DigiKey self-assembly BOM
Optional sourcing for the revised 0.0.5-dev eight-pin pill carrier. JLCPCB remains the primary assembled-board ordering path. This overlay never replaces the JLC BOM/CPL or native part fields.
35 SMT pieces / 17 DigiKey lines are selected, including every capacitor, resistor, LED and TVS (23 pieces / 12 lines). The revised switches and USB-C use exact shared JLCPCB/DigiKey manufacturer parts. LCD, camera and Luckfox are excluded; customer headers and mechanical hardware remain separate.
Download DigiKey CSV · Remaining original-parts CSV
Stock is a dated observation, not reserved inventory. Counts marked “not recorded” require a checkout-time check. Quantities are exact installed counts without spares or soldering losses. Cut-tape order codes avoid full-reel minimums.
| References | Value / requirements | Qty: 1 / 5 boards | Selected MPN | DigiKey cut-tape/tray code | Stock snapshot |
|---|---|---|---|---|---|
| C605, C606 | 33 pF; 0805; 50 V; ±5%; C0G/NP0 | 2 / 10 | CC0805JRNPO9BN330 | 311-1105-1-ND | 61962 |
| C301, C601 | 100 nF; 0805; 50 V; ±10%; X7R | 2 / 10 | CC0805KRX7R9BB104 | 311-1140-1-ND | 880728 |
| C201, C302, C701, C702 | 10 µF; 0805; 25 V; ±10%; X5R; 0.95 mm max height | 4 / 20 | CL21A106KACLRNC | 1276-2397-1-ND | 2546 |
| C602, C603, C604 | 1 µF; 0805; 50 V; ±10%; X7R | 3 / 15 | C0805C105K5RACTU | 399-C0805C105K5RACTUCT-ND | 125411 |
| R601, R606 | 100 kΩ; 0805; ±1%; 125 mW | 2 / 10 | RC0805FR-07100KL | 311-100KCRCT-ND | 526449 |
| R602, R603 | 100 Ω; 0805; ±1%; 125 mW | 2 / 10 | RC0805FR-07100RL | 311-100CRCT-ND | 1083343 |
| R605, R607 | 10 kΩ; 0805; ±1%; 125 mW | 2 / 10 | RC0805FR-0710KL | 311-10.0KCRCT-ND | 1580141 |
| R604 | 47 Ω; 0805; ±1%; 125 mW | 1 / 5 | RC0805FR-0747RL | 311-47.0CRCT-ND | 94241 |
| R301, R302 | 5.1 kΩ; 0805; ±1%; 125 mW | 2 / 10 | CR0805-FX-5101ELF | CR0805-FX-5101ELFCT-ND | 28897 |
| R303 | 560 Ω; 0805; ±1%; 125 mW | 1 / 5 | RC0805FR-07560RL | 311-560CRCT-ND | 45507 |
| D302 | Green LED; 0805; 2.00×1.25 mm; 0.75 mm max height; Vf typ 2.65 V at 2 mA | 1 / 5 | APT2012LZGCK | 754-1939-1-ND | 75055 |
| D301 | 5 V bidirectional TVS; SOD-123F; VRWM 5 V; VBR 6.4–7.0 V; VC max 9.2 V at 21.7 A; 200 W (10/1000 µs) | 1 / 5 | SMF5.0CA | 18-SMF5.0CACT-ND | 11192 |
| U701 | 3.3 V LDO; SOT-25; 600 mA | 1 / 5 | AP2112K-3.3TRG1 | AP2112K-3.3TRG1DICT-ND | not recorded |
| J601 | Contact smartcard socket; Original full-size contact socket | 1 / 5 | 7312P0225A13LF | 609-4481-ND | 3141 |
| U601 | UART smartcard bridge; 24-QFN 5×5 mm; UR2 firmware | 1 / 5 | SEC1210/PV-UR2 | SEC1210/PV-UR2-ND | 56 |
| SW501, SW502, SW503, SW504, SW505, SW506, SW507, SW508 | Momentary switch; G leads; 2.5 mm nominal height; 250 gf; SPST-NO | 8 / 40 | PTS636SK25SMTRLFS | CKN12322-1-ND | 20644 |
| J301 | USB-C power input; 6 contacts; default 1.00 mm shell stakes; 3 A connector rating | 1 / 5 | USB4125-GF-A | 2073-USB4125-GF-ACT-ND | 13606 |
Unresolved fitted parts (none in this revision)
Assembly notes
- All resistors remain 0805, ±1%, 125 mW with the same resistance. Capacitors retain nominal capacitance, voltage class, tolerance and dielectric. No pad or net changes are required by this sourcing overlay.
- The green LED uses the existing 560 Ω resistor. Its typical 2.65 V forward voltage gives an illustrative
(5 − 2.65) / 560 ≈ 4.2 mA; actual current and brightness vary. Follow native K/cathode polarity. - The TVS remains bidirectional 5 V stand-off / 200 W pulse class. A 9.2 V clamp rating is not an overvoltage shutdown or a guarantee that every downstream supply pin stays within its absolute maximum.
- Self-assembly of the entire board still includes the exposed-pad QFN smartcard bridge. Use a controlled paste/reflow process and inspection; the large passive lands do not make the QFN an ordinary header-soldering task.
- Use the revision-specific C&K switch and GCT USB4125 lands. Old-board footprints and enclosure plungers are not interchangeable by assumption.
- Physical bring-up and supply/camera/display qualification remain pending; use the staged assembly guide.
Selection notes
- C605, C606: Same MPN as JLC.
- C301, C601: Same MPN as JLC.
- C201, C302, C701, C702: Replaces CL21A106KAYNNNE with the same nominal capacitance, voltage, tolerance and dielectric; lower body height.
- C602, C603, C604: Replaces CL21B105KBFNNNE at matching capacitance, voltage, tolerance and dielectric.
- R601, R606: Same resistance, tolerance and nominal power rating.
- R602, R603: Same resistance, tolerance and nominal power rating.
- R605, R607: Same resistance, tolerance and nominal power rating.
- R604: Same resistance, tolerance and nominal power rating.
- R301, R302: Same USB-C Rd resistance/tolerance/power. Selected over out-of-stock Yageo RC0805FR-075K1L.
- R303: Same LED series resistance, tolerance and power rating.
- D302: Green indicator on the existing LED lands; retain R303 560 Ω. Match cathode to native pad 1/K; brightness can differ.
- D301: Same TVS function and nominal pulse/clamp class in the existing SOD-123F footprint. Bidirectional CA required; does not add overvoltage disconnect.
- U701: Exact original regulator.
- J601: Exact original socket; orientation follows native drawing.
- U601: Exact original firmware suffix; do not use URT or another SEC1210 variant.
- SW501, SW502, SW503, SW504, SW505, SW506, SW507, SW508: Exact shared JLC/DigiKey MPN; revised native footprint. Requires physical first-article qualification.
- J301: Exact shared JLC/DigiKey MPN; revised native footprint. Requires physical first-article qualification.
Retained reference
Kingbright LED drawing and ratings. The Littelfuse SMF manufacturer data sheet is the online TVS reference. The original JLC TVS drawing is retained separately.
Board identity
Board SHA-256: d9ff1151deb55c36f355f1967cd5b3d3d09a6c394cdcebefc71823b60bdf0cdf.
Supplier pages checked 2026-10-17. Rebuild using mise run bom:self-assembly; verify generated data with mise run bom:self-assembly -- --check.
Source: variants/lcd-module-2.8/self-assembly/BOM-DIGIKEY.md ↗. Documentation describes reviewed evidence; it does not replace physical testing.