- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄377972 > ML6509 (Fairchild Semiconductor Corporation) Active SCSI Terminator(SCSI系統(tǒng)的有源終端器) PDF資料下載
參數(shù)資料
| 型號(hào)： | ML6509 |
| 廠商： | Fairchild Semiconductor Corporation |
| 英文描述： | Active SCSI Terminator(SCSI系統(tǒng)的有源終端器) |
| 中文描述： | 活躍的SCSI終結(jié)者（的SCSI系統(tǒng)的有源終端器） |
| 文件頁數(shù)： | 1/10頁 |
| 文件大小： | 121K |
| 代理商： | ML6509 |
February 1997
ML6509
*
Active SCSI Terminator
GENERAL DESCRIPTION
The ML6509 BiCMOS SCSI terminator provides active
termination in a SCSI system with single ended drivers and
receivers, in full compliance with the SCSI-1, SCSI-2 and
SCSI-3 recommendations. It provides a 2.85V reference
through an internal 1V dropout linear regulator. Active
SCSI termination helps the system designer to effectively
control analog transmission line effects like ringing, noise,
crosstalk, ground bounce, etc. In addition it provides
greater immunity to voltage drops on the TERMPWR line
of the SCSI bus. The desired V-I characteristics for signal
negation requires that the terminator source 0–24mA
while maintaining 2.85V and for signal assertion
preferably follow a linear slope of 110
. The ML6509
attempts to provide a V-I characteristic optimized to
minimize the transmission line effects during both signal
assertion and negation, using a MOSFET based
architecture. The desired V-I characteristic is achieved by
trimming one resistor in the control block. It provides
negative clamping for signal assertion transients and
current sink capability, to handle active negation driver
overshoots above 2.85V, which is currently accomplished
with external components in SCSI subsystems today. It
provides a disconnect mode, where the terminator is
completely disconnected from the SCSI
bus and the output capacitance is < 5pF, typically.
FEATURES
I
Fully monolithic IC solution providing active
termination for 9 lines of the SCSI bus
I
Low dropout voltage (1V) linear regulator, trimmed for
accurate termination current, with 300mA current
source capability
I
Output capacitance typically <5pF
I
Disconnect mode — logic pin to disconnect terminator
from the SCSI bus, <100μA
I
Lowpower mode — for power conscious, portable
system & peripheral applications, using less than 6"
cables. (Equivalent to a 1mA current drive with a
2.5k
termination)
I
Current sinking — can sink current >10mA 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 200mA and sink 50mA while
maintaining regulation
I
Current limit & thermal shutdown protection
I
Small and low profile package options; 16-pin SOIC
(300 mil), 20-pin TSSOP (1 mil height)
* Some Packages Are End Of Life As Of August 1, 2000
BLOCK DIAGRAM
NCLAMP = Negative Clamp
TERMPWR
LINEAR
REGULATOR
1V DROPOUT
2.85V
216mA
(MAX)
2.85V
DISCNKT
LPWR
CONTROL
BLOCK
V
REF
R
TRIM
MOSFETs WITH I
MAX
= 24mA
NORMAL MODE
. . .
NCLAMP
.
MOSFETs WITH I
MAX
= 1mA
LOW POWER MODE
9 TERMINATION LINES
. . .
. . .
NCLAMP
NCLAMP
GND
V
REF
REV. 1.0 10/25/2000
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| ML6510 | Series Programmable Adaptive Clock Manager(系列可編程自適應(yīng)時(shí)鐘管理器) |
| ML6516244 | 16-Bit Buffer/Line Driver with 3-State Outputs(BiCMOS 16位緩沖器/線驅(qū)動(dòng)器（三態(tài)輸出）) |
| ML6518 | 18 Line Hot-Insertable Active SCSI Terminator(線熱插入有源SCSI終端器) |
| ML65244 | High Speed Dual Quad Buffer/Line Drivers(高速雙通道四緩沖器/線驅(qū)動(dòng)器) |
| ML65L244 | High Speed Dual Quad Buffer/Line Drivers(高速雙通道四緩沖器/線驅(qū)動(dòng)器) |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ML6509 WAF | 制造商:Fairchild Semiconductor Corporation 功能描述: |
| ML6509CS | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| ML6509CS WAF UP | 制造商:Fairchild Semiconductor Corporation 功能描述: |
| ML6509CS UP WAF | 制造商:Fairchild Semiconductor Corporation 功能描述: |
| ML6509CT | 制造商:MICRO-LINEAR 制造商全稱:MICRO-LINEAR 功能描述:Active SCSI Terminator |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。