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Designer's Kits

ADSL Transformers for
Texas Instruments TNETD4000R/3000R

These products are not available in RoHS-compliant versions. Terminations contain lead.
  • For Texas Instruments TNETD4000R, TNETD3000R
  • Surface mount or leaded configuration
  • Low profile design, only 0.50" high
  • Custom versions also available


Part number
Click to get parts
Style Line side
±5% (mH)
max (µH)
DCR max (Ohms)1
Chip side Line side
AS8578-A TH 1.5 18 0.800 (1-4) 3.75 (10-7)
AS8579-A SMT 1.5 18 0.800 (1-4) 3.75 (10-7)
Part number
Click to get parts
strength (V)
Turns ratio
max (pF)
balance typ (dB)
THD at 20 kHz
typ (dB)
to meet
AS8578-A 1875 1.42:1 35.0 40 (20 kHz – 1.1 MHz) −85 UL 1950
AS8579-A 1875 1.42:1 35.0 40 (20 kHz – 1.1 MHz) −85 UL 1950
1 DCR measured at 25°C. For other operating temperatures, use this DCR at Temperature calculator.
2 Operating temperature range −40°C to +85°C
3 Electrical specifications at 25°C, referenced to line side.
Refer to Soldering Coilcraft Components before soldering.
PCB washing: Tested to MIL-STD-202 Method 215 plus an additional aqueous wash. More info

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Updated: April 16, 2018