2 layers46.5 × 71.4 mm
IphoneFM
louisflakes/IphoneFM
KiCad project for IphoneFM Rev A. Built step by step from ../../design/rev-a/kicad-build-procedure.md; checked with ../../tools/kicadcheck.py.
106 parts
2 layers78.4 × 90.4 mm
IphoneFM panel
louisflakes/IphoneFMKiCad project for IphoneFM Rev A. Built step by step from ../../design/rev-a/kicad-build-procedure.md; checked with ../../tools/kicadcheck.py.
- Size
- 78.4 × 90.4 mm
- Copper layers
- 2
- Thickness
- 1.52 mm
- Parts
- 134
- Nets
- 93
- Pads
- 470
- Tracks, vias
- 825, 303
- Pours
- 7
- Routed
- Yes
- KiCad
- KiCad 10.0 (file 20260206)
- Created
- 18 Oct 2026
- Updated
- 7 Nov 2026
Overview
IphoneFM panel is an open-source printed circuit board by louisflakes, from the louisflakes/IphoneFM repository on GitHub. It is a 2-layer board of 78.4 × 90.4 mm with 134 parts on 93 nets, routed with 825 tracks and 303 vias.
It is built around the STM32U535CEU6, PE43711B-Z and SI4705-D60-GM, with the PE42421SCAA-Z, AP2112K-3.3TRG1 and LMX2571NJKR among its other parts. Its parts include 41 capacitors, 27 resistors, 7 ICs, 4 diodes and 3 switches. It belongs with the STM32 boards of this library.
Main components
12
STM32U535CEU6
UFQFPN-48(7x7)-40℃~+85℃ 1.71V~3.6V 160MHz 274KB 32 Bit 37 512KB ARM Cortex-M33 Built-in FLASH UFQFPN-48(7x7) Microcontrollers (MCU/MPU/SOC) ROHSSTMicroelectronicsMicrocontrollers (MCU/MPU/SOC)
PE43711B-Z
QFN-24-EP(4x4)-40℃~+105℃ 0.25dB、0.5dB、1dB 0dB~31.75dB 1.5dB、1.85dB、2.4dB、2.8dB 50Ω 9kHz~6GHz Electrostatic protection、Digitally programmable attenuation、Multi-step attenuation、Digital control interface、Parallel control interface QFN-24-EP(4x4) RF Attenuators ROHSpSemiRF Attenuators
SI4705-D60-GM
QFN-20-EP(3x3)QFN-20-EP(3x3) RF Transceiver ICs ROHSSilicon LabsRF Transceiver ICs
PE42421SCAA-Z
SOT-363-40℃~+85℃ 0.5dB 1.8V~3.3V 10MHz~3GHz 20dB 33.5dBm Integrated control logic SPDT SC-70-6 RF Switches ROHSpSemiRF Transceiver ICs
AP2112K-3.3TRG1
SOT-25-5-40℃~+85℃@(Ta) 1 250mV@(600mA) 3.3V 50uVrms 55uA 600mA 65dB@(1kHz) 6V Fixed Over Current Protection、Thermal Shutdown、Enable control Positive SOT-25-5 Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHSDiodes IncorporatedVoltage Regulators - Linear, Low Drop Out (LDO) Regulators
LMX2571NJKR
QFN-36-EP(6x6)-40℃~+85℃ 1.4GHz 2 3.15V~3.45V External、Built-in QFN-36-EP(6x6) Clock Generators, PLLs, Frequency Synthesizers ROHSTexas InstrumentsClock Generators, PLLs, Frequency Synthesizers
USBLC6-2SC6
SOT-23-60.35pF、0.8pF 100nA 150W@8/20us 15V 2 5V 6A@8/20us 6V ESD SOT-23-6 ESD and Surge Protection (TVS/ESD) ROHSUMWESD And Surge Protection (TVS/ESD)
0402CG330J500NT
040233pF 50V C0G ±5% 0402 Multilayer Ceramic Capacitors MLCC - SMD/SMT ROHSGuangdong Fenghua Advanced Tech (FH)Multilayer Ceramic Capacitors MLCC - SMD/SMT
RK10J11R0A0H
SMD10kΩ 20V 30mW ±30% SMD Potentiometers, Variable Resistors ROHSALPSALPINEPotentiometers & Variable Resistors0402B102K500NT
04021nF 50V X7R ±10% 0402 Multilayer Ceramic Capacitors MLCC - SMD/SMT ROHSGuangdong Fenghua Advanced Tech (FH)Multilayer Ceramic Capacitors MLCC - SMD/SMT
CL21A106KAYNNNE
080510uF 25V X5R ±10% 0805 Multilayer Ceramic Capacitors MLCC - SMD/SMT ROHSSamsung Electro-MechanicsMultilayer Ceramic Capacitors MLCC - SMD/SMT
LQW18ANR10G00D
0603100nH 220mA 680mΩ Consumer grade Unshielded Inductor ±2% 0603 Inductors (SMD) ROHSMurataPower Inductors
README
kicad/rev-a/README.mdKiCad project for IphoneFM Rev A. Built step by step from ../../design/rev-a/kicad-build-procedure.md; checked with ../../tools/kicadcheck.py.
