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Document 255
ADSL Interface Transformers
For Virata
Beryllium chipset
This product is not RoHS-compliant. Contact Coilcraft
for current status or possible alternatives.
These transformers provide coupling and line isolation
for ADSL interfaces using the Virata Beryllium chip set.
They feature very low leakage inductance, stable primary
inductance from -40°C to +85°C and longitudinal balance
optimized for the best overall performance at ADSL trans-
mission speeds.
In addition to the standard model shown, Coilcraft can
provide custom transformers with other turns ratios.
For free evaluation samples or to discuss custom designs,
contact Coilcraft or visit www.coilcraft.com.
Part
number
Style
Chip set
X8388-C
SMT
Virata Beryllium
Line side
inductance
(mH)
600 ±5%
Leakage
inductance
max (µH)
DCR max (Ohms)
Chip side     Line side
6 1.27 (7-6), 1.19 (9-8) 1.16 (2-3, 4-5)
Part
number
Dielectric
strength
Turns ratio
(V) line : chip
X8388-C 2300 1 : 1.21
Longitudinal
balance
min (dB)
45 (20 kHz – 600 kHz)
Designed
to meet
UL 1950
1. All electrical specifications referenced to line side.
2. Operating temperature range -40°C to +85°C.
3. Electrical specifications at 25°C.
6
A
10
Dot above pin1
5
C
1
B
A max B max C max E
F typ G typ
0.530 0.699 0.500 0.590 0.098 0.061 × 0.050
13,46 17,75 12,70 14,99 2,50 1,55 × 1,27
E
F
Line side Chip side
29
38
47
Recommended
Land Pattern
G
5
6
Tape and reel: 175/13reel  32 mm tape width
For packaging data see Tape and Reel Specifications section.
US +1-847-639-6400 sales@coilcraft.com
UK +44-1236-730595 sales@coilcraft-europe.com
Taiwan +886-2-2264 3646 sales@coilcraft.com.tw
China +86-21-6218 8074 sales@coilcraft.com.cn
Singapore + 65-6484 8412 sales@coilcraft.com.sg
Document 255  Revised 11/02/04
© 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.