Part Datasheet Verification

2:57

Planning for project updates.

Searching the project.

Reviewing the bill of materials.

Analyzing the schematic.

Analyzing the PCB layout.

Searching for properties.

Searching 2 domains.

Searching for terminal pin details.

Searching components.

Investigating project properties.

Search complete — 75 results across 2 domains.

Running multiple web searches.

Found 1 results.

Looking for "pin description pin configuration table PAT9125EL pins 1 2 3 4 5 6 7 8 9 VLD VDDA VDD VSS SCL SDA MOTION ID_SEL TEST" in PAT9125EL-TKITPAT9125EL-TKMT.pdf?ext=.pdf

Looking for "part number manufacturer package optical tracking miniature chip LGA 8 pin TKIT I2C TKMT SPI" in PAT9125EL-TKITPAT9125EL-TKMT.pdf?ext=.pdf

Looking for "features supply voltage VDD VLD interface resolution VCSEL operating temperature recommended operating conditions" in PAT9125EL-TKITPAT9125EL-TKMT.pdf?ext=.pdf

Looking for "package dimensions LGA8 3.2 x 3.5 footprint land pattern pin count" in PAT9125EL-TKITPAT9125EL-TKMT.pdf?ext=.pdf

Running design review.

Working.

Searching the project (2 questions).

Searching for context.

Searching 3 domains.

Searching for properties.

Searching 3 domains.

Inspecting pads numbers.

Searching 3 domains.

Searching for project details.

Searching 3 domains.

Clarifying project search.

Searching 3 domains.

Inspecting pad designators.

Search complete — 296 results across 5 domains.

I verified/set the Datasheet URL to the PixArt PAT9125EL-TKIT/TKMT datasheet, and the main mismatches are: VSS is typed as Power Out but should be Ground, Manufacturer Name and Part Type are missing, and all terminals lack Section, Pin Group, and Pin Orientation metadata. Full audit is in PAT9125EL-TKIT Part Datasheet Audit.

3 days

Set Datasheet URL to "https://www.epsglobal.com/Med..."

Set Datasheet URL to "https://www.epsglobal.com/Media-Library/EPSGlobal/Products/files/pixart/PAT9125EL-TKITPAT9125EL-TKMT.pdf?ext=.pdf"

3 days

adrian95

Looking at the datasheet of this component, can you group together pins by their functions? for example for Power, VDD, gnd_1 gnd_2 etc NOTE: If you group them, can you not add the same pin if you already added them in a group? You should know which pin function is common for its function

3 days

flux

1:33

Considering project modifications.

Analyzing the schematic.

Looking for "pin configuration pin description table pin numbers names functions VLD VDDA VDD VSS SCL SDA MOTION ID_SEL PAT9125EL TKIT" in PAT9125EL-TKITPAT9125EL-TKMT.pdf?ext=.pdf

Looking for "pin description power ground I2C interface pins LED motion ID_SEL" in PAT9125EL-TKITPAT9125EL-TKMT.pdf?ext=.pdf

Done — I grouped each existing pin into exactly one functional group: Power (VLD, VDDA, VDD), Ground (VSS), I2C Communication (SCL, SDA), and Control (MOTION, ID_SEL). I also corrected VSS to Ground; note the datasheet lists a backside TEST NC pin, but it is not currently present in the symbol.

Add TEST pin

Verify pin groups

Run ERC

Show pin groups

3 days

Set Section to "Power" on VLD, VDDA, and VDD, Set Pin Group to "Power" on VLD, VDDA, and VDD, and 20 more changes

Set VLD's Section to "Power"

Set VLD's Pin Group to "Power"

Set VLD's Pin Orientation to "Top"

Set VLD's Pin Description to "VCSEL laser anode"

Set VDDA's Section to "Power"

Set VDDA's Pin Group to "Power"

Set VDDA's Pin Orientation to "Top"

Set VDDA's Pin Description to "Analog supply/regulator output"

Set VDD's Section to "Power"

Set VDD's Pin Group to "Power"

Set VDD's Pin Orientation to "Top"

Set VDD's Pin Description to "IC main power supply"

Set VSS's Pin Type to "Ground"

Set VSS's Section to "Ground"

Set VSS's Pin Group to "Ground"

Set VSS's Pin Orientation to "Bottom"

Set VSS's Pin Description to "Chip ground"

Set SCL's Section to "Communication"

Set SCL's Pin Group to "I2C"

Set SCL's Pin Orientation to "Left"

Set SCL's Pin Description to "I2C clock input"

Set SDA's Section to "Communication"

Set SDA's Pin Group to "I2C"

Set SDA's Pin Orientation to "Left"

