DP83910A DP83910A CMOS SNI Serial Network Interface Literature Number: SNLS386 DP83910A CMOS SNI
Serial Network Interface
General Description
The DP83910A CMOS Serial Network Interface (SNI) is a
direct-pin equivalent of the bipolar DP8391 SNI and provides the Manchester data encoding and decoding functions for IEEE 802.3 Ethernet/Thin-Ethernet type local area
networks. The SNI interfaces the DP8390 Network Interface
Controller (NIC) to the DP8392 CTI or an Ethernet transceiver cable. When transmitting, the SNI converts non-return-tozero (NRZ) data from the controller into Manchester data
and sends the converted data differentially to the transceiver. Conversely, when receiving, a Phase Lock Loop decodes the 10 Mbit/s data from the transceiver into NRZ
data for the controller.
The DP83910A operates in conjunction with the DP8392
Coaxial Transceiver Interface (CTI) and the DP8390 Network Interface Controller (NIC) to form a three-chip set that
implements a complete IEEE 802.3 compatible network as
shown below. The DP83910A is a functionally complete
Manchester encoder/decoder including a balanced driver
and receiver, on-board crystal oscillator, collision signal
translator, and a diagnostic loopback feature. The DP83910A, fabricated CMOS, typically consumes less than
70 mA of current. However, as a result of being CMOS, the
DP83910A’s differential signals must be isolated in both
Ethernet and thin wire Ethernet. Features
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