Overview
| Information | |
|---|---|
| Integrated Driver | VCSEL |
| Module Capacity | 400G |
| Electrical I/O per Lane | 8x50G |
| Optical I/O per Lane | 4x100G |
| Gearbox | ✔ |
| Reverse-Gearbox | |
| Reach Profiles | VR4/SR4 |
| Form Factor | QSFP-DD, OSFP |
| Cable Type | Optical Modules, AEC/ACC, AOC |
| Package | FC-FBGA |
| X-Y Dimension (mm) | 12x13 |
The MxL93644A is a highly integrated PAM4 DSP SoC that enables 400Gbps optical interconnects using 100Gbps over a single optical wavelength (100G/λ).
The device has a high-speed electrical interface with four transmit (Tx) and receive (Rx) input/output (I/O) that connect electrically through a module connector to the host ASIC.
The device also has a high-speed optical side interface that has four Tx and Rx I/O that connect through the optical components to optical fibers.
The electrical interface supports 53.125Gbps PAM4 signaling per lane over C2M host channels.
The optical interface supports 106.25Gbps PAM4 signaling per wavelength for DR, FR, and LR applications.
The device supports DSP functions including line side Tx digital pre-distortion (DPD), transmit pre-emphasis (Tx FIR), and receive feed-forward equalization (Rx FFE).
The MxL93644A, in a 12mm × 13mm package, includes integrated drivers with DC bias and modulation for vertical-cavity surface-emitting laser (VCSEL) based implementations. It offers exceptional signal integrity for signals in a compact footprint suitable for next generation optical module form-factors.
400G gearbox capacity that enables 400G DR4, FR4, LR4, VR4/SR4
400G to 100G break-out mode
Tx equalization includes pre-emphasis, digital pre-distortion, and reflection cancellation
Rx equalization includes CTLE, multi-tap FFE and reflection cancellation
Supports host channels with Nyquist loss in excess of 20dB
Integrated crystal oscillator eliminates the need for a costly reference clock source
Small package size to enable the QSFP-DD space requirements
Mission mode BER monitoring
SNR/Histogram reporting for each receiver on both electrical and optical interfaces
Diagnostic loop-back, test pattern generation, and error checking
SPI and I2C slave interface to communicate to module MCU
SPI master for flash memory interface
I2C master interface for TIA direct control
Embedded CPU for real-time control
Squelch function when Loss-of-Signal (LOS) or Loss-of-Lock (LOL) is detected
QSFP-DD optical modules
OSFP optical modules
QSFP-DD AEC/ACC and AOC
OSFP AEC/ACC and AOC
Documentation & Design Tools
| Type | Title | Version | Date | File Size |
|---|---|---|---|---|
| Product Flyers | High-Speed Interconnect Products | R02 | December 2025 | 1.1 MB |
Parts & Purchasing
| Part Number | Min Temp | Max Temp | Status |
|---|---|---|---|
| MxL93644A-PV-T | -5 | 85 | Active |
Active - the part is released for sale, standard product.
EOL (End of Life) - the part is no longer being manufactured, there may or may not be inventory still in stock.
CF (Contact Factory) - the part is still active but customers should check with the factory for availability. Longer lead-times may apply.
PRE (Pre-introduction) - the part has not been introduced or the part number is an early version available for sample only.
OBS (Obsolete) - the part is no longer being manufactured and may not be ordered.
NRND (Not Recommended for New Designs) - the part is not recommended for new designs.
