4 layers99.8 × 119.8 mm
4 layers99.8 × 119.8 mm
LC RFE RevA2
myriadrf/lc-rfe7LibreCellular RF Front-End Hardware Design
- Size
- 99.8 × 119.8 mm
- Copper layers
- 4
- Thickness
- 1.6 mm
- Parts
- 262
- Nets
- 196
- Pads
- 1,092
- Tracks, vias
- 1,279, 2,201
- Pours
- 150
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 4 Jul 2024
- Updated
- 3 Jun 2025
Overview
LC RFE RevA2 is an open-source printed circuit board by myriadrf, from the myriadrf/lc-rfe repository on GitHub. It is a 4-layer board of 99.8 × 119.8 mm with 262 parts on 196 nets, routed with 1,279 tracks and 2,201 vias.
It is built around the RT9742CGJ5, SN74LVC1G04DCK and SN74LVC1G32DCK, with the FT24C32A-ELR-T, TPS7A0533PDBV and HC-RF-IPEX0303-01 among its other parts. Its parts include 91 capacitors, 46 resistors, 32 ICs, 32 connectors and 15 inductors. It belongs with the STM32 boards of this library.
Main components
12
RT9742CGJ5
TSOT-23-5-40℃~+85℃ 1 2.7V~6V 2A 70mΩ Active High High Side Switch Short-Circuit Protection(SCP)、Undervoltage Protection(UVP)、Overcurrent Protection(OCP)、Over Temperature Protection TSOT-23-5 Power Distribution Switches ROHSRICHTEKPower Distribution Switches
SN74LVC1G04DCK
SC-70-5-40℃~+125℃ 1 1 1.65V~5.5V 1.7V~2V 10uA 3.7ns@5V,50pF 32mA 32mA 700mV~800mV 74LVC 电源关断保护 SC-70-5 Inverters ROHSTexas InstrumentsInvertersSN74LVC1G32DCK
SC-70-5-40℃~+125℃ 1 1.65V~5.5V 1.7V~2V 10uA 2 3.8V 32mA 32mA 4ns@5V,50pF 550mV~650mV 700mV、800mV 74LVC Series OR Gate Overvoltage-tolerant input、Rear drive protection、Level shifting、Local shutdown mode、Live insertion protection SC-70-5 Logic Gates ROHSTexas InstrumentsLogic GatesFT24C32A-ELR-T
SOT-23-5-40℃~+85℃ 1,000,000 cycles 1.7V~5.5V 100 Years 1MHz 32Kbit 5ms I2C SOT-23-5 EEPROM ROHSFMDEEPROMTPS7A0533PDBV
SOT-23-5-40℃~+125℃@(Tj) 1 180uVrms 1uA 200mA 235mV@(200mA) 3.3V 40dB@(1MHz) 5.5V Fixed Over Current Protection、Over Temperature Protection Positive SOT-23-5 Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHSTexas InstrumentsVoltage Regulators - Linear, Low Drop Out (LDO) Regulators
HC-RF-IPEX0303-01
SMD1 1.25mm 2mm Board Side IPEX Inner pin SMD Coaxial Connectors (RF) ROHSHCTLCoaxial Connectors (RF)
USBLC6-2P6
SOT-666-6-40℃~+125℃ 150nA 17V 2 3.5pF 5.25V 5A@8/20us 6V ESD IEC 61000-4-2 Unidirectional SOT-666-6 ESD and Surge Protection (TVS/ESD) ROHSSTMicroelectronicsESD And Surge Protection (TVS/ESD)
01000020Z
插件20A 20mm、25mm、30mm 5mm Clip Cylindrical 插件 Fuseholders ROHSLittelfuseFuseholders
BM04B-SRSS-TB
Header SR 1.0 SMT top entry, 1mm pitchJSTUncategorised
BSZ086P03NS3G
TSDSON-8FL-55℃~+150℃ 1 P-Channel 1.9V 165pF 30V 4.785nF 40A 57.5nC@10V 69W 8.6mΩ@10V TSDSON-8FL MOSFETs ROHSInfineon TechnologiesMOSFETs
S3B-PH-K-S
弯插,P=2mm2A 100V, Pitch 2.0mm, 3 Positions Disconnectable Crimp Style, THD Male Header, Side EntryJSTWire To Board ConnectorXSDG43MB
插件,3x3mmLED Indication - DiscreteSunLED
README
README.rstLibreCellular RF Front-End
.. image:: https://raw.githubusercontent.com/myriadrf/lc-rfe/main/images/RFE_RevA2_PCB_1_1280w.jpg :alt: LibreCellular RFE PCBA.
This repository contains the PCB (KiCAD) design for the RF Front-End (RFE).
For further details see the LibreCellular Documentation_.
Licence
LibreCelluar RF Front-End is copyright 2024, 2025 Ordinatra Minima Ltd & AB Open Ltd, and provided under the Solderpad Hardware License v2.1.
