2 layers116.8 × 94.1 mm TMP76C75T, the printed circuit board in 3D

TMP76C75T

(My first PCB) My attempt at a SBC for the MH6111/TMP76C75T microprocessor

Size: 116.8 × 94.1 mm
Copper layers: 2
Thickness: 1.6 mm
Parts: 58
Nets: 102
Pads: 388
Tracks, vias: 731, 82
Pours: 2
Routed: Yes
KiCad: KiCad 6 (file 20211014)
Created: 4 Dec 2021
Updated: 1 Mar 2022

Overview

TMP76C75T is an open-source printed circuit board by Data-ptr, from the Data-ptr/TMP76C75T-SBC repository on GitHub. It is a 2-layer board of 116.8 × 94.1 mm with 58 parts on 102 nets, routed with 731 tracks and 82 vias.

It is built around the 27C256-17/J. Its parts include 15 capacitors, 10 connectors, 4 ICs, 4 diodes and 2 switches.

Main components

27C256-17/J
-0℃~+70℃ 256Kbit 4.5V~5.5V EPROM Parallel Port (Parallel) - Non-Volatile Memory (ROM)Microchip TechnologyNon-Volatile Memory (ROM)

README

README.md

TMP76C75T SBC

(My first PCB) My attempt at a SBC for the MH6111/TMP76C75T microprocessor

Front:

Back:

Parts

Qty	Value	Footprint	References
11	C_Small	Capacitor_SMD:C_1206_3216Metric	C2, C3, C4, C7, C8, C9, C10, C11, C12, C13, C14
8	Conn_01x08_Male	Connector_PinHeader_2.54mm:PinHeader_1x08_P2.54mm_Vertical	J1, J3, J3-2, J4, J4-2, J4-ADDR1, J5, J7
7	R_Network08	Resistor_THT:R_Array_SIP9	RN1, RN3, RN3-2, RN4, RN4-2, RN5, RN7
6	Conn_01x02	Connector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_Vertical	J-CNTL2, J-GND1, J-GND2, J-GND3, J-GND4, J-PWR2
3	IN4001	Diode_THT:D_A-405_P10.16mm_Horizontal	D0, D1, D2
2	C_Small	Capacitor_SMD:C_2816_7142Metric	C5, C15
1	27C256	Socket:DIP_Socket-28_W11.9_W12.7_W15.24_W17.78_W18.5_3M_228-1277-00-0602J	U2
1	C	Capacitor_THT:CP_Radial_D5.0mm_P2.50mm	C1
1	C_Small	Capacitor_THT:CP_Radial_D5.0mm_P2.50mm	C6
1	Conn_01x02_Male	Connector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_Vertical	J-CLK2
1	Conn_01x03	Connector_PinHeader_2.54mm:PinHeader_1x03_P2.54mm_Vertical	J-BYPASS1
1	Conn_01x03_Male	Connector_PinHeader_2.54mm:PinHeader_1x03_P2.54mm_Vertical	J-CNTL1
1	Conn_01x06_Male	Connector_PinHeader_2.54mm:PinHeader_1x06_P2.54mm_Vertical	J6
1	Conn_01x07_Male	Connector_PinHeader_2.54mm:PinHeader_1x07_P2.54mm_Vertical	J2
1	Conn_Coaxial_x2_Isolated	Connector_Coaxial:SMA_Amphenol_901-144_Vertical	J-CLK1
1	Crystal	Crystal:Crystal_HC18-U_Vertical	XTAL1
1	Jack-DC	Connector_BarrelJack:BarrelJack_CUI_PJ-063AH_Horizontal	J-PWR1
1	LED_Small	LED_THT:LED_D3.0mm	D3
1	LM78M05_TO220	Package_TO_SOT_THT:TO-220-3_Vertical	U4
1	M60011-0131J	Package_LCC:PLCC-44_THT-Socket	U3
1	R_Network04_US	Resistor_THT:R_Array_SIP5	RN2
1	R_Network06	Resistor_THT:R_Array_SIP7	RN6
1	R_Small_US	Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P2.54mm_Vertical	R1
1	SW_DIP_x03	Button_Switch_THT:SW_DIP_SPSTx03_Slide_9.78x9.8mm_W7.62mm_P2.54mm	SW1
1	SW_Push_SPDT	Button_Switch_THT:SW_PUSH_6mm_H5mm	SW2
1	TMP76C75T	Package_LCC:PLCC-68_THT-Socket	U1
1	USB_B_Micro	Connector_USB:USB_Micro-B_Wuerth_629105150521	J-PWR3

Questions

How big is the TMP76C75T PCB?

It measures 116.8 × 94.1 mm and has 2 copper layers, 1.6 mm thick.

What parts does the TMP76C75T use?

58 parts, built around the 27C256-17/J. 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 TMP76C75T KiCad files?

From the Data-ptr/TMP76C75T-SBC repository on GitHub, at the commit this page was made from: the board is TMP76C75T.kicad_pcb and its schematic TMP76C75T.kicad_sch. PCBKit opens the board in the browser, with nothing to install.

Can I use the TMP76C75T design in my own project?

Its repository states no licence, so its author keeps all rights: ask Data-ptr before reusing the design.

Project files

Show this board on your page

A live frame, for any web page

<iframe src="https://pcbkit.io/embed/boards/data-ptr-tmp76c75t-sbc" title="TMP76C75T in PCBKit" width="100%" height="480" style="border:0;border-radius:12px" allow="fullscreen" loading="lazy"></iframe>

A picture

<img src="https://pcbkit.io/embed/boards/data-ptr-tmp76c75t-sbc.jpg" alt="TMP76C75T" width="1200" height="900">

A picture that opens the board, for a README

[![TMP76C75T](https://pcbkit.io/embed/boards/data-ptr-tmp76c75t-sbc.jpg?size=s)](https://pcbkit.io/boards/data-ptr-tmp76c75t-sbc)

Source

Repository: Data-ptr/TMP76C75T-SBC
Board file: TMP76C75T.kicad_pcb
Commit: e658d5c
Licence: Not stated

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