6788

Document 201-1
HDSL Transformers
This product is not RoHS-compliant. Contact Coilcraft
for current status or possible alternatives.
These HDSL transformers have been designed to work
with a variety of specific transceiver chips to provide 2B1Q
coded data transmission.
They’re engineered for low leakage inductance and return
loss as well as high line isolation. Longitudinal balance and
THD are optimized for the best overall performance at a
given transmission speed.
Coilcraft can also custom engineer a transformer to meet
your specific requirements. For free evaluation samples,
contact Coilcraft or visit www.coilcraft.com.
Specifications
Part
number
Chip set
HD6788
Brooktree BT8952
HD6789
Brooktree BT8952
HD6790
Brooktree BT8921
HD6791
Brooktree BT8921
HD6792
Level One SK70704
HD6793
Level One SK70704
Part
number
HD6788
HD6789
HD6790
HD6791
HD6792
HD6793
DC bias
capacity
(mA)
160
160
80
80
80
80
Data Turns
Primary Leakage
rate
ratio
inductance inductance
(kb/s)
chip:line
± 6% (mH)
max (µH)
784
2CT:1:1
3.0
20
1168
2CT:1:1
2.0
20
784
1CT:1:1
3.0
20
1168
1CT:1:1
2.0
20
784
1CT:1.8 CT
2.75
45
1168
1CT:1.8 CTS
2.06
40
Dielectric
strength
min (V)
1500
1500
1500
1500
1500
1500
Return loss min
(dB)
18@ 40 - 200 kHz
16.5@ 40 - 320 kHz
18@ 40 - 200 kHz
16.5@ 40 - 320 kHz
18@ 40 - 200 kHz
16.5@ 40 - 320 kHz
DCR max (Ohms)
Chip side Line side
4.4 (2-4) 2.2 (6-7, 8-9)
4.4 (2-4) 2.2 (6-7, 8-9)
2.2 (2-4) 2.2 (6-7, 8-9)
2.2 (2-4) 2.2 (6-7, 8-9)
3.2 (2-4) 3.0 (6-8, 8-10)
2.0 (2-4) 2.0 (6-7, 9-10)
Longitudinal balance typ
(dB)
69 @ 30 kHz 63 @ 196 kHz
77 @ 30 kHz 63 @ 292 kHz
68 @ 30 kHz 56 @ 196 kHz
75 @ 30 kHz 62 @ 292 kHz
60 @ 30 kHz 48 @ 196 kHz
60 @ 30 kHz 48 @ 292 kHz
THD typ
(dB)
-74 @ 100 kHz
-74 @ 100 kHz
-74 @ 100 kHz
-74 @ 100 kHz
-75 @ 5 kHz
-74 @ 5 kHz
1. All electrical specifications referenced to line side.
2. Operating temperature range -40°C to +85°C.
3. Electrical specifications at 25°C.
US +1-847-639-6400 [email protected]
UK +44-1236-730595 [email protected]
Taiwan +886-2-2264 3646 [email protected]
China +86-21-6218 8074 [email protected]
Singapore + 65-6484 8412 [email protected]
Document 201-1 Revised 02/11/08
© Coilcraft Inc. 2013
This product may not be used in medical or high
risk applications without prior Coilcraft approval.
Specification subject to change without notice.
Please check web site for latest information.
Document 201-2
HDSL Transformers
HD6788, HD6789, HD6790, HD6791
HD6792
HD6793
E
Recommended
Board Layout
Packaged 49 per tray
A max
0.950
24,13
B max C max D min
1.05
0.46
0.12
26,7
11,7
3,0
F
H
E
0.800
20,32
F typ
0.150
3,81
G typ
0.017 × 0.038
0,43 × 0,97
H typ
0.025 × 0.045 inches
0,64 x 1,14 cm
US +1-847-639-6400 [email protected]
UK +44-1236-730595 [email protected]
Taiwan +886-2-2264 3646 [email protected]
China +86-21-6218 8074 [email protected]
Singapore + 65-6484 8412 [email protected]
Document 201-2 Revised 02/11/08
© Coilcraft Inc. 2013
This product may not be used in medical or high
risk applications without prior Coilcraft approval.
Specification subject to change without notice.
Please check web site for latest information.
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