GN2405AINE3

Overview

The GN2405AINE3 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 resetting crosstalk and jitter budgets. It features Gennum’s reference-free CDR architecture, eliminating the need for a reference clock. Each channel supports independent locking to data rates from 9.95 Gbps to 11.3 Gbps, with backward compatibility for half-rate (5 Gbps) and quarter-rate (2.5 Gbps) modes via automatic rate detection. The device includes an input equalizer to compensate for trace and connector losses, programmable output swing ranging from 400 mV to 800 mV differential, and transmit de-emphasis capable of compensating up to 28 dB of loss.

Feature Summary

• Reference-free CDR architecture with automatic locking from 9.95 Gbps to 11.3 Gbps
• Input equalizer and transmit de-emphasis compensating up to 28 dB of loss
• High input jitter tolerance exceeding 0.7 UI
• Automatic rate detection for quarter-rate (2.5 Gbps) and half-rate (5 Gbps) modes

Applications

• Active copper cable assemblies supporting Infiniband QDR and 40GbE
• Transmit CDR in optical modules
• Serial backplane retimer for Infiniband QDR and 10GbE
• QSFP module signal conditioning

Procurement Notes

Verify the specific suffix 'INE3' against manufacturer documentation to confirm environmental compliance or package variations. Confirm pinout compatibility if substituting with other GN240x series devices, as the GN2405 and GN2406 are fully pin compatible but feature different input stages.

Selection Notes

Select the GN2405AINE3 when an input equalizer is required to compensate for trace and connector losses prior to the CDR stage, such as in transmit paths. Choose this over the GN2406 if the application does not require the integrated limiting amplifier found in the GN2406. Ensure the system design accommodates the single 3.3V supply requirement.

Part Context

The GN2405AINE3 belongs to the GN2405/GN2406 family of quad 10Gbps CDRs. While the GN2406 integrates limiting amplifiers suitable for receive paths, the GN2405 incorporates an input equalizer, making it distinctively suited for transmit applications where pre-equalization of signal integrity is necessary before clock and data recovery.

Replacement Considerations

The GN2406 is fully pin-compatible with the GN2405 but contains integrated limiting amplifiers instead of an input equalizer. Substitution requires verifying that the missing limiting amplifier or presence of the equalizer aligns with the specific circuit topology requirements.