- 您现在的位置：买卖IC网 > PDF目录156623 > 4610M-901-103 KONDENSATOR NETZWERK PDF资料下载
参数资料
| 型号： | 4610M-901-103 |
| 英文描述： | KONDENSATOR NETZWERK |
| 中文描述： | KONDENSATOR NETZWERK |
| 文件页数： | 48/62页 |
| 文件大小： | 1883K |
| 代理商： | 4610M-901-103 |
第1页第2页第3页第4页第5页第6页第7页第8页第9页第10页第11页第12页第13页第14页第15页第16页第17页第18页第19页第20页第21页第22页第23页第24页第25页第26页第27页第28页第29页第30页第31页第32页第33页第34页第35页第36页第37页第38页第39页第40页第41页第42页第43页第44页第45页第46页第47页当前第48页第49页第50页第51页第52页第53页第54页第55页第56页第57页第58页第59页第60页第61页第62页
Specifications are subject to change without notice.
328
configuration (Fig. 1) for the single-ended implementation of the
SCSI bus, or a three-resistor terminator configuration (Fig. 2) for
the differential-line version of the SCSI bus.
In the single-ended configuration, the SCSI bus is defined for
lengths up to 6 meters, while the differential-line version pro-
vides for better commonmode noise immunity over cable
lengths up to 25 meters.
The signal assignments on the single-ended SCSI bus include
8 data lines, 1 parity line, and 9 control lines. Each of these 18
lines must be terminated, and it is convenient to do this using a
resistor network which contains all of the required resistors. An
additional 32 lines are ground or power lines which do not
require termination (there are 50 lines total in the cable). In a
similar fashion, the differential configuration of the SCSI bus
uses 18 pairs of lines, each requiring termination.
As of 1989, an extended version of the SCSI standard has
been in develop-ment by ANSI, called the SCSI-2 bus. This new
standard allows for 16-bit to 32-bit wide data transfers, while
also allowing a higher bit transfer rate.
Two cables are defined in the SCSI-2 bus, termed Cable A and
Cable B, where Cable B is optional (“wide SCSI” option). Cable
A is no different than the single cable used in the original SCSI
bus, and therefore uses the same number and types of resistive
terminators (i.e., dual terminators for single-ended and triple ter-
minators for differential).
Cable B, however, is a 68-line cable, of which 29 lines (single-
ended) or 29 line-pairs (differential) require termination.
Application Guidelines
The principles of transmission-line theory apply to SCSI termi-
nators, and therefore for proper operation their placement must
be restricted to the ends of the bus and nowhere else. This
implies that the terminators should be placed as close to the
SCSI devices as possible. It is permissible to place the termina-
tor inside the SCSI device, but only if that device is located at
the end of the bus.
For disk drive applications, SCSI terminators must be present
on the host adapter card and at the disk drive end as well. Many
disk drive manufacturers have opted to design in removable
SCSI terminators into their units to account for the possibility
that their unit may not be the one at the end of the cable. For
these manufacturers, the combination of a resistor network in a
through-hole version plus a matching socket represents the only
(and expensive) alternative.
A final consideration is the cable itself. Since the terminators
are comprised of 220 ohm and 330 ohm resistors (single-ended),
the cable ideally should have a characteristic impedance which
matches the Thevenin equivalent of this resistor combination,
that is, 132 ohms. In the differential case, a characteristic imped-
ance of 122 ohms would be ideal.
In addition, it is inadvisable to mix different, unmatched cables
in the same bus. Such a practice will result in undesirable signal
reflections which may compromise the integrity of the data transfer.
Bourns supplies a number of resistor network models designed
for both SCSI and SCSI-2 termination .
Cable A (SCSI and SCSI-2) Single-ended
330
220
+ 5V
GROUND
+ SIGNAL
FIGURE 1.
330
150
GROUND
- SIGNAL
FIGURE 2.
