Part Information Review and Updates

3:18

Reviewing Datasheet Properties.

Consulting on Datasheet Updates.

Determining File Usage.

Checking if I can make the changes for you.

Searching the project.

Analyzing the schematic.

Analyzing the PCB layout.

Gathering project details.

Searching 3 domains.

Searching for properties.

Searching 3 domains.

Counting pin uncertainties.

Checking for datasheet URL.

Search complete — 249 results across 5 domains.

Running multiple web searches.

Analyzing the PCB layout.

Found 10 results.

Searching the project.

Searching for components.

Searching components.

Searching for terminals.

Searching components.

Searching for pin properties.

Searching 2 domains.

Checking Pin Description property.

Searching components.

Addressing missing pin details.

Search complete — 180 results across 1 domains.

Looking for "Part number, manufacturer, package variants, short description, USB version, UART function, supply/operating voltage, and operating temperature range for the CP2102N family." in cp2102n-datasheet.pdf

Looking for "Complete pin table for the CP2102N 20-pin GQFN or WFQFN package including pin 10 and the exposed pad, with pin names and functions." in cp2102n-datasheet.pdf

Looking for "Package and recommended land pattern details for the CP2102N 20-pin GQFN/WFQFN package, including body size, exposed pad, and any footprint notes." in cp2102n-datasheet.pdf

Looking for "Functions of pins GPIO0/CLK GPIO1/RS485 GPIO2/TXT GPIO3/RXT RSTb SUSPEND SUSPENDb WAKEUP VBUS VREGIN VDD D+ D- CTS RTS RXD TXD and GND for CP2102N." in cp2102n-datasheet.pdf

I reviewed the current part project for CP2102N-A02-GQFN20 against the official Silicon Labs datasheet and the existing symbol/footprint data. For part-project audits like this, the datasheet should be treated as the source of truth, the pin count must match exactly, and the exposed pad counts as a pin.

Datasheet URL

I found no existing Datasheet URL project property in the current part metadata.

Use this official URL:

https://www.silabs.com/documents/public/data-sheets/cp2102n-datasheet.pdf

Current project metadata vs datasheet

Summary

Item	Current project	Datasheet / official source	Status
MPN	`CP2102N-A02-GQFN20`	`CP2102N-A02-GQFN20`	Match
Manufacturer Name	Not found	Silicon Labs	Missing
Designator Prefix	`U`	`U` is appropriate for an IC-style part	OK
Datasheet URL	Not found	Official PDF found	Missing
Description	Not found	USB-to-UART bridge controller	Missing
Package property	Not found as property	20-pin QFN, 3.00 mm x 3.00 mm, 0.50 mm pitch, exposed pad GND	Missing

Key specs from the official datasheet

Spec	Value
Function	USB-to-UART bridge controller
USB	USB 2.0 compliant, full-speed (12 Mbps)
UART baud rate	300 baud to 3 Mbaud
VDD	3.0 V to 3.6 V
VIO	1.71 V to VDD
VREGIN	3.0 V to 5.25 V
Temperature range	-40 C to +85 C
Package	20-pin QFN, 3.00 mm x 3.00 mm, exposed pad to GND

Symbol audit What matches

The symbol names broadly line up with the CP2102N-A02-GQFN20 variant:
- GPIO1/RS485
- GPIO0/CLK
- D+, D-
- VDD, VREGIN, VBUS
- RSTb
- SUSPEND, SUSPENDb
- WAKEUP
- CTS, RTS, RXD, TXD
- GPIO3/RXT
- GPIO2/TXT
- GND and exposed-pad GND

Mismatches / issues

Issue	Finding	Expected
Missing pin	Pin 10 is missing from the symbol	Pin 10 = NC
Pin count	Symbol has pins 1-9, 11-20, EXP	Datasheet requires 1-20 plus exposed pad
Pin type typing	All terminals are currently `Bi-Directional`	Should be mixed: `Ground`, `Power In`, `Input`, `Output`, `Bi-Directional`, `Not Connected`
Pin descriptions	No `Pin Description` properties found	Each pin should have a short functional description

