LOW POWER ETHERNET COAXIAL TRANSCIVER

The 78Q8392L/A03 Ethernet Transceiver is a replacement for the SSI/TDK/Teridian 78Q8392L/A02 coax line transmitter/receiver. Only a single resistor value change is required for upgrading an existing 78Q8392L/A02 design to the 78Q8392L/A03. The device includes analog transmit and receive buffers, a 10 MHz on-board oscillator, timing logic for jabber and heartbeat functions, output drivers and bandgap reference, in addition to a current reference and collision detector. This transceiver provides the interface between the single-ended coaxial cable signals and the Manchester-encoded differential logic signals. Primary functional blocks include the receiver, transmitter, collision detection and jabber timer. This IC may be used in either internal or external MAU environments. The 78Q8392L/A03 is available in lead-free 16-pin plastic and 28-pin PLCC packages.

• Very low power consumption
• Compliant with Ethernet II, IEEE 802.3 10Base5 and 10Base2
• Integrates all transceiver functions except signal and power isolation
• Innovative design minimizes external component count and power consumption
• Jabber timer function integrated on chip
• Externally selectable CED heartbeat allows operation with IEEE 802.3 compatible repeaters
• Squelch circuitry at all inputs rejects noise
• Power-on reset and test modes
• Advanced BiCMOS process