DQ8020 Datasheet | LSI Logic

.. 8020 8020 MCC Manchester Code Converter Features s patible with IEEE 802.3 /Ethernet (10BASE5), IEEE802.3/Cheapernet (10BASE2) and Ethernet Note: Check for latest Data Sheet revision before starting any designs. SEEQ Data Sheets are now on the Web, at .lsilogic.. This document is an LSI Logic document. Any reference to SEEQ Technology should be considered LSI Logic. s Low Power CMOS Technology with Single 5V Rev. 1 Specifications s patible with 8003 ELDC® , 8005 Advanced EDLC s Manchester Data Encoding/Decoding and Receiver Clock Recovery with Phase Locked Loop (PLL) s Receiver and Collision Squelch Circuit and Noise Rejection Filter s Differential TRANSMIT Cable Driver s Loopback Capability for Diagnostics and Isolation s Fail-Safe Watchdog Timer Circuit to Prevent Continuous Transmission s 20 MHz Crystal Oscillator s Transceiver Interface High Voltage (16 V) Short Circuit Protection Supply s 20 pin DIP & PLCC Packages Description The SEEQ 8020 Manchester Code Converter chip provides the Manchester data encoding and decoding functions of the Ethernet Local Area Network physical layer. It interfaces to the SEEQ 8003 and 8005 Controllers and any standard Ethernet transceiver as defined by IEEE 802.3 and Ethernet Revision 1. Functional Block Diagram Tx EN Pin Configuration DUAL-IN LINE TOP VIEW MODE 1 GND LPBK/WDTD 1 2 3 4 5 6 7 8 9 10 20 19 18 17 V CC Tx+ Tx- Tx D Tx C Tx EN X1 X2 COLL+ COLL- WATCHDOG TIMER Rx+ Rx- CSN 16 15 14 13 12 11 Tx C ENCODER Tx D LPBK/ WDTD CSN X1 X2 Rx C Rx D DECODER MUX XTAL CLOCK CARRIER SENSE TRANSMIT Tx+ Tx- VCC VSS MODE 1 COLL Rx C Rx D VSS RECEIVE Rx+ Rx- PLASTIC LEADED CHIP CARRIER TOP VIEW LPBK/WDTD GND MODE 1 V CC Tx+ COLL 10MHz DETECTOR COLLISION COLL+ COLL- Rx+ Rx- 4 5 6 7 8 9 Rx D 18 Tx- 17 Tx D 16 Tx C 15 Tx EN 14...