Parts
134| Qty | Value | Footprint | References |
|---|---|---|---|
| 25 | NPTH | NPTH | KiKit_MB_1_1, KiKit_MB_1_2, KiKit_MB_1_3, KiKit_MB_1_4, KiKit_MB_1_5, KiKit_MB_2_1, KiKit_MB_2_2, KiKit_MB_2_3, KiKit_MB_2_4, KiKit_MB_2_5, KiKit_MB_3_1, KiKit_MB_3_2, KiKit_MB_3_3, KiKit_MB_3_4, KiKit_MB_3_5, KiKit_MB_4_1 +9 |
| 20 | 100 nF X7R 16 V | IphoneFM:C_0402_1005Metric | C4, C10, C11, C13, C14, C15, C16, C17, C18, C19, C20, C21, C22, C33, C39, C40 +4 |
| 9 | 10 kΩ 1% | IphoneFM:R_0402_1005Metric | R3, R9, R10, R11, R12, R13, R14, R15, R19 |
| 4 | 1 µF X5R 50 V | IphoneFM:C_0603_1608Metric | C1, C2, C8, C27 |
| 4 | 33 pF C0G | IphoneFM:C_0402_1005Metric | C28, C30, C37, C38 |
| 4 | 33 Ω 1% | IphoneFM:R_0402_1005Metric | R4, R6, R7, R8 |
| 4 | M2 | IphoneFM:MountingHole_2.2mm_M2 | H1, H2, H3, H4 |
| 3 | 10 kΩ 3B | IphoneFM:Potentiometer_Alps_RK10J_Reflow_Thumbwheel_14mm | RV1, RV2, RV3 |
| 3 | Fiducial | Fiducial | FID1, FID2, FID3 |
| 2 | 1 kΩ 1% | IphoneFM:R_0402_1005Metric | R16, R17 |
| 2 | 1 nF X7R 50 V | IphoneFM:C_0402_1005Metric | C31, C34 |
| 2 | 10 µF X5R 25 V | IphoneFM:C_0805_2012Metric | C3, C12 |
| 2 | 100 nH 2% | IphoneFM:L_0603_1608Metric | L2, L3 |
| 2 | 100 pF C0G | IphoneFM:C_0402_1005Metric | C24, C26 |
| 2 | 2 kΩ 1% | IphoneFM:R_0402_1005Metric | R23, R24 |
| 2 | 390 Ω 1% | IphoneFM:R_0402_1005Metric | R26, R27 |
| 2 | 5.1 kΩ 1% | IphoneFM:R_0402_1005Metric | R1, R2 |
| 2 | 6.8 kΩ 1% | IphoneFM:R_0402_1005Metric | R20, R21 |
| 2 | 600 Ω at 100 MHz | IphoneFM:L_0402_1005Metric | FB2, FB3 |
| 2 | ESD 5.5 V | IphoneFM:Texas_DPY0002A_0.6x1mm_P0.65mm | D3, D4 |
| 1 | 1.1 kΩ 1% | IphoneFM:R_0402_1005Metric | R5 |
| 1 | 1.5 nF C0G | IphoneFM:C_0402_1005Metric | C25 |
| 1 | 100 kΩ 1% | IphoneFM:R_0402_1005Metric | R18 |
| 1 | 150 nH 2% | IphoneFM:L_0603_1608Metric | L1 |
| 1 | 2.2 µF X5R 16 V | IphoneFM:C_0603_1608Metric | C23 |
| 1 | 20 MHz CMOS XO | IphoneFM:Oscillator_SMD_SiT_PQFN-4Pin_3.2x2.5mm | Y2 |
| 1 | 22 nF X7R 50 V | IphoneFM:C_0402_1005Metric | C32 |
| 1 | 3.3 V 600 mA LDO | IphoneFM:SOT-23-5 | U3 |
| 1 | 3.3 pF C0G | IphoneFM:C_0402_1005Metric | C36 |
| 1 | 3V3 | IphoneFM:TestPoint_Pad_D1.5mm | TP2 |
| 1 | 4.7 µF X5R 25 V | IphoneFM:C_0805_2012Metric | C9 |
| 1 | 510 Ω 1% | IphoneFM:R_0402_1005Metric | R25 |
