TC4420 Part Review
Worked for 2 mins 52 sec
Created a project doc
TC4420CPA Part Review
Reviewed available part information for the published Flux part TC4420CPA, including MPN, manufacturer, package, pin count, description, pro...
Updated the part’s Datasheet URL to the official Microchip TC4420/TC4429 PDF and created the full review in TC4420CPA Part Review.
Open items:
- Pin numbers/names match the datasheet, but pin descriptions and electrical pin types are missing/unspecified.
- Footprint topology matches PDIP-8, but pad sizes appear effectively zero/non-manufacturable; I filed a part quality issue.
Suggested next steps:
- Populate terminal pin descriptions/types from the datasheet.
- Repair the PDIP-8 through-hole pad geometry.
- Re-run part review checks after the metadata/footprint fixes.
Update all terminal pin descriptions and electrical pin types from the datasheet.
Thought for 6 sec
I’ll update each terminal’s Pin Description and Pin Type from the official Microchip pinout, then verify the properties on the schematic.
Worked for 58 sec
Updated and verified all 8 terminal Pin Description and Pin Type properties from the Microchip TC4420/TC4429 datasheet.
Open items:
- The known PDIP footprint pad-size issue remains unresolved.
Suggested next steps:
- Repair the PDIP-8 through-hole footprint pad geometry.
- Re-run part review checks after the footprint fix.
Fix footprint and checks
Fix PDIP footprint
Run part checks
Update review file
Check package dimensions
Refine this doc
Ask about this doc
TC4420CPA Part Review
Scope
Reviewed available part information for the published Flux part
TC4420CPA, including MPN, manufacturer, package, pin count, description, project properties, schematic terminals, and PCB footprint geometry. Cross-checked against the official Microchip TC4420/TC4429 datasheet.Datasheet
- Existing Datasheet URL before review:
http://uk.rs-online.com/web/p/products/6811124P - Updated Datasheet URL:
https://ww1.microchip.com/downloads/en/DeviceDoc/21419D.pdf - Source: Microchip TC4420/TC4429 datasheet, document 21419D.
Existing Part Metadata After Review
- Manufacturer Part Number:
TC4420CPA - Manufacturer Name:
Microchip - Package or Case Code:
8-PDIP - Designator Prefix:
IC - Part Type:
Integrated Circuit - Published Part UID:
20b5060f-0f8d-4aa9-b60f-845f8987b15e - Project description: low-side, non-inverting MOSFET gate driver, 6 A peak, 4.5 V to 18 V supply, 8-PDIP.
Key Datasheet Specs
- Function: single non-inverting MOSFET gate driver.
- Output current: 6 A peak typical.
- Operating supply: 4.5 V to 18 V.
- Absolute maximum supply: +20 V.
- Input compatibility: TTL/CMOS compatible.
- Input thresholds: VIH min 2.4 V, VIL max 0.8 V.
- Rise/fall time: 25 ns typical, 35 ns max at 25 C with CL = 2500 pF; up to 60 ns max over temperature.
- Temperature grade for
C: 0 C to +70 C. - Package for
PA: 8-lead 300 mil Plastic DIP. - PDIP package reference: JEDEC MS-001 / Microchip C04-018.
Datasheet Pinout vs Flux Symbol
Table
| Pin | Datasheet name | Datasheet function | Flux terminal | Result |
|---|---|---|---|---|
| 1 | VDD | Supply input | VDD_1 | Match |
| 2 | INPUT | Control input | INPUT | Match |
| 3 | NC | No connection | NC | Match |
| 4 | GND | Ground | GND_1 | Match |
| 5 | GND | Ground | GND_2 | Match |
| 6 | OUTPUT | CMOS push-pull output | OUTPUT_1 | Match |
| 7 | OUTPUT | CMOS push-pull output | OUTPUT_2 | Match |
| 8 | VDD | Supply input | VDD_2 | Match |
Datasheet note: duplicate VDD, GND, and OUTPUT pins must both be connected for proper operation.
Symbol and Terminal Metadata Findings
- Pin numbering and terminal names match the official 8-pin PDIP/SOIC/CERDIP pinout.
- Pin descriptions are not populated on the Flux terminals.
- Pin Type is
Unspecifiedon all terminals; recommended types are: VDD = Power In, GND = Ground, INPUT = Input, OUTPUT = Output, NC = Not Connected. - Grouping/sections are not populated; useful groups would be Power, Ground, Logic Input, Driver Output, and No Connect.
Footprint Cross-Check
The PCB footprint appears to use the correct 8-pin DIP topology:
- 4 pins per side.
- 2.54 mm pitch along each row.
- Approximately 7.94 mm row spacing, consistent with an 8-lead 300 mil PDIP land pattern region.
- Pin 1 is indicated by a rectangular pad and silkscreen chamfer/notch treatment.
However, the computed pad size is approximately
0.00116 mm x 0.00116 mm, and pads do not visibly render in the flat footprint view. This is not manufacturable for an 8-PDIP through-hole part. A practical PDIP footprint should have plated through-holes and annular pads sized for the lead dimensions and fabrication capabilities, commonly around a 0.8-1.0 mm drill with around 1.5-1.8 mm pad diameter depending on fab rules.Mismatches / Issues Flagged
- Datasheet URL was not the official datasheet PDF; updated to the official Microchip PDF.
- Pin names and pin numbers match the datasheet.
- Pin descriptions are missing.
- Pin electrical types are all
Unspecifiedinstead of functional types. - Footprint pad placement/topology is broadly correct for PDIP-8, but pad sizes are effectively zero and therefore not manufacturable.
- A part quality issue was filed for the footprint pad-size problem.
Recommended Follow-Up Fixes
- Populate Pin Description and Pin Type properties for all terminals.
- Repair the PDIP-8 footprint pad geometry with proper plated through-hole drill and annular pad sizes.
- Re-run part review checks after metadata and footprint repair.
Scope
Datasheet
Existing Part Metadata After Review
Key Datasheet Specs
Datasheet Pinout vs Flux Symbol
Symbol and Terminal Metadata Findings
Footprint Cross-Check
Mismatches / Issues Flagged
Recommended Follow-Up Fixes
