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The 74HC/HCT147 9-input priority encoders accept data from nine active LOW inputs (A0 to A8) and provide a binary representation on the four active LOW outputs (Y0 to Y3). A priority is assigned to each input so that when two or more inputs are simultaneously active, the input with the highest priority is represented on the output, with input line A8 having the highest priority.
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.
Limiting values are given in accordance with the Absolute Maximum Rating System (IEC 134). Stress above one or more of the limiting values may cause permanent damage to the device. These are stress ratings only and operation of the device at these or at any other conditions above those given in the Characteristics sections of this specification is not implied. Exposure to limiting values for extended periods may affect device reliability.