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HDSL2 Transformers
H28223-B, H28224-B

These products are not available in RoHS-compliant versions. Terminations contain lead. Contact Coilcraft for current status or possible alternatives.
  • For Level One SK70740/-41/-42 and most other HDSL2 transceiver chip sets
  • Low leakage inductance and DCR
  • 1 CT : 2.3 CTS turns ratio for lower supply voltage applications
  • Up to 3000 V line isolation
  • Low profile design, only 0.5" high
  • Custom versions also available

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SPECIFICATIONS


Part number
Click to get parts
Data rate
(kb/s)
Turns ratio
chip:line
Primary
inductance
±15% (mH)
Leakage
inductance
max (µH)
Capacitance
max (pF)
DCR max (Ohms)1
Chip side Line side
H28223-B 1500 1CT : 2.3CTS   2.0 30 65 1.85 (10-7) 2.1 (1-4), 2.1 (2-5)
H28224-B 1500 1CT : 2.3CTS 2.0 30 65 1.85 (10-7) 2.1 (1-4), 2.1 (2-5)
Part number
Click to get parts
DC bias
capacity
(mA)
Dielectric
strength
(V)
Return loss min (dB) Longitudinal
balance typ (dB)
THD typ (dB)
at 40 kHz at 320 kHz
H28223-B 100 3000 13 13 65 @ 40 kHz −85 @ 20 kHz
H28224-B 100 2300 13 13 65 @ 40 kHz −85 @ 20 kHz
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: October 30, 2017