DP83901A

Features:

Compatible with IEEE 8023 10BASE5 10BASE2 10BASE-T
Dual 16-byte DMA channels
16-byte internal FIFO
Network statistics storage
Supports physical multicast and broadcast address filtering
10 Mbitsec Manchester encoding and decoding plus clock recovery
No external precision components required
Efficient buffer management implementation
Transmitter can be selected for half or full step mode
Integrated squelch on receive and collision pairs
3 levels of loopback supported
Utilizes independent system and network clocks
Lock Time 5 bits typical
Decodes Manchester data with up to 18 ns jitter


Pinout




Specifications

SupplyVoltage(V_CC) .....................................................-0.5Vto +7.0V
DCInputVoltage(V_IN) .............................................-0.5VtoV_CC +0.5V
DCOutputVoltage(V_OUT)........................................ -0.5VtoV_CC +0.5V
StorageTemperatureRange(T_STG)............................. -65to +150
PowerDissipation(P_D)........................................................... 800mW
LeadTemp(T_L)(Soldering10sec)............................................... 260
ESDRating(R_ZAP 1.5kC_ZAP 120pF)............................................ 1.5kV


Description

The DP83901A Serial Network Interface Controller (SNIC) is a microCMOS VLSI device designed for easy implementa- tion of CSMACD local area networks These include Ether- net (10BASE5) Thin Ethernet (10BASE2) and Twisted-pair Ethernet (10BASE-T) The overall DP83901A solution provides the Media Access Control (MAC) and Encode-Decode (ENDEC) functions in accordance with the IEEE 8023 stan-dard

The integrated ENDEC module allows Manchester encod- ing and decoding via a differential transceiver and phase lock loop at 10 Mbitsec Also included is a collision detect translator and diagnostic loopback capability (Continued)

The MAC function (NIC) provides simple and efficient pack-et transmission and reception control by means of unique dual DMA channels and an internal FIFO Bus arbitration and memory control logic are integrated to reduce board cost and area overheads

DP83901A used in conjunction with the DP8392 Coaxial Trans- ceiverInterface(CTI)providesacomprehensive2chipsolu- tion for IEEE 8023 networks and is designed for easy inter- face to the latest 10BASE-T transceivers

Due to the inherent constraints of CMOS processing isola- tion is required at the differential signal interfaces for 10BASE5 and 10BASE2 applications Capacitive or induc- tive isolation may be used