MiCS-5914 Part Review

flux

I’ll review the part metadata, find and set the official datasheet if needed, then compare the symbol/footprint/pin details against the datasheet and report any mismatches.

flux

I found the official SGX Sensortech datasheet and confirmed the current library part has no symbol pins and no datasheet set. I’m updating the datasheet link now, then I’ll finish the cross-check report.
Created a project doc

Part Review - MICS-5914

View Document
Date: 2026-07-14 Reviewed available part information for the current published part project: MPN, manufacturer/package metadata, description...

flux

Completed the MICS-5914 review and set the official SGX Sensortech datasheet URL in the project properties. I created the detailed review in Part Review - MICS-5914.
Open items:
  • The description incorrectly mentions CO detection; MiCS-5914 is primarily an NH3/ammonia sensor.
  • Terminals are A–J including I, but the datasheet uses A, B, C, D, E, F, G, H, J, K.
  • Pin descriptions/types are missing for C=Rh1, D=Rs1, F=Rh2, G=Rs2.
Suggested next steps:
  1. Fix terminal labels and pin descriptions.
  2. Correct the part description.
  3. Verify footprint orientation against the datasheet bottom-view pin diagram.
Fix labels and review
Fix terminal labels
Add pin metadata
Correct description
Verify footprint orientation
Sign up to send

Files

Pins

Symbol

Layout

3D View

Part Review - MICS-5914
Date: 2026-07-14
Scope
Reviewed available part information for the current published part project: MPN, manufacturer/package metadata, description, properties, symbol terminals, footprint, pad mapping, and datasheet consistency.
Datasheet
  • Official source found: SGX Sensortech / Amphenol SGX Sensortech MiCS-5914 datasheet, 1108 rev 4.
  • Datasheet URL set in the current project properties: https://www.sgxsensortech.com/content/uploads/2014/07/1108_Datasheet-MiCS-5914.pdf
  • Note: the Flux library search index still reported the published component as has_datasheet: false immediately after the update, so the indexed library result may lag the project property state.
Current Part Metadata Observed

Table

FieldCurrent value / observationDatasheet / official referenceAssessment
MPNMICS-5914MiCS-5914OK
ManufacturerSet to SGX SensortechSGX Sensortech / Amphenol SGX SensortechOK, though distributor branding often uses Amphenol SGX Sensortech
Part TypeSet to SensorCompact MOS / MEMS ammonia gas sensorAcceptable, could be more specific as gas sensor
Designator PrefixUSensor IC/module-style SMD partAcceptable
Datasheet URLSet to official SGX PDF URLOfficial PDF foundOK in project properties
DescriptionAmmonia (NH3) Sensor Analog title, but body says carbon monoxide / CO detectionMiCS-5914 is primarily an ammonia / NH3 sensorMismatch: CO wording is wrong and should be corrected
Package / footprint assetSON_CS-5914_SGX.kicad_mod; 3D model MICS-5914.stp5 x 7 x 1.55 mm SMD packageMechanically plausible; exact land-pattern validation incomplete
Datasheet Key Specs

Table

ParameterDatasheet value
TechnologyMOS / MEMS gas sensor
Primary gasAmmonia / NH3
Product-page range100-10,000 ppb NH3
Datasheet detectable NH3 range1-500 ppm
Typical NH3 full-scale range1-300 ppm
Heater voltage2.2 V typ.
Heater current30 mA typ.
Heater power66 mW typ.; 60-73 mW range
Heater resistance72 ohm typ.; 64-80 ohm range
Max heater power88 mW
Max sensing-layer power8 mW
Recommended supply4.9-5.1 V
Load resistor limitRLOAD >= 820 ohm minimum
Recommended 5 V heater series resistor93.1 ohm E96 typ.
Operating temperature-30 to +85 °C
Operating humidity5-95 %RH
Storage temperature-40 to +120 °C
Package size5 x 7 x 1.55 mm
Datasheet Pinout
The datasheet uses lettered pads, not numeric pads. It also skips the letter I.

