Specifications are subject to change without notice.
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
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)
Packaging Specifications
SM540-1* ............................200 pcs./reel
PT541-1 ................................60 pcs./tray
*”E” suffix at end of part number
designates tape & reel packaging, e.g.
SM540-1E.
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04/03