Part Information Review and Update
1:57
Considering datasheet queries.
Reviewing the bill of materials.
Analyzing the schematic.
Analyzing the PCB layout.
Looking for "Official datasheet details for Bourns 4116R-1-221LF: exact MPN, manufacturer, package, pin count, description, resistance value, tolerance, power rating, resistor network type, package dimensions, and pin functions/pin numbering for the 8-pin DIP isolated resistor array." in 4100R.pdf
Analyzing the PCB layout.
Looking for "For Bourns 4116R-1-221LF, provide the key electrical specs and ratings: resistance tolerance options for this exact suffix, operating temperature range, maximum working voltage, package power derating, and any marking or package style notes relevant to a part-library summary." in 4100R.pdf
Cross-checking footprint.
I reviewed the part against the Bourns datasheet and the current part project.
Overall result
- Datasheet URL already exists, so no web search or property update was needed.
- The MPN and manufacturer are correct.
- The biggest metadata issue is the package property: the project says
8-DIP, but the datasheet identifies this part as a 16-pin molded DIP package. The 4116R is an 8-resistor isolated network in a 16-pin DIP, not an 8-pin DIP. The datasheet also confirms the pin pairing is 1-16, 2-15, 3-14, 4-13, 5-12, 6-11, 7-10, 8-9
Reviewed properties
| Field | Current project | Datasheet check | Status |
|---|---|---|---|
| MPN | 4116R-1-221LF | Matches official ordering code | OK |
| Manufacturer | Bourns | Datasheet says Bourns, Inc. | OK |
| Datasheet URL | http://www.bourns.com/pdfs/4100R.pdf | Official Bourns datasheet URL already present | OK |
| Package or Case Code | 8-DIP | Datasheet says 16-pin molded DIP, low-profile thick-film network | Mismatch |
| Part Type | Resistors | Functionally this is a resistor network / isolated resistor array | Acceptable, but could be more specific |
| Designator Prefix | RN | Appropriate for resistor network | OK |
| Description | "Bourns Isolated Resistor Array 220 +/-2% 8 Resistors, 2.25W Total, DIP package 4100R Through Hole" | Mostly correct, but package wording is too vague and should clearly say 16-pin DIP | Minor issue |
Key datasheet specs
| Spec | Datasheet value |
|---|---|
| Part family | 4100R Series thick-film molded DIP |
| Exact device | 4116R-1-221LF |
| Network type | 8 isolated resistors |
| Resistance | 220 Ω |
| Tolerance | ±2 % |
| Operating temperature | -55 °C to +125 °C |
| Max working voltage | 100 V |
| Package power rating | 2.25 W at 70 °C |
| Per-resistor power | 0.25 W at 70 °C |
| Package style | 16-pin low-profile molded DIP |
| Pin pitch | 2.54 mm |
| Row spacing | 6.71 mm nominal |
These values come directly from the Bourns datasheet for the 4100R family and the 4116R ordering code details
Schematic symbol check
What matches
- The symbol contains 16 terminals, which matches the datasheet’s 16 pins.
- The terminal numbering present in the project covers 1 through 16, which is correct for the 4116R package.
- All terminal Pin Type fields are currently
Unspecified.- For this part, each pin should be treated as Passive.
- There are no pin descriptions populated.
- Since this is an isolated resistor array, each pin description should identify which resistor pair it belongs to, for example:
- Pin 1: resistor to pin 16
- Pin 16: resistor to pin 1
- Pin 2: resistor to pin 15
- etc.
- Since this is an isolated resistor array, each pin description should identify which resistor pair it belongs to, for example:
- The symbol is only minimally defined as numbered terminals. That is electrically usable, but it is not yet well-documented as a library-quality part.
- The layout contains 16 pads, matching the datasheet’s 16-pin DIP package.
- Pad numbering also appears to match the required 1-16 set.
- Exact row spacing
- Exact pad/drill dimensions
- Exact body outline dimensions
- Pin-1 marker/orientation details
So the footprint is consistent at the pad-count/numbering level, but I cannot fully confirm the mechanical land pattern dimensions from the current inspection output alone.
Mismatches and gaps to fix
| Area | Issue | Severity |
|---|---|---|
| Project property | Package or Case Code = 8-DIP should be 16-pin DIP | High |
| Symbol metadata | All pins are Unspecified instead of Passive | Medium |
| Symbol documentation | Pin descriptions are missing | Medium |
| Description | Should explicitly say 16-pin DIP isolated resistor network | Low |
| Footprint verification | Mechanical dimensions not fully confirmed from current data | Medium |
A better part summary would be:
- 8-resistor isolated network, 220 Ω ±2 %, 16-pin through-hole molded DIP, 2.25 W total
That phrasing follows the datasheet more closely and avoids the current 8-DIP mistake
Bottom line
- Correct: MPN, manufacturer, resistor value, tolerance, resistor-count concept, total power concept, 16-pin symbol/pad count.
- Incorrect: Package property is wrong (
8-DIPvs actual 16-pin DIP). - Incomplete: pin types and pin descriptions.
- Partially verified: footprint numbering is right, but full mechanical footprint dimensions still need a deeper geometry check.
If you want, I can next:
- fix the Package or Case Code
- set all pin types to Passive
- add concise pin descriptions for all 16 pins
- tighten up the project description to match the datasheet exactly
Fix metadata issues
Verify footprint dimensions
Review all resistor networks
37 days
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