HD6788 Datasheet, PDF (1/2 Pages) Coilcraft lnc. – HDSL Transformers

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
HD6788
HD6789
HD6790
HD6791
HD6792
HD6793
Chip set
Brooktree BT8952
Brooktree BT8952
Brooktree BT8921
Brooktree BT8921
Level One SK70704
Level One SK70704
Data
rate
(kb/s)
784
1168
784
1168
784
1168
Turns
ratio
chip:line
Primary
inductance
± 6% (mH)
2CT:1:1
3.0
2CT:1:1
2.0
1CT:1:1
3.0
1CT:1:1
2.0
1CT:1.8 CT
1CT:1.8 CTS
2.75
2.06
Leakage
inductance
max (µH)
20
20
20
20
45
40
DCR max (Ohms)
Chip side Line side
4.4 (2-4)
4.4 (2-4)
2.2 (6-7, 8-9)
2.2 (6-7, 8-9)
2.2 (2-4)
2.2 (2-4)
2.2 (6-7, 8-9)
2.2 (6-7, 8-9)
3.2 (2-4)
2.0 (2-4)
3.0 (6-8, 8-10)
2.0 (6-7, 9-10)
Part
number
HD6788
HD6789
HD6790
HD6791
HD6792
HD6793
DC bias
capacity
(mA)
160
160
80
80
80
80
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
1. All electrical specifications referenced to line side.
2. Operating temperature range -40°C to +85°C.
3. Electrical specifications at 25°C.
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
© Coilcraft, Inc. 2007
Specifications subject to change without notice.
Please check our website for latest information. Document 201-1 Revised 02/11/08