2 layers73.4 × 117.4 mm
4 layers60 × 60 mm
HdlcSpy
FastRabbit/hdlcSpy- Size
- 60 × 60 mm
- Copper layers
- 4
- Thickness
- 1.6 mm
- Parts
- 37
- Nets
- 74
- Pads
- 215
- Tracks, vias
- 260, 65
- Pours
- 2
- Routed
- Yes
- KiCad
- KiCad 10.0 (file 20260206)
- Created
- 5 Oct 2026
- Updated
- 25 Oct 2026
Overview
HdlcSpy is an open-source printed circuit board by FastRabbit, from the FastRabbit/hdlcSpy repository on GitHub. It is a 4-layer board of 60 × 60 mm with 37 parts on 74 nets, routed with 260 tracks and 65 vias.
It is built around the SN74LVC1G14DBV, ST4E1240DT and VLMTG1400-GS08, with the PMEG60T10ELRX and RASPBERRY PI PICO 2 among its other parts. Its parts include 15 resistors, 7 capacitors, 5 ICs, 5 diodes and 3 connectors. It belongs with the RP2040 and RP2350 boards of this library.
Main components
5
SN74LVC1G14DBV
SOT-23-5-40℃~+85℃ 1 1 1.16V~3.33V 1.65V~5.5V 10uA 2.3V 32mA 32mA 390mV~1.87V 550mV 6.5ns@2.5V,50pF 74LVC Schmitt trigger 电源关断保护、噪声抑制功能 SOT-23-5 Inverters ROHSTexas InstrumentsInverters
ST4E1240DT
SO-8SO-8 RS-485 / RS-422 ICs ROHSSTMicroelectronicsRS-485 / RS-422 ICs
VLMTG1400-GS08
0603-40℃~+80℃ 1.4cd 146° 2.85V 20mA 518nm 525nm 64mW Discrete Diode Emerald Green 0603 LED Indication - Discrete ROHSVishay IntertechnologyLED Indication - Discrete
PMEG60T10ELRX
SOD-123W-65℃~+150℃ 1A 600mV@1A 60V 650nA@60V Independent SOD-123W Schottky Diodes ROHSNexperiaSchottky DiodesRASPBERRY PI PICO 2
-- Raspberry Pi ROHSRaspberry PiRaspberry Pi
Parts
37| Qty | Value | Footprint | References |
|---|---|---|---|
| 14 | 10K | Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R2, R3, R4, R5, R6, R7, R8, R9, R10, R11, R15, R16, R17, R18 |
| 7 | 100N | Capacitor_SMD:C_0603_1608Metric_Pad1.08x0.95mm_HandSolder | C1, C2, C3, C4, C5, C6, C7 |
| 4 | VLMTG1400-GS08 | LED_SMD:LED_0603_1608Metric | D1, D2, D3, D4 |
| 2 | SN74LVC1G14DBV | Package_TO_SOT_SMD:SOT-23-5 | U5, U6 |
| 2 | ST4E1240DT | Package_SO:SOIC-8_3.9x4.9mm_P1.27mm | U2, U3 |
| 1 | 10R | Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R12 |
| 1 | Connector_PinHeader_2.54mm:PinHeader_1x09_P2.54mm_Vertical | Connector_PinHeader_2.54mm:PinHeader_1x09_P2.54mm_Vertical | J2 |
| 1 | LM2936-5.0 | Package_TO_SOT_SMD:SOT-223-3_TabPin2 | U1 |
| 1 | Micro_SD_Card_Det_Hirose_DM3AT | Connector_Card:microSD_HC_Hirose_DM3D-SF | J3 |
| 1 | PCB | eb-pcb:4L | Z1 |
| 1 | PIN HEADER 2.0MM PITCH STR SMT,2 | Connector_PinHeader_2.00mm:PinHeader_2x12_P2.00mm_Vertical_SMD | J1 |
| 1 | PMEG60T10ELRX | Diode_SMD:Nexperia_CFP3_SOD-123W | D5 |
| 1 | RaspberryPi_Pico2 | Module:RaspberryPi_Pico_Common_Unspecified | A1 |
Questions
How big is the HdlcSpy PCB?
It measures 60 × 60 mm and has 4 copper layers, 1.6 mm thick.
What parts does the HdlcSpy use?
37 parts, built around the SN74LVC1G14DBV, ST4E1240DT, VLMTG1400-GS08 and PMEG60T10ELRX. 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 HdlcSpy KiCad files?
From the FastRabbit/hdlcSpy repository on GitHub, at the commit this page was made from: the board is hw/hdlcSpy/hdlcSpy.kicad_pcb and its schematic hw/hdlcSpy/hdlcSpy.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the HdlcSpy design in my own project?
Its repository states no licence, so its author keeps all rights: ask FastRabbit before reusing the design.
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