751c3f7803
Single reference doc for every component: datasheet title/doc#/rev, source URL, and the pinout/key specs verified during capture (so it stands alone). PDFs are copyrighted -> kept git-ignored in hardware/datasheets/ (11 downloaded during this work: RP2350 hw-design, PCM5102A, THAT1240/1646, OPA1641, TPS65131, TPS7A4901/3001, ULN2003A, TQ2SA, PAM8302A). Manufacturer-direct hosts (Diodes/ST/onsemi/Winbond/Micro Crystal) block automated fetch -- their URLs are listed for manual download. Also lists tools (KiCad/SKiDL/ngspice) + the MIDI/USB/balanced-audio standards referenced. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
8 KiB
8 KiB
PM_K-1 Core Board — Reference Materials
Every datasheet and reference behind the design, with the verified facts extracted during
capture (pinouts, key specs) so this doc stands alone. PDFs are copyrighted, so they are not
committed — they live git-ignored in hardware/datasheets/ (regenerate by downloading from
the URLs below). Pinouts here were confirmed against these sources during schematic capture.
Download status: ✓ = saved in hardware/datasheets/ · ⛔ = manufacturer site blocks
automated download (open the URL in a browser) · 🔁 = host dropped the connection, retry.
Datasheet hosts that allow direct download (used here): TI
ti.com/lit,thatcorp.com,datasheets.raspberrypi.com, octopart's CDN, Adafruit's CDN. Diodes/ST/onsemi/Winbond/Micro Crystal block automated fetches — their URLs are below for manual download.
MCU & digital
| Part | Role | Doc | URL | Local | Verified |
|---|---|---|---|---|---|
| RP2350A | MCU (QFN-60) | Hardware Design w/ RP2350 (RP-008280) | https://datasheets.raspberrypi.com/rp2350/hardware-design-with-rp2350.pdf | ✓ RP2350_hardware-design.pdf |
minimal design: VREG_VIN→VREG_LX→3.3µH→DVDD, VREG_AVDD via 33Ω+4.7µF, 100nF/pin |
| RP2350A | MCU full datasheet | RP2350 Datasheet | https://datasheets.raspberrypi.com/rp2350/rp2350-datasheet.pdf | — | pinout via KiCad MCU_RaspberryPi:RP2350A symbol |
| W25Q128JV | 16MB QSPI flash | Winbond W25Q128JV | https://www.winbond.com/hq/product/code-storage-flash-memory/serial-nor-flash/?__locale=en&partNo=W25Q128JV | ⛔ | SO-8: 1=CS 2=IO1 3=IO2 4=GND 5=IO0 6=CLK 7=IO3 8=VCC (per RP2350 hw-design Fig 8) |
Power
| Part | Role | Doc | URL | Local | Verified |
|---|---|---|---|---|---|
| TPS65131 | dual boost/inverter → ±18V | TI SLVS493E | https://www.ti.com/lit/ds/symlink/tps65131.pdf | ✓ TPS65131.pdf |
24-VQFN pinout; Vref=1.213V; Vpos=Vref(1+R1/R2), Vneg=−Vref·R3/R4; L=4.7µH; D=MBRM120 |
| TPS7A4901 | +15V ultra-low-noise LDO | TI SBVS121E | https://www.ti.com/lit/ds/symlink/tps7a49.pdf | ✓ TPS7A4901.pdf |
8-pin: 1=OUT 2=FB 3=NC 4=GND 5=EN 6=NR/SS 7=DNC 8=IN; Vout=Vfb(1+R1/R2) |
| TPS7A3001 | −15V ultra-low-noise LDO | TI SBVS125D | https://www.ti.com/lit/ds/symlink/tps7a30.pdf | ✓ TPS7A3001.pdf |
