ML6680CQ Micro Linear, ML6680CQ Datasheet
ML6680CQ
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ML6680CQ Summary of contents
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GENERAL DESCRIPTION The ML6680 is a single-chip conversion between Token Ring ISO/IEC8802-5 copper-based media and Token Ring ISO/IEC8802-5 fiber-based media. The ML6680 fiber-optic interface contains a data quantizer, circuitry for fiber optic key signal generation and recognition, pin-selectable signal switching, ...
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ML6680 PIN CONFIGURATION 2 ML6680 28-Pin PLCC (Q28 TPINP 5 25 TPINN 6 24 PHTM1 7 23 PHTM2 8 22 GND2 9 21 TPOUTP 10 20 TPOUTN ...
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PIN DESCRIPTION PIN# NAME FUNCTION 1, 28 XTAL1, Crystal inputs. A 32.768kHz watch XTAL2 crystal connected between these pins provides timing for the fiber optic insertion key signal. An external clock can be used to drive XTAL1 while grounding XTAL2. ...
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ML6680 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 .................... –0.3 to ...
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ELECTRICAL CHARACTERISTICS SYMBOL PARAMETER PHANTOM DRIVE OUTPUTS: PHTM1, PHTM2 R No Fault Phantom Load NF Resistance R Short Circuit Phantom Load SC Resistance R Open Circuit Phantom Load OC Resistance V Phantom Output High Voltage OHP I Phantom Short Circuit ...
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ML6680 AC CHARACTERISTICS Over full range of operating conditions unless otherwise specified. (Note 1) SYMBOL PARAMETER CLOCK REFERENCE: XTAL1 f Reference Clock Frequency XO D Reference Clock Duty Cycle XO TWISTED PAIR RECEIVER: TPINP, TPINN t Input Pulse Width Threshold ...
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AC CHARACTERISTICS (continued) SYMBOL PARAMETER INSERTION KEY ECHO AND BYPASS KEY RECOGNITION (Fig. 1) T_ECHO Time since starting insertion key generation until receiving the insertion key echo. T_E1Key Key Echo From T_K1 T_E2Key Key Echo From T_K2 T_E3Key Key Echo ...
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ML6680 FUNCTIONAL DESCRIPTION Fiber Optic LED Driver The output stage of the transmitter is a current mode switch which develops the output light by sinking current from OPVCC through the LED into the OPOUT pin. Once the current requirement for ...
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Modes of Operation Four configurations are possible with the ML6680, as follows: 1.Standard Media Converter: Senses ISO/IEC8802-5 phantom power and generates ISO/IEC8802-5 fiberoptic insertion or bypass requests. 2.Concentrator Media Converter: Recognizes the ISO/ IEC8802-5 fiberoptic insertion or bypass requests and ...
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ML6680 32KHz 10 OPINP OPVCC QVCC OPINOK XTAL2 RTSETOP XTAL1 INSERTED VCC2 VCC1 EQA RTSETTP EQB TPINOK 237 R11 237 R12 Figure 2. ML6680 Configurations 1 and 2 ...
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CLOCK FROM THE UPSTREAM LOBE PORT IN CONFIG. 3 FROM THE UPSTREAM RING OUT PORT IN CINP CONFIG. 4 25nF CINN C10 R7 49.9 49.9 TO THE DOWNSTREAM RING IN PORT IN CONFIG. 3 COUTP TO THE DOWNSTREAM LOBE COUTN ...
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... ORDERING INFORMATION PART NUMBER ML6680CQ © 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; 2619299. Other patents are pending. ...