參數(shù)資料
型號: SN65HVD
廠商: Texas Instruments, Inc.
英文描述: 3.3-V RS-485 Transceivers(3.3V,RS-485收發(fā)器)
中文描述: 3.3V的RS - 485收發(fā)器(3.3V,RS - 485接口收發(fā)器)
文件頁數(shù): 16/19頁
文件大小: 142K
代理商: SN65HVD
SN65HVD10,SN65HVD10Q,SN75HVD10
SN65HVD11,SN65HVD11Q,SN75HVD11
SN65HVD12,SN75HVD12
SLLS505E
FEBRUARY 2002
REVISED NOVEMBER 2002
www.ti.com
16
APPLICATION INFORMATION
RT
RT
Device
HVD10
HVD11
HVD12
Number of Devices on Bus
64
256
256
NOTE:The line should be terminated at both ends with its characteristic impedance (RT = ZO). Stub lengths off the main line
should be kept as short as possible.
Stub
Figure 21. Typical Application Circuit
Driver Input
Driver Output
Receiver Input
Receiver Output
Figure 22. HVD12 Input and Output Through 2000 Feet of Cable
An example application for the HVD12 is illustrated in
Figure 21. Two HVD12 transceivers are used to
communicate data through a 2000 foot (600 m) length of
Commscope 5524 category 5e+ twisted pair cable. The
bus is terminated at each end by a 100-
resistor,
matching the cable characteristic impedance. Figure 22
illustrates operation at a signaling rate of 250 kbps.
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