same 8-pin pinout (negative) |
| AP2112K-3.3 | 3V3 LDO | Diodes AP2112 | https://www.diodes.com/assets/Datasheets/AP2112.pdf | ⛔ | SOT-23-5: 1=VIN 2=GND 3=EN 4=NC 5=VOUT (confirm) |
Audio chain
| Part | Role | Doc | URL | Local | Verified |
|---|---|---|---|---|---|
| THAT1240 | balanced line receiver (0 dB) | THAT 600035 rev05 | https://thatcorp.com/datashts/THAT_1240-Series_Datasheet.pdf | ✓ THAT1240-43-46_receiver.pdf |
SO-8: 1=Ref 2=In− 3=In+ 4=Vee 5=Sense 6=Vout 7=Vcc 8=NC; gains 1240=0dB/1243=−3/1246=−6; 2nd-src INA134/SSM2141 |
| THAT1646 | balanced line driver (+6 dB) | THAT 600078 rev07 | https://thatcorp.com/datashts/THAT_1606-1646_Datasheet.pdf | ✓ THAT1606-1646_driver.pdf |
SO-8: 1=Out− 2=Sns− 3=Gnd 4=In 5=Vee 6=Vcc 7=Sns+ 8=Out+; 4–18V; 2nd-src DRV134/SSM2142 |
| OPA1641 | JFET Hi-Z DI buffer | TI SBOS484D | https://www.ti.com/lit/ds/symlink/opa1641.pdf | ✓ OPA1641-42-44.pdf |
SO-8: 1=NC 2=−IN 3=+IN 4=V− 5=NC 6=OUT 7=V+ 8=NC; ±2.25–18V |
| OPA1612 | dual op-amp (filter + summer) | TI SBOS450 | https://www.ti.com/lit/ds/symlink/opa1612.pdf | ⛔ (TI) | standard dual pinout: 1=OUTA 2=−INA 3=+INA 4=V− 5=+INB 6=−INB 7=OUTB 8=V+ (confirmed via OPA164x sheet) |
| PCM5102A | I²S DAC (click) | TI SLAS859C | https://www.ti.com/lit/ds/symlink/pcm5102a.pdf | ✓ PCM5102A.pdf |
TSSOP-20 pinout; 2.1Vrms GND-centered; MCLK-less: SCK→GND (internal PLL) |
Indicators / MIDI / speaker (DNP)
| Part | Role | Doc | URL | Local | Verified |
|---|---|---|---|---|---|
| LM393 | SIG/CLIP comparator | TI | https://www.ti.com/lit/ds/symlink/lm393.pdf | ⛔ (TI) | standard 8-pin: 1=OUT1 2=−IN1 3=+IN1 4=V− 5=+IN2 6=−IN2 7=OUT2 8=V+ |
| H11L1 | MIDI opto-isolator IN | onsemi H11L1M | https://www.onsemi.com/pdf/datasheet/h11l1m-d.pdf | ⛔ | 6-pin: 1=A 2=C 3=NC 4=GND 5=VO 6=VCC (standard; reconfirm) |
| 74LVC14 | MIDI OUT/THRU buffer | TI SN74LVC14A | https://www.ti.com/lit/ds/symlink/sn74lvc14a.pdf | ⛔ (TI) | hex Schmitt inverter, standard 14-pin (1A/1Y…6A/6Y, 7=GND, 14=VCC) |
| PAM8302A | monitor speaker amp | Diodes DS41333 | https://www.diodes.com/assets/Datasheets/PAM8302A.pdf | ✓ PAM8302A.pdf (via Adafruit CDN) |
SO-8: 1=SD 2=NC 3=IN+ 4=IN− 5=VO+ 6=VDD 7=GND 8=VO−; gain=20·log(150k/(10k+RIN)) |
RTC / relays / connectors / protection
| Part | Role | Doc | URL | Local | Verified |
|---|---|---|---|---|---|
| RV-8803-C7 | I²C RTC | Micro Crystal (App Manual rev 1.6) | https://www.microcrystal.com/fileadmin/Media/Products/RTC/Datasheet/RV-8803-C7.pdf · App: https://www.microcrystal.com/fileadmin/Media/Products/RTC/App.Manual/RV-8803-C7_App-Manual.pdf | 🔁 | 8-WCDFN: 1=SDA 2=CLKOUT 3=VDD 4=CLKOE 5=VSS 6=/INT 7=EVI 8=SCL; single VDD; ~240nA |
| ULN2003A | relay driver | TI SLRS027T | https://www.ti.com/lit/ds/symlink/uln2003a.pdf | ✓ ULN2003A.pdf |
