4 layers111.8 × 80.8 mm
4 layers50.3 × 63.5 mm
Prototype2
nmikstas/atari_pokey20Recreation of the Atari POKEY chip (work in progress)
- Size
- 50.3 × 63.5 mm
- Copper layers
- 4
- Thickness
- 1.6 mm
- Parts
- 93
- Nets
- 120
- Pads
- 393
- Tracks, vias
- 867, 117
- Pours
- 2
- Routed
- Yes
- KiCad
- KiCad 7 (file 20221018)
- Created
- 23 Dec 2022
- Updated
- 10 Dec 2024
Overview
Prototype2 is an open-source printed circuit board by nmikstas, from the nmikstas/atari_pokey repository on GitHub. It is a 4-layer board of 50.3 × 63.5 mm with 93 parts on 120 nets, routed with 867 tracks and 117 vias.
It is built around the 74LVC125AD, 74LVC1G97GV and LD1117S33TR(MS), with the SSM3K72KCT,L3F among its other parts. Its parts include 18 transistors, 11 capacitors, 10 ICs, 6 resistors and 3 connectors.
Main components
4
74LVC125AD
SOP-14L-40℃~+125℃ 1 1.65V~5.5V 2.6ns@5V,15pF 4 40uA 50mA 50mA 74LVC Schmitt trigger Tri-State Unidirectional SOP-14L Buffers, Drivers, Receivers, Transceivers ROHSMDDBuffers, Drivers, Receivers, Transceivers
74LVC1G97GV
SOT-23-6L-40℃~+125℃ 1 1.65V~5.5V Configurable Multi-Function Gate SOT-23-6L Specialty Logic ROHSMDDSpecialty Logic
LD1117S33TR(MS)
SOT-223-20℃~+125℃@(Ta) 1 1.4V@(1A) 12V 1A 2mA 3.3V Fixed Over Temperature Protection Positive SOT-223 Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHSMSKSEMIVoltage Regulators - Linear, Low Drop Out (LDO) Regulators
SSM3K72KCT,L3F
CST-31 N-channel 1.3pF 1.5Ω@10V 2.1V 400mA 40pF 5.5pF 500mW 600pC@4.5V 60V N-Channel CST-3 MOSFETs ROHSToshibaMOSFETs
README
README.mdatari_pokey
Recreation of the Atari POKEY chip (work in progress)
Parts
93| Qty | Value | Footprint | References |
|---|---|---|---|
| 45 | ~ | POKEY_Footprints:TP | TP1, TP2, TP10, TP11, TP12, TP13, TP14, TP15, TP16, TP17, TP18, TP19, TP20, TP21, TP22, TP23 +29 |
| 18 | SSM3K72KCT | POKEY_Footprints:CST3_TOS | Q1, Q2, Q3, Q4, Q5, Q6, Q7, Q10, Q11, Q12, Q13, Q14, Q15, Q16, Q17, Q18 +2 |
| 10 | .1uf | Capacitor_SMD:C_0201_0603Metric | C1, C2, C3, C4, C5, C6, C7, C8, C9, C10 |
| 4 | 74LVC125 | POKEY_Footprints:DHVQFN14_SOT762-1_NEX | U6, U7, U8, U9 |
| 3 | ~ | POKEY_Footprints:XSON8 | U3, U4, U5 |
| 1 | 1.65K 1% | Resistor_SMD:R_0201_0603Metric | R2 |
| 1 | 10uf | Capacitor_SMD:C_0805_2012Metric | C11 |
| 1 | 24K 1% | Resistor_SMD:R_0201_0603Metric | R5 |
| 1 | 2x20_Conn | POKEY_Footprints:Con_2X20 | J2 |
| 1 | 3.3K 1% | Resistor_SMD:R_0201_0603Metric | R3 |
| 1 | 7.68K 1% | Resistor_SMD:R_0201_0603Metric | R4 |
| 1 | 74LVC1G97 | POKEY_Footprints:DRY6 | U1 |
| 1 | 75K 1% | Resistor_SMD:R_0201_0603Metric | R6 |
| 1 | 825 1% | Resistor_SMD:R_0402_1005Metric | R1 |
| 1 | Conn_01x03_Pin | Connector_PinSocket_2.54mm:PinSocket_1x03_P2.54mm_Vertical | J3 |
| 1 | LD1117S33TR | POKEY_Footprints:Reg | U10 |
| 1 | ~ | POKEY_Footprints:Proto-72Pin | J1 |
| 1 | ~ | POKEY_Footprints:VQFN20_RKS_TEX | U2 |
Questions
How big is the Prototype2 PCB?
It measures 50.3 × 63.5 mm and has 4 copper layers, 1.6 mm thick.
What parts does the Prototype2 use?
93 parts, built around the 74LVC125AD, 74LVC1G97GV, LD1117S33TR(MS) and SSM3K72KCT,L3F. 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 Prototype2 KiCad files?
From the nmikstas/atari_pokey repository on GitHub, at the commit this page was made from: the board is PCB/Prototype2/Prototype2.kicad_pcb and its schematic PCB/Extender_Board/Extender_Board/Extender_Board.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Prototype2 design in my own project?
Its repository states no licence, so its author keeps all rights: ask nmikstas before reusing the design.
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