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부품번호 | LXT386 기능 |
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기능 | (LXT384 - LXT388) Twisted Pair Interface | ||
제조업체 | Intel | ||
로고 | |||
전체 20 페이지수
LXT384/6/8 Twisted Pair Interface
— Without Component Changes
Application Note
January 2001
www.DataSheet4U.com
www.DataSheet4U.com
Order Number: 249138-001
As of January 15, 2001, this document replaces the Level One document known as AN128.
4페이지 3.0
LXT384/6/8 Twisted Pair Interface — Without Component Changes
LXT 384/6/8 Standard Line Interface Circuitry
Figure 1 shows the line interface circuitry as recommended in the LXT384/6/8 data-sheets.
In the transmit section, the RT resistors change from E1 to T1. In T1 mode, series resistors are only
supported when the transmitter power supply (TVCC) is set to 5V.
In the receive section, the RR resistors are selected so that the input impedance offered by the
receive circuitry matches the characteristic line impedance. Therefore, RR is such that:
ZL = r2 (2 RR)
Where ZL is the line characteristic impedance and r is the transformer turns ratio (in this case r = 2).
Consequently, to obtain optimum impedance matching and receive return loss performance, the
designer typically changes RR when the line impedance changes. This is the case going from a T1
100Ω line impedance to an E1 120Ω line impedance.
In the following section we will show that simple solutions exist for supporting T1/E1 twisted pair
interfaces without component changes. Transmit and receive interfaces are addressed in separate
sections. The performance tradeoffs for each of the suggested configurations is discussed. Test data
is provided along with the recommended configurations.
Note that E1 coaxial cable interface is not addressed in this application note as most of the modern
designs use twisted pair interfaces. In many applications, support for coaxial cable can be added
with external baluns. For more information on supporting E1 coaxial and twisted pair interface in
the same design, please refer to the LXT384 FAQ and the “LXT380 Design Assistant” at
www.developer.intel.com/design/network.
Application Note
7
7페이지 | |||
구 성 | 총 20 페이지수 | ||
다운로드 | [ LXT386.PDF 데이터시트 ] |
당사 플랫폼은 키워드, 제품 이름 또는 부품 번호를 사용하여 검색할 수 있는 |
구매 문의 | 일반 IC 문의 : 샘플 및 소량 구매 ----------------------------------------------------------------------- IGBT, TR 모듈, SCR 및 다이오드 모듈을 포함한 광범위한 전력 반도체를 판매합니다. 전력 반도체 전문업체 상호 : 아이지 인터내셔날 사이트 방문 : [ 홈페이지 ] [ 블로그 1 ] [ 블로그 2 ] |
부품번호 | 상세설명 및 기능 | 제조사 |
LXT381 | Octal E1 Line Interface Unit | Intel Corporation |
LXT384 | Octal T1/E1/J1 Short Haul PCM Transceiver | Intel |
DataSheet.kr | 2020 | 연락처 | 링크모음 | 검색 | 사이트맵 |