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Zakładka z wyszukiwarką danych komponentów |
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Zakładka z wyszukiwarką danych komponentów |
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ML4664 Arkusz danych(PDF) 1 Page - Micro Linear Corporation |
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ML4664 Arkusz danych(HTML) 1 Page - Micro Linear Corporation |
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1 / 16 page  July 2000 ML4664 */ML4669* 10BASE-FL to 10BASE-T Converter GENERAL DESCRIPTION The fully pin-compatible ML4664/ML4669 pair provide conversion from 10BASE-T copper media to 10BASE-FL fiber media in a single chip. They are compliant with Ethernet IEEE 802.3 10BASE-T and 10BASE-FL standards. The ML4664/69 uses a single 5V supply, and requires no crystal or clock. Their 10BASE-FL transmitter offers a current drive output that directly drives a fiber optic LED transmitter. Their receiver offers a highly stable fiber optic data quantizer capable of accepting input signals as low as 2mVP-P with a 55dB dynamic range. The 10BASE-T portion of the pair contains current driven transmitter outputs that offer superior performance because their switching is highly symmetric, resulting in lowered RFI noise and jitter. By changing one external resistor the pair easily interfaces to 100 W unshielded twisted pair, 150 W shielded twisted pair, or a range of other characteristic impedances. The ML4664 does not pass along disconnect information, while the ML4669 does. A loss of light at the optical inputs does not stop link pulses from being sent at the twisted pair transmitter in the ML4664, but in the ML4669 the link pulses stop. Also, a loss of link at the twisted pair inputs will not stop the optical transmitter from sending idle in the ML4664, but the ML4669 stops sending idle. * Some Packages Are Obsolete FEATURES s Full duplex operation s Five network status LED outputs s Industrial temperature option 10BASE-FL FEATURES: s Highly stable data quantizer with 55dB input dynamic range s Input sensitivity as low as 2mVP-P s Up to 100mA maximum current driven fiber optic LED output for accurate launch power (PLCC package) 10BASE-T FEATURES: s Current driven output for low RFI noise and low jitter s Drives 100 W unshielded or 150W shielded twisted pair s Polarity detect status pin capable of driving an LED s Automatic polarity correction s On-chip link test with enable/disable option 1 BLOCK DIAGRAM LINK PULSE CHECK RX SQUELCH TP POLARITY CORRECT LINK PULSE GENERATOR TP TX RX SQUELCH TP THRESHOLD GENERATOR QUANTIZER OP TX TPOUT 2 2 TPIN 2 RTSETTP TxCAP0 TxCAP1 LMON (LOW LIGHT) VDC CTIMER OPIN OPOUT OPVCC RTSETOP RRSET POLDIS LTF TPLED OPLED IDLE GENERATOR |
Podobny numer części - ML4664 |
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Podobny opis - ML4664 |
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