2 layers283.2 × 111.1 mm
2 layers213.1 × 129 mm
ZX Spectrum Pentagon
alekseibutiaev/electronics- Size
- 213.1 × 129 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 246
- Nets
- 382
- Pads
- 1,551
- Tracks, vias
- 10,929, 1,162
- Pours
- 2
- Routed
- Yes
- KiCad
- KiCad 8.0 (file 20240108)
- Created
- 13 Oct 2021
- Updated
- 21 Aug 2025
Overview
ZX Spectrum Pentagon is an open-source printed circuit board by alekseibutiaev, from the alekseibutiaev/electronics repository on GitHub. It is a 2-layer board of 213.1 × 129 mm with 246 parts on 382 nets, routed with 10,929 tracks and 1,162 vias.
It is built around the 74HC245D, 74HC244D and 74HC257D, with the 74HC574D, 74HC74D and 74HC00D among its other parts. It belongs with the retro computing and games boards and the FPGA and CPLD boards of this library.
Main components
12
74HC245D
SO-20-300mil-40℃~+125℃ 1 160uA 2V~6V 7.8mA 7.8mA 74HC 8 9ns@4.5V,50pF Bidirectional Tri-State SOIC-20-300mil Buffers, Drivers, Receivers, Transceivers ROHSNexperiaBuffers, Drivers, Receivers, Transceivers74HC244D
SO-20-300mil-40℃~+125℃ 160uA 2 2V~6V 4 6mA 6mA 74HC 9ns@5V,15pF Tri-State Unidirectional SOIC-20-300mil Buffers, Drivers, Receivers, Transceivers ROHSNexperiaBuffers, Drivers, Receivers, Transceivers
74HC257D
SO-16-40℃~+125℃ 160uA 19ns@6V、26ns@6V 2V~6V 7.8mA 7.8mA 74HC 8/4 Multiplexer Single Supply Tri-state output SOIC-16 Signal Switches, Multiplexers, Decoders ROHSNexperiaSignal Switches / Encoders & Decoders / Multiplexers74HC574D
SOP-20L-40℃~+125℃ 1 13ns 15ns@6V,50pF 2.7V~6V 20uA 28MHz 5ns 6.5pF 7.8mA 7.8mA 74HC Series 8 D-Type Enable Rising Edge Tri-State SOP-20L Flip Flops ROHSMDDFlip Flops
74HC74D
SOIC-14-40℃~+125℃ 1 15ns 2 2V~6V 3.5pF 37ns@6V,50pF 3ns、3ns、3ns 40uA 5.2mA 5.2mA 74HC Series 82MHz Asynchronous Complementary D-Type Rising Edge Set and Reset SOIC-14 Flip Flops ROHSNexperiaFlip Flops74HC00D
SOP-14-40℃~+125℃ 1.5V、3.15V、4.2V 1.9V、3.7V、5.9V 100mV、400mV、400mV 2 2V~6V 4 40uA 5.2mA 5.2mA 500mV~1.8V 74HC Series 7ns@6V,50pF NAND Gate SOIC-14 Logic Gates ROHSNexperiaLogic Gates74HC04D
SOP-14-40℃~+125℃ 1 1.5V~4.2V 1.9V、3.7V、5.2V 100mV、400mV、400mV 14ns@6V,50pF 2V~6V 2uA 5.2mA 5.2mA 500mV~1.8V 6 74HC SOIC-14 Inverters ROHSNexperiaInverters74HC08D
SOP-14-40℃~+125℃ 1.5V~4.2V 1.9V、3.7V、5.2V 100mV、400mV 2 27ns@4.5V,50pF 2V~6V 2uA 4 5.2mA 5.2mA 500mV~1.8V 74HC Series AND Gate SOIC-14 Logic Gates ROHSNexperiaLogic Gates
74HC153D
SOIC-16-40℃~+125℃ 160uA 2V~6V 44ns@4.5V,50pF 5.2mA 5.2mA 74HC 8/2 Multiplexer Output enable high-impedance Single Supply SOIC-16 Signal Switches, Multiplexers, Decoders ROHSNexperiaSignal Switches, Multiplexers, Decoders74HC193D
SO-16-40℃~+125℃ 1 18ns@6V 2V~6V 4 49MHz 500mW 74HC Asynchronous Divide-by-2 Reset function、Synchronous counting、Asynchronous parallel load、Multi-mode counting Rising Edge Synchronous Up Counter、Down Counter SO-16 Counters, Dividers ROHSNexperiaCounters / Dividers74HC393D
SOP-14-40℃~+125℃ 107MHz 12ns 2 2V~6V 4 Asynchronous Divide-by-2 Falling Edge SOIC-14 Counters, Dividers ROHSNexperiaCounters, Dividers74HC02
-- Logic Gates ROHSonsemiLogic Gates
Parts
246| Qty | Value | Footprint | References |
|---|---|---|---|
| 50 | 100nF | Capacitor_SMD:C_1206_3216Metric_Pad1.33x1.80mm_HandSolder | CPF1, CPF2, CPF10, CPF11, CPF12, CPF13, CPF14, CPF15, CPF16, CPF17, CPF18, CPF19, CPF20, CPF21, CPF22, CPF23 +34 |
