Part Verification and Discrepancies

4:33

Verifying component details.

Extracting part details.

Getting datasheet and footprint info.

Gathering component details.

Accessing knowledge base.

Reviewing the bill of materials.

Analyzing the PCB layout.

Looking for "pin definitions table" in 2312201733_Espressif-Systems-ESP32-C3_C2838500.pdf

Looking for "pin layout or pin configuration" in 2312201733_Espressif-Systems-ESP32-C3_C2838500.pdf

Looking for "package information mechanical dimensions QFN-32 5x5" in 2312201733_Espressif-Systems-ESP32-C3_C2838500.pdf

Looking for "recommended PCB land pattern QFN32" in 2312201733_Espressif-Systems-ESP32-C3_C2838500.pdf

Looking for "exposed pad (EP) and thermal pad recommendations" in 2312201733_Espressif-Systems-ESP32-C3_C2838500.pdf

Looking for "absolute maximum ratings supply voltage VDD3P3" in 2312201733_Espressif-Systems-ESP32-C3_C2838500.pdf

Searching web for: "ESP32-C3FH4 datasheet variants package QFN32 5x5 pinout"

Found 1 results.

Analyzing the PCB layout.

Planning component verification and reporting.

Preparing verification table.

Here is a cross-check of the ESP32-C3 (QFN-32 5x5) part in this project against the Espressif datasheet and web references. I verified pins/pinout, footprint, and metadata, and I list discrepancies and recommendations at the end.

Summary verification table

Table

Item	Datasheet / Web reference	In project	Status / Notes
Device/variant	Family datasheet covers ESP32-C3, ESP32-C3FN4, ESP32-C3FH4 (all QFN32 5x5 EP; same pinout) [Datasheet], [Espressif docs]	Project title suggests “ESP32-C3FH4”, properties list MPN “ESP32-C3”	Variant not explicit; see discrepancies
Pin count	32 leads + exposed pad (EP) used as GND. Pin numbering CCW from Pin 1 (top view) [Datasheet: Fig 2-1]	33 pads present in footprint (32 perimeter + 1 EP)	Matches
Pin names/pinout	Full consolidated pin list: LNA_IN, VDD3P3 (x2), XTAL_32K_P, XTAL_32K_N, GPIO2, CHIP_EN, GPIO3, MTMS, MTDI, VDD3P3_RTC, MTCK, MTDO, GPIO8, GPIO9, GPIO10, VDD3P3_CPU, VDD_SPI, SPIHD, SPIWP, SPICS0, SPICLK, SPID, SPIQ, GPIO18, GPIO19, U0RXD, U0TXD, XTAL_N, XTAL_P, VDDA (x2), GND [Datasheet: pin table]	All 33 names present as pads in footprint (duplicates represented as VDDA and VDDA__1, VDD3P3 and VDD3P3__1)	Matches
Pin 1 indicator	Top-view CCW numbering from Pin 1, marker at corner [Datasheet]	Footprint contains pin-1 marker (silk circle) in payload	Matches
Package	QFN-32 (5×5 mm) with EP [Datasheet: Figure 5-1]	Footprint module name “QFN50P500X500X90-33N”	Matches type/size
Pitch	0.50 mm (QFN50P) (package family)	Footprint indicates 0.50 mm pitch (pad rows at ±2.45 mm; pad size 0.27×0.81)	Consistent; see land pattern note
Land pattern	Datasheet references “source file of recommended PCB land pattern” and hardware design guide [Datasheet: Packaging]	Footprint pads are 0.27×0.81 mm; EP = 3.7×3.7 mm; paste is tiled via 9 paste apertures; perimeter pad round-rects; pin-1 silk;	Looks consistent; numeric targets not explicitly listed in this PDF
Exposed pad/thermal	EP connected to GND; thermal considerations recommended [Datasheet]	EP present (pad 33). Footprint also includes an internal thermal via array (thru-hole pads 34–49) inside EP	Hardware support present; see connectivity note
Supply voltage	Input power pins allowed input voltage –0.3 to 3.6 V [Datasheet: Abs Max]	Project description shows “3V~3.6V”	Consistent with datasheet limit
Schematic symbol	Symbol should expose 32+1 pins with correct numbers/names	Schematic contains only 33 “Terminal” components; no MCU symbol instance or pin-numbered symbol	Missing symbol; see discrepancies
BOM presence	MCU IC should appear in BOM	BOM lists only “Terminal” items; no MCU device	Not in BOM; see discrepancies
Metadata/properties	Use exact MPN (e.g., ESP32‑C3FH4) and manufacturer, datasheet URL	Project properties list Manufacturer “Espressif Systems”, Datasheet URL present; MPN is “ESP32-C3”	Incomplete MPN specificity; see discrepancies

