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SKY77584 Datasheet(PDF) 1 Page - Skyworks Solutions Inc.

Part No. SKY77584
Description  Low transmit supply current
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Maker  SKYWORKS [Skyworks Solutions Inc.]
Homepage  http://www.skyworksinc.com
Logo SKYWORKS - Skyworks Solutions Inc.

SKY77584 Datasheet(HTML) 1 Page - Skyworks Solutions Inc.

  SKY77584 Datasheet HTML 1Page - Skyworks Solutions Inc. SKY77584 Datasheet HTML 2Page - Skyworks Solutions Inc.  
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Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com
202746B • Skyworks Proprietary and Confidential Information • Products and Product Information are Subject to Change Without Notice. • February 20, 2013
SKY77584 Tx-Rx Quad-Band Front-End Module for GSM/
GPRS (824-915 MHz) (1710-1910 MHz) w/ Four Linear TRx
Switch Ports
• Quad-band cellular handsets
Class 4 GSM850/GSM900
Class 12 GPRS multi-slot
EDGE downlink compatible
• High efficiency
• Low transmit supply current
• 50 Ω matched Input/Output
• Tx–VCO-to-antenna and
antenna-to-Rx-SAW filter RF
• RF switch affords high
linearity, low insertion loss,
and 0 V DC on Rx ports
• Small, low profile package
6 mm x 6 mm x 0.9 mm
28-pad configuration
SKY77584 is a transmit and receive Front-End Module (FEM) with integrated power amplifier
control designed in a low profile, compact form factor for quad-band cellular handsets comprising
GSM850/GSM900 and DCS1800/PCS1900 operation. The SKY77584 offers 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 downlink.
The module consists of a GSM850/GSM900 PA block and a DCS1800/PCS1900 PA block,
impedance-matching circuitry for 50 ohm input and output impedances, Tx harmonics filtering,
high linearity / low insertion loss RF switch, and a Power Amplifier Control (PAC) block. One PA
block supports the GSM850 / GSM900 bands and the other PA block supports the DCS1800/
PCS1900 bands. Both PA blocks share common power supply pads to distribute current. The
output of each PA block and the outputs to the four receive pads are connected to the antenna pad
through an RF switch. Four broadband interchangeable receive ports provide flexibility to support
multimode and multiband configurations. The GaAs die, the CMOS die, the Switch die, and passive
components are mounted on a multi-layer laminate substrate. The assembly is encapsulated with
plastic overmold.
Band selection and control of transmit and receive are performed using four external control pads.
Refer to the block diagram in Figure 1 below. The band select pad, BS1, BS2, Mode, and TxEN
select GSM850, GSM900, DCS, and PCS modes of operation.
Transmit enable TxEN controls receive or transmit mode of the RF switch (Tx = logic 1). Proper
timing between transmit enable TxEN and Analog Power Control VRAMP allows for high isolation
between the antenna and Tx–VCO while the VCO is being tuned prior to the transmit burst.
The SKY77584 is compatible with logic levels from 1.2 V to 2.9 V for BS1, BS2, MODE, and TxEN

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