US
UK
Taiwan
China
Singapore
+1-847-639-6400 sales@coilcraft.com
+44-1236-730595 sales@coilcraft-europe.com
+886-2-2264 3646 sales@coilcraft.com.tw
+86-21-6218 8074 sales@coilcraft.com.cn
+ 65-6484 8412 sales@coilcraft.com.sg
© 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.
HDSL Transformers
Document 201-1
Document 201-1 Revised 02/11/08
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.
Data Turns Primary Leakage
Part rate ratio inductance inductance
DCR max (Ohms)
number Chip set (kb/s) chip:line ± 6% (mH) max (µH) Chip side Line side
HD6788 Brooktree BT8952 784 2CT:1:1 3.0 20 4.4 (2-4) 2.2 (6-7, 8-9)
HD6789 Brooktree BT8952 1168 2CT:1:1 2.0 20 4.4 (2-4) 2.2 (6-7, 8-9)
HD6790 Brooktree BT8921 784 1CT:1:1 3.0 20 2.2 (2-4) 2.2 (6-7, 8-9)
HD6791 Brooktree BT8921 1168 1CT:1:1 2.0 20 2.2 (2-4) 2.2 (6-7, 8-9)
HD6792 Level One SK70704 784 1CT:1.8 CT 2.75 45 3.2 (2-4) 3.0 (6-8, 8-10)
HD6793 Level One SK70704 1168 1CT:1.8 CTS 2.06 40 2.0 (2-4) 2.0 (6-7, 9-10)
DC bias Dielectric
Part capacity strength Return loss min Longitudinal balance typ THD typ
number (mA) min (V) (dB) (dB) (dB)
HD6788 160 1500 18 @ 40 - 200 kHz 69 @ 30 kHz 63 @ 196 kHz -74 @ 100 kHz
HD6789 160 1500 16.5 @ 40 - 320 kHz 77 @ 30 kHz 63 @ 292 kHz -74 @ 100 kHz
HD6790 80 1500 18 @ 40 - 200 kHz 68 @ 30 kHz 56 @ 196 kHz -74 @ 100 kHz
HD6791 80 1500 16.5 @ 40 - 320 kHz 75 @ 30 kHz 62 @ 292 kHz -74 @ 100 kHz
HD6792 80 1500 18 @ 40 - 200 kHz 60 @ 30 kHz 48 @ 196 kHz -75 @ 5 kHz
HD6793 80 1500 16.5 @ 40 - 320 kHz 60 @ 30 kHz 48 @ 292 kHz -74 @ 5 kHz
Specifications
1. All electrical specifications referenced to line side.
2. Operating temperature range -40°C to +85°C.
3. Electrical specifications at 25°C.
This product is not RoHS-compliant. Contact Coilcraft
for current status or possible alternatives.
US
UK
Taiwan
China
Singapore
+1-847-639-6400 sales@coilcraft.com
+44-1236-730595 sales@coilcraft-europe.com
+886-2-2264 3646 sales@coilcraft.com.tw
+86-21-6218 8074 sales@coilcraft.com.cn
+ 65-6484 8412 sales@coilcraft.com.sg
© 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
HD6788, HD6789, HD6790, HD6791
HDSL Transformers
HD6792
HD6793
A max B max C max D min E F typ G typ H typ
0.950 1.05 0.46 0.12 0.800 0.150 0.017 × 0.038 0.025 × 0.045 inches
24,13 26,7 11,7 3,0 20,32 3,81 0,43 × 0,97 0,64 x 1,14 cm
E
Recommended
BoardLayout
H
F
Packaged 49 per tray
Document 201-2 Revised 02/11/08