Pin-type corrections that are clearly needed

Pin	Datasheet function	Better Flux pin type
3, 20, EXP	GND	`Ground`
7	VREGIN	`Power In`
8	VBUS sense	`Input`
9	RSTb	`Input`
10	NC	`Not Connected`
11	SUSPENDb	`Output`
12	SUSPEND	`Output`
13	WAKEUP	`Input`
14	CTS	`Input`
15	RTS	`Output`
16	RXD	`Input`
17	TXD	`Output`
1, 2, 18, 19	GPIO / multifunction	`Bi-Directional`
4, 5	USB D+, D-	`Bi-Directional` is reasonable
6	VDD	borderline functional supply node; should not stay generic `Bi-Directional`

Footprint audit What matches

The footprint asset is WFQFN-20.kicad_mod.
The pad geometry is consistent with a 3 mm x 3 mm, 0.5 mm pitch QFN20 with center pad.
The exposed pad exists and is mapped to GND.
The overall footprint style looks compatible with the datasheet package.

Footprint mismatch

Issue	Finding	Expected
Missing pad mapping	The footprint asset includes pad 10, but the project terminal list does not	Symbol and footprint should both include pin 10 = NC

So the main footprint problem is not the pad shape itself - it is the symbol-to-footprint pin mapping completeness.

Pin-description audit

No Pin Description properties were found on the current terminals. That is incomplete for a reusable part project; short per-pin descriptions are recommended for auditability and symbol clarity.

Examples that should exist:

Pin 8: VBUS sense input
Pin 10: No connect
Pin 17: UART transmit output
Pin EXP: Exposed ground pad

Bottom line Good

MPN is correct.
Footprint family appears correct.
Exposed pad is present.
Most pin names align with the datasheet.

Problems to fix

Add missing project property: Datasheet URL
Add missing project property: Manufacturer Name = Silicon Labs
Add missing project description
Add missing package property
Add pin 10 = NC
Reclassify nearly all pin types from generic Bi-Directional
Add short pin descriptions for all pins

If you want, I can next give you a ready-to-apply correction list for all 21 terminals/properties in Flux-friendly form.

Give correction list

Fix pin metadata

Check missing pin 10

2 days

Ready.

