7649

Document 202-1
HDSL2 Transformers
This product is not RoHS-compliant. Contact Coilcraft
for current status or possible alternatives.
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 turns ratio, 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, longitudinal balance and THD are optimized for the best overall performance at the HDSL2
transmission speed.
For free evaluation samples or to discuss custom designs, please contact Coilcraft.
Part
number
Style
H28161-A Leaded
H28159-A Leaded
H28160-A
SMT
H27649-B Leaded
H27650-A Leaded
H27695-A
SMT
H28223-B Leaded
H28224-B
SMT
Part
number
H28161-A
H28159-A
H28160-A
H27649-B
H27650-A
H27695-A
H28223-B
H28224-B
Data Turns Primary Leakage
DCR max (Ohms)
rate
ratio
inductance inductanceCapacitance
(kb/s)
chip:line ±15% (mH)
max (µH)
max (pF)
Chip side Line side
1500
1 CT:2.3 CTS
2.0
25
90
1.5 (9-7)
1.5 (1-4), 1.5 (2-5)
1500
1 CT:2.3 CTS
2.0
30
55
2.0 (8-6)
2.0 (1-2), 2.0 (3-4)
1500
1 CT:2.3 CTS
2.0
30
55
2.0 (8-6)
2.0 (1-2), 2.0 (3-4)
1500
1 CT:2 CTS
2.0
25
90
1.5 (9-7)
1.5 (1-4), 1.5 (2-5)
1500
1 CT:2 CTS
2.0
25
55
2.0 (8-6)
2.0 (1-2), 2.0 (3-4)
1500
1 CT:2 CTS
2.0
25
55
2.0 (8-6)
2.0 (1-2), 2.0 (3-4)
1500
1 CT:2.3 CTS
2.0
30
65
1.85 (10-7) 2.1 (1-4), 2.1 (2-5)
1500
1 CT:2.3 CTS
2.0
30
65
1.85 (10-7) 2.1 (1-4), 2.1 (2-5)
DC bias
capacity
(mA)
100
100
100
100
100
100
100
100
Dielectric
Return loss
strength
(V)
min (dB) min (dB)
2300
13 @ 40 kHz
13 @ 320 kHz
3000
13 @ 40 kHz
12 @ 320 kHz
3000
13 @ 40 kHz
12 @ 320 kHz
2300
14 @ 40 kHz
15 @ 320 kHz
3000
14 @ 40 kHz
13 @ 320 kHz
3000
14 @ 40 kHz
13 @ 320 kHz
3000
13 @ 40 kHz
13 @ 320 kHz
2300
13 @ 40 kHz
13 @ 320 kHz
Longitudinal
balanceTHD
typ (dB)
typ (dB)
65 @ 40 kHz
-85 @ 20 kHz
65 @ 40 kHz
-85 @ 20 kHz
65 @ 40 kHz
-85 @ 20 kHz
65 @ 40 kHz
-85 @ 20 kHz
65 @ 40 kHz
-85 @ 20 kHz
65 @ 40 kHz
-85 @ 20 kHz
65 @ 40 kHz
-85 @ 20 kHz
65 @ 40 kHz
-85 @ 20 kHz
1.All electrical specifications referenced to line side.
2.Operating temperature range -40°C to +85°C.
3.Electrical specifications at 25°C.
Document 202-1 Revised 11/18/11
Document 202-2
HDSL2 Transformers
H27650-A, H28159-A
H27695-A, H28160-A
Dot above pin 1
4
C
Dot above pin 1
5
C
A
A
B
D
E
1
8
E
E
5
4
F
F
F
8
1
G
B
H
G
Recommended
Board Layout
Recommended
Land Pattern
Packaged 100 per tray
Packaged 60 per tray
A max B max C max D min
E
F typ G dia H dia
E
F typ
G typ
0.650 0.675 0.35 0.1250.5410.1480.0200.030inches
0.675
A max B max C max
0.925
0.35
0.591
0.148
0.079 × 0.110
16,5117,15 8,9 3,1913,743,76 0,510,76mm
17,14
23,50
8,9
15,01
3,76
2,01 × 2,79
H28223-B
H28224-B
inches
mm
Dot above pin1
B
10
1
C
C
A
D
6
5
B
E
E
6
5
G
10
1
Recommended
Board Layout
Packaged 50 per tray
A max B max C max D min
G
10
Packaged 100 per tray
E
F typ
G typ
0.530
0.699
0.500
0.590
0.098
0.050 × 0.061
13,97 13,97
13,46
17,75
12,70
14,99
2,50
1,27 × 1,55
3,0
10,16
F typ G sq H dia
2,54
0,51
A max B max C max
1,0
mm
H27649-B, H28161-A
inches
mm
H27650-A, H28159-A,
H27695-A, H28160-A H28223-B, H28224-B
Dot on pin 1
1
9
1
Recommended
Land Pattern
0.550 0.550 0.500 0.1000.4000.1000.0200.038inches
12,70
E
F
A
H
1
E
6
5
Line side
1
F
A
Chip side
8
Line side
1
Chip side
10
7
5
G
E
B
2
3
7
4
2
9
4
6
5
7
F
H27649-B, H28161-A
C
H
D
Packaged 49 per tray
A max B max C max
Line side
1
Recommended
Board Layout
D min
E
F typ
G typ
H typ
0.930
1.05
0.46
0.12
0.800
0.150
0.017 × 0.038
0.045 × 0.025
23,62
26,7
11,7
3,0
20,32
3,81
0,43 × 0,97
1,14 × 0,64
inches
mm
Chip side
9
4
2
8
5
7
Document 202-2 Revised 11/18/11
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