datasheets

name

datasheets

description

Extract structured specifications from electronic component datasheet PDFs — pinouts, electrical characteristics, peripherals, topology, and features. Cache extractions per project for consumption by schematic and PCB analyzers. Primary consumer infrastructure for `kicad`, `emc`, `spice`, and `thermal` analyzers. Use this skill whenever the user asks to extract, verify, or read specs from a component datasheet; when analyzers need verified IC knowledge (EN pin thresholds, PG presence, USB peripheral speed); or when a review mentions datasheet coverage, extraction quality, or per-MPN specifications. Also triggers on "extract this datasheet", "what are the specs for MPN X", "verify datasheet extraction", or "check pin functions for part Y".

Datasheets Skill

Related Skills

Skill	Relationship
digikey / mouser / lcsc / element14	Producers — download the PDFs under <project>/datasheets/ that this skill extracts from
kicad	Primary consumer — VM-001/PU-001/FS-001/PP-001/LR-001/XT-001 + Phase 4b lookup detectors (AM-001/OV-001/TJ-001/FT-001/EX-001) query extractions via lookup(mpn) for verified-IC knowledge
emc	Consumer — switching-frequency, package-Rθ_JA, and operating-voltage data sharpen EMC heuristics
spice	Consumer — SPICE model presence + IBIS data feed simulation-readiness checks
thermal	Consumer — package Rθ_JA + junction temperature limits drive Tj estimates (TS-001..TJ-001)
bom	Indirect — coverage of structured extractions affects BOM verification confidence

Handoff guidance: This skill is consumer infrastructure. The typical flow is distributor skill downloads PDF → datasheets skill extracts → analyzer skill queries. Use this skill directly when (a) the user asks to extract or verify a specific MPN, (b) an analyzer reports trust_level: low and the gap is per-MPN extraction quality, or (c) a new MPN was added to the BOM and downstream detectors should pick up its verified specs. Don't run this skill in isolation if the user just wants a design review — call it from the kicad workflow at the "Sync datasheets" step instead.

Purpose

Extract structured, machine-readable specifications from component datasheet PDFs and make them available to analyzer skills. Works on whatever PDFs are downloaded under <project>/datasheets/ (downloads are owned by distributor skills like digikey, mouser, lcsc, element14).

Scope

This skill owns:

• Extraction schemas — canonical JSON structures for per-MPN specs. v1.4 ships 6 JSON Schema Draft 2020-12 schemas under schemas/ (base, pinout, spec_value, regulator, extraction, manifest) plus 5 v1.4 category extensions (diode, transistor, opamp, mcu, crystal). v1.3 cache format (EXTRACTION_VERSION in scripts/datasheet_extract_cache.py) is still read for compat.
• Typed access layer (v1.4) — datasheet_types/ package exposes DatasheetFacts, SpecValue, Pin, Pinout, lookup(), best(), trusted(), has_data(). Recommended for all new consumers.
• PDF page selection — heuristics to pick pages most likely to contain pinouts, e-chars, applications, SPICE models.
• Quality scoring — v1.4 uses a three-dimension rubric (pinout completeness, base completeness, category-extension completeness, 0–100 scale). v1.3 5-dimension weighted rubric still applies to legacy caches.
• Consumer APIs — scripts/datasheet_lookup.py for v1.4 typed access; scripts/datasheet_features.py for the v1.3 dict-shaped helpers (get_regulator_features, get_mcu_features, get_pin_function) — the v1.3 helpers dual-read v1.4 caches and translate to v1.3 dict shape for legacy detector code. Sunset planned for v1.6.
• Verification — datasheet_verify.py (v1.3, schema-vs-usage cross-check) plus datasheet_verify_v14_extraction (v1.4, power_domain references resolve, recommended ≤ absolute, regulator pin references exist).

Non-goals

• No PDF downloading. That is owned by distributor skills (digikey, mouser, lcsc, element14).
• No global library. Each project's extractions live in <project>/datasheets/extracted/. There is no shared cross-project cache.

