2 layers85 × 85 mm
4 layers82 × 82 mm
Root electronics repo
- Size
- 82 × 82 mm
- Copper layers
- 4
- Thickness
- 1.6 mm
- Parts
- 151
- Nets
- 116
- Pads
- 749
- Tracks, vias
- 2,329, 220
- Pours
- 7
- Routed
- Yes
- KiCad
- KiCad 4
- Created
- 14 Mar 2016
- Updated
- 7 Feb 2020
Overview
Cpu3 is an open-source printed circuit board by SpaceScienceSweden, from the SpaceScienceSweden/ulv_electronics repository on GitHub. It is a 4-layer board of 82 × 82 mm with 151 parts on 116 nets, routed with 2,329 tracks and 220 vias.
It is built around the ATMEGA128L-8AN, SN74LVC1G125DBVR-TP and MAX485ED, with the RS-243.3SZ, THN 30-2415 and DS18B20Z among its other parts. Its parts include 53 resistors, 47 capacitors, 15 connectors, 14 ICs and 10 diodes. It belongs with the AVR (ATmega, ATtiny) boards of this library.
Main components
12
ATMEGA128L-8AN
TQFP-64(14x14)10bit 128KB 2.7V~5.5V 4KB 53 8MHz AVR FLASH TQFP-64(14x14) Microcontrollers (MCU/MPU/SOC) ROHSMicrochip TechnologyMicrocontrollers (MCU/MPU/SOC)
SN74LVC1G125DBVR-TP
SOT-23-5-40℃~+125℃ 1 1.65V~5.5V 2.6ns@5.0V,50pF 24mA 24mA 2uA 74LVC Tri-State Unidirectional SOT-23-5 Buffers, Drivers, Receivers, Transceivers ROHSTECH PUBLICBuffers, Drivers, Receivers, Transceivers
MAX485ED
SOP-8-40℃~+85℃ 1 1 1mA 32 4.75V~5.25V 5Mbps Half-Duplex Transceiver ±8kV SOP-8 RS-485 / RS-422 ICs ROHSHTCRS-485 / RS-422 ICsRS-243.3SZ
SIP,22x9.5mm-40℃~+85℃ 1 1.5kV 100mVp-p 12mm 2200uF 22mm 3.3V 300kHz 3W 78% 9.5mm 909mA 9V~36V Short Circuit Protection SIP,22x9.5mm Isolated Power Modules ROHSYLPTECIsolated Power ModulesTHN 30-2415
-Power Supply Module,Power SuppliesTRACO POWER
DS18B20Z
SOIC-8-55℃~+125℃ 12bit 2.5V~5.5V 750ms Single-bus ±0.4℃ SOIC-8 Temperature Sensors ROHSUMWTemperature Sensors
71V124SA12YGI
SOJ-32-40℃~+85℃ 1Mbit 3V~3.6V SOJ-32 SRAM ROHSRenesas ElectronicsSRAM
CD74AC153M96
SOP-16-55℃~+125℃ 1.5V~5.5V 20ns@5V,50pF 24mA 24mA 74AC 8uA Single Supply SOP-16 Signal Switches, Multiplexers, Decoders ROHSTexas InstrumentsSignal Switches, Multiplexers, Decoders
SN74AHC573N
PDIP-20-40℃~+85℃ 1ns 2V~5.5V 74AHC 8mA 8mA D Latch Tri-State PDIP-20 Latches ROHSTexas InstrumentsLatches
PMBF170
SOT-23-65℃~+150℃ 1 N-channel 10pF 2V 300mA 30pF 40pF 5.3Ω@4.5V 60V 830mW N-Channel SOT-23 MOSFETs ROHSNexperiaMOSFETs
SMS240
DO-213AB-50℃~+150℃ 1 Independent 2A 40V 500mV@2A 500uA@40V DO-213AB Schottky Diodes ROHSDIOTECSchottky Diodes
IRLL024NPBF
SOT-223-41 N-channel 140pF 2.1W 2V 4.4A 510pF 55V 58pF SOT-223-4 MOSFETs ROHSInfineon TechnologiesMOSFETs
Parts
151| Qty | Value | Footprint | References |
|---|---|---|---|
| 29 | 10u | Capacitors_SMD:C_1210 | C15, C16, C17, C18, C19, C20, C21, C22, C23, C24, C25, C26, C27, C28, C29, C30 +13 |
| 17 | 0 | Resistors_SMD:R_0805 | R14, R15, R39, R40, R41, R42, R43, R44, R45, R46, R47, R48, R49, R50, R51, R52 +1 |
| 12 | 100n | Capacitors_SMD:C_0805 | C1, C2, C3, C4, C7, C8, C11, C12, C13, C14, C35, C37 |
| 6 | 10k | Resistors_SMD:R_0805 | R1, R5, R23, R25, R26, R38 |
| 6 | 22 | SCUBE:Resistor_1206_2010_combined | R9, R10, R11, R12, R18, R19 |
