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參數(shù)資料
| 型號(hào)： | ML6518 |
| 廠商： | Fairchild Semiconductor Corporation |
| 英文描述： | 18 Line Hot-Insertable Active SCSI Terminator(線熱插入有源SCSI終端器) |
| 中文描述： | 18線熱可插入主動(dòng)SCSI端接（線熱插入有源的SCSI終端器） |
| 文件頁(yè)數(shù)： | 1/8頁(yè) |
| 文件大?。?/td> | 84K |
| 代理商： | ML6518 |
August 2000
ML6518
18 Line Hot-Insertable Active SCSI Terminator
GENERAL DESCRIPTION
NCLAMP = Negative Clamp
Circuit design patent pending.
FEATURES
I
Fully monolithic IC solution providing active
termination for 18 lines of the SCSI bus
I
Provides onboard support for hot-insertability on the
SCSI bus
I
Low dropout voltage (1V) linear regulator, trimmed for
accurate termination current
I
Low disconnect capacitance (typically < 5pF)
I
Logic pin with active pull-up to disconnect terminator
from the SCSI bus
I
Current sinking capability in excess of 8.3mA per line to
handle active negation driver overshoots above 2.85V
I
Negative clamping on all lines to handle signal
assertion transients
I
Regulator can source 400mA and sink 150mA while
maintaining regulation
I
Current limit and thermal shutdown protection
The ML6518 BiCMOS 18 line SCSI terminator provides
active termination in SCSI systems using single-ended
drivers and receivers. Active SCSI termination helps to
effectively control analog transmission line effects such as
ringing, noise, crosstalk, and ground bounce. In addition,
the ML6518 provides support for hot insertability on the
SCSI bus.
The ML6518 provides a V-I characteristic optimized to
minimize transmission line effects during both signal
negation and assertion using a MOSFET-based
architecture. The desired V-I characteristic is achieved by
trimming one resistor in the control block. Internal
clamping controls signal assertion transients and provides
current sink capability to handle active negation driver
overshoots above 2.85V. It provides a 2.85V reference
through an internal low dropout (1V) linear regulator.
The ML6518 also provides a disconnect function which
effectively removes the terminator from the SCSI bus. The
disconnect mode capacitance is typically less than 5pF
per line. Current limiting and thermal shutdown protection
are also included.
BLOCK DIAGRAM
TERMPWR
LINEAR
REGULATOR
1V DROPOUT
2.85V
DISCNKT
CONTROL
BLOCK
V
REF
R
TRIM
MOSFETs WITH I
MAX
= 24mA
. . .
NCLAMP
.
18 TERMINATION LINES
. . .
.
NCLAMP
NCLAMP
. . .
GND
L2
L18
L1
V
REF
2.85V
REV. 1.0 10/25/2000
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ML6518CH | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| ML6518CS | 制造商:MICRO-LINEAR 制造商全稱:MICRO-LINEAR 功能描述:18 Line Hot-Insertable Active SCSI Terminator |
| ML65244 | 制造商:MICRO-LINEAR 制造商全稱:MICRO-LINEAR 功能描述:High Speed Dual Quad Buffer/Line Drivers |
| ML65244 WAF | 制造商:Fairchild Semiconductor Corporation 功能描述: |
| ML65244CK | 制造商:MICRO-LINEAR 制造商全稱:MICRO-LINEAR 功能描述:High Speed Dual Quad Buffer/Line Drivers |
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