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ML6672 Datasheet(PDF) 2 Page - Micro Linear Corporation |
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ML6672 Datasheet(HTML) 2 Page - Micro Linear Corporation |
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2 / 8 page  ML6672 2 PIN CONFIGURATION NAME FUNCTION NAME FUNCTION TXIN+, TXIN– These differential ECL100K compatible inputs receive NRZ data from the PHY for transmission. TPOUT+, Outputs from the NRZ buffer drive these TPOUT– differential current outputs. The transmitter filter/transformer module connects the media to these pins. LPBK This TTL input enables transmitter- Receiver loopback internally when asserted low. TXOFF This TTL input forces the NRZ buffer to a quiet state when asserted low. RTSET1, An external 1% resistor connected RTSET2 between these pins controls the transmitter output current amplitude. IOUT = 64 x 1.25V/RTSET TVCCA, Separate analog and digital TVCCD transmitter power supply pins help to isolate sensitive circuitry from noise generating digital functions. Both supplies are nominally +5 volts. TGNDA, Analog and digital transmitter grounds TGNDD provide separate return paths for clean and noisy signals. SD+, SD– These differential ECL100K compatible outputs indicate the presence of a data signal with an amplitude exceeding a preset threshold. TPIN+, TPIN– NRZ encoded data from the receiver filter/ transformer module enters the Receiver through these pins. PIN DESCRIPTION RXOUT+, Differential ECL100K compatible outputs RXOUT– provide NRZ encoded data to the PHY. CAP1, CAP2 Two external capacitors connected to these pins sets the time constant for the adaptation in the equalizer loop as well as for signal detect response. RRSET1, Internal time constants controlling the RRSET2 equalizer’s transfer function are set by an external resistor connected across these pins. CMREF This pin provides a DC common mode reference point for the receiver inputs. RVCCA, Analog and digital supply pins are RVCCD separated to isolate clean and noisy circuit functions. Both supplies are nominally +5 volts. RGND Receiver ground. RSET1, RSET2 An external 5k W resistor across these pins sets up an internal reference current. RTH1, RTH2 An external resistor connected across these pins sets the internal levels for equalization as well as signal detect. This resistor allows compensation for transmit and magnetics variations. RTH should be set to match the peak-to-peak transmit amplitude. VAMP = 16 x 1.25 x RTH/RSET where VAMP is the peak-to-peak amplitude of the transmit output with zero length cable. ML6672 32-Pin PLCC (Q32) ML6672 32-Pin TQFP (H32-7) 5 6 7 8 9 10 11 12 13 29 28 27 26 25 24 23 22 21 14 15 16 17 18 19 20 4 3 2 1 32 31 30 RXOUT+ RVCCD SD– SD+ N/C TGNDD LPBK TXOFF N/C RRSET1 RRSET2 RSET1 RSET2 RGND RTH1 RTH2 TVCCA TGNDA 1 2 3 4 5 6 7 8 24 23 22 21 20 19 18 17 9 10 11 121314 15 16 32 31 30 29 28 27 26 25 TPOUT– TPOUT+ RTSET2 RTSET1 TVCCD TXIN– TXIN+ N/C RRSET1 TPIN– TPIN+ CMREF CAP2 CAP1 RVCCA RXOUT– |
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