| 10 | 1N4148 | Diode_SMD:D_SOD-323_HandSoldering | DG1, DG2, DIO1, DIO2, DIO3, DIO4, DIO5, DIO6, DIO7, DIO8 |
| 7 | 100nF | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | CIO2, CPS3, CPS5, CVE1, CVE3, CVE6, CVE8 |
| 6 | 4.7kOm | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | RIO2, RIO3, RIO4, RIO9, RPI3, RVF1 |
| 6 | 68 | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | RVE6, RVE9, RVE15, RVE16, RVE17, RVE18 |
| 6 | 74HC257 | Package_DIP:DIP-16_W7.62mm | U6, U17, U42, U46, U47, U48 |
| 6 | 75 | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | RVE19, RVE20, RVE21, RVE22, RVE23, RVE24 |
| 6 | MountingHole_Pad | MountingHole:MountingHole_3.2mm_M3_Pad_Via | H1, H2, H3, H4, H5, H6 |
| 5 | 10kOm | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | RCPU2, RCPU3, RG2, RG4, RVE25 |
| 5 | 1kOm | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | RG1, RG8, RIO6, RIO7, RIO11 |
| 5 | 74HC245 | Package_DIP:DIP-20_W7.62mm | U23, U24, U25, U26, U43 |
| 5 | 74HC574 | Package_DIP:DIP-20_W7.62mm | U18, U35, U36, U40, U45 |
| 5 | BC848 | Package_TO_SOT_SMD:SOT-23 | QG1, QVF1, QVF2, QVF3, QVF4 |
| 4 | 330 | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | RCPU1, RG5, RPI1, RPI2 |
| 4 | 47uF/16V | Capacitor_Tantalum_SMD:CP_EIA-3216-18_Kemet-A_Pad1.58x1.35mm_HandSolder | CG3, CIO1, CIO7, CPS1 |
| 3 | 18kOm | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | RVE5, RVE8, RVE11 |
| 3 | 1nF | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | CG4, CIO8, CM1 |
| 3 | 2.2kOm | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | RVE12, RVE13, RVE14 |
| 3 | 220uF/16V | Capacitor_Tantalum_SMD:CP_EIA-3528-21_Kemet-B_Pad1.50x2.35mm_HandSolder | CVE4, CVE5, CVE7 |
| 3 | 3.9kOm | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | RVE4, RVE7, RVE10 |
| 3 | 74HC74 | Package_DIP:DIP-14_W7.62mm | U13, U15, U33 |
| 3 | 8x10kOm | Resistor_THT:R_Array_SIP9 | RSCPU1, RSCPU2, RSIO1 |
| 2 | 100uH | Inductor_SMD:L_7.3x7.3_H4.5 | LIO1, LVE1 |
| 2 | 10uF/16V | Capacitor_Tantalum_SMD:CP_EIA-3216-18_Kemet-A_Pad1.58x1.35mm_HandSolder | CIO6, CIO9 |
| 2 | 150nF | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | CIO3, CIO5 |
| 2 | 20pF | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | CG1, CG2 |
| 2 | 270 | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | RVE1, RVE2 |
| 2 | 2kOm | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | RIO8, RIO10 |
| 2 | 330uF/50V | Capacitor_Tantalum_SMD:CP_EIA-7343-31_Kemet-D_Pad2.25x2.55mm_HandSolder | CPS2, CPS4 |
| 2 | 5.1kOm | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | RIO12, RIO13 |
| 2 | 680 | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | RG7, RVE3 |
| 2 | 74HC00 | Package_DIP:DIP-14_W7.62mm | U8, U32 |
| 2 | 74HC04 | Package_DIP:DIP-14_W7.62mm | U1, U7 |
| 2 | 74HC08 | Package_DIP:DIP-14_W7.62mm | U12, U34 |
| 2 | 74HC153 | Package_DIP:DIP-16_W7.62mm | U37, U38 |
| 2 | 74HC193 | Package_DIP:DIP-16_W7.62mm | U5, U10 |
| 2 | 74HC393 | Package_DIP:DIP-14_W7.62mm | U2, U14 |
| 2 | GAL16V8 | Package_DIP:DIP-20_W7.62mm | U29, U39 |
| 2 | GND | Connector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_Vertical | TP1, TP2 |
| 1 | 0XFE OUT | Connector_PinHeader_2.54mm:PinHeader_1x03_P2.54mm_Vertical | JIO1 |
| 1 | 1 | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | RPS2 |
