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HDSL2 TRANSFORMERS |
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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. |
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Part Number |
Style |
Data
rate
(kb/s) |
Turn
ratio
chip line |
Primary
inductance
±15% (mH) |
Leakage
inductance
max(µH) |
Capacitance
max(pF) |
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H28161-A |
Leaded |
1500 |
1CT:2.3 CTS |
2.0 |
25 |
90 |
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H28159-A |
Leaded |
1500 |
1CT:2.3 CTS |
2.0 |
30 |
55 |
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H28160-A |
SMT |
1500 |
1CT:2.3 CTS |
2.0 |
30 |
55 |
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H27649-B |
Leaded |
1500 |
1CT:2 CTS |
2.0 |
25 |
90 |
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H27650-A |
Leaded |
1500 |
1CT:2 CTS |
2.0 |
25 |
55 |
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H27695-A |
SMT |
1500 |
1CT:2 CTS |
2.0 |
25 |
55 |
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H28223-B |
Leaded |
1500 |
1CT:2.3 CTS |
2.0 |
30 |
65 |
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H28224-B |
SMT |
1500 |
1CT:2.3 CTS |
2.0 |
30 |
65 |
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Part Number |
DCR max (Ohms) |
DC bias capacity
(mA) |
Dielectric strength
(V) |
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Chip side |
Line side |
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H28161-A |
1.5(9-7) |
1.5(1-4),1.5(2-5) |
100 |
2300 |
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H28159-A |
2.0(8-6) |
2.0(1-2),2.0(3-4) |
100 |
3000 |
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H28160-A |
2.0(8-6) |
2.0(1-2),2.0(3-4) |
100 |
3000 |
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H27649-B |
1.5(9-7) |
1.5(1-4),1.5(2-5) |
100 |
2300 |
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H27650-A |
2.0(8-6) |
2.0(1-2),2.0(3-4) |
100 |
3000 |
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H27695-A |
2.0(8-6) |
2.0(1-2),2.0(3-4) |
100 |
3000 |
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H28223-B |
1.85(10-7) |
2.1(1-4),2.1(2-5) |
100 |
3000 |
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H28224-B |
1.85(10-7) |
2.1(1-4),2.1(2-5) |
100 |
2300 |
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Part Number |
Return loss |
Longitudinal balance
typ(dB) |
THD
typ(dB) |
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min(dB) |
min(dB) |
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H28161-A |
13@40KHz |
13@320KHz |
65@40KHz |
-85@20KHz |
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H28159-A |
13@40KHz |
12@320KHz |
65@40KHz |
-85@20KHz |
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H28160-A |
13@40KHz |
12@320KHz |
65@40KHz |
-85@20KHz |
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H27649-B |
14@40KHz |
15@320KHz |
65@40KHz |
-85@20KHz |
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H27650-A |
14@40KHz |
13@320KHz |
65@40KHz |
-85@20KHz |
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H27695-A |
14@40KHz |
13@320KHz |
65@40KHz |
-85@20KHz |
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H28223-B |
13@40KHz |
13@320KHz |
65@40KHz |
-85@20KHz |
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H28224-B |
13@40KHz |
13@320KHz |
65@40KHz |
-85@20KHz |
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1.All electrical specifications referanced to line side.
2.Operating temperture range -40°C to +85°C.
3.Electrical specifications at 25°C.
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