ML4668CQ Micro Linear, ML4668CQ Datasheet
ML4668CQ
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ML4668CQ Summary of contents
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Low Power Single Chip 10BASE-FL Transceiver GENERAL DESCRIPTION The ML4668 single-chip 10BASE-FL transceiver is a low power, high output current, plug-compatible version of the industry standard ML4663. The ML4668 offers a standard IEEE 802.3 AU interface that allows it to ...
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ML4668 PIN CONNECTION 2 ML4668 28-Pin PLCC (Q28 SQEN/JABD Rx– LBDIS Tx Tx– ...
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PIN DESCRIPTION PIN NAME FUNCTION CLSN 1 Indicates that a collision is taking place. Active low LED driver, open collector. Event is extended with internal timer for visibility. 2 COL+ Gated 10MHz oscillation used to 3 COL– indicate a collision, ...
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ML4668 ABSOLUTE MAXIMUM RATINGS Absolute maximum ratings are those values beyond which the device could be permanently damaged. Absolute maximum ratings are stress ratings only and functional device operation is not implied. Power Supply Voltage Range V ..................................................... GND –0.3 ...
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AC ELECTRICAL CHARACTERISTICS SYMBOL Transmit F Transmit Idle Frequency TXIDF P Transmit Idle duty Cycle TXDC t Transmit Turn-On Pulse Width TXNPW t Transmit Turn-On Delay TXODY t Transmit loopback Start-up Delay TXLP t Transmit Turn-Off Pulse Width TXFPW t ...
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ML4668 6 Figure 1. ML4668 Schematic Diagram ...
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SYSTEM DESCRIPTION Figure 1 shows a schematic diagram of the ML4668 in an internal or external 10BASE-FL MAU. On one side of the transceiver is the AU interface and the other is the fiber optic interface. The AU interface is ...
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ML4668 V CC RTSET = 560 OUT TxOUT Figure 3. Converting Optical LED Driver Output to Differential ECL. RECEPTION The input to the transceiver comes from a fiber optic receiver (Figure 1). At ...
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Since the amplifier has a differential input, two capacitors of equal value are required. If the signal driving the input is single ended, one of the coupling capacitors can be tied to AV (Figure 1). CC The internal amplifier has ...
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ML4668 TIMING DIAGRAMS t TXNPW Tx+ VALID Tx– t TXODY TxOUT IDLE t TXLP Rx+ Rx– – Rx+ Rx– Tx+ Tx– – CPSQE COL+ COL– Rx+ Tx Rx– ...
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TIMING DIAGRAMS – IN Tx+ Tx– t CPSQE COL+ COL– – IN Tx+ VALID Tx– t SQEXR COL+ CS0 COL– Rx Rx– Tx+ Tx– VALID V – ...
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ML4668 TIMING DIAGRAMS COL+ COL– TxOUT COL+ COL– Tx+ Tx – TxOUT COL+ COL– CLF Figure 12. Collision Timing VALID DATA t SQEDY Figure 13. SQE Timing VALID DATA t JAD VALID DATA t JSQE CS0 Figure ...
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Tx+ Tx– t LED XMT Figure 15. LED Timing – IN RCV Figure 16. LED Timing – IN LMON t LLPH Figure 17. LED Timing t LED t LLCL ML4668 13 ...
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... ORDERING INFORMATION PART NUMBER ML4668CQ © Micro Linear 1997 is a registered trademark of Micro Linear Corporation Products described in this document may be covered by one or more of the following patents, U.S.: 4,897,611; 4,964,026; 5,027,116; 5,281,862; 5,283,483; 5,418,502; 5,508,570; 5,510,727; 5,523,940; 5,546,017; 5,559,470; 5,565,761; 5,592,128; 5,594,376; Japan: 2598946. Other patents are pending. ...