GN2405AINE3

GN2405 & GN2406 Quad 10Gb/s CDR with Transmit De-Emphasis Features: General Description • Automatic locking from 9.95Gb/s to 11.3Gb/s • Automatic rate detect for quarter rate (2.5Gb/s) and half rate (5Gb/s) modes • Re-timer bypass up to 11.3Gb/s • Low output jitter • High input jitter tolerance, better than 0.7 UI • No reference clock required • Programmable output, with 400mV to 800mV differential output voltage range • Independent channel operation • De-emphasis to compensate up to 28dB of loss • I2C control interface • Automatically loads configuration data from E2PROM • Loss of signal detect with adjustable threshold • Low power dissipation • Single 3.3V supply • 7x7mm, 48-pin QFN package • GN2405 and GN2406 are fully pin compatible The GN2405 and GN2406 are fully pin compatible quad repeater/re-timer devices designed to enhance the reach and robustness of high speed serial links by compensating for transmission losses and re-setting the crosstalk and jitter budget. The GN2405 and GN2406 have different input stages, as shown in the figures below. The GN2405 and GN2406 feature Gennum’s proven reference-free CDR architecture which simplifies system design and reduces overall cost. Each channel supports independent locking to data rates from 9.95 - 11.3Gb/s. To enable backward compatibility with legacy data rates, half rate (5Gb/s) and quarter rate (2.5Gb/s) operation is also supported. Other rates can be supported using the re-timer bypass feature. The GN2405 and GN2406 can be used in multiple applications. The GN2406’s high sensitivity limiting amplifiers removes the need for standalone limiting amplifiers in optical module applications. The GN2405 can be used as a transmit CDR in module applications as its input equalizer can compensate for trace and connector losses. A combination of the output de-emphasis and limiting amplifier can compensate for up to 28dB of loss. Combining these features with the low output jitter of the devices will result in extremely robust high-speed backplane links. Applications • Optical modules and active copper cable assemblies for: - Infiniband® SDR/DDR/QDR - 40Gb/s and 100Gb/s Ethernet • Re-timer on line card for: - QSFP modules - Parallel optical modules - SFP+ modules Please see reverse side for a description of some of the applications enabled by Gennum’s combination of flexible devices. • 10Gb/s serial backplane retimer IN0P IN0N IN1P IN1N IN2P IN3N IN3P IN3N IN0P LIMITING AMP IN0N LIMITING CDR AMP DRIVER CDR OUT0P DRIVER OUT0N OUT0P IN0P IN1P LIMITING AMP IN1N LIMITING CDR AMP DRIVER CDR OUT1P DRIVER OUT1N OUT1P IN1P IN2P LIMITING AMP IN3N LIMITING CDR AMP DRIVER CDR OUT2P DRIVER OUT2N OUT2P IN2P IN3P LIMITING AMP IN3N LIMITING CDR AMP DRIVER CDR OUT3P DRIVER OUT3N OUT3P IN3P LA Controls CDR LA Controls Controls 2 Driver CDR Controls Controls OUT0N IN0N OUT1N IN1N OUT2N IN3N OUT3N IN3N IN0P EQ IN0N EQ CDR DRIVER CDR OUT0P DRIVER OUT0N OUT0P IN1P EQ IN1N CDR DRIVER CDR OUT1P DRIVER OUT1N OUT1P EQ IN2P EQ IN3N EQ CDR DRIVER CDR OUT2P DRIVER OUT2N OUT2P IN3P EQ IN3N CDR DRIVER CDR OUT3P DRIVER OUT3N OUT3P EQ CDR EQ Controls Driver CDR Controls Controls Driver Controls EQ Controls 2 I C 2 GN2406: Quad 10Gb/s CDR with limiting amplifier TX 4 TX ASIC 4 LINE CARD OPTICAL MODULE OPTICAL MODULE OPTICAL MODULE OPTICAL MODULE ASIC Driver Controls LINE CARD RX RX (10Gb/s x4) Laser Driver GN2405 (x4) LaserLaser