データシートサーチシステム |
|
AM79C982-4JC データシート(PDF) 1 Page - Advanced Micro Devices |
|
AM79C982-4JC データシート(HTML) 1 Page - Advanced Micro Devices |
1 / 26 page PRELIMINARY This document contains information on a product under development at Advanced Micro Devices. The information is intended to help you evaluate this product. AMD reserves the right to change or discontinue work on this proposed product without notice. Publication# 19406 Rev: B Amendment/0 Issue Date: January 1999 1-3 Am79C982 basic Integrated Multiport Repeater ( bIMR) DISTINCTIVE CHARACTERISTICS s Fully backward-compatible with existing IMR/IMR+ device non-managed hub designs — Pin/socket-compatible with the Am79C980 (IMR) and Am79C981 (IMR+) devices s Repeater functions comply with IEEE 802.3 Repeater Unit specifications s Four and eight 10BASE-T port options available s Low-cost, flexible solutions suitable for non-managed repeater designs s Integral 10BASE-T transceivers utilize the required predistortion transmission technique s Attachment unit interface (AUI) port allows connectivity with 10BASE-5 (Ethernet) and 10BASE-2 (Cheapernet) networks, as well as 10BASE-F and/or Fiber Optic Inter-Repeater Link (FOIRL) segments s Minimum mode facilitates LED implementation and provides four LED display options for port status s Built-in pulse stretching for carrier sense LED display s On-board PLL, Manchester encoder/decoder, LED display and FIFO s Expandable to increase number of repeater ports s All ports can be separately isolated (partitioned) in response to excessive collision conditions or fault conditions s Network management and optional features are accessible through a dedicated serial management port s Twisted-pair Link Test capability conforming to the 10BASE-T standard. The receive Link Test function can be optionally disabled through the management port to facilitate interoperability with devices that do not implement the Link Test function s Programmable option of Automatic Polarity Detection and Correction permits automatic recovery due to wiring errors s Full amplitude and timing regeneration for retransmitted waveforms s Preamble loss effects eliminated by deep FIFO s CMOS device features high integration and low power with a single +5 V supply GENERAL DESCRIPTION The basic Integrated Multiport Repeater (bIMR™) chip is a VLSI circuit that provides a system-level solution to designing a compliant 802.3 repeater incorporating 10BASE-T transceivers. The device integrates the Repeater functions specified by Section 9 of the IEEE 802.3 standard and twisted-pair Transceiver functions complying to the 10BASE-T standard. The Am79C982-4 provides four and the Am79C982-8 pro- vides eight integral twisted-pair medium attachment units (MAUs), and an attachment unit interface (AUI) port in an 84-pin plastic leaded chip carrier (PLCC). A network based on the 10BASE-T standard uses un- shielded twisted-pair cables, therefore providing an economical solution to networking by allowing the use of low-cost unshielded twisted-pair (UTP) cable or existing telephone wiring. The total number of ports per repeater unit can be in- creased by connecting multiple bIMR devices through their expansion ports, hence minimizing the total cost per repeater port. Furthermore, a general-purpose attachment unit interface (AUI) provides connection capability to 10BASE-5 (Ethernet) and 10BASE-2 (Cheapernet) coaxial networks, as well as 10BASE-F and/or Fiber Optic Inter-Repeater Link (FOIRL) fiber segments. Network management and test functions are provided through TTL-compatible I/O pins. The device is fabricated in CMOS technology and requires a single +5 V supply. |
同様の部品番号 - AM79C982-4JC |
|
同様の説明 - AM79C982-4JC |
|
|
リンク URL |
プライバシーポリシー |
ALLDATASHEET.JP |
ALLDATASHEETはお客様のビジネスに役立ちますか? [ DONATE ] |
Alldatasheetは | 広告 | お問い合わせ | プライバシーポリシー | リンク交換 | メーカーリスト All Rights Reserved©Alldatasheet.com |
Russian : Alldatasheetru.com | Korean : Alldatasheet.co.kr | Spanish : Alldatasheet.es | French : Alldatasheet.fr | Italian : Alldatasheetit.com Portuguese : Alldatasheetpt.com | Polish : Alldatasheet.pl | Vietnamese : Alldatasheet.vn Indian : Alldatasheet.in | Mexican : Alldatasheet.com.mx | British : Alldatasheet.co.uk | New Zealand : Alldatasheet.co.nz |
Family Site : ic2ic.com |
icmetro.com |