Cache location

<project>/
  design.kicad_sch
  datasheets/
    TPS61023DRLR.pdf        # downloaded by distributor skills
    extracted/
      manifest.json         # extraction manifest (legacy name: index.json)
      TPS61023DRLR.json     # structured extraction (this skill's output)

Reference guides

• references/extraction-schema.md — canonical schema, every field defined
• references/field-extraction-guide.md — how to find each field in datasheets from common vendors (TI, ST, NXP, Espressif, Microchip)
• references/quality-scoring.md — rubric details, score thresholds
• references/consumer-api.md — how kicad/emc/spice/thermal consume extractions
• references/cache-layout.md — v1.4 cache directory convention (per-MPN files, _families/ reservation, staleness rules)

Entry-point scripts

• scripts/datasheet_extract_cache.py — v1.3 cache manager, resolver, indexer
• scripts/datasheet_page_selector.py — page selection heuristics (used by both v1.3 and v1.4 pipelines)
• scripts/datasheet_score.py — v1.3 extraction quality scoring
• scripts/datasheet_verify.py — cross-check extraction vs schematic usage (v1.3 + v1.4 verify_v14_extraction mode)
• scripts/datasheet_lookup.py — v1.4 typed lookup(mpn) → DatasheetFacts facade with staleness detection
• scripts/datasheet_features.py — v1.3 consumer helper API (dual-reads v1.4 caches via _derive_*_v14 translators)
• scripts/plan_extraction.py — v1.4 orchestration plan generator (Phase 3 extraction pipeline)
• scripts/merge_results.py — v1.4 per-task result validator + merger
• datasheet_types/ — v1.4 typed access layer package (DatasheetFacts, SpecValue, Pin, Pinout, lookup, best, trusted, has_data)

Extraction workflow

Run python3 skills/datasheets/scripts/plan_extraction.py <project> to generate an orchestration plan, then merge_results.py to validate and merge per-task outputs. Full scout→plan→dispatch→merge procedure: references/extraction-pipeline.md.

Consuming extractions (v1.4 typed API)

The recommended consumer surface is the typed lookup(mpn, cache_dir=...) facade plus the trust-gating helpers from datasheet_types. Import like:

import sys, pathlib
sys.path.insert(0, str(pathlib.Path(__file__).parent.parent / "datasheets"))
from datasheet_types import lookup, has_data, best, trusted

# Returns Optional[DatasheetFacts]. None on cache miss / stale PDF / low quality.
facts = lookup("TPS61023DRLR", cache_dir=pathlib.Path("datasheets/extracted"))
if facts is None:
    return  # heuristic-only path; no datasheet evidence available

# Field-level trust gating — every SpecValue list runs through has_data() / best() / trusted().
pu_range = facts.base.recommended_pullup_range  # Optional[list[SpecValue]]
if has_data(pu_range):
    # Most-trusted single value (first SpecValue meeting threshold, preserves extractor order).
    rec = best(pu_range, min_confidence="medium")  # Optional[SpecValue]
    if rec is not None and rec.min is not None:
        ...  # use rec.min, rec.max, rec.typ, rec.unit, rec.evidence.{page,section,confidence}

# All SpecValues at threshold (for multi-value fields like absolute_max).
hi_conf = trusted(facts.base.absolute_max.get("VDD", []), min_confidence="high")

Defensive patterns (mirrors kicad/SKILL.md § "Probing Analyzer JSON"):

• lookup() returns None on cache miss, stale PDF (PDF newer than extraction), or quality score below the configured floor. Always guard with if facts is None: return.
• Category extensions are optional on DatasheetFacts. facts.regulator is None when the part isn't in the regulator category — check before dereferencing.
• SpecValue lists can be None (field not extracted), [] (extracted but empty), or list[SpecValue]. has_data() collapses the first two to False; pair with best() / trusted() for confidence gating.
• SpecValue.min / .max / .typ are each Optional[float]. A SpecValue carrying only typ (no range) makes > / < comparisons against .min / .max raise TypeError — guard with explicit is not None chains on every numeric access.
• confidence is one of "low" / "medium" / "high". Calling best() / trusted() with any other string raises ValueError.

v1.3 compat shim

Legacy detectors still call get_regulator_features(mpn) / get_mcu_features(mpn) / get_pin_function(mpn, pin) from scripts/datasheet_features.py. These dual-read v1.4 caches and translate to the v1.3 dict shape. Sunset planned for v1.6 — new code should use lookup() directly.

When to trigger this skill

• Immediately after downloading datasheets via sync_datasheets_digikey.py, sync_datasheets_lcsc.py, or equivalent. Without extraction, IC-aware checks (VM-001 rail voltage, PS-001 power-good, PR-004 USB, DP-002 USB speed classification) fall back to heuristics on unknown ICs.
• Before running analyzers on a new project where datasheets are present but datasheets/extracted/ is empty — the analyzers won't produce the extractions themselves.
• When a review flags low trust level due to missing manufacturer evidence: extracting the ICs referenced by power regulators, MCUs, and high-speed peripherals typically flips trust_level: low → mixed or high.
• When a user asks for pin verification ("verify U1 pin names match datasheet") — this skill's cached extraction is the authoritative source.