NE83Q92

The NE83Q92 is a low power BiCMOS coaxial transceiver interface (CTI) for Ethernet (10base5) and Thin Ethernet (10base2) local area networks. The CTI NE83Q92 is connected between the coaxial cable and the Data Terminal Equipment (DTE) and consists of a receiver, transmitter, receive-mode collision detector, heartbeat generator and jabber timer (see Block Diagram). The transmitter output connects directly to a doubly terminated 50W cable, while the receiver output, collision detector output and transmitter input of NE83Q92 are connected to the DTE through isolation transformers. Isolation between the CTI and the DTE is an IEEE 802.3 requirement that can be met on signal lines by using a set of pulse transformers. Power isolation for the CTI is achieved using DC-to-DC conversion through a power transformer(see Figure 1, Connection Diagram).

The NE83Q92 is fully pin compatible with the industry standard 8392, but has substantially lower current consumption, is fully compliant with the IEEE802.3 standard, and has additional features such as optional pull-down resistors (Figure 1, Note 4), and automatic selection between AUI and coaxial connections.

The NE83Q92 is manufactured on an advanced BiCMOS process and is available with PLCC and SOL packages which make it ideally suited to lap-top personal computers or systems where low power consumption, limited board space and jumperless design is required. Refer to selection flow chart for optimal apllication.