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UCC5646

更新时间： 2024-09-20 12:22:35
品牌 Logo 应用领域
德州仪器 - TI /
页数 文件大小 规格书
7页 125K
描述
27-LINE 3-V - 5-V LVD TERMINATOR FOR WIDE ULTRA2, ULTRA3, ULTRA160 AND ULTRA320

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中文翻译

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UCC5646 数据手册

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SLUS386B − FEBRUARY 2000 − REVISED APRIL 2001  
PM PACKAGE  
(TOP VIEW)  
D
SCSI SPI-2, SPI-3, SPI-4,  
Ultra160, Ultra320 Compliance  
D
D
Smallest Footprint  
Lowest Channel  
Capacitance, 2 pF  
64 63 62 61 60 59 58 57 56 55 54 53 52 51 50 49  
L25−  
L25+  
{DISCNCT1  
{DISCNCT2  
L21−  
1
2
3
4
5
6
7
8
9
48  
47  
46  
45  
44  
43  
42  
41  
40  
D
Less than 0.5-pF Capacitance  
Differential Between Pairs  
L26−  
L26+  
L21+  
D
D
D
2.7 V to 5.25 V Operation  
Differential Failsafe Bias  
L27−  
L20−  
L27+  
L20+  
64-Pin Low Profile QFP  
STRMPWR  
PTRMPWR  
REG  
L19−  
L19+  
DIFSENS  
SGND  
39 DIFFB  
38 L18−  
37 L18+  
10  
PGND 11  
LVD 12  
36  
35  
34  
33  
L10− 13  
L17−  
L17+  
L16−  
L16+  
14  
15  
16  
L10+  
L11−  
L11+  
171819 20 21 22 23 24 25 26 27 28 29 30 31 32  
{For the UCC5647, Pin 47 is DISCNCT1 and Pin 48 is DISCNCT2.  
description  
The UCC5646 is a twenty-seven line active terminator for low-voltage-differential (LVD) SCSI networks. This  
LVD SCSI-only design allows the user to reach peak bus performance, while reducing system cost. The device  
is designed as an active Y-terminator to improve the frequency response of the LVD SCSI Bus. Designed with  
a 2-pF (typical) channel capacitance, the UCC5646 allows for minimal bus loading for a maximum number of  
peripherals. With the UCC5646, the designer is able to comply with the Ultra2, Ultra3, Ultra160 and Ultra320  
specifications. The UCC5646 also provides a much-needed system migration path for the ever improving SCSI  
system standards.  
This device is available in the 64-pin low-profile QFP package for ease of layout use.  
Single-ended (SE) and high-voltage differential (HVD) SCSI drivers are not supported.  
AVAILABLE OPTIONS  
†
PACKAGED DEVICES  
DISCONNECT  
STATUS  
T
A
LOW PROFILE QFP  
(PM)  
REGULAR  
REVERSE  
UCC5646PM  
UCC5647PM  
0°C to 70°C  
†
The PM package is available taped and reeled. Add TR suffix to  
device type (e.g. UCC5646PMTR) to order quantities of 1000  
devices per reel.  
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of  
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.  
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Copyright 2001, Texas Instruments Incorporated  
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1
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265  
1234567

中文翻译

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