Part Data Review and Mismatch Check

Thought for 1 min 21 sec

flux

I reviewed the available part data and cross-checked it against the datasheet.

Overall result

Datasheet URL is already set, so I did not update the Datasheet property.
The core identity fields are mostly present and consistent:
- Manufacturer: Allegro Microsystems
- MPN: A3144EUA
- Description: Sensitive Hall-effect switch for high-temperature operation
I found two important metadata/content issues:
1. Part Type is missing in the project properties.
2. The symbol terminal numbering appears reversed vs. the datasheet.

Available part information

Table

Field	In project	Datasheet check	Status
Manufacturer Name	Allegro Microsystems	Allegro MicroSystems	OK
Manufacturer Part Number	A3144EUA	A3144EUA	OK
Description	"SENSITIVE HALL-EFFECT SWITCHES FOR HIGH-TEMPERATURE OPERATION"	Same family description	OK
Datasheet URL	Present	Reachable	OK
Designator Prefix	IC	Reasonable	OK
Package metadata	Not set	UA = 3-lead ultra-mini-SIP	Missing
Pin count	Implied by 3 terminals	3 leads	OK
Part Type	Not set	Should be a Hall-effect switch / sensor category	Missing

Key specs from the datasheet

Table

Spec	Value
Device type	Hall-effect switch
Output type	Open-collector
Operating supply	4.5 V to 24 V
Absolute max supply	28 V
Output sink current	Up to 25 mA
Temperature code	E = -40 C to +85 C
Package code	UA
Package style	3-lead ultra-mini-SIP

Datasheet pinout

Table

Pin	Name
1	OUTPUT
2	GROUND
3	VCC

Datasheet note: pinning is shown viewed from the branded side.

Symbol / terminal cross-check

Table

Project terminal	Current pin number	Datasheet expectation	Result
OUTPUT	3	1	Mismatch
GROUND	2	2	OK
SUPPLY	1	3 for VCC	Mismatch

Footprint cross-check

What I could verify from the part layout:

There is a footprint with 3 pads
Pads are named for OUTPUT, SUPPLY, and GROUND

What I could not fully verify from the exposed layout data:

Exact pad numbering
Exact lead pitch / hole size / mechanical dimensions
Whether the footprint geometry matches the UA package drawing

So the footprint is structurally plausible as a 3-pin SIP footprint, but mechanical compliance to the UA drawing is not proven from the current data alone.

Mismatches / issues to fix

Terminal numbering mismatch
- OUTPUT should be Pin 1, not Pin 3
- SUPPLY corresponds to VCC / Pin 3, not Pin 1
Naming inconsistency
- Datasheet uses VCC
- Project uses SUPPLY
- This is not necessarily wrong, but using VCC would match the datasheet better
Missing project metadata
- Part Type is missing
- Package metadata is missing

Recommendation

The biggest correctness issue is that the symbol currently appears to have pin 1 and pin 3 swapped relative to the datasheet. That can cause downstream pin mapping and footprint confusion in a published part.

If you want, I can next:

fix the terminal pin numbers,
rename SUPPLY to match VCC,
and add the missing package / part-type metadata.

Fix pin mapping

Add missing metadata

Check footprint details

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