.. _LibreCellular Documentation: https://librecellular.org/developer/hardware/rf/rfe.html
Parts
262| Qty | Value | Footprint | References |
|---|---|---|---|
| 32 | 100n | Capacitor_SMD:C_0402_1005Metric | C1003, C1004, C1005, C1010, C1011, C1012, C1105, C1205, C1305, C1405, C1501, C1502, C1503, C1504, C1601, C1602 +16 |
| 24 | ~ | LC_RFE:Harwin_S0941-46R | MECH1101_a1, MECH1101_b1, MECH1101_c1, MECH1101_d1, MECH1101_e1, MECH1101_f1, MECH1201_a1, MECH1201_b1, MECH1201_c1, MECH1201_d1, MECH1201_e1, MECH1201_f1, MECH1301_a1, MECH1301_b1, MECH1301_c1, MECH1301_d1 +8 |
| 16 | 0 | LC_RFE:0201-SQUARE | R501, R502, R503, R504, R505, R506, R507, R508, R509, R510, R511, R512, R513, R514, R515, R516 |
| 11 | 4u7 | Capacitor_SMD:C_0402_1005Metric | C301, C308, C603, C701, C801, C902, C1002, C1101, C1201, C1301, C1401 |
| 10 | 10K | Resistor_SMD:R_0402_1005Metric | R102, R202, R203, R206, R207, R301, R306, R401, R402, R602 |
| 10 | 22u | Capacitor_SMD:C_1206_3216Metric | C207, C208, C209, C210, C217, C218, C219, C220, C307, C601 |
| 10 | uFL | LC_RFE:Molex_734120110 | CON509, CON510, CON511, CON512, CON513, CON514, CON515, CON516, CON901, CON1001 |
| 9 | FB | Inductor_SMD:L_0402_1005Metric | L601, L701, L801, L901, L1001, L1101, L1201, L1301, L1401 |
| 8 | 10u | Capacitor_SMD:C_1210_3225Metric | C201, C202, C203, C204, C211, C212, C213, C214 |
| 8 | SMA | LC_RFE:Samtec_SMA-J-P-H-RA-TH1_W_CLEARANCE | CON501, CON502, CON503, CON504, CON505, CON506, CON507, CON508 |
| 4 | 1000p | Capacitor_SMD:C_0402_1005Metric | C1106, C1206, C1306, C1406 |
| 4 | 100p | Capacitor_SMD:C_0402_1005Metric | C1103, C1203, C1303, C1403 |
| 4 | 1n | Capacitor_SMD:C_0402_1005Metric | C906, C907, C1006, C1007 |
| 4 | 1u | Capacitor_SMD:C_0402_1005Metric | C1102, C1202, C1302, C1402 |
| 4 | 26.1K 0.1% | Resistor_SMD:R_0402_1005Metric | R104, R106, R107, R108 |
| 4 | 27p | Capacitor_SMD:C_0402_1005Metric | C1104, C1204, C1304, C1404 |
| 4 | 68nH | Inductor_SMD:L_0603_1608Metric | L1102, L1202, L1302, L1402 |
| 4 | MT | MountingHole:MountingHole_3.2mm_M3_Pad_Via | H1, H2, H3, H4 |
| 4 | RF-LNA_TQL9063 | LC_RFE:SON50P200X200X90-9N | IC1101, IC1201, IC1301, IC1401 |
| 4 | RF-Switch-SPDT_SKY13286-359LF | LC_RFE:QFN65P400X400X100-17N-D | IC903, IC905, IC1003, IC1005 |
| 4 | RF-Switch_SKY13286-359LF | LC_RFE:QFN65P400X400X100-17N-D | IC1501, IC1502, IC1601, IC1602 |
| 4 | ~ | LC_RFE:Harwin_S03-15100300R | MECH1101, MECH1201, MECH1301, MECH1401 |
| 3 | 390 | Resistor_SMD:R_0402_1005Metric | R302, R901, R1001 |
| 3 | Conn_01x03 | Connector_PinHeader_2.54mm:PinHeader_1x03_P2.54mm_Vertical | J301, J1501, J1601 |
| 3 | Conn_01x04 | Connector_Molex:Molex_KK-254_AE-6410-04A_1x04_P2.54mm_Vertical | CON104, CON403, CON404 |
| 3 | Conn_01x04 | LC_RFE:Dorabo_DB2ERC-2.5-4P-GN | CON101, CON401, CON402 |
| 2 | 1.5nH | Inductor_SMD:L_0402_1005Metric | L902, L1002 |
| 2 | 1.8p | Capacitor_SMD:C_0402_1005Metric | C908, C1008 |
| 2 | 10n | Capacitor_SMD:C_0402_1005Metric | C909, C1009 |
| 2 | 18p | Capacitor_SMD:C_0402_1005Metric | C305, C306 |
| 2 | 1u | Capacitor_SMD:C_0603_1608Metric | C205, C215 |
| 2 | 3.3K | Resistor_SMD:R_0402_1005Metric | R304, R305 |
| 2 | 68 0.1% | Resistor_SMD:R_0402_1005Metric | R902, R1002 |
