2 layers95 × 95 mm
4 layers100 × 100 mm
Stez80
imix/stez80a Z80 based system including an emulator
- Size
- 100 × 100 mm
- Copper layers
- 4
- Thickness
- 1.6 mm
- Parts
- 39
- Nets
- 94
- Pads
- 320
- Tracks, vias
- 1,471, 280
- Pours
- 2
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 27 Apr 2025
- Updated
- 18 May 2025
Overview
Stez80 is an open-source printed circuit board by imix, from the imix/stez80 repository on GitHub. It is a 4-layer board of 100 × 100 mm with 39 parts on 94 nets, routed with 1,471 tracks and 280 vias.
It is built around the ATMEGA16A-PU, MAX232N and 74HC14, with the AS6C1008-55PCN among its other parts. Its parts include 16 capacitors, 7 ICs, 4 resistors, 3 connectors and 2 diodes. It belongs with the AVR (ATmega, ATtiny) boards of this library.
Main components
4
ATMEGA16A-PU
DIP-40-40℃~+85℃ 10bit 16KB 16MHz 1KB 2.7V~5.5V 32 512Byte 8 Bit AVR Built-in FLASH DIP-40 Microcontrollers (MCU/MPU/SOC) ROHSMicrochip TechnologyMicrocontrollers (MCU/MPU/SOC)
MAX232N
PDIP-160℃~+70℃ 120Kbps 2 2 4.5V~5.5V Transceiver PDIP-16 RS232 ICs ROHSTexas InstrumentsRS232 ICs
74HC14
SOP-14-40℃~+85℃ 1.9V、3.98V、4.4V、5.48V、5.9V 100mV、260mV、260mV 20uA 25ns@4.5V,50pF 2V~6V 6 74HC Noise suppression function Schmitt trigger SOP-14 Inverters ROHSJSMSEMIInverters
AS6C1008-55PCN
PDIP-320℃~+70℃ 1Mbit 1uA 2.7V~5.5V 55ns 60mA PDIP-32 SRAM ROHSAlliance MemorySRAM
Parts
39| Qty | Value | Footprint | References |
|---|---|---|---|
| 10 | 100nF | Capacitor_THT:C_Rect_L7.0mm_W2.0mm_P5.00mm | C1, C2, C3, C4, C5, C6, C8, C9, C11, C16 |
| 4 | 1uF | Capacitor_THT:C_Rect_L7.0mm_W2.0mm_P5.00mm | C10, C13, C14, C15 |
| 3 | Jumper_2_Bridged | Connector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_Vertical | JP1, JP3, JP5 |
| 2 | 10k | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P2.54mm_Vertical | R3, R4 |
| 2 | 1uF | Capacitor_THT:CP_Radial_D5.0mm_P2.50mm | C7, C12 |
| 2 | Jumper_3_Bridged12 | Connector_PinHeader_2.54mm:PinHeader_1x03_P2.54mm_Vertical | JP2, JP4 |
| 1 | 1K | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P2.54mm_Vertical | R1 |
| 1 | 1N4002 | Diode_THT:D_DO-15_P15.24mm_Horizontal | D1 |
| 1 | 27C512 | Package_DIP:DIP-28_W15.24mm_LongPads | U4 |
| 1 | 3K9 | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P2.54mm_Vertical | R2 |
| 1 | 74HC14 | Package_DIP:DIP-14_W7.62mm | U1 |
| 1 | AS6C1008-55PCN | Package_DIP:DIP-32_W15.24mm_LongPads | U3 |
| 1 | ATmega16A-P | Package_DIP:DIP-40_W15.24mm_LongPads | U5 |
| 1 | Barrel_Jack | Connector_BarrelJack:BarrelJack_GCT_DCJ200-10-A_Horizontal | J2 |
| 1 | CXO_DIP8 | Oscillator:Oscillator_DIP-8 | Y1 |
| 1 | Conn_01x32_Pin | Connector_PinHeader_2.54mm:PinHeader_1x32_P2.54mm_Vertical | J1 |
| 1 | DE9_Socket | Connector_Dsub:DSUB-9_Socket_Horizontal_P2.77x2.84mm_EdgePinOffset7.70mm_Housed_MountingHolesOffset9.12mm | J3 |
| 1 | LED | LED_THT:LED_D3.0mm_Clear | D2 |
| 1 | MAX232 | Package_DIP:DIP-16_W7.62mm_LongPads | U7 |
| 1 | SW_Push | Button_Switch_THT:SW_PUSH_6mm_H7.3mm | SW1 |
| 1 | Z80CPU | Package_DIP:DIP-40_W15.24mm_LongPads | U2 |
| 1 | Z80_SIO | Package_DIP:DIP-40_W15.24mm_LongPads | U6 |
Questions
How big is the Stez80 PCB?
It measures 100 × 100 mm and has 4 copper layers, 1.6 mm thick.
What parts does the Stez80 use?
39 parts, built around the ATMEGA16A-PU, MAX232N, 74HC14 and AS6C1008-55PCN. 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 Stez80 KiCad files?
From the imix/stez80 repository on GitHub, at the commit this page was made from: the board is stez80/stez80.kicad_pcb and its schematic stez80/cpu.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Stez80 design in my own project?
Its repository states no licence, so its author keeps all rights: ask imix before reusing the design.
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