| 1 | 56 pF C0G | IphoneFM:C_0402_1005Metric | C29 |
| 1 | 6 pF C0G | IphoneFM:C_0402_1005Metric | C35 |
| 1 | 6 × SPST | IphoneFM:SW_DIP_SPSTx06_Side_CK_TDP06H1SBD1_W7.62mm_P1.27mm | SW3 |
| 1 | 604 Ω 1% | IphoneFM:R_0402_1005Metric | R22 |
| 1 | 75 Ω at 100 MHz | IphoneFM:L_0402_1005Metric | FB1 |
| 1 | Digital step attenuator | IphoneFM:QFN-24-1EP_4x4mm_P0.5mm_EP2.75x2.75mm | U7 |
| 1 | ESD 5 V, 0.5 pF | IphoneFM:D_SOD-882 | D5 |
| 1 | FM receiver | IphoneFM:SiliconLabs_QFN-20-1EP_3x3mm_P0.5mm_EP1.8x1.8mm | U4 |
| 1 | GND | IphoneFM:TestPoint_Pad_D1.5mm | TP3 |
| 1 | LMX_MUX | IphoneFM:TestPoint_Pad_D1.5mm | TP5 |
| 1 | MCU | IphoneFM:QFN-48-1EP_7x7mm_P0.5mm_EP5.6x5.6mm | U1 |
| 1 | NRST | IphoneFM:TestPoint_Pad_D1.5mm | TP6 |
| 1 | RF_MODE | IphoneFM:TestPoint_Pad_D1.5mm | TP4 |
| 1 | RGB LED, common anode | IphoneFM:LED_RGB_XINGLIGHT_XL-1615RGBC_1.6x1.5mm | D1 |
| 1 | SMA jack | IphoneFM:SMA_BAT_Wireless_BWSMA-KWE-Z001 | J2 |
| 1 | SPDT | IphoneFM:SW_SPDT_Shouhan_MSK12C02_Tabs4 | SW1 |
| 1 | SPDT RF switch | IphoneFM:SOT-363_SC-70-6 | U5 |
| 1 | SPST | IphoneFM:SW_SPST_EVQP7A | SW2 |
| 1 | SWCLK | IphoneFM:TestPoint_Pad_D1.5mm | TP7 |
| 1 | SWDIO | IphoneFM:TestPoint_Pad_D1.5mm | TP8 |
| 1 | Synthesizer | IphoneFM:TI_NJK0036A_WQFN-36-1EP_6x6mm_P0.5mm_EP4.6x4.6mm | U2 |
| 1 | USB 2.0 Type-C | IphoneFM:USB_C_Receptacle_HRO_TYPE-C-31-M-12_2020 | J1 |
| 1 | USB ESD array | IphoneFM:SOT-23-6 | U6 |
| 1 | VBUS | IphoneFM:TestPoint_Pad_D1.5mm | TP1 |
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Questions
How big is the IphoneFM panel PCB?
It measures 78.4 × 90.4 mm and has 2 copper layers, 1.52 mm thick.
What parts does the IphoneFM panel use?
134 parts, built around the STM32U535CEU6, PE43711B-Z, SI4705-D60-GM and PE42421SCAA-Z. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.
Where can I download the IphoneFM panel KiCad files?
From the louisflakes/IphoneFM repository on GitHub, at the commit this page was made from: the board is kicad/rev-a/panel/IphoneFM-panel.kicad_pcb and its schematic kicad/rev-a/IphoneFM.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the IphoneFM panel design in my own project?
Its repository states no licence, so its author keeps all rights: ask louisflakes before reusing the design.