The Gennum® GN2405A is a quad repeater/re-timer device 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 GN2405A features 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 - 11.3Gbps. To enable backward compatibility with legacy data rates, half rate (5Gbps) and quarter rate (2.5Gbps) operation is also supported. Other rates can be supported using the re-timer bypass feature.
The GN2405A can be used in multiple applications. It can be used as a CDR in parallel optical modules or in active copper cable assemblies. It’s flexible de-emphasis driver and jitter performance are ideal for use as a line card or backplane repeater.
- Automatic locking from 9.95Gbps to 11.3Gbps
- Automatic rate detect for quarter rate (2.5Gbps) and half rate (5Gbps) modes
- Re-timer bypass up to 11.3Gbps
- 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
- GN2405A and GN2406 are fully pin compatible
- Optical modules and active copper cable assemblies for:
- Infiniband® SDR/DDR/QDR
- 40Gbps and 100Gbps Ethernet
- Re-timer on line card for:
- QSFP modules
- Parallel optical modules
- SFP+ modules
- 10Gbps serial backplane retimer
- 48-pin QFN
Explore a wealth of downloadable resources and datasheets to assist with prototyping and production.
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