Features
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mark owned by Bluetooth SIG, Inc., U.S.A. and licensed for use by RFMD. All other trade names, trademarks and registered trademarks are the property of their respective owners. ©2006, RF Micro Devices, Inc.
Product Description
7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical
support, contact RFMD at (+1) 336-678-5570 or sales-support@rfmd.com.
XFM-1901-1UH
1:1 SMT TRANSFORMER
The XFM-1901-1UH transformer is designed for applications that require small, low
cost, and highly reliable surface mount components. Applications may be found in
broadband, wireless, and other communications systems. These transformers are
built Lead-Free and RoHS compliant.
Frequency Range 800MHz to
1900MHz
Impedance Ratio: 1:1 Unbalanced to
Unbalanced
Low Cost and RoHS Compliant
Industry Standard SMT package
Available in Tape-and -Reel
50Ω Nominal Impedance
EDS-XFM-1901-1UH Rev 4
RoHS Compliant and Pb-Free Product
Package: S03
XFM-19 01-
1UHXFM-
1901-1U H
Specifications
Parameter Specification Unit
Min. Typ. Max.
Frequency Range 800 1900 MHz
Insertion Loss <1dB 800 1400 MHz
Insertion Loss <2dB MHz
Insertion Loss <3dB 800 1900 MHz
Impedance Ratio 1:1
Type Unbalanced to Unbalanced
I nser t i on Los s
-3.5
-3
-2.5
-2
-1.5
-1
-0.5
0
0.5
800 900 1000 1100 1200 1300 1400 1500 1600 1700 1800 1900
Frequency, MHz
dB
S21 S31
I nput Ret ur n Loss
-40
-35
-30
-25
-20
-15
-10
-5
0
800 900 1000 1100 1200 1300 1400 1500 1600 1700 1800 1900
Frequency, MHz
dB
Schematic
2 of 2 EDS-XFM-1901-1UH Rev 4
7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical
support, contact RFMD at (+1) 336-678-5570 or sales-support@rfmd.com.
XFM-1901-1UH
Phase Balance
170
175
180
185
190
800 900 1000 1100 1200 1300 1400 1500 1600 1700 1800 1900
Frequency, MHz
Degrees
Amplitude Balance
-1
-0.8
-0.6
-0.4
-0.2
0
0.2
0.4
0.6
0.8
1
800 900 1000 1100 1200 1300 1400 1500 1600 1700 1800 1900
Freque ncy, M Hz
dB
Pin Out
Pin Name
1Secondary
2NC
3Secondary DOT
4Primary DOT
5Primary
Exceeding any one or a combination of the Absolute Maximum Rating conditions may cause
permanent damage to the device. Extended application of Absolute Maximum Rating condi-
tions to the device may reduce device reliability. Specified typical performance or functional
operation of the device under Absolute Maximum Rating conditions is not implied.
RoHS status based on EUDirective2002/95/EC (at time of this document revision).
The information in this publication is believed to be accurate and reliable. However, no
responsibility is assumed by RF Micro Devices, Inc. ("RFMD") for its use, nor for any infringe-
ment of patents, or other rights of third parties, resulting from its use. No license is granted
by implication or otherwise under any patent or patent rights of RFMD. RFMD reserves the
right to change component circuitry, recommended application circuitry and specifications
at any time without prior notice.
Absolute Maximum Ratings
Parameter Rating Unit
RF Power +33 dBm
Operating Temperature -55 to +100 °C
Storage Temperature -55 to +100 °C
Package Drawing - S03