| 1 | 1.5kOm | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | RPS4 |
| 1 | 128K/512K | ZX-Spectrum-Pentagon:PS-22F03 | SWVF1 |
| 1 | 13kOm | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | RPS1 |
| 1 | 14MHZ | Crystal:Crystal_HC49-U_Vertical | YG1 |
| 1 | 160 | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | RG6 |
| 1 | 180 | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | RPS3 |
| 1 | 1N5819 | Diode_SMD:D_SOD-323_HandSoldering | DPS1 |
| 1 | 220uH | CDInductor:CD43 | LPS2 |
| 1 | 22nF | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | CG5 |
| 1 | 29F040 | Package_LCC:PLCC-32_THT-Socket | U30 |
| 1 | 2MOm | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | RG3 |
| 1 | 3.3nF | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | CIO4 |
| 1 | 330pF | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | CPS7 |
| 1 | 33uH | Inductor_SMD:L_12x12mm_H6mm | LPS1 |
| 1 | 39kOm | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | RIO5 |
| 1 | 4.433619MHz | Crystal:Crystal_HC49-U_Vertical | YVE1 |
| 1 | 4.7uF/16V | Capacitor_Tantalum_SMD:CP_EIA-3216-18_Kemet-A_Pad1.58x1.35mm_HandSolder | CPS6 |
| 1 | 47kOm | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | RIO1 |
| 1 | 47uF/16V | Capacitor_Tantalum_SMD:CP_EIA-3528-21_Kemet-B_Pad1.50x2.35mm_HandSolder | CVE2 |
| 1 | 510pF | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | CG6 |
| 1 | 5pF | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | CVE10 |
| 1 | 5pF-20pF | Capacitor_SMD:C_Trimmer_Murata_TZC3 | CVE9 |
| 1 | 74HC02 | Package_DIP:DIP-14_W7.62mm | U11 |
| 1 | 74HC11 | Package_DIP:DIP-14_W7.62mm | U4 |
| 1 | 74HC14 | Package_DIP:DIP-14_W7.62mm | U3 |
| 1 | 74HC166 | Package_DIP:DIP-16_W7.62mm | U41 |
| 1 | 74HC244 | Package_DIP:DIP-20_W7.62mm | U28 |
| 1 | 74HC273 | Package_DIP:DIP-20_W7.62mm | U16 |
| 1 | 74HC32 | Package_DIP:DIP-14_W7.62mm | U31 |
| 1 | 74HC86 | Package_DIP:DIP-14_W7.62mm | U9 |
| 1 | AD724 | Package_SO:SOIC-16W_7.5x10.3mm_P1.27mm | U49 |
| 1 | AY-3-8910 | Package_DIP:DIP-40_W15.24mm | U19 |
| 1 | AY-3-8912 | Package_DIP:DIP-28_W15.24mm | U20 |
| 1 | AY-3-8913 | Package_DIP:DIP-24_W15.24mm | U21 |
| 1 | AY_IO | Connector_PinSocket_2.54mm:PinSocket_2x08_P2.54mm_Vertical | JIO3 |
| 1 | DF005S | Diode_SMD:Diode_Bridge_Vishay_DFS | DPS2 |
| 1 | EDGE-28M5 | ZX-Spectrum-Pentagon:EDGE_28M5-2.54 | XMCPU1 |
| 1 | GREEN | LED_SMD:LED_0805_2012Metric_Pad1.15x1.40mm_HandSolder | DPI3 |
| 1 | HDMI ADAPTER | Connector_IDC:IDC-Header_2x05_P2.54mm_Horizontal | JVE2 |
The 226 most common of 246 parts.
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Questions
How big is the ZX Spectrum Pentagon PCB?
It measures 213.1 × 129 mm and has 2 copper layers, 1.6 mm thick.
What parts does the ZX Spectrum Pentagon use?
246 parts, built around the 74HC245D, 74HC244D, 74HC257D and 74HC574D. 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 ZX Spectrum Pentagon KiCad files?
From the alekseibutiaev/electronics repository on GitHub, at the commit this page was made from: the board is ZX-Spectrum-Pentagon/ZX-Spectrum-Pentagon.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.
Can I use the ZX Spectrum Pentagon design in my own project?
Its repository states no licence, so its author keeps all rights: ask alekseibutiaev before reusing the design.