SM540-1 & PT541-1 ADSL Line Transformers
Features
■For use with Alcatel’s MTK-20140
ADSL chipset
■Excellent Total Harmonic Distortion
(THD) Performance
■Both SMT and Thru-Hole package version
■Small size
■Operating temperature -40 °C to +85 °C
■Designed to meet UL1950 and EN60950
supplementary insulation requirements
for operating voltages up to 250 Vrms
■Lead free version available (see How to
Order)
■Lead free versions are RoHS compliant*
Applications
■ADSL - Alcatel MTK20140
Electrical Specifications @ 25 °C
Turns Ratio (1-4):(10-7) (line to chip)
SM540-1 ................................1:1 ±2 %
PT541-1 ................................2:1 ±2 %
OCL @ 10 kHz, 0.1 V
(1-4) with (2-3) shorted
SM540-1........................480 µH ±10 %
PT541-1 ........................410 µH ±10 %
Leakage Inductance @ 300 kHz 0.1 V
(1-4) with (2-3), (7-10), (8-9) shorted
SM540-1 ........................10.0 µH max.
PT541-1 ............................6.5 µH max.
Longitudinal Balance
30 kHz to 1.1 MHz ............-40 dB min.
Insertion Loss
@ 100 kHz and 1.1 MHz ..........<1.0 dB
Isolation Voltage ............1500 Vrms max.
DC Resistance
(1-4) with (2-3) shorted
SM540-1 ............................1.0 Ωmax.
PT541-1 ..............................0.6 Ωmax.
THD Linearity
SM540-1 @ 10 kHz (min.) ..-72 dB typ.
PT541-1 @ 20 kHz (min.) ....-72 dB typ.
Application
SM540-1........................................CPE
PT541-1 ..........................................CO
Product Dimensions
Electrical Schematic
DIMENSIONS ARE: MM
(INCHES) TOLERANCE: ± 0.25
(.010)
SM540-1
(DATECODE)
5
4
3
2
1
6
7
8
9
10
.711 ± .050
(.028 ± .002)
Recommended PAD layout
10 PLCS.
1.30 ± .050
(.051 ± .002) 10 PLCS.
13.46
(.530)MAX. 10.00
(.394)MAX.
17.65
(.695)MAX.
13.50
(.531)MAX.
12.32
(.485)MAX. 12.07
(.475)MAX.
2.50
(.098)
2.54
(.100)
2.50
(.098)
10.00
(.394)
15.37
(.605)
0.13
(.005)
10 SURFACES
SMT
10
8
9
7
1
3
2
4
SM540-1
PT541-1
THT
PT541-1
(DATECODE)
2.6
(.102)
DIA.
10 PLCS.
MIN.
14.0
(.551)MAX. 14.2
(.559) MAX.
12.70
(.500)MAX.
0.6
(.024) 10.00
(.394) 10.00
(.394)
2.50
(.098)
Packaging Specifications
SM540-1E* ..........................200 pcs./reel
PT541-1 ................................60 pcs./tray
*”E” suffix at end of part number
designates tape & reel packaging, e.g.
SM540-1E.
*RoHS COMPLIANT
VERSIONS
AVAILABLE
03/05
*RoHS Directive 2002/95/EC Jan 27 2003 including Annex
Specifications are subject to change without notice.
Customers should verify actual device performance in their specific applications.
How to Order
SM540-1E or PT541-1 __
Model
Termination
Blank = Tin-lead
L = Tin only (lead free)