References used

Datasheet (Espressif, ESP32-C3 Series v1.5): 2312201733_Espressif-Systems-ESP32-C3_C2838500.pdf
Espressif documentation (family/ordering info): https://documentation.espressif.com/esp32-c3_datasheet_en.html
Variant overview (FH4/FN4 family, same QFN32 pinout): https://documentation.espressif.com/esp32-c3_datasheet_en.html
Example distributor listing (FH4 QFN-32-EP 5x5): https://jlcpcb.com/partdetail/EspressifSystems-ESP32C3FH4/C2858491

Discrepancies and issues found

Missing schematic symbol: The project has only 33 standalone terminals and no MCU symbol instance. Without a proper symbol (32 perimeter pins + EP pad) and pin numbers, electrical connectivity cannot be validated or netlisted correctly.
MCU not in BOM: There is no MCU IC in the BOM; only “Terminal” items. This prevents sourcing and DFM checks for the chip.
MPN not specific: Properties list MPN “ESP32-C3”; project title implies “[ESP32-C3FH4]”(ESP32-C3FH4). If the intent is the in-package 4 MB flash, high-temperature part, set the MPN to ESP32‑C3FH4 (or the exact ordering code you will buy). If using the base die without in-package flash, keep ESP32‑C3, but that conflicts with the “FH4” in the title.
EP/thermal vias connectivity: The footprint includes a thermal via array inside the EP, but the design currently has no nets. Ensure pad 33 (EP) and the thermal via array are tied to the GND net in the schematic/layout. If left unconnected, thermal and RF/EMI performance will be compromised.
Land pattern numeric confirmation: The datasheet you provided points to an external land-pattern source file for exact pad dimensions. The footprint’s 0.27×0.81 mm pad size and 3.7×3.7 mm EP look reasonable for QFN32 5x5, but you should confirm against Espressif’s recommended pattern (or IPC-7351 nominal) for final production.

Recommendations to resolve

Add the correct MCU symbol and link it to the existing footprint, ensuring the pin numbers map exactly to the datasheet sequence (1..32 CCW, plus EP=GND).
Update MPN to the exact ordering code you intend to purchase: ESP32‑C3 vs ESP32‑C3FH4 (or FH4X/FH4AZ if applicable). Include flash size and temperature grade in properties to avoid ambiguity.
Ensure EP (pad 33) and the internal thermal vias are assigned to the GND net and that paste apertures follow Espressif’s guidance (tiled paste to control voiding).
Confirm the footprint dimensions against Espressif’s recommended land pattern from their packaging files or hardware design guide; adjust pad length/width and EP size if needed.
Populate the BOM with the MCU so availability, lifecycle, and pricing can be tracked. Also consider a second source or variant backup per best practice.

If you want, I can:

Create/attach a proper 33-pin schematic symbol mapped to this footprint.
Update the project properties (exact MPN, flash size, temp grade).
Connect EP and thermal vias to GND once a GND net exists.

Ask for symbol creation

Clarify exact variant

Check footprint dimensions

Thermal/GND connection guidance

BOM and sourcing question

135 days

Ready.

Reviews

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