The bipolar LSI MC68194 Carrier Band Modem (CBM) when combined with the MC68824 Token Bus Controller provides an IEEE 802.4 single channel, phase–coherent carrier band Local Area Network (LAN) connection. The CBM performs the Physical Layer function including symbol encoding/decoding, signal transmission and reception, and physical management.
The document describes the MC68194 Carrier Band Modem (CBM), a bipolar LSI device designed for use with the MC68824 Token Bus Controller to form an IEEE 802.4 single channel, phase–coherent carrier band Local Area Network node. The CBM integrates the physical layer functions of data transmission and reception using Frequency Shift Keying (FSK) modulation.
| Supported Data Rates | 1 to 10 Mbps |
|---|---|
| Power Supply Voltage | +5.0 V |
| Package Type | 52-lead Cerquad |
| Modulation Technique | Phase-coherent FSK |
It provides the Physical Layer function including symbol encoding/decoding, signal transmission and reception, and physical management for an IEEE 802.4 token bus LAN node.
Yes, an external crystal or clock source is required for onboard timing and transmit clock generation.