4 layers305 × 208.3 mm
4 layers34.8 × 36 mm
Atmxt2952td breakout
EvanKrall/ipad_touchscreen_driver7A PCB designed to interface with the iPad (A1219) touchscreen
- Size
- 34.8 × 36 mm
- Copper layers
- 4
- Thickness
- 1 mm
- Parts
- 53
- Nets
- 144
- Pads
- 395
- Tracks, vias
- 1,147, 137
- Pours
- 6
- Routed
- Yes
- KiCad
- KiCad 5 (file 20171130)
- Created
- 4 Feb 2021
- Updated
- 25 Feb 2021
Overview
Atmxt2952td breakout is an open-source printed circuit board by EvanKrall, from the EvanKrall/ipad_touchscreen_driver repository on GitHub. It is a 4-layer board of 34.8 × 36 mm with 53 parts on 144 nets, routed with 1,147 tracks and 137 vias.
It is built around the HT7533-1(SOT89-3) and 2N7002E. Its parts include 26 capacitors, 13 resistors, 7 connectors, 2 ICs and 2 diodes. It belongs with the interfaces and adapters boards of this library.
Main components
2
HT7533-1(SOT89-3)
SOT-89-3-40℃~+125℃ 1 250mA 2uA 3.3V 40V 550mV@(100mA) Fixed Over Current Protection、Short Circuit Protection Positive SOT-89-3 Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHSHEERMICRUncategorised
2N7002E
SOT-23-55℃~+150℃ 1 N-channel 2.5V 225mW 3.5Ω@5V 300mA 60V N-Channel SOT-23 MOSFETs ROHSSlkorMOSFETs
README
README.mdipad_touchscreen_driver (deprecated)
This repo is deprecated because the mXT2952 is too tiny for cheap PCB houses to handle. See the new design in my ipad_touchscreen_driver_gt9113 repo.
This is part of my larger project to put a single-board computer inside the original iPad.
This circuit uses the mXT2952TD touchscreen controller from Microchip, which seems to be the only capacitive touchscreen controller available in small quantities that has enough TX and RX lines to drive the iPad's screen.
See the rendered images and gerbers on the releases page
Please give feedback!
I'm still quite new at PCB design, and this board has many firsts for me (first BGA, first 4-layer board, first board of such small pitch). I haven't yet had this board manufactured, so it is untested. If you notice anything that seems wrong, it's probably wrong. I would very much appreciate any advice you can give. Please feel free to file an issue or add a comment on the Hackaday project page.
Parts
53| Qty | Value | Footprint | References |
|---|---|---|---|
| 14 | 22nF | Capacitor_SMD:C_0402_1005Metric | C2, C8, C9, C10, C12, C13, C14, C16, C17, C19, C21, C22, C25, C26 |
| 6 | 2.2uF | Capacitor_SMD:C_0603_1608Metric | C1, C7, C11, C18, C20, C23 |
| 4 | 0 | Resistor_SMD:R_0402_1005Metric | R8, R10, R11, R12 |
| 3 | 10k | Resistor_SMD:R_0402_1005Metric | R3, R4, R13 |
| 2 | 3.3k | Resistor_SMD:R_0402_1005Metric | R6, R7 |
| 2 | 504740-5100 | footprints:504740-5100 | J7, J8 |
| 2 | DNF/15pF | Capacitor_SMD:C_0603_1608Metric_Pad1.05x0.95mm_HandSolder | C24, C27 |
| 2 | D_Schottky | Diode_SMD:D_SOD-123 | D1, D2 |
| 1 | 10 | Resistor_SMD:R_0402_1005Metric | R1 |
| 1 | 100k | Resistor_SMD:R_0402_1005Metric | R9 |
| 1 | 10nF | Capacitor_SMD:C_0402_1005Metric | C5 |
| 1 | 10uF | Capacitor_SMD:C_0603_1608Metric | C6 |
| 1 | 10uH | Inductor_SMD:L_0603_1608Metric | L1 |
| 1 | 2N7002E | Package_TO_SOT_SMD:SOT-23 | Q1 |
| 1 | 33pF | Capacitor_SMD:C_0402_1005Metric | C4 |
| 1 | 47 | Resistor_SMD:R_0402_1005Metric | R2 |
| 1 | 47k | Resistor_SMD:R_0402_1005Metric | R5 |
| 1 | CONN_10118194-0001LF_AMP | usb port:10118194-0001LF | J2 |
| 1 | Conn_01x01_Male | Connector_PinHeader_1.00mm:PinHeader_1x01_P1.00mm_Vertical | J5 |
| 1 | Conn_01x04_Male | Connector_PinHeader_2.54mm:PinHeader_1x06_P2.54mm_Vertical | J1 |
| 1 | Conn_01x04_Male | Connector_PinHeader_1.00mm:PinHeader_1x04_P1.00mm_Vertical | J3 |
| 1 | Conn_01x07_Male | Connector_PinHeader_1.00mm:PinHeader_1x07_P1.00mm_Vertical | J4 |
| 1 | DNF/16MHz | Crystal:Crystal_SMD_3225-4Pin_3.2x2.5mm_HandSoldering | Y1 |
| 1 | DNF/33pF | Capacitor_SMD:C_0603_1608Metric_Pad1.05x0.95mm_HandSolder | C3 |
| 1 | HT7533-1-SOT89 | Package_TO_SOT_SMD:SOT-89-3 | U2 |
| 1 | mXT2952TD | mXT2952TD:mXT2952TD | U1 |
Questions
How big is the Atmxt2952td breakout PCB?
It measures 34.8 × 36 mm and has 4 copper layers, 1 mm thick.
What parts does the Atmxt2952td breakout use?
53 parts, built around the HT7533-1(SOT89-3) and 2N7002E. 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 Atmxt2952td breakout KiCad files?
From the EvanKrall/ipad_touchscreen_driver repository on GitHub, at the commit this page was made from: the board is atmxt2952td breakout.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.
Can I use the Atmxt2952td breakout design in my own project?
Its repository states no licence, so its author keeps all rights: ask EvanKrall before reusing the design.
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