 150µA
s NO External Compensation Capacitors
s Compatible With Active Negation Drivers
s Compatible With Passive And Active
Terminations
s Approved For Use With SCSI 1, 2, 3 And
Ultra SCSI
s Hot Swap Compatible
s Pin-For-Pin Compatible With LX5205 And
UC5607
PRODUCT HIGHLIGHT
R E C E I V I N G W AV E F O R M - 2 0 M H Z
D R I V I N G W AV E F O R M - 2 0 M H Z
Copyright © 1999
Rev. 1.0 5/99
DISC 1
DISC 2
Receiver
Driver
LX5225
PnP
1 Meter, AWG 28
LX5225
PnP
LX5268
LX5268
PA C K A G E O R D E R I N F O
TA (°C)
DWP
Plastic SOWB
28-pin, Power
0 to 70
LX5225CDWP
Note: All surface-mount packages are available in Tape & Reel.
Append the letter "T" to part number. (i.e. LX5225CDWPT)
DISC 1
DISC 2
NOTE:
For An In-Depth
Discussion On Applying
SCSI, Request Linfinity
Application Note:
"Understanding The
Single-Ended SCSI Bus"
LINFINITY MICROELECTRONICS INC.
11861 WESTERN AVENUE, GARDEN GROVE, CA. 92841, 714-898-8121, FAX: 714-893-2570
1
1 page | ||
| Páginas | Total 4 Páginas | |
| PDF Descargar | [ Datasheet LX5225.PDF ] | |
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