Scope
Network accessories are reviewed against the exact adapter, switch, appliance, chassis, or rack context.
Request preparation
Share the host device, accessory function, location or port, exact reference, required included parts, quantity, condition, and acceptable alternatives.
Technical parameters and selection boundaries
Published configurations differ by manufacturer and exact part number. These are selection dimensions, not one combined specification.
| Parameter | Documented example or choice | Verify for this request |
|---|---|---|
| Port adaptation | NVIDIA MAM1Q00A-QSA28 accepts an SFP28 module in a QSFP28 port. | The documented connection maps the first transmit/receive lane; lanes 2–4 are terminated. It is not a four-port breakout or a universal host speed converter. |
| Operating supply and adapter power | Operational supply is 3.135–3.465 V, nominal 3.3 V; listed maximum adapter consumption is 0.1 W. | The inserted module and host add their own power requirements. Absolute-maximum ratings are not normal operating targets. |
| Temperature suffix matters | The operational table specifies −10 to +85 °C case temperature for MAM1Q00A-QSA28_E. The memory map distinguishes a 70 °C maximum for the unsuffixed version. | Do not apply the extended-temperature rating to an unsuffixed adapter. Storage is separately listed as −40 to +85 °C. |
| Signal mode boundary | The memory map lists NRZ support and identifies 25 GBd PAM4 / HDR as unsupported. | Match the actual port mode, firmware and inserted module. Form-factor adaptation does not establish PAM4 compatibility. |
| Electrical impedance | The electrical table lists 90–110 Ω characteristic impedance, nominal 100 Ω. | This is an adapter interface specification, not a complete assembled-channel signal-integrity qualification. |
Standard configurations and project options
| Configuration area | Documented option | Project decision |
|---|---|---|
| Base or extended-temperature variant | Distinguish MAM1Q00A-QSA28 from the _E temperature variant by full label and procurement specification. | Preserve the suffix and product revision; do not treat these as an interchangeable generic QSFP accessory. |
| Inserted module and supported mode | Specify the SFP28 device, host port, firmware and required NRZ link mode. | Check the host support matrix and adapter detection; request a single-lane link test for the final configuration. |
Representative models and configurations
Examples illustrate real product variation. A listed manufacturer or model is not a statement of our stock, authorization, or confirmed availability.
| Manufacturer / series | Published configuration | Important scope |
|---|---|---|
| NVIDIA MAM1Q00A-QSA28 | QSFP28-to-SFP28 adapter; lane-one pass-through; table max power 0.1 W. | Model-specific evidence. Inserting an adapter does not ensure a host accepts every SFP28 module. |
Applications and procurement context
- Use a qualified port adapter when a compatible host must connect a supported single-lane SFP28 device. Identify mode, firmware, module and thermal variant; keep electrical loopback test modules and passive dust covers as different accessory types.
Compatibility, current supply, lead time, origin, and acceptance documents must be confirmed for the actual order.