Set SDA's Pin Description to "I2C bidirectional data"

Set MOTION's Section to "Control"

Set MOTION's Pin Group to "Motion"

Set MOTION's Pin Orientation to "Right"

Set MOTION's Pin Description to "Active-low motion interrupt"

Set ID_SEL's Section to "Control"

Set ID_SEL's Pin Group to "Address Select"

Set ID_SEL's Pin Orientation to "Left"

Set ID_SEL's Pin Description to "I2C slave address select"

3 days

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PAT9125EL-TKIT Part Datasheet Audit

What I checked

Current part project properties and terminal elements from the schematic.
Current footprint/pad objects and attached footprint asset.
Part review checks for missing project/terminal metadata.
Datasheet data from the PixArt PAT9125EL Product Datasheet PDF at: https://www.epsglobal.com/Media-Library/EPSGlobal/Products/files/pixart/PAT9125EL-TKITPAT9125EL-TKMT.pdf?ext=.pdf

Datasheet URL update

The part already has a Datasheet URL in project context; I verified it points to the PixArt PAT9125EL-TKIT/TKMT datasheet PDF. I also set/confirmed the project-level Datasheet URL property to:

https://www.epsglobal.com/Media-Library/EPSGlobal/Products/files/pixart/PAT9125EL-TKITPAT9125EL-TKMT.pdf?ext=.pdf

Datasheet-derived part information

Field	Datasheet value
Manufacturer	PixArt Imaging Inc.
MPN reviewed	PAT9125EL-TKIT
Description	Optical Tracking Miniature Chip
Interface variant	I2C for PAT9125EL-TKIT; 3-wire SPI for PAT9125EL-TKMT
Package	LGA 8-pin
Package size	3.5 x 3.2 x 1.0 mm
Light source	850 nm VCSEL laser
Resolution	Programmable up to ~1,275 cpi on flat stainless steel surface
DOF / distance to surface	1 to 30 mm on STS surface
VDD operating ranges	2.1–3.6 V high-voltage segment, or 1.7–1.9 V low-voltage segment
VLD operating range	2.7–3.6 V for laser power
Operating temperature	-20°C to +60°C
SCL speed	Up to 1 MHz for I2C interface

Datasheet pin table vs current schematic terminals

The datasheet lists 8 normal LGA pins plus a back-side TEST pin that is NC / do-not-connect.

Table

Pin	Datasheet I2C name	Datasheet type	Datasheet function	Current terminal	Current pin type	Status
1	VLD	PWR	VCSEL laser anode, 2.7–3.3 V in pin table / 2.7–3.6 V in recommended conditions	VLD	Power In	OK
2	VDDA	PWR	1.8 V regulator output in high-voltage mode; connect 4.7 uF to GND. In low-voltage mode, connect to VDD directly	VDDA	Power In	Pin exists; pin type is debatable because datasheet describes VDDA as regulator output in high-voltage mode
3	VDD	PWR	Main IC power supply	VDD	Power In	OK
4	VSS	GND	Chip ground	VSS	Power Out	MISMATCH: should be Ground
5	SCL	IN	I2C clock input	SCL	Input	OK
6	SDA	I/O	I2C bidirectional data	SDA	Bi-Directional	OK
7	MOTION	OUT	Motion detection output, active low	MOTION	Output	OK
8	ID_SEL	IN	I2C slave ID select: High=0x73, Low=0x75, NC=0x79	ID_SEL	Input	OK
9	TEST	NC	Back-side PixArt test pin; do not connect to any PCB part	No terminal	Missing if Flux should model every datasheet-listed pin; may be intentionally omitted if the footprint has no connectable pad

Current schematic symbol audit

Current schematic terminals found:

VLD, pin 1, Power In
VDDA, pin 2, Power In
VDD, pin 3, Power In
VSS, pin 4, Power Out
SCL, pin 5, Input
SDA, pin 6, Bi-Directional
MOTION, pin 7, Output
ID_SEL, pin 8, Input

Issues:

VSS is typed as Power Out, but the datasheet defines pin 4 as GND / Chip ground; this should be Ground.
No terminal exists for datasheet pin 9 TEST, which the datasheet says is on the back of the chip and must not be connected. Whether this should be represented depends on whether the Flux part should include non-connectable back-side/test pads.
Terminals are missing parametric symbol metadata: Pin Group, Pin Orientation, and Section for all eight existing terminals.
Pin descriptions are not populated on the terminals.

