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參數(shù)資料
| 型號(hào)： | UCC5640PW |
| 英文描述： | Low Power OFF-Line SMPS Primary Switcher |
| 中文描述： | 終結(jié)者 |
| 文件頁(yè)數(shù)： | 1/5頁(yè) |
| 文件大?。?/td> | 265K |
| 代理商： | UCC5640PW |
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(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| UCC5640PW24 | 功能描述:SCSI 接口集成電路 9line 3-5V SCSI Mult 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(fēng)格:SMD/SMT 封裝 / 箱體:SSOP-36 封裝:Tube |
| UCC5640PW-24 | 制造商:UNITRODE 功能描述: |
| UCC5640PW24G4 | 功能描述:SCSI 接口集成電路 9 Line 2.7-5V LVD for Ultra2-Ultra320 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(fēng)格:SMD/SMT 封裝 / 箱體:SSOP-36 封裝:Tube |
| UCC5640PW24TR | 功能描述:SCSI 接口集成電路 9 Line 2.7-5V LVD for Ultra2-Ultra320 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(fēng)格:SMD/SMT 封裝 / 箱體:SSOP-36 封裝:Tube |
| UCC5640PW24TRG4 | 功能描述:SCSI 接口集成電路 9 Line 2.7-5V LVD for Ultra2-Ultra320 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(fēng)格:SMD/SMT 封裝 / 箱體:SSOP-36 封裝:Tube |
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