Part Datasheet Review and Update
Thought for 2 mins 25 sec
I reviewed the current part project against the available datasheet source and project data.
Summary
Table
| Area | Status | Notes |
|---|---|---|
| MPN | Good | LTD-5521AE matches the datasheet. |
| Manufacturer | Good | Lite-On Technology Corporation matches. |
| Datasheet URL property | Present, but not ideal | A Datasheet URL is already set, so there’s nothing to add. However, the current value is a Mouser product page, not the direct datasheet PDF. The linked PDF I found is PDF. |
| Package / pin count | Mostly good | Datasheet indicates 18 leads, dual-digit 0.56 in seven-segment LED display, common anode. Your project has 18 terminal components and 18 pads. |
| Description | Needs improvement | Current description is usable but not very specific. A better library-style description would be: Dual-digit 0.56 in common-anode seven-segment LED display, red-orange, right-hand decimal, 18-pin DIP. |
| Symbol pin numbering | Good | The project’s terminal pin numbers match the datasheet pinout. |
| Terminal naming | Mismatch found | Pins 13 and 14 are labeled as CATHODE_ANODE, but the datasheet says they are COMMON ANODE pins. |
| Pin types | Incomplete | All terminal components currently have Pin Type = Unspecified. |
| Pin descriptions | Missing | I do not see pin descriptions populated on the terminals. |
| Footprint | Partial check only | The footprint has 18 pads, which is consistent, but the exposed layout data did not include enough geometry detail to verify pad pitch/body outline against the datasheet dimensions. |
Table
| Spec | Value |
|---|---|
| Device type | Dual-digit seven-segment LED display |
| Configuration | Common anode |
| Digit height | 0.56 in / 14.22 mm |
| Color | Red-orange |
| Decimal | Right-hand decimal |
| Pin count | 18 |
| Forward voltage | 2.0 V min, 2.6 V max at 20 mA |
| Continuous forward current | 25 mA max per chip |
| Peak forward current | 100 mA max per chip |
| Power dissipation | 75 mW max per chip |
| Peak wavelength | 630 nm typ |
| Dominant wavelength | 621 nm typ |
| Operating temperature | -35°C to +85°C |
The pin map in the project matches the datasheet numbering exactly, which is the most important verification step for a part project audit .
Table
| Pin | Datasheet function | Project status |
|---|---|---|
| 1 | CATHODE E (DIGIT 1) | Match |
| 2 | CATHODE D (DIGIT 1) | Match |
| 3 | CATHODE C (DIGIT 1) | Match |
| 4 | CATHODE DP (DIGIT 1) | Match |
| 5 | CATHODE E (DIGIT 2) | Match |
| 6 | CATHODE D (DIGIT 2) | Match |
| 7 | CATHODE G (DIGIT 2) | Match |
| 8 | CATHODE C (DIGIT 2) | Match |
| 9 | CATHODE DP (DIGIT 2) | Match |
| 10 | CATHODE B (DIGIT 2) | Match |
| 11 | CATHODE A (DIGIT 2) | Match |
| 12 | CATHODE F (DIGIT 2) | Match |
| 13 | COMMON ANODE (DIGIT 2) | Name mismatch in project |
| 14 | COMMON ANODE (DIGIT 1) | Name mismatch in project |
| 15 | CATHODE B (DIGIT 1) | Match |
| 16 | CATHODE A (DIGIT 1) | Match |
| 17 | CATHODE G (DIGIT 1) | Match |
| 18 | CATHODE F (DIGIT 1) | Match |
- Pin 13 should be COMMON ANODE (DIGIT 2), not
CATHODE_ANODE_(DIGIT_2). - Pin 14 should be COMMON ANODE (DIGIT 1), not
CATHODE_ANODE_(DIGIT_1). - All 18 terminals still have Pin Type = Unspecified.
- Pin Description fields appear to be missing.
- Package or Case Code is not present in the project properties.
- The current Datasheet URL is set, but it points to a distributor product page instead of the datasheet PDF. The review workflow recommends verifying that this property points to the canonical datasheet PDF when possible .
For this part, I’d recommend these metadata updates:
- Keep Manufacturer Part Number = LTD-5521AE
- Keep Manufacturer Name = Lite-On
- Keep Designator Prefix = DS
- Improve Description
- Add Package or Case Code = 18-DIP or a more exact package string if you want the library entry to be stricter
- Prefer the direct datasheet PDF URL over the Mouser product page for Datasheet URL
For terminal elements, the best-practice audit flow is to ensure exact pin numbers, correct names, and populated pin metadata such as Pin Type and Pin Description .
For this display, I’d set:
- Segment cathodes: Pin Type = Passive or Unspecified depending on your symbol conventions
- Common anodes: Pin Type = Power In
- Add short pin descriptions like:
Segment A cathode, digit 1Segment DP cathode, digit 2Common anode, digit 1
If you want, I can take care of the project-property side of this review next, starting with the datasheet/property cleanup that’s in scope for me.