Project metadata audit

Current indexed project properties found:

Table

Property	Current value	Datasheet check
Manufacturer Part Number	PAT9125EL-TKIT	OK
Datasheet URL	EPS Global hosted PixArt PDF	OK / set
Designator Prefix	U	OK for IC/sensor package
Manufacturer Name	Missing	Should be PixArt Imaging Inc.
Part Type	Missing	Should be Sensor / Optical Tracking Sensor
Package or Case Code	Missing	Should be LGA 8-pin, 3.5 x 3.2 x 1.0 mm
Description	Blank / not indexed	Should describe optical tracking miniature chip with I2C, VCSEL, LGA8

Review checks also flagged missing Manufacturer Name and Part Type, and informational warnings that each terminal lacks Pin Group, Pin Orientation, and Section.

Footprint audit

Available footprint asset:

LGA8_3P2X3P5_PIX-M.kicad_mod
Label: PAT9125EL-TKIT
Marked as a footprint asset

PCB layout pad objects exist for VLD, VDDA, VDD, VSS, SCL, SDA, MOTION, and ID_SEL. This aligns with the 8-pin LGA package and the footprint filename suggests 3.2 x 3.5 mm LGA8. I could not extract exact pad geometry from the imported footprint object through the current layout data; the datasheet mechanical page gives 3.50 ±0.1 mm x 3.20 ±0.1 mm body and 1.00 ±0.1 mm height, with bottom-view pad dimensions shown in the package outline.

Key mismatches / action items

Fix VSS terminal Pin Type: Power Out → Ground.
Add missing project metadata:
- Manufacturer Name: PixArt Imaging Inc.
- Part Type: Sensor or Optical Tracking Sensor
- Package or Case Code: LGA 8-pin / 3.5 x 3.2 x 1.0 mm
Add terminal metadata:
- Section: Power for VLD/VDDA/VDD; Ground for VSS; Communication for SCL/SDA; Control for ID_SEL; Signal/Interrupt for MOTION.
- Pin Group: Power, Ground, I2C, Control, Interrupt.
- Pin Orientation: Top for power, Bottom for VSS, Left for SCL/SDA/ID_SEL, Right for MOTION.
Add concise pin descriptions for all terminals.
Decide whether to model datasheet pin 9 TEST as a Not Connected terminal/no-connect pin, or leave it omitted because it is a back-side factory test pin that must not connect to the PCB.

What I checked

Datasheet URL update

Datasheet-derived part information

Datasheet pin table vs current schematic terminals

Current schematic symbol audit

Project metadata audit

Footprint audit

Key mismatches / action items

Reviews

Documents

PAT9125EL-TKIT Part Datasheet Audit

Assets

kicad_mod

PAT9125EL-TKIT

LGA8_3P2X3P5_PIX-M.kicad_modFootprint

PAT9125EL-TKIT-thumb.png

PAT9125EL-TKIT-thumbThumbnail

Project Name

PAT9125EL-TKIT

Description

The PAT9125EL-TKIT from PixArt Imaging Inc. is a low-power optical tracking miniature chip designed for precise motion detection using laser-based optical navigation technology. It integrates both the optical sensor and VCSEL laser light source into a single compact package, enabling accurate tracking even on smooth or glossy surfaces.

This device captures sequential surface images and processes them internally to determine movement direction, speed, and displacement (X/Y data), which can be accessed by a host controller via digital interfaces.

It is particularly suited for space-constrained, battery-powered, and enclosed systems, eliminating the need for mechanical components like code wheels or special surface markings.

Key Features Integrated optical sensor + VCSEL laser (850 nm) in a single package No external lens required, simplifying design Wide depth of field (DOF): 1–30 mm, even on reflective surfaces Programmable resolution up to ~1275 CPI Supports I²C (TKIT) interface (SPI variant available as TKMT) Motion detection interrupt output Built-in oscillator (no external clock needed) Low power consumption: Run: ~0.7 mA Sleep: down to 10 µA Power-down: ~5 µA Pre-calibrated laser (no calibration required) IEC/EN 60825-1 Class 1 eye-safe laser compliant Key Specifications Supply Voltage: VDD: 1.7–3.6 V VLD (laser): 2.7–3.6 V Max Tracking Speed: up to ~30 inches/sec Package: 8-pin LGA (3.5 × 3.2 × 1.0 mm) Interface: I²C (for TKIT variant)

Properties

Manufac… Number

PAT9125EL-TKIT

Manufac…er Name

PixArt

Part Type

Sensor

Datasheet URL

epsglobal.com/Media-Library/EPSGlobal/Products/files/pixart/PAT9125EL-TKITPAT9125EL-TKMT.pdf?ext=.pdf

Designator Prefix

Symbol Style

parametric-v1

Pricing & Availability

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adrian95 / PAT9125EL-TKIT

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