Part Information Review and Verification
5:27
Searching web for: "Semtech LR1121IMLTRT official datasheet PDF"
Analyzing the PCB layout.
Analyzing the schematic.
Found 1 results.
Searching files for datasheets.
Fetching web page.
Found 1 results.
Searching for PDF links.
Running multiple web searches.
Found 1 results.
Found 1 results.
Fetching web page.
Found 1 results.
Running multiple web searches.
Found 1 results.
Found 1 results.
Running multiple web searches.
Found 1 results.
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Found 1 results.
Running multiple web searches.
Found 1 results.
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Found 1 results.
Looking for "What are the key LR1121 specifications, package, pin count, and any pin/function details available on this official page? Also identify whether the page includes a datasheet link or datasheet metadata." in lr1121
Looking for "Extract the LR1121 pin table, package info, and any device description or electrical key specs visible from this datasheet source. Focus on pin names, pin numbers, and descriptions." in LR1121_V01.html
Searching the project.
Searching for factual information.
Searching 3 domains.
Summarizing metadata needs.
Searching 3 domains.
Gathering asset details.
Searching fetch_url.
Looking for "Find the product description, package/package type, and pin count for LR1121IMLTRT." in PdIx6QpZ_oZmdRVW2iW.ciZPBKY8nZLQpybO9K0Bo.s
Clarifying datasheet details.
Search complete — 122 results across 5 domains.
Looking for "Extract the LR1121 datasheet title, package, pin table, and key specs from this datasheet URL. Confirm whether this is the official datasheet for LR1121IMLTRT." in PdIx6QpZ_oZmdRVW2iW.ciZPBKY8nZLQpybO9K0Bo.s
Deciding on citations.
Project metadata
| Field | Value |
|---|---|
| MPN | LR1121IMLTRT |
| Manufacturer | Semtech |
| Part Type | Integrated Circuits |
| Designator Prefix | U |
| Description | RF Transceiver LR1121 LoRa Connect Dual-band Wireless Transceiver |
| Package | QFN32 5 x 5 mm |
| Pin count | 32 signal pins + exposed pad |
| Footprint asset | QFN50P500X500X100-33N.kicad_mod |
| Symbol asset | LR1121IMLTRT_0_0 Symbol.svg |
| 3D model asset | LR1121IMLTRT.step |
Datasheet URL, so I did not add or overwrite a separate Datasheet property.Key specs confirmed
| Spec | Value |
|---|---|
| Device type | Ultra-low-power multi-band LoRa transceiver |
| Bands | 150 to 960 MHz, 2.4 GHz, 1.525 to 1.660 GHz, 1.9 to 2.1 GHz |
| Modulations | LoRa, (G)FSK, LR-FHSS, Sigfox on sub-GHz |
| Max TX power | +22 dBm sub-GHz, up to +11.5 dBm at 2.4 GHz |
| RX current | 5.4 mA |
| Sensitivity | -141 dBm |
| Crypto | AES-128 |
| Reference clocks | 32 MHz main crystal/TCXO, 32.768 kHz low-frequency clock |
- The project package matches the datasheet family/package: QFN32 5 x 5 mm.
- The footprint naming ending in 33N is consistent with a 32-pin QFN plus exposed pad.
- The layout contains the expected full pad set for the package, including the exposed pad.
- Most terminal names and pin numbers align with the datasheet:
- GPIO/DIO set
- RF pins
- power pins
- DNC pins
- crystal pins
Mismatches / issues to flag
| Area | Project | Datasheet | Status |
|---|---|---|---|
| Exposed pad numbering | GND__1 is pin 33 | Exposed pad listed as pin 0 / exposed ground pad | Mismatch |
| Reset pin naming | ~{RESET} | NRESET | Minor naming difference |
| Crystal pin type | XTA marked Input | special crystal/reference pin | Type may be too specific |
| Crystal pin type | XTB marked Passive | special crystal/reference pin | Type may be inconsistent |
| DC-DC switch pin type | DCC_SW marked Output | special switcher output / no simple I/O type in datasheet table | Review recommended |
- The digital I/O terminals look consistent.
- RF pin naming looks consistent.
- Power pins look consistent.
- DNC coverage looks consistent: the project includes all expected DNC positions.
- The main issue is the exposed pad representation: the project models it as a second ground terminal, but the numbering does not match the datasheet convention.
- Overall: the part project looks mostly correct.
- Main issue: the exposed pad ground terminal numbering should be reviewed.
- Minor cleanup items: align reset naming and consider normalizing the terminal types for the crystal and DC-DC switch pins.
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