MiniNDP
MiniNDP is an open source PCB design by bkw777: a 2-layer, 60 × 34 mm board with 15 components (12 distinct parts). It is built around the 74HC238PW,118, 74HC4040PW,118, 74HC573PW,118, AS6C4008-55STIN and more.
Reproduction & documentation of Node Systems DATAPAC
This repo documents the NODE Systems DATAPAC, rampac, and a new clone, the MiniNDP.
The NODE Systems DATAPAC/rampac was a popular ram disk peripheral for TRS-80 / TANDY Models 100, 102, & 200 computers.
The schematic and PCB below documents the DATAPAC.
rampac is a smaller later version of the same device that uses fewer larger sram chips and replaces most of the discrete logic IC's with a single PLD, but functions exactly the same.
Built around
Parts list
15 components, 12 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | 74HC238PW,118 HC238 | TSSOP-16 | U1 |
| 1 | 74HC4040PW,118 HC4040 | TSSOP-16 | U2 |
| 1 | 74HC573PW,118 HC573 | TSSOP-20 | U3 |
| 1 | AS6C4008-55STIN AS6C4008 | TSOP32-dual | U4 |
| 1 | 74LVC1G79GW,125 1G79 | SOT-353_SC-70-5 | U5 |
| 1 | AS6C4008-55STIN 2G00 | TSSOP-8_3x3mm_P0.65mm | U6 |
| 1 | 302-S401 Conn_02x20_Odd_Even | IDC-Header_2x20_P2.54mm_Vertical | J1 |
| 1 | Keystone_3028 | Keystone_3028_3034_bkw | BT1 |
| 1 | BAV70-7-F BAV70 | SOT-23 | DA1 |
| 3 | CL21B105KAFNNNE 1u | C_0805 | C2, C3, C4 |
| 2 | C3216X5R1E476M160DC 47u | C_1206 | C5, C6 |
| 1 | RMCF0805FT47K0 47k | R_0805 | R2 |
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