Reviews

Ground
A common return path for electric current. Commonly known as ground.
jharwinbarrozo
20.5M
Net Portal
Wirelessly connects nets on schematic. Used to organize schematics and separate functional blocks. To wirelessly connect net portals, give them same designator. #portal
jharwinbarrozo
43.0M
Power Net Portal
Wirelessly connects power nets on schematic. Identical to the net portal, but with a power symbol. Used to organize schematics and separate functional blocks. To wirelessly connect power net portals, give them the same designator. #portal #power
jharwinbarrozo
11.4M
Generic Resistor
A generic fixed resistor ideal for rapid circuit topology development. Its footprint automatically adapts based on the selected package case code—supporting 0402, 0603, 0805, 1203, and many other standard SMD packages, as well as axial horizontal and vertical configurations. Save precious design time by seamlessly add more information to this part (value, footprint, etc.) as it becomes available. Standard resistor values: 1.0 ohm, 10 ohm, 100 ohm, 1.0k ohm, 10k ohm, 100k ohm, 1.0M ohm 1.1 ohm, 11 ohm, 110 ohm, 1.1k ohm, 11k ohm, 110k ohm, 1.1M ohm 1.2 ohm, 12 ohm, 120 ohm, 1.2k ohm, 12k ohm, 120k ohm, 1.2M ohm 1.3 ohm, 13 ohm, 130 ohm, 1.3k ohm, 13k ohm, 130k ohm, 1.3M ohm 1.5 ohm, 15 ohm, 150 ohm, 1.5k ohm, 15k ohm, 150k ohm, 1.5M ohm 1.6 ohm, 16 ohm, 160 ohm, 1.6k ohm, 16k ohm, 160k ohm, 1.6M ohm 1.8 ohm, 18 ohm, 180 ohm, 1.8K ohm, 18k ohm, 180k ohm, 1.8M ohm 2.0 ohm, 20 ohm, 200 ohm, 2.0k ohm, 20k ohm, 200k ohm, 2.0M ohm 2.2 ohm, 22 ohm, 220 ohm, 2.2k ohm, 22k ohm, 220k ohm, 2.2M ohm 2.4 ohm, 24 ohm, 240 ohm, 2.4k ohm, 24k ohm, 240k ohm, 2.4M ohm 2.7 ohm, 27 ohm, 270 ohm, 2.7k ohm, 27k ohm, 270k ohm, 2.7M ohm 3.0 ohm, 30 ohm, 300 ohm, 3.0K ohm, 30K ohm, 300K ohm, 3.0M ohm 3.3 ohm, 33 ohm, 330 ohm, 3.3k ohm, 33k ohm, 330k ohm, 3.3M ohm 3.6 ohm, 36 ohm, 360 ohm, 3.6k ohm, 36k ohm, 360k ohm, 3.6M ohm 3.9 ohm, 39 ohm, 390 ohm, 3.9k ohm, 39k ohm, 390k ohm, 3.9M ohm 4.3 ohm, 43 ohm, 430 ohm, 4.3k ohm, 43K ohm, 430K ohm, 4.3M ohm 4.7 ohm, 47 ohm, 470 ohm, 4.7k ohm, 47k ohm, 470k ohm, 4.7M ohm 5.1 ohm, 51 ohm, 510 ohm, 5.1k ohm, 51k ohm, 510k ohm, 5.1M ohm 5.6 ohm, 56 ohm, 560 ohm, 5.6k ohm, 56k ohm, 560k ohm, 5.6M ohm 6.2 ohm, 62 ohm, 620 ohm, 6.2k ohm, 62K ohm, 620K ohm, 6.2M ohm 6.8 ohm, 68 ohm, 680 ohm, 6.8k ohm, 68k ohm, 680k ohm, 6.8M ohm 7.5 ohm, 75 ohm, 750 ohm, 7.5k ohm, 75k ohm, 750k ohm, 7.5M ohm 8.2 ohm, 82 ohm, 820 ohm, 8.2k ohm, 82k ohm, 820k ohm, 8.2M ohm 9.1 ohm, 91 ohm, 910 ohm, 9.1k ohm, 91k ohm, 910k ohm, 9.1M ohm #generics #CommonPartsLibrary
jharwinbarrozo
1.5M
Generic Capacitor
