Shortlist IC part numbers by parametric spec constraints, ranked by how many constraints each part satisfies, then by headroom past those thresholds, and spread across device families. Each constraint is {canonical, op: gte|lte|eq|range, value, unit?}. Returns per-constraint pass/fail/unknown, plus matched (parts that qualified) vs returned (parts in this response) — when they differ this is a ranked page, not the full set. canonical MUST be one of the exact names below (case-sensitive): abs_max_current, abs_max_voltage, adc_resolution, block_erase_time, breakdown_voltage_ds, channel_count, clamping_voltage, clock_frequency, cmrr, cmti, coil_power, coil_resistance, coil_voltage, collector_emitter_voltage, contact_current, contact_resistance, core_size, cpu_speed, current_rating, dark_current, data_rate, data_retention, dc_resistance, drain_current, driver_count, dropout_voltage, dynamic_range, eeprom_size, emitter_base_voltage, fall_time, forward_current, forward_voltage, gain_bandwidth, gate_charge, impedance, input_bias_current, input_capacitance, input_offset_current, input_offset_current_drift, input_offset_voltage, input_offset_voltage_drift, input_voltage_noise_density, insertion_loss, io_count, isolation_voltage, junction_capacitance, load_capacitance, memory_size, operate_time, operating_frequency, operating_temperature, output_capacitance, output_count, output_current, output_noise_voltage, output_power, output_voltage, output_voltage_high, output_voltage_low, page_program_time, peak_pulse_current, power_dissipation, program_erase_cycles, program_memory_size, propagation_delay, psrr, quiescent_current, ram_size, rds_on, receiver_count, rectified_current, release_time, response_time, reverse_leakage_current, reverse_recovery_time, reverse_transfer_capacitance, reverse_voltage, rise_time, sample_rate, sector_erase_time, sensitivity, settling_time, slew_rate, standby_current, supply_voltage_range, switching_frequency, switching_voltage, vgs_threshold, zener_voltage

Read canonical extracted specs (min/typ/max, unit, conditions) for known IC part numbers from a pre-extracted parametric index — not from datasheet text. This is the cheapest and most precise source for numeric parameters where it has coverage. Optionally restrict to specific canonical parameter names. A part absent from results (with a "No specs found" warning) means no index coverage, not that the datasheet lacks the parameter — fall back to lookup for that part.

Relative price tier, stock posture, and library class for a set of IC part numbers (a ranking from a distributor snapshot, not a live quote).

Search the datasheet corpus; returns hit records (metadata + snippet, each with an opaque ref). Pass a ref list to get_segments for full content. If you already know the part number(s), prefer lookup — it fuses this search with get_segments in one call and groups full content per part. Use search when the part is unknown, or to triage snippets before pulling full content. For part-specific queries, pass scope='device:' (e.g. scope='device:NE5532') to restrict hits to that part and avoid cross-part contamination.

One-shot spec/section retrieval: full content of the most relevant datasheet segments for one or more parts (fuses search+get_segments). Already groups results per part (via parts), so prefer lookup over search when you know the part(s).

Expand opaque ref tokens (from search/lookup) into full datasheet segment content.

Fetch datasheet figure images (PNG/JPEG) for opaque ref tokens obtained from search/lookup/get_segments. Returns each image plus its caption/description/page metadata. Only type='image' segments have image data; a ref that is not one comes back as an error record whose available_images lists the document's figures nearest that ref's page and section, closest first.