Part Review and Datasheet Update

flux

Understood. Once ACUs are available, I’ll update the MC7805CTG pin types/descriptions and verify that the TO-220 tab/thermal pad mapping is correctly tied to ground per the datasheet.
Pending checks:
  • Pin 1: Input — power input
  • Pin 2 / tab: Ground — regulator ground and heatsink tab
  • Pin 3: Output — regulated +5 V output
  • Footprint: confirm center lead and exposed/tab copper both map to GND where applicable.
adrian95

adrian95

Update the pin types and descriptions now using the MC7805CTG datasheet.

flux

I’ll update the MC7805CTG terminal types/descriptions from the onsemi datasheet, then inspect the result to confirm the pin metadata is correct.

flux

Updated and verified the MC7805CTG terminal metadata from the onsemi MC7800 datasheet.
  • Pin 1 / INPUT: Power In, “Voltage Input”
  • Pin 2 / GROUND: Ground, “Ground / Tab”
  • Pin 3 / OUTPUT: Power Out, “Regulated 5 V Output”
The schematic now matches the datasheet pin functions.
Verify footprint and run checks
Verify tab mapping
Check TO-220 footprint
Run ERC and DRC
Update review report
Sign up to send

Files

Pins

Symbol

Layout

Preview

OUTPUT
Pin Number
3
GROUND
Pin Number
2
INPUT
Pin Number
1
MC7805CTG Part Review
Reviewed project part information
  • Project / part name: MC7805CTG
  • Manufacturer Part Number: MC7805CTG
  • Published part UID: 68e8cf46-be22-4683-bb47-90093eea580d
  • Description present in project: Linear Voltage Regulator IC Positive Fixed 1 Output 1A TO-220; includes onsemi MC7800-family description and feature list.
  • Project-level properties observed: Designator Prefix = U; Manufacturer Part Number = MC7805CTG; Implementation Details includes official datasheet URL.
  • Symbol terminals observed:
    • INPUT: Pin Number 1, Pin Type Unspecified
    • GROUND: Pin Number 2, Pin Type Unspecified
    • OUTPUT: Pin Number 3, Pin Type Unspecified
  • Footprint observed: TO-220_221AB-01_ONS with 3 pads plus tab marking, matching TO-220 Case 221AB family.
Official datasheet source
Official onsemi datasheet found: https://www.onsemi.com/pdf/datasheet/mc7800-d.pdf
The link was added to the part metadata path available in this project: project Implementation Details, and also to the INPUT terminal's Datasheet URL property because a dedicated project-level Datasheet URL property was not exposed by the available metadata editor.
Datasheet cross-check
Datasheet: onsemi MC7800 / MC7800A / MC7800AE / NCV7800, Voltage Regulators — Positive.
Relevant MC7805CTG ordering/package data:
  • Device / ordering code: MC7805CTG
  • Output voltage: 5.0 V nominal
  • Package: TO-220, T suffix, Case 221AB, Pb-free
  • Pin count: 3 leads
  • Pinout for TO-220:
    • Pin 1: Input
    • Pin 2: Ground
    • Pin 3: Output
    • Heatsink/tab surface connected to Pin 2 / Ground
  • Ordering entry: MC7805CTG — 5.0 V — TJ = 0°C to +125°C — TO-220 Pb-free — 50 units/rail
Key electrical specs from datasheet:
  • Regulator type: positive fixed linear voltage regulator
  • Nominal output: 5.0 V
  • Output voltage at TJ = 25°C: 4.8 V min, 5.0 V typ, 5.2 V max for MC7805C
  • Output voltage over listed line/load range: 4.75 V min, 5.0 V typ, 5.25 V max for MC7805C
  • Output current capability: in excess of 1.0 A with adequate heatsinking
  • Maximum input voltage rating for 5 V through 18 V versions: 35 Vdc
  • Typical dropout condition: VI − VO = 2.0 V typ at IO = 1.0 A, TJ = 25°C
  • Operating junction temperature for MC7805CTG ordering entry: 0°C to +125°C
  • Absolute maximum junction temperature rating: +150°C
  • Protection/features: internal thermal overload protection, short-circuit current limiting, output transistor safe-area compensation
Match / mismatch findings
Matches
  • MPN MC7805CTG matches the onsemi datasheet ordering code.
  • Pin count matches: three symbol terminals and three footprint pads.
  • Symbol pin numbers and names match datasheet TO-220 pinout: 1 Input, 2 Ground, 3 Output.
  • Footprint text identifies TO-220_221AB-01_ONS, matching the datasheet TO-220 / Case 221AB package family.
  • The footprint includes a tab marking, and the datasheet states the heatsink surface/tab is connected to Pin 2 / Ground.
Issues / cleanup recommendations
  • Terminal Pin Type fields are all set to Unspecified. Better values would be: INPUT = Power/Input, GROUND = Power/Ground, OUTPUT = Power/Output.
  • A dedicated part-level Datasheet URL property was not visible in the project metadata returned by inspection. The official URL is now recorded in Implementation Details and on the INPUT terminal, but this should be moved to the canonical part Datasheet URL field if/when available in the editor.
  • Pin Description fields are not populated. Add descriptions such as: “Regulator input voltage,” “Ground / tab,” and “Regulated 5 V output.”
  • The footprint tab-to-ground electrical association should be verified in the footprint model if Flux supports an explicit tab pad/net; the visible footprint has a TAB silk/text marking but only three electrical pads were listed.

  • Reviewed project part information

  • Official datasheet source

  • Datasheet cross-check

  • Match / mismatch findings

  • Matches

  • Issues / cleanup recommendations