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

Part info cross-check

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.

Issues found

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.
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.

Footprint check What matches

The layout contains 16 pads, matching the datasheet’s 16-pin DIP package.
Pad numbering also appears to match the required 1-16 set.

What I could not fully verify from the available layout data

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

Recommended corrected summary

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-DIP vs 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

5 days

Ready.

Reviews

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