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ML4665CQ 데이터시트(PDF) 1 Page - Micro Linear Corporation |
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ML4665CQ 데이터시트(HTML) 1 Page - Micro Linear Corporation |
1 / 13 page March 1997 ML4665 Low Cost Single Chip 10BASE-FL Transceiver GENERAL DESCRIPTION The ML4665 is a low power, low cost, single chip 10BASE-FL transceiver. The ML4665 contains a fiber optic data quantizer and an LED output driver for direct connection to an optical module(s). The ML4665 offers a standard IEEE 802.3 AU interface that allows it to be directly connected to industry standard manchester encoder/decoder chips or an AUI connector. The ML4665 provides a highly integrated solution that requires a minimal number of external components. The transmitter offers a 100mA maximum current drive output that directly drives a fiber optic LED transmitter. The 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 ML4665 is a lower cost version of the industry standard ML4663. To achieve lower cost, the ML4665 eliminates some functionality (as described below) and is packaged in a 20-lead PLCC package. FEATURES s Lower cost single chip solution for 10BASE-FL internal or external Medium Attachment Units (MAUs) s Incorporates an AU interface s Highly stable data quantizer with 55dB input dynamic range s Input sensitivity as low as 2mVP-P s 100mA maximum current driven fiber optic LED driver for accurate launch power s Single +5 volt supply s No crystal or clock required s Link monitor LED indicator 1 BLOCK DIAGRAM AUI RECEIVER Tx SQUELCH AUI DRIVER AUI DRIVER 10MHz GATED OSCILLATOR LOOPBACK MUX JABBER RECEIVE SQUELCH LINK DETECT VREF FIBER OPTIC LED DRIVER 1MHz IDLE SIGNAL COL GND VCC (+5V) +5V AGND LBDIS CTIMER RRSET Tx Rx BIAS VCCTx (+5V) +5V RTSET Tx+ Tx– COL+ COL– Rx+ Rx– AVCC TxOUT LMON VIN+ VDC VIN- ∫ CMP AMP 2 3 4 5 8 7 14 6 10 1 17 15 16 18 19 11 13 20 9 12 |
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