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ML4658CQ Datasheet(PDF) 1 Page - Micro Linear Corporation |
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ML4658CQ Datasheet(HTML) 1 Page - Micro Linear Corporation |
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1 / 17 page  November 1998 ML4658 10BASE-T Transceiver 1 GENERAL DESCRIPTION The ML4658 10BASE-T Transceiver is a single chip cable line driver/receiver that provides all of the functionality required to implement both an internal and external IEEE 802.3 10BASE-T MAU. This part offers a standard IEEE 802.3 AU interface that allows it to directly connect to industry standard manchester encoder/decoder chips or to an AUI cable. The ML4658 requires a minimal number of external components, and is compliant to the IEEE 802.3 10BASE-T standard. The differential current driven transmitter offers superior performance because of its highly symetrical switching. This results in low RFI noise and low jitter. The Transceiver easily interfaces to 100 Ω unshielded twisted pair cable, 150 Ω shielded twisted pair cable, or a range of other characteristic impedances by simply changing one external resistor. Jabber, Link Test, and SQE Test are fully integrated onto the chip with enable/disable options. A polarity detection status pin, which can drive an LED, is provided for receive data, and the ML4658 offers automatic polarity correction. BLOCK DIAGRAM FEATURES s Complete implementation of IEEE 802.3 10BASE-T Medium Attachment Unit (MAU) s Incorporates an AU interface for use in an external MAU or internal MAU s Single 5V supply ±10% s No crystal or clock input s Current Driven Output for low RFI noise and low jitter s Capable of driving 100 Ω unshielded twisted pair cable or 150 Ω shielded twisted pair cable s Polarity detect status pin capable of driving an LED s Automatic Polarity Correction s On-chip Jabber logic, Link Test, and SQE test with enable/disable option s Provides six network status LED ouput pins TRANSMIT SQUELCH AUI DRIVER AUI DRIVER SQE 10MHz GATED OSCILLATOR LINK PULSE PRE-EQUALIZED TRANSMIT DRIVER JABBER RECEIVE SQUELCH LINE RECEIVER AUTOMATIC POLARITY CORRECTION LINK TEST RECEIVE LOGIC LED DRIVERS 5V RTSET TxTP+ TxTP– TxCAP0 TxCAP1 SQEN/LTD/JABD AUI RECEIVER Tx+ Tx– COL+ COL– LOOPBACK MUX Rx+ Rx– GND RRSET VCC (5V) 5V CLSN JAB RCV LTF XMT POLRD Tx Rx RxTP+ RxTP– BIAS |
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