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參數(shù)資料
| 型號： | UCC5681 |
| 英文描述： | OFF-line Primary Switch |
| 中文描述： | 9線2.7 - 5V的內徑期限。通過Ultra320 SCSI的瓦特Ultra2 /的SPI - 3模式的轉變延遲 |
| 文件頁數(shù)： | 1/5頁 |
| 文件大小： | 265K |
| 代理商： | UCC5681 |
The UCC5610 provides 18 lines of active termination for a SCSI (Small
Computer Systems Interface) parallel bus. The SCSI standard recom-
mends active termination at both ends of the cable.
The UCC5610 is ideal for high performance 3.3V SCSI systems. The key
features contributing to such low operating voltage are the 0.1V drop out
regulator and the 2.75V reference. The reduced reference voltage was
necessary to accommodate the lower termination current dictated in the
SCSI-3 specification. During disconnect the supply current is typically
only 0.5
μ
A, which makes the IC attractive for battery powered systems.
The UCC5610 is designed with an ultra low channel capacitance of
1.8pF, which eliminates effects on signal integrity from disconnected ter-
minators at interim points on the bus.
The UCC5610 can be programmed for either a 110 ohm or 2.5k ohm ter-
mination. The 110 ohm termination is used for standard SCSI bus lengths
and the 2.5k ohm termination is typically used in short bus applications.
When driving the TTL compatible DISCNCT pin directly, the 110 ohm ter-
mination is connected when the DISCNCT pin is driven low, and discon-
nected when driven high. When the DISCNCT pin is driven through an
impedance between 80k and 150k, the 2.5k ohm termination is con-
nected when the DISCNCT pin is driven low, and disconnected when
driven high.
UCC5610
18-Line 3-5 Volt Low Capacitance SCSI Active Terminator
FEATURES
Complies with SCSI, SCSI-2, SCSI-3
and FAST-20 (Ultra) Standards
DESCRIPTION
BLOCK DIAGRAM
Circuit Design Patented
2.75V to 7V Operation
1.8pF Channel Capacitance during
Disconnect
0.5
μ
A Supply Current in Disconnect
Mode
110 Ohm/2.5k Programmable
Termination
Completely Meets SCSI Hot Plugging
-650mA Sourcing Current for
Termination
+400mA Sinking Current for Active
Negation Drivers
Trimmed Termination Current to 4%
Trimmed Impedance to 7%
Current Limit and Thermal Shutdown
Protection
continued
2/97
UDG-94128-1
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相關PDF資料 |
PDF描述 |
|---|---|
| UCC5610 | 18-Line SCSI Terminator(18線 小型計算機系統(tǒng)終端匹配器) |
| UCC5611 | SCSI 18 Line Terminator(計算機系統(tǒng)接口18線終端匹配器) |
| UCC5618 | 18-Line SCSI Terminator(18線 小型計算機系統(tǒng)終端匹配器) |
| UCC5619 | 27-Line SCSI Terminator With Reverse Disconnect(27線小型計算機接口終端匹配器（帶反向斷開）) |
| UCC5620 | 27-Line SCSI Terminator(27線小型計算機接口終端匹配器) |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| UCC5681PW24 | 功能描述:SCSI 接口集成電路 9 Line 2.7- 5V LVD Term RoHS:否 制造商:Texas Instruments 工作電源電壓:2.7 V to 5.25 V 電源電流:13 mA 最大工作溫度:+ 70 C 最小工作溫度:0 C 安裝風格:SMD/SMT 封裝 / 箱體:SSOP-36 封裝:Tube |
| UCC5681PW24G4 | 功能描述:SCSI 接口集成電路 9 Line 2.7- 5V LVD Term RoHS:否 制造商:Texas Instruments 工作電源電壓:2.7 V to 5.25 V 電源電流:13 mA 最大工作溫度:+ 70 C 最小工作溫度:0 C 安裝風格:SMD/SMT 封裝 / 箱體:SSOP-36 封裝:Tube |
| UCC5681PW28 | 制造商:Rochester Electronics LLC 功能描述:- Bulk 制造商:Texas Instruments 功能描述: |
| UCC5686 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:27-LINE 3-V - 5V LVD TERMINATOR FOR WIDE ULTRA2, ULTRA3,ULTRA160,AND ULTRA320 SCSI WITH INTEGRATED SPI-3 DELAY |
| UCC5686PM | 功能描述:SCSI 接口集成電路 27Ln 3-5V SCSI Multi RoHS:否 制造商:Texas Instruments 工作電源電壓:2.7 V to 5.25 V 電源電流:13 mA 最大工作溫度:+ 70 C 最小工作溫度:0 C 安裝風格:SMD/SMT 封裝 / 箱體:SSOP-36 封裝:Tube |
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