TPS3436 Part Audit
Thought
Audit result — scoped task completed
Change made
- Added the previously absent Datasheet URL property:
- Verification:
- Property now appears in project metadata under the exact name Datasheet URL.
- Commit #d1f6d962 reports one property path changed and no other edited paths.
- Exact MPN: TPS3436BFACADDFRQ1
- Manufacturer: Texas Instruments
- Device: Automotive nano-IQ precision window watchdog timer
- Qualification: AEC-Q100 Grade 1
- Specified VDD range: 1.04–6.0 V
- Typical supply current: 250 nA
- Ambient operating range: –40°C to +125°C
- Package: DDF, 8-pin SOT-23-THIN/SOT-23-THN
- TI package drawing: DDF0008A
- Nominal body: 2.90 × 1.60 mm; 1.1 mm maximum height
- Lead pitch: 0.65 mm
- Exact MPN status from TI: Active; 3000-piece tape-and-reel; MSL 1
Correct:
- MPN:
TPS3436BFACADDFRQ1 - Manufacturer:
Texas Instruments - Designator prefix:
U - Part type:
Integrated Circuit - Datasheet URL now points directly to the official TI PDF.
- Description generally identifies the device, operating range, low current, automotive qualification, and DDF package correctly.
Issues/uncertainties:
- No explicit Package or Case Code property is present; package identity exists only through the description and footprint assets.
- No explicit pin-count property is present, although exactly eight terminals exist.
- Description uses “TSOT-23,” while TI’s formal naming is SOT-23-THIN/SOT-23-THN, DDF.
- The description combines broad family capabilities; not every stated timing/output option was independently verified as applicable to this exact ordering code.
The exact MPN’s first option code is B, meaning Pin Configuration B. TI specifies:
Table
| Pin | Correct Option-B function | Current symbol |
|---|---|---|
| 1 | SET0 | SET0 |
| 2 | CWD | MR_N — mismatch |
| 3 | CRST | WDI — mismatch |
| 4 | GND | GND |
| 5 | SET1 | SET1 |
| 6 | WDI | WD-EN — mismatch |
| 7 | WDO, active-low/open-drain variant | WDO_N |
| 8 | VDD | VDD |
Therefore the symbol currently represents Pin Configuration C, not the Option-B pinout required by
TPS3436BFACADDFRQ1.Additional terminal metadata defects:
- All eight terminals have Pin Type = Unspecified.
- Pin descriptions are absent.
- Pin groups are absent.
- Explicit orientation properties are absent, despite graphical left/right placement.
- Terminal-order fields are absent.
- Section and suffix fields are absent.
MR_NandWDO_Nare reasonable text representations of active-low names, but MR does not exist on Option B.- Correct electrical classifications should distinguish VDD power input, GND ground, logic/timing inputs, and WDO open-drain output.
Correct:
- Eight numbered SMD pads are present.
- Pad numbering follows the standard DDF counterclockwise arrangement.
- Footprint identifies DDF0008A.
- Pad pitch is 0.65 mm.
- Body fabrication outline is approximately 2.9 × 1.6 mm.
- Pin-1 marker is present.
- The attached 3D model is
DDF0008A.stp.
Mismatches/uncertainties:
- Pad terminal labels inherit the incorrect Option-C symbol mapping:
- Pad 2 is labeled MR_N rather than CWD.
- Pad 3 is labeled WDI rather than CRST.
- Pad 6 is labeled WD-EN rather than WDI.
- Footprint asset filename references
TPS3436BFACADDFRQ1, but its terminal mapping does not match that exact MPN. - Implemented pads are approximately 1.7565 × 0.5000 mm. TI’s example DDF land pattern shows approximately 1.05 × 0.45 mm lands. The footprint is marked
DDF0008A-IPC_A, so the larger pads may reflect an IPC density-level choice, but they do not reproduce TI’s example land pattern and should be mechanically reviewed. - No footprint package/case property independently binds the geometry to DDF; identity relies on asset names and embedded footprint text.
- Completed: Datasheet research, metadata audit, all eight terminals, symbol semantics, footprint geometry/pad numbering/package identity, and Datasheet URL update.
- Intentionally unmodified: All symbol, terminal, metadata, and footprint discrepancies, per instruction not to alter anything except the absent Datasheet URL.
- Primary blocking defect: The symbol and pad labels use Option-C connectivity while the exact MPN requires Option-B connectivity.
Thought for 49 sec
Audit complete. I added the official TI datasheet URL: https://www.ti.com/lit/ds/symlink/tps3436-q1.pdf and verified that it was the only property changed.
- Part: TPS3436BFACADDFRQ1, Texas Instruments automotive window watchdog
- Key specs: 1.04–6 V VDD, 250 nA typical IQ, −40°C to +125°C, AEC-Q100 Grade 1
- Package: 8-pin DDF SOT-23-THIN, 0.65 mm pitch, nominal 2.9 × 1.6 mm body
- Critical mismatch: The exact B-option MPN requires pins 2/3/6 = CWD/CRST/WDI, but the symbol and footprint currently use MR_N/WDI/WD-EN, corresponding to option C.
- Other issues: All pin types are unspecified; pin descriptions/groups are missing; no explicit package/case property is set; description says “TSOT-23” rather than TI’s formal DDF designation.
- Footprint: Eight-pad numbering and pitch are correct, but its approximately 1.7565 × 0.50 mm pads are substantially longer than TI’s example 1.05 × 0.45 mm land pattern and merit review.
No mismatches besides the missing datasheet link were modified.
Fix pinout and metadata
Correct B pinout
Add pin metadata
Set package property
Review footprint pads