Table

Datasheet padFunction / connection
Ablank / not assigned in datasheet
Bblank / not assigned in datasheet
CRh1
DRs1
Eblank / not assigned in datasheet
FRh2
GRs2
Hblank / not assigned in datasheet
Jblank / not assigned in datasheet
Kblank / not assigned in datasheet
Suggested pin metadata:

Table

PadSuggested Flux pin descriptionSuggested pin type
CHeater terminal Rh1Passive
FHeater terminal Rh2Passive
DSensor resistance terminal Rs1Passive
GSensor resistance terminal Rs2Passive
A, B, E, H, J, KNot assigned / NC per datasheet tableNot Connected or passive reserved/mechanical, depending library convention
Current Symbol / Terminal Check
Current schematic terminals observed: A, B, C, D, E, F, G, H, I, J.

Table

Current terminalCurrent pin numberDatasheet expectationAssessment
A1AOK label, description missing
B2BOK label, description missing
C3C = Rh1Label OK; missing Rh1 description/type
D4D = Rs1Label OK; missing Rs1 description/type
E5EOK label, description missing
F6F = Rh2Label OK; missing Rh2 description/type
G7G = Rs2Label OK; missing Rs2 description/type
H8HOK label, description missing
I9No datasheet pad IMismatch: should likely be J
J10J exists, K also expectedMismatch: terminal K missing; J likely shifted
Primary symbol issue: the terminal set should be A, B, C, D, E, F, G, H, J, K, with no I. The current symbol uses I and omits K.
All terminals currently have Pin Type: Unspecified; the important functional pins C/D/F/G should be described, and non-assigned pads should be explicitly marked as NC/reserved/mechanical according to the project library convention.
Footprint / Package Check
Observed footprint characteristics:
  • Footprint asset: SON_CS-5914_SGX.kicad_mod
  • SMD pads: 10 rectangular pads
  • Imported pad size: 0.5588 x 1.2954 mm
  • Fabrication outline: about 5.0038 x 7.0104 mm
  • Datasheet package size: 5 x 7 x 1.55 mm
Assessment:
  • The body outline matches the datasheet package size closely.
  • The pad count matches the 10 datasheet pads.
  • The imported footprint originally used numeric pads 1-10, while the current Flux pads/terminals are lettered A-J including I. The conversion appears to map numeric pad 1 -> A through numeric pad 10 -> J, which conflicts with the datasheet's skipped-I alphabetic sequence.
  • The datasheet text extraction did not expose a complete recommended land-pattern table, so pad dimensions and positions could not be fully verified against an authoritative numeric footprint drawing. The package outline is plausible, but the terminal naming/mapping must be corrected before relying on the part.
  • The datasheet configuration is shown as a bottom view; footprint orientation should be verified visually against the manufacturer drawing to ensure C/D/F/G are not mirrored or shifted.
Mismatches / Risks
  1. Description mismatch: current text says CO / carbon monoxide detection, but MiCS-5914 is an ammonia / NH3 sensor.
  2. Terminal naming mismatch: current symbol/footprint exposes I; datasheet skips I and uses K as the 10th pad.
  3. Missing pin descriptions: C/D/F/G need Rh1/Rs1/Rh2/Rs2 descriptions; NC/blank pads should be identified.
  4. Pin types are all unspecified; this weakens ERC/part review.
  5. Footprint body is plausible, but exact land-pattern dimensions were not fully verified from the datasheet OCR.
  6. Orientation risk remains because the datasheet pin configuration is a bottom view; physical mapping of C/D/F/G should be checked against the original drawing before publication/use.
  1. Correct the description to identify the part as an ammonia / NH3 MOS gas sensor, not a CO sensor.
  2. Rename/recreate terminals so the final terminal list is A, B, C, D, E, F, G, H, J, K.
  3. Assign pin descriptions: C=Rh1, D=Rs1, F=Rh2, G=Rs2.
  4. Mark A/B/E/H/J/K as NC or reserved/mechanical per the chosen Flux convention.
  5. Verify and, if needed, correct footprint pad labels so pad 9 is J and pad 10 is K rather than I/J.
  6. Visually verify top-vs-bottom orientation for C/D/F/G against the datasheet package drawing.

  • Scope

  • Datasheet

  • Current Part Metadata Observed

  • Datasheet Key Specs

  • Datasheet Pinout

  • Current Symbol / Terminal Check

  • Footprint / Package Check

  • Mismatches / Risks

  • Recommended Fixes