2 layers100 × 63.7 mm
4 layers78.2 × 50 mm
RAM2E
ozw1z5rd/RAM2E22MB Apple IIe extended 80-column card
- Size
- 78.2 × 50 mm
- Copper layers
- 4
- Thickness
- 1.6 mm
- Parts
- 63
- Nets
- 165
- Pads
- 456
- Tracks, vias
- 1,743, 574
- Pours
- 1,225
- Routed
- Yes
- KiCad
- KiCad 5 (file 20171130)
- Created
- 14 Sep 2020
- Updated
- 25 Jul 2020
Overview
RAM2E is an open-source printed circuit board by ozw1z5rd, from the ozw1z5rd/RAM2E repository on GitHub. It is a 4-layer board of 78.2 × 50 mm with 63 parts on 165 nets, routed with 1,743 tracks and 574 vias.
It is built around the EPM240T100C3, 74AHC245D and 74AHCT245D, with the 74LVC245AD, TPS73701DRV and W9864G6KH-6 among its other parts. Its parts include 30 capacitors, 10 resistors, 9 ICs and 2 connectors. It belongs with the FPGA and CPLD boards of this library.
Main components
6
EPM240T100C3
TQFP-100(14x14)0℃~+85℃ 192 2.5V、3.3V 240 240 4.7ns 80 In-system programming MAX II TQFP-100(14x14) Programmable Logic Device (CPLDs/FPGAs)Intel/AlteraProgrammable Logic Device (CPLDs/FPGAs)74AHC245D
SO-20-300mil-40℃~+125℃ 1 2V~5.5V 5ns@5V,50pF 74AHC 8 80uA 8mA 8mA Bidirectional Schmitt trigger Tri-State SO-20-300mil Buffers, Drivers, Receivers, Transceivers ROHSNexperiaBuffers, Drivers, Receivers, Transceivers
74AHCT245D
SOIC-20-300mil-40℃~+125℃ 1 11ns@5.5V,50pF 4.5V~5.5V 74AHCT 8 80uA 8mA 8mA Bidirectional TTL-compatible CMOS Tri-State SOIC-20-300mil Buffers, Drivers, Receivers, Transceivers ROHSNexperiaBuffers, Drivers, Receivers, Transceivers74LVC245AD
SOIC-20-300mil-40℃~+125℃ 1 1.65V~3.6V 2.9ns@3.3V,50pF 24mA 40uA 74LVC 8 Bidirectional Schmitt trigger Tri-State SOIC-20-300mil Buffers, Drivers, Receivers, Transceivers ROHSNexperiaBuffer/Driver/Transceiver
TPS73701DRV
WSON-6-EP(2x2)-40℃~+125℃@(Tj) 1 1.2V~5.5V 1A 5.5V 500mV@(1A) 58dB@(100Hz) Adjustable Over Current Protection、Over Temperature Protection、Enable Positive WSON-6-EP(2x2) Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHSTexas InstrumentsVoltage Regulators - Linear, Low Drop Out (LDO) Regulators
W9864G6KH-6
TSOPII-54-10.2mm0℃~+70℃ 166MHz 3V~3.6V 64Mbit TSOPII-54-10.2mm SDRAM ROHSWinbond ElecSDRAM
Parts
63| Qty | Value | Footprint | References |
|---|---|---|---|
| 22 | 2u2 | stdpads:C_0603 | C10, C11, C12, C13, C14, C15, C16, C17, C18, C19, C20, C21, C22, C23, C24, C25 +6 |
| 7 | 10u | stdpads:C_0805 | C1, C2, C3, C4, C5, C6, C29 |
| 5 | stdpads:PasteHole_1.1mm_PTH | H1, H2, H3, H4, H5 | |
| 4 | DNP | stdpads:R_0805 | R3, R4, R7, R8 |
| 4 | Fiducial | stdpads:Fiducial | FID1, FID2, FID3, FID4 |
| 3 | 4x100 | stdpads:Yageo_YC124 | RN1, RN2, RN3 |
| 2 | 0 | stdpads:R_0805 | R5, R6 |
| 2 | 74AHC245 | stdpads:TSSOP-20_4.4x6.5mm_P0.65mm | U3, U5 |
| 2 | 74AHCT245 | stdpads:TSSOP-20_4.4x6.5mm_P0.65mm | U6, U7 |
| 1 | 1k2 | stdpads:R_0805 | R9 |
| 1 | 22k | stdpads:R_0805 | R10 |
| 1 | 3k3 | stdpads:R_0805 | R2 |
| 1 | 5k76 | stdpads:R_0805 | R1 |
| 1 | 74LVC245 | stdpads:TSSOP-20_4.4x6.5mm_P0.65mm | U4 |
| 1 | AppleIIeAux | stdpads:AppleIIeAux_Edge | J1 |
| 1 | DNP | stdpads:SOT-223-6 | U9 |
| 1 | DNP | stdpads:C_0805 | C30 |
| 1 | EPM240T100 | stdpads:TQFP-100_14x14mm_P0.5mm | U1 |
| 1 | JTAG | stdpads:TC2050 | J2 |
| 1 | TPS73701 | stdpads:SOT-223-6 | U8 |
| 1 | W9864G6KH-6 | stdpads:TSOP-II-54_22.2x10.16mm_P0.8mm | U2 |
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Questions
How big is the RAM2E PCB?
It measures 78.2 × 50 mm and has 4 copper layers, 1.6 mm thick.
What parts does the RAM2E use?
63 parts, built around the EPM240T100C3, 74AHC245D, 74AHCT245D and 74LVC245AD. 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 RAM2E KiCad files?
From the ozw1z5rd/RAM2E repository on GitHub, at the commit this page was made from: the board is RAM2E.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.
Can I use the RAM2E design in my own project?
Its repository states no licence, so its author keeps all rights: ask ozw1z5rd before reusing the design.