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参数资料
| 型号： | LTC1689CS |
| 厂商： | Linear Technology |
| 文件页数： | 12/12页 |
| 文件大小： | 0K |
| 描述： | IC DVR 100MBPS RS485 QUAD 16SOIC |
| 标准包装： | 50 |
| 类型： | 驱动器 |
| 驱动器/接收器数： | 4/0 |
| 规程： | RS485 |
| 电源电压： | 3V，5V |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 16-SOIC（0.154"，3.90mm 宽） |
| 供应商设备封装： | 16-SOIC |
| 包装： | 管件 |
9
LTC1688/LTC1689
16889fa
APPLICATIONS INFORMATION
WU
U
High Speed Twisted-Pair Transmission
Data rates up to 100Mbps can be transmitted over short
distances using Category 5 UTP (unshielded twisted pair).
The cable distance will determine the maximum data rate.
Figures 11 and 12 show an 8ns pulse propagating over 25
feet of Category 5 UTP. Notice how the cable attenuates the
signal. Lucent Technologies’ BRF2A and BRS2A receivers
are recommended for these ultrahigh speed applications.
High Speed Backplane Transmission
The LTC1688/LTC1689 can be used in backplane point-to-
point and multipoint applications. At high data rates,
signals should be routed differentially and PC traces
should be terminated (see Figure 13). Note that the RS485
specification calls for characteristic impedances near 100
;
therefore, PC trace transmission lines should be designed
with an impedance close to 100
. If trace impedance is
much less than 100
, and the trace is double terminated,
the part will experience excess heating. The propagation
delay could then fall outside the specified window. The
LT1720 dual UltraFast
TM comparator is a good choice for
high data rate backplane applications.
Figure 12. 100Mbps Differential Data Connection
Figure 11. 8ns Pulse Over 25 Feet Category 5 UTP
10ns/DIV
2V/DIV
5V/DIV
1688/89 F11
DRIVER INPUT
DRIVER OUTPUT
RECEIVER INPUT
RECEIVER OUTPUT
1688/89 F12
RECEIVER
1/4 LTC1688
100
100
+
–
25 FT CATEGORY 5 UTP
DRIVER
Figure 13. 100Mbps Backplane Transmission
BACKPLANE
RECEIVER
1/4 LTC1688
1/2 LT1720
100
1688/89 F13
DRIVER
TRANSMISSION LINE
UltraFast is a trademark of Linear Technology Corporation.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LTC1689CS#PBF | 功能描述:IC DVR 100MBPS RS485 QUAD 16SOIC RoHS:是 类别:集成电路 (IC) >> 接口 - 驱动器，接收器，收发器 系列:- 产品培训模块:RS-232 & USB Transceiver 标准包装:2,000 系列:- 类型:收发器 驱动器/接收器数:1/1 规程:RS232 电源电压:3 V ~ 5.5 V 安装类型:表面贴装 封装/外壳:16-SSOP（0.209"，5.30mm 宽） 供应商设备封装:16-SSOP 包装:带卷 (TR) 其它名称:296-19849-2 |
| LTC1689CS#PBF | 制造商:Linear Technology 功能描述:DIFFERENTIAL LINE DRIVER, 100MBPS, SOIC- |
| LTC1689CS#TR | 功能描述:IC DVR 100MBPS QUAD RS485 16SOIC RoHS:否 类别:集成电路 (IC) >> 接口 - 驱动器，接收器，收发器 系列:- 标准包装:27 系列:- 类型:收发器 驱动器/接收器数:3/3 规程:RS232，RS485 电源电压:4.75 V ~ 5.25 V 安装类型:表面贴装 封装/外壳:28-SOIC（0.295"，7.50mm 宽） 供应商设备封装:28-SOIC 包装:管件 |
| LTC1689CS#TRPBF | 功能描述:IC DVR 100MBPS RS485 QUAD 16SOIC RoHS:是 类别:集成电路 (IC) >> 接口 - 驱动器，接收器，收发器 系列:- 标准包装:27 系列:- 类型:收发器 驱动器/接收器数:3/3 规程:RS232，RS485 电源电压:4.75 V ~ 5.25 V 安装类型:表面贴装 封装/外壳:28-SOIC（0.295"，7.50mm 宽） 供应商设备封装:28-SOIC 包装:管件 |
| LTC1689IS | 功能描述:IC DVR 100MBPS RS485 QUAD 16SOIC RoHS:否 类别:集成电路 (IC) >> 接口 - 驱动器，接收器，收发器 系列:- 标准包装:27 系列:- 类型:收发器 驱动器/接收器数:3/3 规程:RS232，RS485 电源电压:4.75 V ~ 5.25 V 安装类型:表面贴装 封装/外壳:28-SOIC（0.295"，7.50mm 宽） 供应商设备封装:28-SOIC 包装:管件 |
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