■ Designed to meet UL1950 and EN60950
supplementary insulation requirements
for operating voltages up to 250 Vrms
■ Lead free version available (see How to
Order)
Features
PT541-1
■ 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
SM540-1
■ Lead free versions are RoHS compliant*
Applications
■ ADSL - Alcatel MTK20140
SM540-1 & PT541-1 ADSL Line Transformers
Electrical Specifications @ 25 °C
Product Dimensions
Turns Ratio (1-4):(10-7) (line to chip)
SM540-1 ................................1:1 ±± ꢀ
PT541-1 ................................±:1 ±± ꢀ
OCL @ 10 kHz, 0.1 V
SMT
15.37
(.605)
(1-4) with (±-3) shorted
.711 ± .050
(.028 ± .002)
10 PLCS.
2.50
(.098)
2.54
(.100)
SM540-1........................480 µH ±10 ꢀ
PT541-1 ........................410 µH ±10 ꢀ
Leakage Inductance @ 300 kHz 0.1 V
(1-4) with (±-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
5
4
6
7
10.00
(.394)
13.46
(.530)
10.00
(.394)
SM540-1
3
±
1
8
MAX.
MAX.
2.50
(.098)
(DATECODE)
9
10
1.30 ± .050
(.051 ± .002)
17.65
MAX.
(.695)
10 PLCS.
Recommended PAD layout
13.50
MAX.
(.531)
(1-4) with (±-3) shorted
SM540-1 ............................1.0 Ω max.
PT541-1 ..............................0.6 Ω max.
THD Linearity
12.32
(.485)
12.07
(.475)
MAX.
MAX.
SM540-1 @ 10 kHz (min.) ..-7± dB typ.
PT541-1 @ ±0 kHz (min.)....-7± dB typ.
Application
SM540-1........................................CPE
PT541-1 ..........................................CO
0.13
(.005)
10 SURFACES
THT
Packaging Specifications
SM540-1E* ..........................±00 pcs./reel
PT541-1 ................................60 pcs./tray
*”E” suffix at end of part number
designates tape & reel packaging, e.g.
SM540-1E.
PT541-1
(DATECODE)
Electrical Schematic
1
10
12.70
(.500)
MAX.
3
2
8
9
4
7
2.6
(.102)
MIN.
0.6
(.024)
DIA.
2.50
(.098)
10.00
(.394)
How to Order
10.00
(.394)
14.2
10 PLCS.
SM540-1E or PT541-1 __
14.0
MAX.
(.551)
MAX.
(.559)
Model
Termination
Blank = Tin-lead
L = Tin only (lead free)
MM
(INCHES)
0.25
(.010)
DIMENSIONS ARE:
TOLERANCE:
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.