ADVANCE PRODUCT SUMMARY
SKY77519 TX-RX FEM for Quad-Band GSM / GPRS / EDGE –
Single-Band WCDMA Antenna Switch Support
Applications
•
Quad-band cellular handsets
encompassing
-
Class 4 GSM850/900
-
Class 1 DCS1800 PCS1900
-
Class 12 GPRS multi-slot
operation
-
EDGE polar modulation
-
Single-band WCDMA antenna
switch support
Description
SKY77519 is a transmit and receive Front End Module (FEM) designed in a very low profile
(1.1 mm), compact form factor for quad-band cellular handsets comprising GSM850/900,
DCS1800, and PCS1900 operation — a complete transmit VCO-to-Antenna and Antenna-to-
receive SAW filter solution. The FEM also supports Class 12 General Packet Radio Service
(GPRS) multi-slot operation and EDGE Polar Modulation. WCDMA switch-through support is
provided by a dedicated high-linearity port.
The module consists of a GSM850/900 PA and DCS1800/PCS1900 PA block, impedance-
matching circuitry for 50
Ω
input and output impedances, TX harmonic filtering, high linearity-
low insertion loss switches, and a CMOS Power Amplifier Control (PAC) block. A custom silicon
integrated circuit contains decoder circuitry to control the RF switch while providing a low
current external control interface.
Fabricated in InGaP/GaAs, the Heterojunction Bipolar Transistor (HBT) PA blocks support the
GSM850/900 bands and DCS1800/PCS1900 bands. Both PA blocks share common power
supply pins to distribute current. The output of the PA block and the outputs to the five receive
pins connect to the antenna pin through a highly linear antenna switch. The InGaP/GaAs die,
switch die, Silicon (Si) controller die, and passive components are mounted on a multi-layer
laminate substrate and the entire assembly is encapsulated with plastic overmold.
RF input and output ports of the SKY77519 are internally matched to a 50
Ω
load to reduce the
number of external components for a quad-band design. Extremely low leakage current
(10
µA,
typical) of the FEM module maximizes handset standby time. Band selection and
control of transmit and receive RF signal flows are performed by use of four external control
pins. See
Figure 1
shown below. Mode of operation Tx, Rx, Band (GSM850, GSM900, DCS,
PCS, and WCDMA) is controlled with 4 logic inputs: BS1, BS2, Mode, and Enable. Proper
timing of the Enable input and the Amplitude control input (Vampl) ensures high isolation high
isolation between the antenna and TX-VCO while the VCO is being tuned prior to the transmit
burst. The Enable input controls the initial turn-on of the PAC circuitry to minimize battery
drain.
The integrated power amplifier control (PAC) function provides envelope amplitude control by
reducing sensitivity to input drive, temperature, power supply, and process variation.
Features
•
Small outline: 6 mm x 6 mm
•
Very low profile: 1.1 mm max.
•
28-pin package
•
Low input power range
-
0 to 6 dBm
•
High efficiency
-
GSM850 40%
-
GSM900 40%
-
DCS 35%
-
PCS 35%
•
TX-VCO-to-antenna and antenna-
to-RX-SAW filter RF interface
•
TX harmonics below -35dBm
•
Wideband envelop control path
•
Input/Output matching 50
Ω
internal
•
Low APC current: 20
µA
•
High impedance control inputs
15
µA,
typical
•
Gold plated, lead-free contacts
Skyworks offers lead
(Pb)-free "environmentally
friendly" packaging
that is RoHS compliant
(European Parliament
for the Restriction of
Hazardous Substances).
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com
200500P2 • Skyworks Proprietary and Confidential Information • Products and Product Information are Subject to Change Without Notice. • March 22, 2006
1
ADVANCE DATA SHEET • SKY77519
SKY77519 TX-RX FEM FOR QUAD-BAND GSM / GPRS / EDGE –
SINGLE BAND WCDMA ANTENNA SWITCH SUPPORT
DCS/PCS_IN
VBATT
MODE
VAPC
Enable
Band Sel1
Band Sel2
GND
GSM_IN
Match
DCS/PCS_OUT
Match/
Filter
SKY77519
WCDMA1
ANTENNA
SWITCH
To
Antenna
Feedpoint
GSM_OUT
Match/
Filter
PA
CMOS
Collector
Voltage
Amplitude
Controller
and
Antenna
Switch
Decoder
HBT
PA
Match
RX1
RX2
RX3
RX4
200447_001
Figure 1. SKY77519 Functional Block Diagram
© 2006, Skyworks Solutions, Inc. All Rights Reserved.
Information in this document is provided in connection with Skyworks Solutions, Inc. ("Skyworks") products. These materials are provided by Skyworks as a service to its customers and may be
used for informational purposes only. Skyworks assumes no responsibility for errors or omissions in these materials. Skyworks may make changes to its products, specifications and product
descriptions at any time, without notice. Skyworks makes no commitment to update the information and shall have no responsibility whatsoever for conflicts, incompatibilities, or other difficulties
arising from future changes to its products and product descriptions.
No license, express or implied, by estoppel or otherwise, to any intellectual property rights is granted by this document. Except as may be provided in Skyworks’ Terms and Conditions of Sale for
such products, Skyworks assumes no liability whatsoever.
THESE MATERIALS ARE PROVIE "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESS OR IMPLIED, RELATING TO SALE AND/OR USE OF SKYWORKS™ PRODUCTS INCLUING WARRANTIES
RELATING TO FITNESS FOR A PARTICULAR PURPOSE, MERCHANTABILITY, PERFORMANCE, QUALITY OR NON-INFRINGEMENT OF ANY PATENT, COPYRIGHT OR OTHER INTELLECTUAL PROPERTY
RIGHT. SKYWORKS FURTHER DOES NOT WARRANT THE ACCURACY OR COMPLETENESS OF THE INFORMATION, TEXT, GRAPHICS OR OTHER ITEMS CONTAINED WITHIN THESE MATERIALS.
SKYWORKS SHALL NOT BE LIABLE FOR ANY SPECIAL, INDIRECT, INCIDENTAL, OR CONSEQUENTIAL DAMAGES, INCLUING WITHOUT LIMITATION, LOST REVENUES OR LOST PROFITS THAT MAY
RESULT FROM THE USE OF THESE MATERIALS.
Skyworks™ products are not intended for use in medical, lifesaving or life-sustaining applications. Skyworks’ customers using or selling Skyworks™ products for use in such applications do so at
their own risk and agree to fully indemnify Skyworks for any damages resulting from such improper use or sale.
The following are trademarks of Skyworks Solutions, Inc.: Skyworks™, the Skyworks symbol, and “Breakthrough Simplicity”™. Product names or services listed in this publication are for
identification purposes only, and may be trademarks of third parties. Third-party brands and names are the property of their respective owners.
Additional information, posted at www.skyworksinc.com, is incorporated by reference.
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com
2
March 22, 2006 • Skyworks Proprietary and Confidential Information • Products and Product Information are Subject to Change Without Notice. • 200500P2
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