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ML2653CQ Datasheet(PDF) 3 Page - Micro Linear Corporation |
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ML2653CQ Datasheet(HTML) 3 Page - Micro Linear Corporation |
3 / 23 page 3 ML2652/ML2653 PIN DESCRIPTION NAME FUNCTION VCC Positive supply. +5V GND Ground. 0 volts. All inputs and outputs referenced to this point. CLK Clock input. There must be either a 20 MHz crystal or a 20 MHz clock between this pin and GND. Tx+ Transmit positive twisted pair output. This output is a current source that drives the twisted pair cable through a pulse transformer. Tx– Transmit negative twisted pair output. This output is a current source that drives the twisted pair cable through a pulse transformer. Rx+ Receive positive twisted pair input. This input receives data from the twisted pair cable through a pulse transformer. Rx– Receive negative twisted pair input. This input receives data from the twisted pair cable through a pulse transformer. DO+ AUI positive transmit output. AUI transmit data output to optional external transceiver. DO– AUI negative transmit output. AUI transmit data output to optional external transceiver. DI+ AUI positive receive data input from optional external transceiver. NAME FUNCTION DI– AUI negative receive data input from optional external transceiver. CI+ AUI positive collision input from optional external transceiver. CI– AUI negative collision input from optional external transceiver. RTX Transmit current set. An external resistor between this pin and GND programs the absolute value of output current on Tx±. TxC Transmit clock output. Digital output which clocks the transmit data (TxD) into the device from the controller. TxD Transmit data input. Digital input which contains transmit data from the controller. TxE Transmit enable input. Digital input from the controller that indicates when the transmit data (TxD) is valid. COL Collision output Digital output to the controller which indicates when a collision condition is present. RxC Receive clock output. Digital output which clocks receive data (RxD) from the device into the controller. ML2653 BLOCK DIAGRAM TxE TxD LPBK RxC RxE RxD CLK CONTROLLER INTERFACE MANCHESTER ENCODER MANCHESTER DECODER LEDS JABBER DETECT LINK PULSE XMT WAVEFORM GEN & LPF COLLISION DETECT RECEIVER CURRENT DRIVEN XMT OUTPUT DRIVER RECEIVE LPF OSC XMT/RCV RPOL LTP CS0 CS1 CS2 FD VCC VCC GND GND RTX Tx+ Tx– Rx+ Rx– RSL DATA ENABLE COLLISION DATA ENABLE TxC COL |
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