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AM79C987

更新时间： 2024-02-23 18:22:34
品牌 Logo 应用领域
超微 - AMD /
页数 文件大小 规格书
30页 181K
描述
Hardware Implemented Management Information Base (HIMIB) Device

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AM79C987 技术参数

是否无铅： 含铅是否Rohs认证： 不符合
生命周期：Obsolete零件包装代码：QLCC
包装说明：QCCJ,针数：28
Reach Compliance Code：unknownHTS代码：8542.39.00.01
风险等级：5.9Is Samacsys：N
JESD-30 代码：S-PQCC-J28JESD-609代码：e0
湿度敏感等级：2功能数量：1
端子数量：28最高工作温度：70 °C
最低工作温度：封装主体材料：PLASTIC/EPOXY
封装代码：QCCJ封装形状：SQUARE
封装形式：CHIP CARRIER峰值回流温度（摄氏度）：220
认证状态：Not Qualified标称供电电压：5 V
表面贴装：YES技术：CMOS
电信集成电路类型：ETHERNET TRANSCEIVER温度等级：COMMERCIAL
端子面层：TIN LEAD端子形式：J BEND
端子位置：QUAD处于峰值回流温度下的最长时间：NOT SPECIFIED
Base Number Matches：1

AM79C987 数据手册

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PRELIMINARY  
Am79C987  
Hardware Implemented Management Information Base™  
(HIMIB™) Device  
DISTINCTIVE CHARACTERISTICS  
■ Provides repeater management functions,  
complying with all options detailed in the layer  
management for 10 Mbyte/s Baseband  
Repeaters (IEEE 802.3k) standard  
■ Maskable interrupts for notification of status/  
error reporting  
■ Internal “receive only” MAC tracks all address  
information and monitors exception conditions  
■ Fully compatible with the Novell Hub  
■ Supports mapping of node source addresses to  
port numbers, through implementing source  
address match function  
Management Interface (HMI) specification  
■ Provides additional IEEE MAU management  
functions (802.3p draft)  
■ Full 32-bit hardware-implemented counters  
incur no additional software overhead to keep  
network statistics  
■ Interfaces directly with AMD’s Am79C981  
Integrated Multiport Repeater Plus™ (IMR+™)  
device to build a fully managed repeater  
■ Pinout allows simple board layout between  
■ Multiple HIMIB/IMR+ devices can be used in a  
IMR+ and HIMIB devices  
system  
■ 28-pin PLCC device in CMOS technology for low  
■ 8-bit microprocessor interface allows attribute  
access, interrupt control, and management  
control  
power with a single +5 V supply  
GENERAL DESCRIPTION  
The Am79C987 Hardware Implemented Management  
Information Base (HIMIB) device is a highly integrated  
chip that simplifies building fully managed multiport re-  
peaters. The device integrates all the necessary  
counters, attributes, actions, and notifications specified  
by the Layer Management for 10 Mbyte/s Baseband  
Repeaters (IEEE 802.3k) standard, as well as addi-  
tional features and enhancements, including functions  
specific to 10BASE-T repeaters.  
device, the HIMIB chip provides complete repeater and  
per-port statistics on demand from an 8-bit parallel in-  
terface. No external processor is required to keep track  
of attributes locally, as full 32-bit counters are provided.  
The HIMIB device implements a simple 8-bit micropro-  
cessor interface, allowing multiple HIMIB devices to be  
used in a system. No additional logic is required for in-  
terfacing the HIMIB device to the IMR+ device.  
The HIMIB chip is packaged in a 28-pin plastic leaded  
chip carrier (PLCC). The device is fabricated in CMOS  
technology and requires a single +5 V supply.  
The HIMIB chip is designed to be used in conjunction  
with AMD’s Integrated Multiport Repeater Plus (IMR+)  
device. When connected to an IMR+ (Am79C981)  
Publication# 17305 Rev: B Amendment/0  
Issue Date: May 1994  
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.  
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