Diode Driver (x4) (x4) OUT3N I C (10Gb/s x4) GN2405 OUT2N GN2405: Quad 10Gb/s CDR with input equalizer LINE CARD GN24 LINE CARD Learn More ABOUT the GENNUM 06 AT www.gennum.com (10Gb/s x4) OUT1N 2 I C I C OUT0N 4 Laser Diode (x4) 4 Photo Diode (x4) Photo TIA Diode (x4) (x4) TIA GN2406 (x4) 4 (10Gb/s x4) GN2406 ASIC 4 ASIC (x4) (x4) RX (x4) TX (10Gb/s x4) (10Gb/s x4) LINE CARD Copper Cable Applications The GN2405 and GN2406 are IN0P ideally suited as signal LIMITING AMP conditioners for active copper IN0N cable assemblies supporting Infiniband QDR and 40GbE rates. The de-emphasis will compensate for the loss in IN1P LIMITING AMP the cable and the CDR willIN1N reset the jitter and crosstalk budget. TX CDR LINE CARD ACTIVE COPPER QSFP MODULE DRIVER (10Gb/s x4) 4 DRIVER IN3P IN0N 4 GN2406 CDR LA Controls ASIC EQ IN1N CDR 4 GN2405 DRIVER OUT2P IN2P OUT2N IN3N De-emphasis High DRIVER Re-timer CDR enables ASIC resets OUT3N sensitivity to be placed crosstalk, receiver far from Driver Controls jitter and recovers CDR Controls module skew budget signal IN3P IN3N CDR De-emphasis EQ to compensate cable loss EQ Controls Re-timer CDR resets crosstalk, jitterCDRbudget Controls 2 2 I C The GN2406’s quad limiting amplifier and CDR combination is optimal as a receive CDR in optical modules. The GN2405’s input equalizer will compensate for connector and trace loss and can be used as the transmit CDR. OUT2P DRIVER Equalizer to compensate for trace Driver Controls and connector losses OPTICAL MODULE OPTICAL MODULE GN2405 4 Photo Diode (x4) TIA (x4) GN2406 GN2406 TIA (x4) Photo Diode (x4) 4 Laser Diode (x4) Laser Driver (x4) GN2405 RX 4 ASIC 4 TX (10Gb/s x4) Re-timer resets crosstalk, jitter budget High sensitivity receiver recovers signal Re-timer resets crosstalk, jitter budget LINE CARD TX ACTIVE COPPER QSFP MODULE 4 Re-timer resets crosstalk, jitter budget 4 TX (10Gb/s x4) RX (10Gb/s x4) GN2405 4 GN2406 4 RX 4 (10Gb/s x4) 4 GN2406 LINE CARD ASIC Equalizer to compensate for trace and connector losses LINE CARD ACTIVE COPPER QSFP MODULE (10Gb/s x4) Backplane Applications The GN2405 and GN2406 can be used as backplane extenders in Infiniband QDR, 10GbE or any system running 10G serial over the backplane. The retiming capability and high input jitter tolerance of the devices improve crosstalk performance, which is a significant issue in dense, high speed backplanes. OUT3N RX Laser Diode (x4) (10Gb/s x4) De-emphasis enables ASIC to be placed far from module OUT3P (10Gb/s x4) Laser Driver (x4) ASIC 4 OUT2N DRIVER (10Gb/s x4) 4 OUT1N LINE CARD LINE CARD TX OUT1P DRIVER (10Gb/s x4) EQ I C Optical module Applications OUT0N TX OUT3P LIMITING AMP OUT0P DRIVER 4 GN2406 IN1P 4 OUT1N RX (10Gb/s CDR x4) EQ RX LIMITING AMP IN3N OUT0N OUT1P 4 (10Gb/s x4) IN2P IN3N IN0P GN2405 ASIC CDR ACTIVE COPPER QSFP MODULE OUT0P ASIC BACKPLANE GN2405 LINE CARD RX 4 (10Gb/s x4) TX GN2405 4 4 (10Gb/s x4)GN2406 4 GN2406 4 4 GN2405 4 ASIC ASIC 4 RX TX (10Gb/s x4) Higher input jitter tolerance than ASIC for robust system performance Learn More: url: www.gennum.com/cdr Email: info@gennum.com Phone: (905) 632-2996 © 2009 Gennum Corporation ® ™ Trademarks of Gennum Corporation except where otherwise noted. Printed in Canada. (10Gb/s x4) High sensitivity receiver recovers signal Transmit de-emphasis to compensate for up to 40 inches of trace Equalizer to compensate for trace and connector losses