330
+ 5V
+ SIGNAL
330
5V
220
Dual
Terminators
3V
132
NO.
PACKAGE
REQ’D.
BOURNS P/N
DIP
1
4120R-3-221/331
CSIP*
2
4611X-104-221/331
CSIP*
3
4608X-104-221/331
MSIP*
3
4308R-104-221/331
Differential:
NO.
PACKAGE
REQ’D.
BOURNS P/N
4120R-820-1
DIP
2
4120R-820-2
DIP
3
4116R-8-2
CSIP*
3
4614M-8-2
MSIP
5
4310M-820-2
4120P-830-2
4420P-820-1
4420P-820-2
4420P-830-2
Cable B (SCSI-2 Only) Single-ended
NO.
PACKAGE
REQ’D.
BOURNS P/N
DIP
2
4118R-3-221/331
CSIP*
3
4612X-104-221/331
CSIP*
4
4610X-104-221/331
MSIP*
4
4310R-104-221/331
NO.
PACKAGE
REQ’D.
BOURNS P/N
DIP
4
4118R-820-2
DIP
5
4116R-8-2
CSIP*
5
4614M-820-2
MSIP*
8
4310M-820-2
*MEDIUM PROFILE (.250” SEATED HEIGHT) AND HIGH PROFILE (.350” SEATED
HEIGHT) ARE AVAILABLE BY PLACING THE LETTER “M” OR “H,” RESPECTIVELY, IN
THE FIFTH POSITION OF THE PART NUMBER.
SCSI Applications
相关PDF资料 |
PDF描述 |
|---|---|
| 4610M-901-104 | Dual/Triple Ultra-Low-Voltage SOT23 µP Supervisory Circuits |
| 4610M-902-103 | KONDENSATOR NETZWERK |
| 4610M-902-104 | Dual/Triple Ultra-Low-Voltage SOT23 µP Supervisory Circuits |
| 4610X-101-101 | WIDERSTAND NETZWERK DICKFILM 100R 5ST |
| 4610X-101-102 | Dual/Triple Ultra-Low-Voltage SOT23 µP Supervisory Circuits |
相关代理商/技术参数 |
参数描述 |
|---|---|
| 4610M-901-103LF | 功能描述:电容器阵列与网络 10Pin 0.01uF 20% Bussed X7R RoHS:否 制造商:AVX 电容:0.1 uF 容差:20 % 电压额定值:6.3 V 元件数量:2 工作温度范围: 外壳长度:0.8 mm 外壳宽度:1.6 mm 外壳高度:0.5 mm 端接类型:SMD/SMT 系列:PG |
| 4610M-901-104 | 功能描述:电容器阵列与网络 10Pin 0.1uF 20% Bussed X7R RoHS:否 制造商:AVX 电容:0.1 uF 容差:20 % 电压额定值:6.3 V 元件数量:2 工作温度范围: 外壳长度:0.8 mm 外壳宽度:1.6 mm 外壳高度:0.5 mm 端接类型:SMD/SMT 系列:PG |
| 4610M-901-104LF | 功能描述:电容器阵列与网络 10Pin 0.1uF 20% Bussed X7R RoHS:否 制造商:AVX 电容:0.1 uF 容差:20 % 电压额定值:6.3 V 元件数量:2 工作温度范围: 外壳长度:0.8 mm 外壳宽度:1.6 mm 外壳高度:0.5 mm 端接类型:SMD/SMT 系列:PG |
| 4610M-901-104LF | 制造商:Bourns Inc 功能描述:CAPACITOR ARRAY 0.1UF 50V X7R SIP 制造商:Bourns Inc 功能描述:CAPACITOR, ARRAY, 0.1UF, 50V, X7R, SIP |
| 4610M-901-104LF | 制造商:Bourns Inc 功能描述:CAPACITOR NETWORK 0.1UF ((NW)) |
发布紧急采购，3分钟左右您将得到回复。