DESCRIPTION

The NE8392C Coaxial Transceiver Interface (CTI) is a bipolar coaxial line driver/receiver for Ethernet (10base5) and Thin Ethernet (10base2) local area networks. The CTI 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 50Ω cable, while the receiver output, collision detector output and transmitter input 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 normally available in a standard 16-pin DIP. Power isolation for the CTI is achieved using DC-to-DC conversion through a power transformer (see Figure 1, Connection Diagram).

FEATURES

• Compatible with Ethernet II IEEE 802.3 10base5 and 10base2, and ISO 8802/3 interface specifications

• 100 drop-in compatible with industry standard 8392 sockets

• Integrates all transceiver electronics except signal and power isolation

• Only one external resistor required for setting coaxial signaling current

• Jabber timer function integrated on chip

• Heartbeat generator can be externally disabled for operation as IEEE 802.3 compatible repeaters

• On-chip precision voltage reference for receive mode collision detection

• Squelch circuitry on all signal inputs rejects noise

• Full ESD protection

• Standard 16-pin DIP and 28-pin PLCC packages

• Power-on reset prevents glitches on coaxial cable during power up.

• Also available in advanced low-power BiCMOS technology. (See selection chart and data sheets for the NE83C92, NE83Q92 or NE83Q93 for appropriate optimal usages)