| 2 | D_Schottky | Diode_SMD:D_SOD-323_HandSoldering | D401, D402 |
| 2 | Power-Buck_TPSM63604RDLR | LC_RFE:B3QFN-20(5.0x5.5)-RDL0020A | IC201, IC202 |
| 2 | Power-VRef_ADR5040BKSZ-REEL7 | LC_RFE:SOT65P210X110-3N | IC902, IC1002 |
| 2 | RF-Attenuator_F1956NBGI8 | LC_RFE:QFN50P500X500X80-33N-D | IC701, IC801 |
| 2 | RF-PwrDet_LTC5587IDD#TRPBF | LC_RFE:SON45P300X300X80-13N-D | IC901, IC1001 |
| 2 | RF-Switch-SP3T_SKY13588-460LF | LC_RFE:QFN50P200X200X65-13N-D | IC904, IC1004 |
| 2 | RT9742CGJ5 | Package_TO_SOT_SMD:TSOT-23-5 | IC401, IC402 |
| 2 | Relay | LC_RFE:Omron_P6B-26P+G6B-2214 | K401, K402 |
| 2 | SN74LVC1G04DCK | Package_TO_SOT_SMD:SOT-353_SC-70-5 | IC1503, IC1603 |
| 2 | SN74LVC1G32DCK | Package_TO_SOT_SMD:SOT-353_SC-70-5 | IC1504, IC1604 |
| 2 | TestPoint | TestPoint:TestPoint_Pad_D2.0mm | TP901, TP1001 |
| 2 | USBLC6-2P6 | LC_RFE:SOT-666 | D102, D501 |
| 1 | 01000020Z | LC_RFE:Fuseholder_2x_Littelfuse_100_series_5x20mm | F101 |
| 1 | 110K 0.1% | Resistor_SMD:R_0402_1005Metric | R201 |
| 1 | 12.1K | Resistor_SMD:R_0402_1005Metric | R208 |
| 1 | 191K 0.1% | Resistor_SMD:R_0402_1005Metric | R103 |
| 1 | 2.2K | Resistor_SMD:R_0402_1005Metric | R303 |
| 1 | 30K9 | Resistor_SMD:R_0402_1005Metric | R601 |
| 1 | 40.2K 0.1% | Resistor_SMD:R_0402_1005Metric | R205 |
| 1 | 6.98K 1% | Resistor_SMD:R_0402_1005Metric | R204 |
| 1 | 75K 0.1% | Resistor_SMD:R_0402_1005Metric | R105 |
| 1 | 8.2p | Capacitor_SMD:C_0402_1005Metric | C216 |
| 1 | 8MHz | LC_RFE:Crystal_SMD_5032-2Pin_5.0x3.2mm | Y301 |
| 1 | BM04B-SRSS-TB | LC_RFE:BM04B-SRSS-TB | CON105 |
| 1 | BSZ086P03NS3G | LC_RFE:TSDSON-8(3.3x3.3) | Q101 |
| 1 | BZX84C12LT1G | Package_TO_SOT_SMD:SOT-23 | D101 |
| 1 | C | Capacitor_SMD:C_0402_1005Metric | C206 |
| 1 | Conn_01x02 | Connector_Molex:Molex_KK-396_5273-02A_1x02_P3.96mm_Vertical | CON102 |
| 1 | Conn_01x03 | Connector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_Vertical | J302 |
| 1 | FT24C32A-ELR-T | Package_TO_SOT_SMD:SOT-23-5 | IC303 |
| 1 | Power-LDO_NCP59800BMNADJTBG | LC_RFE:DFN-8(3x3) | IC601 |
| 1 | R | Resistor_SMD:R_0402_1005Metric | R101 |
| 1 | S3B-PH-K-S | LC_RFE:Connector-2mm-1x3P_S3B-PH-K-S | CON517 |
| 1 | STM32G0B1CBTx | Package_QFP:LQFP-48_7x7mm_P0.5mm | IC301 |
| 1 | TCB73B-H048-L1 | LC_RFE:PushButton-TCB73B-H048-L1 | SW301 |
| 1 | TPS7A0533PDBV | Package_TO_SOT_SMD:SOT-23-5 | IC302 |
| 1 | USB_B | LC_RFE:Samtec_USBR-B-S-F-O-TH | CON103 |
| 1 | XSDG43MB | LED_THT:LED_D3.0mm_Horizontal_O3.81mm_Z6.0mm | D301 |
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Questions
How big is the LC RFE RevA2 PCB?
It measures 99.8 × 119.8 mm and has 4 copper layers, 1.6 mm thick.
What parts does the LC RFE RevA2 use?
262 parts, built around the RT9742CGJ5, SN74LVC1G04DCK, SN74LVC1G32DCK and FT24C32A-ELR-T. 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 LC RFE RevA2 KiCad files?
From the myriadrf/lc-rfe repository on GitHub, at the commit this page was made from: the board is revisions/LC_RFE-RevA2/LC_RFE-RevA2.kicad_pcb and its schematic panels/back/back-panel-v1.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the LC RFE RevA2 design in my own project?
Its repository states no licence, so its author keeps all rights: ask myriadrf before reusing the design.