X8390-A Datasheet, PDF (1/1 Pages) Coilcraft lnc. – xDSL Interface Transformers

Document 231
xDSL Interface Transformers
For LT1794,
and LT1886
LT1795
This product is not RoHS-compliant. Contact Coilcraft
for current status or possible alternatives.
These transformers provide coupling and line isolation
for xDSL interfaces using the Linear Technology LT1794,
LT1795 and LT1886 amplifiers.
They feature very low leakage inductance, stable pri-
mary inductance from -40°C to +85°C and longitudinal
balance optimized for the best overall performance at
ADSL and HDSL2 transmission speeds.
In addition to the standard models shown, Coilcraft can
provide custom transformers with other turn ratios.
For free evaluation samples or to discuss custom de-
signs, contact Coilcraft or visit www.coilcraft.com.
Part
number
X8390-A
X8502-A
X8505-A
X8504-A
Style
SMT
SMT
SMT
SMT
Chip set
LT1794, LT1886
LT1794, LT1886
LT1886
LT1795
Line side
inductance
(mH)
0.368 ±5%
0.368 ±5%
0.368 ±5%
0.368 ±5%
Leakage
inductance
(µH) max
11
11
11
11
DCR max (Ohms)
Chip side
Line side
0.841 (6-9, 7-10)
0.895 (6-9, 7-10)
0.750 (6-9, 7-10)
0.875 (6-9, 7-10)
1.95 (4-2)
1.70 (4-2)
1.85 (4-2)
1.75 (4-2)
Part
number
X8390-A
X8502-A
X8505-A
X8504-A
Dielectric
strength
(V)
1500
1500
1500
1500
Turns ratio¹
line : chip
Longitudinal
balance
(dB) min
1:1
1 : 1.2
1 : 1.5
1 : 1.4
45 (20 kHz - 1.1 MHz)
42 (20 kHz - 1.1 MHz)
42 (20 kHz - 1.1 MHz)
42 (20 kHz - 1.1 MHz)
Designed
to meet
UL 1459, 1950
UL 1459, 1950
UL 1459, 1950
UL 1459, 1950
1. Turns ratio is with the chip side windings connected in series.
2. All electrical specifications referenced to line side.
3. Operating temperature range -40°C to +85°C.
4. Electrical specifications at 25°C.
Dot above pin1
5
6
E
F
A
C
Line side
4
2
Chip side
6
9
7
1
10
B
A max B max
0.530 0.699
13,46 17,75
C max
0.500
12,70
E
0.590
14,99
F typ
0.098
2,50
G typ
0.061 × 0.050
1,55 × 1,27
G
Recommended
Land Pattern
10
Chip side windings to be
connected in series on the
PC board
Tape and reel 175 per 13″ reel Plastic tape: 32 mm wide,
0.5 mm thick, 28 mm pocket spacing, 12.93 mm pocket depth
Specifications subject to change without notice.
Please check our website for latest information.
Document 231 Revised 01/16/08
© Coilcraft, Inc. 2007