in 1B–7B=1–7, GND=8, COM=9, out 7C–1C=10–16 |
| TQ2SA-5V | DPDT signal relay (×3) | Panasonic TQ-SMD | octopart CDN: https://datasheet.octopart.com/TQ2SA-5V-Panasonic-datasheet-18347.pdf · mfr: https://industrial.panasonic.com/ww/products/pt/tq | ✓ TQ2SA_TQ-SMD_relay.pdf |
coil 1/10; pole1 COM=3 NC=4 NO=2; pole2 COM=8 NC=7 NO=9; single-side-stable, gold |
| USBLC6-2SC6 | USB ESD | ST | https://www.st.com/resource/en/datasheet/usblc6-2.pdf | ⛔ | SOT-23-6: I/O1=1&6, GND=2, I/O2=3&4, VBUS=5 |
| USB-C receptacle | USB2.0 conn (GCT USB4085) | GCT | https://gct.co/files/drawings/usb4085.pdf | ⛔ | USB2.0 subset: VBUS, GND, CC1/CC2, D+/D−, SHIELD (per KiCad USB_C_Receptacle) |
Passives & discretes
| Part | Role | URL | Local |
|---|---|---|---|
| ABM8 12 MHz crystal | RP2350 clock | https://abracon.com/Resonators/ABM8.pdf | ⛔ |
| Würth 7447789004 / EPCOS B82462-G4472 (4.7µH) | switcher inductors | https://www.we-online.com/components/products/datasheet/7447789004.pdf | ⛔ |
| Abracon AOTA-B201610S3R3 (3.3µH) | RP2350 core SMPS inductor | https://abracon.com/Magnetics/AOTA.pdf | ⛔ |
| MBRM120 | Schottky rectifier (switcher) | https://www.onsemi.com/pdf/datasheet/mbrm120-d.pdf | ⛔ |
| BAT54 | Schottky (RTC diode-OR, peak-detect) | https://www.onsemi.com/pdf/datasheet/bat54lt1-d.pdf | ⛔ |
| 1N4148WS | fast diode (input clamps, MIDI) | https://www.onsemi.com/pdf/datasheet/1n4148ws-d.pdf | ⛔ |
| Bourns 3296W | output level-cal trimmer | https://www.bourns.com/docs/Product-Datasheets/3296.pdf | ⛔ |
| Keystone 1066 | CR2032 holder | https://www.keyelco.com/userAssets/file/M65p23.pdf | ⛔ |
| Murata BLM18 / Würth | ferrite bead (USB VBUS) | https://www.murata.com/products/productdetail?partno=BLM18KG121SN1 | ⛔ |
Tools used (open-source)
- KiCad 9 — schematic/PCB + symbol libs (the RP2350A, USB-C, header symbols came from here). https://www.kicad.org/ · docs: https://docs.kicad.org/
- SKiDL — code-defined schematics (our
hardware/eda/circuits/*.py). https://devbisme.github.io/skidl/ - ngspice — analog simulation (
hardware/eda/sim/*.cir). https://ngspice.sourceforge.io/ - Pinned in
hardware/eda/Containerfile(reproducible).
Standards / app-notes referenced
- MIDI electrical spec (incl. 3.3 V TRS Type-A): https://midi.org/specs
- USB-C / USB 2.0 device (CC pulldowns, D± 90 Ω diff pair): https://www.usb.org/documents
- Balanced-audio interfacing (CMRR, build-out, ground-lift): THAT Corp app notes https://thatcorp.com/Audio_Design_Resources.php
Verification policy: every IC pinout above was confirmed against its primary datasheet at capture time (see commit history / per-block files), except where marked "standard" / "confirm" — those use the universal pinout for the part and should get a final datasheet cross-check at layout.