74x374 Specimen Tile
About the 74x374 Specimen Tile PCB
74x374 Specimen Tile is an open source PCB design by radiann-kswg, published on GitHub under the MIT license. It is a 2-layer board measuring 50 × 50 mm, with 75 components from 10 distinct parts.
By type, the board carries 35 resistors, 18 diodes, 17 switches and 1 capacitor.
From the project
収集した7400ICについて入手情報をまとめつつ、何か動く標本を作れないか模索しているリポジトリ
全タイルで共通の回路トポロジ。型番ごとに変わるのは電源ピン配線・未実装セル・シルクの 3 点だけ（→ ../REQUIREMENTS.md §2.3）。
- 版: 0.6（2026-09-17: 入力接点の LED 表示を廃止しスイッチのみに変更（REQUIREMENTS D25）。2026-09-16: Rd を 220Ω に変更（旧 1kΩ、REQUIREMENTS D16）。LED を負論理=赤／通常=白の2色に変更（D22）。クロック入力クリーンアップ回路（タクトスイッチ+RC+74x1G14）を実装・DRC/ERC検証済み（REQUIREMENTS §4.2/D17・D24）） - 対象: DIP-14 / DIP-16 / DIP-20（300mil）= 所持品の 118/120
スイッチで入力を +5V か GND のどちらかに必ず接続し、間に 220Ω を挟む（旧 1kΩ、REQUIREMENTS D16）。
74x374 Specimen Tile bill of materials (BOM)
75 components, 10 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | CC0603KRX7R7BB105 1uF YAGEO | C_0603_1608Metric | CK11 |
| 1 | 0603WAF1002T5E 10k UNI-ROYAL | R_0603_1608Metric | RC11 |
| 17 | MSS12C02LS-BB2.0 SHOU HAN | SW_SPDT_Shouhan_MSS12C02LS | SW1, SW2, SW3, SW4, SW5, SW6, SW7, SW8 +9 |
| 1 | EVQP2R02M Panasonic | SW_SPST_EVQP2_ShortPushTravel_H2.1mm | SWT11 |
| 1 | SN74LVC1G14DBVR Texas Instruments | SOT-23-5 | UG11 |
| 10 | KT-0603R RED Hubei KENTO | LED_0603_1608Metric | D1, D3, D4, D7, D8, D11, D13, D14 +2 |
| 8 | KT-0603W WHITE Hubei KENTO | LED_0603_1608Metric | D2, D5, D6, D9, D12, D15, D16, D19 |
| 1 | CC0603KRX7R9BB104 100nF YAGEO | C_0603_1608Metric | C1 |
| 18 | 0603WAF4701T5E 4.7k UNI-ROYAL | R_0603_1608Metric | R1, R2, R3, R4, R5, R6, R7, R8 +10 |
| 17 | 0603WAF2200T5E 220 UNI-ROYAL | R_0603_1608Metric | R21, R22, R23, R24, R25, R26, R27, R28 +9 |
74x374 Specimen Tile design files
The KiCad project lives in the radiann-kswg/7400SeriesCollection repository on GitHub; these links point at the commit this page was built from.
74x374 Specimen Tile: common questions
How big is the 74x374 Specimen Tile PCB?
The 74x374 Specimen Tile measures 50 × 50 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the 74x374 Specimen Tile?
75 components, from 10 distinct parts, with part numbers taken from the project's own BOM. The full bill of materials is listed on this page.
Where can I download the 74x374 Specimen Tile design files?
From the radiann-kswg/7400SeriesCollection repository on GitHub, which has the KiCad layout, the schematic and the BOM; the links under Design files point to each one.
Can I use the 74x374 Specimen Tile design in my own project?
Yes, under the terms of its MIT license, which radiann-kswg chose for the repository.