Part Information Review and Datasheet Integration

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Here is a complete, sequential execution of your request for the part project TY-250P.
  1. Review of available part information (from the project)
  • MPN: TY-250P
  • Manufacturer: Triad Magnetics (noted in project description)
  • Designator Prefix: T
  • Package: Not set in project properties
  • Pin count (as currently represented in the schematic): 7 “connection points” labeled 2, 3, 4, 5, 6, 7, 8; no nets defined
  • Datasheet property: Not present
  1. Datasheet URL
  • Official datasheet: Datasheet
  • I can add/update the project property ‘Datasheet’ to the above URL now.
  1. Datasheet extraction and summary (Triad Magnetics TY-250P)
Electrical characteristics (25°C, per datasheet)
  • Primary impedance: 1000 Ω CT
  • Secondary impedance: 1000 Ω CT / 250 Ω
  • Output: 20 mW
  • Primary DC unbalance: 4 mA
  • Frequency response: +1 dB from 20 Hz to 20,000 Hz
  • Insertion loss @ 1 kHz: < 2.8 dB
  • DCR: Primary (2–4) 172 Ω nominal; Secondary (5–8, with 6–7 tied) 172 Ω nominal
  • Turns ratio options:
    • 1:1 when 6 & 7 are tied
    • 2:1 when 5 is tied to 6 and 7 is tied to 8
  • Additional limits stated with optional impedances: input voltage ≤ 4.2 Vrms and current ≤ 7 mA
  • Dielectric strength (primary-to-secondary): 1500 V
Limits and operating conditions (per datasheet)
  • Operating temperature range: -40°C to +105°C
  • Dielectric strength: 1500 V primary-to-secondary (also listed in electrical characteristics)
Pin information (per datasheet)
  • Physical pins indicated as 1 through 8 (bottom view shown)
  • Primary winding referenced between pins 2 and 4 (CT implied in “1000 Ω CT” spec)
  • Secondary winding referenced between pins 5 and 8; configurations:
    • 1:1 ratio when pins 6 and 7 are tied together
    • 2:1 ratio when 5 is tied to 6 and 7 is tied to 8
  • DCR callouts:
    • Primary (2–4) 172 Ω nominal
    • Secondary (5–8, with 6–7 tied) 172 Ω nominal
Mechanical/package dimensions (from drawing, units not explicitly labeled in the extract)
  • Lead size: 0.025 SQ (8 PLCS)
  • Overall maxima shown: 0.900 MAX, 0.800 MAX, 0.770 MAX, 0.700 MAX
  • Body/lead spacings called out:
    • 0.520 ± 0.020
    • 0.200 ± 0.020 (5 PLCS)
    • 0.150 ± 0.020
    • 0.040
  • Bottom view is provided with pin placement diagram
  • Note: The drawing provides all necessary geometry to derive an 8-pad footprint; please refer to the original drawing in the datasheet for exact dimensional context and units.
Special features and applications (per datasheet)
  • Audio-range operation: 20 Hz to 20 kHz
  • Applications: line matching, telephone coupling, pulse trigger, driver, interstage, input/output isolation
  • Multiple connection options to realize 1:1 or 2:1 behavior
  • RoHS 3 compliant (2015/863/EU)
  1. Cross-check: symbol and footprint vs datasheet
Symbol (schematic)
  • Observed: 7 connection points labeled 2, 3, 4, 5, 6, 7, 8; no pin “1” is represented.
  • Datasheet: Shows eight physical pins (1–8).
  • Flag: Mismatch — missing pin 1 in the symbol. This can cause incorrect pin mapping, documentation errors, and assembly/orientation ambiguity.
Footprint (PCB)
  • Observed: A default footprint exists with 7 pads; pad numbering not visible/defined; no placement geometry verified.
  • Datasheet: Requires 8 pins/leads with specific spacing (0.025 SQ leads, “0.200 ± 0.020” spacings in 5 places, and additional dimensional constraints).
  • Flags:
    • Pin count mismatch — 7 pads vs required 8. This will cause board failure (one lead unconnected) and assembly issues.
    • Pad numbering undefined — must match 1–8 per bottom-view orientation in datasheet to ensure correct connectivity.
    • Dimensional conformity unverified — pad pitch, hole size and body clearances must follow the drawing (e.g., 0.025 SQ leads suggest through-hole pads sized accordingly; the drawing includes a “0.040” dimension that likely relates to hole diameter, but confirm directly from the drawing context).
Recommended next corrections (for your awareness)
  • Update the schematic symbol to include all 8 pins with correct numbering (1–8) and groupings reflecting primary (2–4, CT implied) and secondary (5–8) connections.
  • Define the 1:1 and 2:1 tie options (6–7 tied for 1:1; 5–6 and 7–8 tied for 2:1) in the symbol notes or pin function descriptions.
  • Replace the footprint with an 8-pad through-hole pattern matching the datasheet’s bottom-view orientation, pad/hole sizes, and spacings.
  • Assign pad numbers 1–8 exactly as shown in the datasheet to prevent assembly and test errors.
If you want, I can proceed to:
  • Attach the datasheet URL to the project properties.
  • Fix the symbol (add the missing pin 1 and proper numbering).
  • Replace the footprint with an 8-pad pattern per the datasheet drawing.
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TY-250P

TY-250P thumbnail
1kCT Impedance Primary Ohms 1kCT Impedance Secondary Ohms 1:1, 2:1 Audio Transformer 20Hz ~ 20kHz Through Hole #Transformer #TY

Properties

TY-250P

Triad Magnetics

Transformer

catalog.triadmagnetics.com/Asset/TY-250P.pdf

T

creativecommons.org/licenses/by/4.0/

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