A generic fixed capacitor ideal for rapid circuit topology development. You can choose between polarized and non-polarized types, its symbol and the footprint will automatically adapt based on your selection. Supported options include standard SMD sizes for ceramic capacitors (e.g., 0402, 0603, 0805), SMD sizes for aluminum electrolytic capacitors, and through-hole footprints for polarized capacitors. Save precious design time by seamlessly add more information to this part (value, footprint, etc.) as it becomes available. Standard capacitor values: 1.0pF, 10pF, 100pF, 1000pF, 0.01uF, 0.1uF, 1.0uF, 10uF, 100uF, 1000uF, 10000uF 1.1pF, 11pF, 110pF, 1100pF 1.2pF, 12pF, 120pF, 1200pF 1.3pF, 13pF, 130pF, 1300pF 1.5pF, 15pF, 150pF, 1500pF, 0.015uF, 0.15uF, 1.5uF, 15uF, 150uF, 1500uF 1.6pF, 16pF, 160pF, 1600pF 1.8pF, 18pF, 180pF, 1800pF 2.0pF, 20pF, 200pF, 2000pF 2.2pF, 22pF, 220pF, 2200pF, 0.022uF, 0.22uF, 2.2uF, 22uF, 220uF, 2200uF 2.4pF, 24pF, 240pF, 2400pF 2.7pF, 27pF, 270pF, 2700pF 3.0pF, 30pF, 300pF, 3000pF 3.3pF, 33pF, 330pF, 3300pF, 0.033uF, 0.33uF, 3.3uF, 33uF, 330uF, 3300uF 3.6pF, 36pF, 360pF, 3600pF 3.9pF, 39pF, 390pF, 3900pF 4.3pF, 43pF, 430pF, 4300pF 4.7pF, 47pF, 470pF, 4700pF, 0.047uF, 0.47uF, 4.7uF, 47uF, 470uF, 4700uF 5.1pF, 51pF, 510pF, 5100pF 5.6pF, 56pF, 560pF, 5600pF 6.2pF, 62pF, 620pF, 6200pF 6.8pF, 68pF, 680pF, 6800pF, 0.068uF, 0.68uF, 6.8uF, 68uF, 680uF, 6800uF 7.5pF, 75pF, 750pF, 7500pF 8.2pF, 82pF, 820pF, 8200pF 9.1pF, 91pF, 910pF, 9100pF #generics #CommonPartsLibrary
jharwinbarrozo
1.5M
Generic Inductor
A generic fixed inductor suitable for rapid circuit topology development. The footprint automatically adapts based on the selected package, supporting standard SMD sizes (e.g., 0402, 0603, 0805) as well as well-known inductor packages such as SDR1806, PA4320, SRN6028, and SRR1260. Standard inductor values: 1.0 nH, 10 nH, 100 nH, 1.0 µH, 10 µH, 100 µH, 1.0 mH 1.2 nH, 12 nH, 120 nH, 1.2 µH, 12 µH, 120 µH, 1.2 mH 1.5 nH, 15 nH, 150 nH, 1.5 µH, 15 µH, 150 µH, 1.5 mH 1.8 nH, 18 nH, 180 nH, 1.8 µH, 18 µH, 180 µH, 1.8 mH 2.2 nH, 22 nH, 220 nH, 2.2 µH, 22 µH, 220 µH, 2.2 mH 2.7 nH, 27 nH, 270 nH, 2.7 µH, 27 µH, 270 µH, 2.7 mH 3.3 nH, 33 nH, 330 nH, 3.3 µH, 33 µH, 330 µH, 3.3 mH 3.9 nH, 39 nH, 390 nH, 3.9 µH, 39 µH, 390 µH, 3.9 mH 4.7 nH, 47 nH, 470 nH, 4.7 µH, 47 µH, 470 µH, 4.7 mH 5.6 nH, 56 nH, 560 nH, 5.6 µH, 56 µH, 560 µH, 5.6 mH 6.8 nH, 68 nH, 680 nH, 6.8 µH, 68 µH, 680 µH, 6.8 mH 8.2 nH, 82 nH, 820 nH, 8.2 µH, 82 µH, 820 µH, 8.2 mH #generics #CommonPartsLibrary
jharwinbarrozo
15.6k
Terminal
An electrical connector acting as reusable interface to a conductor and creating a point where external circuits can be connected.
natarius
RMCF0805JT47K0
47 kOhms ±5% 0.125W, 1/8W Chip Resistor 0805 (2012 Metric) Automotive AEC-Q200 Thick Film #forLedBlink
jharwinbarrozo
1.2M
875105359001
10uF Capacitor Aluminum Polymer 20% 16V SMD 5x5.3mm #forLedBlink #commonpartslibrary #capacitor #aluminumpolymer #radialcan
jharwinbarrozo
1.2M
CTL1206FYW1T
Yellow 595nm LED Indication - Discrete 1.7V 1206 (3216 Metric) #forLedBlink
jharwinbarrozo
1.1M