| 6 | 56k | Resistors_SMD:R_0805 | R28, R29, R30, R31, R32, R33 |
| 6 | CONN_02X12 | SCUBE:FTSH-112-04-L-D-RA | P1, P5, P6, P7, P12, P13 |
| 4 | 10u | Capacitors_SMD:C_0805 | C9, C10, C34, C36 |
| 4 | 120 | Resistors_SMD:R_0805 | R8, R13, R16, R17 |
| 4 | M6 | SCUBE:M6_PTH | P8, P9, P10, P11 |
| 3 | 12V | Diodes_SMD:SMA_Standard | D4, D5, D6 |
| 3 | 18k | Resistors_SMD:R_0805 | R20, R22, R24 |
| 3 | 40V | Diodes_SMD:SMA_Standard | D3, D9, D10 |
| 3 | PMBF170 | TO_SOT_Packages_SMD:SOT-23 | Q2, Q3, Q4 |
| 3 | SN74LVC1G125DBVR | TO_SOT_Packages_SMD:SOT-23-5 | U5, U6, U7 |
| 2 | 150k | Resistors_SMD:R_0805 | R21, R37 |
| 2 | 1k2 | Resistors_SMD:R_0805 | R3, R4 |
| 2 | 22p | Capacitors_SMD:C_0805 | C5, C6 |
| 2 | 360 | Resistors_SMD:R_0805 | R34, R35 |
| 2 | LED_Small | LEDs:LED_0805 | D1, D7 |
| 2 | SMS240 | Diodes_SMD:MELF_Standard | D2, D8 |
| 1 | 100 | SCUBE:Resistor_1206_2010_combined | R2 |
| 1 | 120 | SCUBE:Resistor_1206_2010_combined | R7 |
| 1 | 1M | Resistors_SMD:R_0805 | R6 |
| 1 | 22k | Resistors_SMD:R_0805 | R27 |
| 1 | 4k7 | Resistors_SMD:R_0805 | R36 |
| 1 | 502774-0891 | SCUBE:Molex_502774-0891 | CON1 |
| 1 | 7.3728 MHz | Crystals:Crystal_HC49-SD_SMD | Y1 |
| 1 | 71V124SA12YGI | SMD_Packages:SOJ-32 | U3 |
| 1 | ATMEGA128L-8AN | Housings_QFP:TQFP-64_14x14mm_Pitch0.8mm | IC2 |
| 1 | ATMEGA128L-8AN | SCUBE:ATmegaS128 | IC1 |
| 1 | CD74AC153M96 | Housings_SOIC:SOIC-16_3.9x9.9mm_Pitch1.27mm | U1 |
| 1 | CONN_01X02 | Pin_Headers:Pin_Header_Straight_1x02 | P3 |
| 1 | CONN_02X12 | SCUBE:LPPB122NFSP-RC-holes-backpads | P4 |
| 1 | DS18B20Z | SMD_Packages:SOIC-8-N | U4 |
| 1 | FUSE_BYPASS | SCUBE:solder_bridge_1mm | P14 |
| 1 | IRLL024NPBF | TO_SOT_Packages_SMD:SOT-223 | Q1 |
| 1 | ISP | Pin_Headers:Pin_Header_Straight_2x03 | P2 |
| 1 | LOGO | HERE:lulebotics3 | G*** |
| 1 | LOGO | HERE:scube | G*** |
| 1 | LOGO | HERE:teknisk_fysik | G*** |
| 1 | LOGO | HERE:umu_logo | G*** |
| 1 | LOGO | HERE:logo | G*** |
| 1 | LOGO | HERE:atmel | G*** |
| 1 | MAX485 | Housings_SOIC:SOIC-8_3.9x4.9mm_Pitch1.27mm | U11 |
| 1 | Polyfuse_Small | Fuse_Holders_and_Fuses:Fuse_SMD2920 | F1 |
| 1 | RS-243.3SZ | SCUBE:RSO-2412D_v2 | U8 |
| 1 | SN74AHC573 | SCUBE:SO-20 | U2 |
| 1 | THN_30-2415 | SCUBE:THN_30-2415 | U10 |
| 1 | TMR 6-2421WI | SCUBE:RSO-2412D_v2 | U9 |
| 1 | TSR 1-2433 | SCUBE:TSR_1 | U12 |
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Questions
How big is the Cpu3 PCB?
It measures 82 × 82 mm and has 4 copper layers, 1.6 mm thick.
What parts does the Cpu3 use?
151 parts, built around the ATMEGA128L-8AN, SN74LVC1G125DBVR-TP, MAX485ED and RS-243.3SZ. 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 Cpu3 KiCad files?
From the SpaceScienceSweden/ulv_electronics repository on GitHub, at the commit this page was made from: the board is cpu3/cpu3.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.
Can I use the Cpu3 design in my own project?
Its repository states no licence, so its author keeps all rights: ask SpaceScienceSweden before reusing the design.