This family of transformers provides optimum performance with the Level One SK70740/-41/-42 and other HDSL2 transceiver chip sets. The series now includes parts with a 1 CT to 2.3 CTS turnsretio,allowing them to work with line drivers for lower power supply voltages.
They're engineered for minimum DC resistance and very low leakage inductance.Primary inductance with and without DC bias is stable from -40°C to +85°C.The return loss,longltudinal balence and THD are optimized for the best overall performance at the HDSL2 transmission speed.
The H282XX transformers have an exceptionally small footprint while the H276XX and H281XX are among the lowest profile parts available.All three families are designed to meet UL 1459 and UL 1950 requirements.
For free evaluation samples or to discuss custom designs.
Part Number
Style
Data
rate
(kb/s)
Turn
ratio
chip line
Primary
inductance
±15% (mH)
Leakage
inductance
max(µH)
Capacitance
max(pF)
H28161-A
Leaded
1500
1CT:2.3 CTS
2.0
25
90
H28159-A
Leaded
1500
1CT:2.3 CTS
2.0
30
55
H28160-A
SMT
1500
1CT:2.3 CTS
2.0
30
55
H27649-B
Leaded
1500
1CT:2 CTS
2.0
25
90
H27650-A
Leaded
1500
1CT:2 CTS
2.0
25
55
H27695-A
SMT
1500
1CT:2 CTS
2.0
25
55
H28223-B
Leaded
1500
1CT:2.3 CTS
2.0
30
65
H28224-B
SMT
1500
1CT:2.3 CTS
2.0
30
65
Part Number
DCR max (Ohms)
DC bias capacity
(mA)
Dielectric strength
(V)
Chip side
Line side
H28161-A
1.5(9-7)
1.5(1-4),1.5(2-5)
100
2300
H28159-A
2.0(8-6)
2.0(1-2),2.0(3-4)
100
3000
H28160-A
2.0(8-6)
2.0(1-2),2.0(3-4)
100
3000
H27649-B
1.5(9-7)
1.5(1-4),1.5(2-5)
100
2300
H27650-A
2.0(8-6)
2.0(1-2),2.0(3-4)
100
3000
H27695-A
2.0(8-6)
2.0(1-2),2.0(3-4)
100
3000
H28223-B
1.85(10-7)
2.1(1-4),2.1(2-5)
100
3000
H28224-B
1.85(10-7)
2.1(1-4),2.1(2-5)
100
2300
Part Number
Return loss
Longitudinal balance
typ(dB)
THD
typ(dB)
min(dB)
min(dB)
H28161-A
13@40KHz
13@320KHz
65@40KHz
-85@20KHz
H28159-A
13@40KHz
12@320KHz
65@40KHz
-85@20KHz
H28160-A
13@40KHz
12@320KHz
65@40KHz
-85@20KHz
H27649-B
14@40KHz
15@320KHz
65@40KHz
-85@20KHz
H27650-A
14@40KHz
13@320KHz
65@40KHz
-85@20KHz
H27695-A
14@40KHz
13@320KHz
65@40KHz
-85@20KHz
H28223-B
13@40KHz
13@320KHz
65@40KHz
-85@20KHz
H28224-B
13@40KHz
13@320KHz
65@40KHz
-85@20KHz
1.All electrical specifications referanced to line
side.
2.Operating temperture range -40°C to +85°C.
3.Electrical specifications at 25°C.
