SKY77531 Skyworks Solutions, SKY77531 Datasheet
SKY77531
Manufacturer Part Number
SKY77531
Description
TX-RX IPAC FEM Quad-Band GSM/GPRS
Manufacturer
Skyworks Solutions
Datasheet
1.SKY77531.pdf
(2 pages)
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
SKY77531
Manufacturer:
SKYWORKS
Quantity:
11 200
Part Number:
SKY77531
Manufacturer:
SKYWORKS/思佳讯
Quantity:
20 000
Company:
Part Number:
SKY77531-11
Manufacturer:
KEMET
Quantity:
30 000
Company:
Part Number:
SKY77531-11
Manufacturer:
SKYWORKS
Quantity:
12 470
Company:
Part Number:
SKY77531-11
Manufacturer:
SKYWORKS
Quantity:
4 122
Part Number:
SKY77531-11
Manufacturer:
SKYWORKS/思佳讯
Quantity:
20 000
PRODUCT SUMMARY
SKY77531 Tx–Rx iPAC
Applications
• Quad-band cellular handsets
Features
• High efficiency
• Low transmit supply current
• Internal ICC sense resistor for
• Closed loop iPAC
• 50 Ω matched Input/Output
• TX–VCO-to-antenna and
• TX harmonics below –33 dBm
• PHEMT RF switch affords high
• Small outline: 6 mm x 8 mm
• Low profile: 1.05 mm
• Compatible with multiple logic
• Low APC current: 25 μA
encompassing
- Class 4 GSM850/900
- DCS1800/PCS1900
- Class 12 GPRS multi-slot
- 48% (GSM850/900)
- 41% (DCS1800/PCS1900)
- 1.26 A (GSM850/900)
- 0.90 A (DCS1800/PCS1900)
iPAC
antenna-to-RX-SAW filter RF
interface
linearity, low insertion loss,
and less than 20 μA supply
current in receive modes
families
operation
200644A • Skyworks Proprietary and Confidential Information • Products and Product Information are Subject to Change Without Notice. • February 6, 2007
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com
Description
The SKY77531 is a transmit and receive front-end module (FEM) with Integrated Power Amplifier
Control (iPAC
operation. Designed in a low profile, compact form factor, the SKY77531 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.
The module consists of a GSM850/900 PA block and a DCS1800/PCS1900 PA block, impedance-
matching circuitry for 50 Ω input and output impedances, TX harmonics filtering, high linearity and
a low insertion loss PHEMT RF switch, and a Power Amplifier Control (PAC) block with internal
current sense resistor. A custom BiCMOS integrated circuit provides the internal PAC function and
decoder circuitry to control the RF switches. The two Heterojunction Bipolar Transistor (HBT) PA
blocks are fabricated onto a single Gallium Arsenide (GaAs) die. One PA block supports the
GSM850/900 band and the other PA block supports the DCS1800/PCS1900 band. Both PA blocks
share common power supply pads to distribute current. The output of each PA block and the
outputs to the two receive pads are connected to the antenna pad through a PHEMT RF switch. The
GaAs die, PHEMT die, Silicon (Si) 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 pads, BS1 and BS2, select CEL,
GSM, DCS and PCS modes of operation. Transmit enable TX_EN and transmit switch enable
TX_SW_EN control receive or transmit mode of the RF switch (TX = logic 1). Proper timing
between transmit enable TX_EN 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 SKY77531 is compatible with logic levels from 1.2 V to VCC for BS1, BS2, TX_EN, and
TX_SW_EN pads, depending on the level applied to the VLOGIC pad. This feature provides
additional flexibility for the designer in the selection of FEM interface control logic.
™
™
) for quad-band cellular handsets comprising GSM850/900 and DCS1800/PCS1900
FEM for Quad–Band GSM/GPRS
Figure 1. SKY77531 Functional Block Diagram
www.DataSheet4U.com
Related parts for SKY77531
Image
Part Number
Description
Manufacturer
Datasheet
Request
R
Part Number:
Description:
Frequency Mixer
Manufacturer:
Mini-Circuits
Datasheet:
Part Number:
Description:
Level 13 (LO Power +13dBm) 2500 to 6000 MHz
Manufacturer:
Mini-Circuits
Datasheet:
Part Number:
Description:
Manufacturer:
Skyworks Solutions Inc
Datasheet:
Part Number:
Description:
Manufacturer:
Skyworks Solutions Inc
Datasheet:
Part Number:
Description:
Manufacturer:
Skyworks Solutions Inc
Datasheet:
SKY77531 Summary of contents
Page 1
... TX–VCO while the VCO is being tuned prior to the transmit burst. antenna-to-RX-SAW filter RF interface The SKY77531 is compatible with logic levels from 1 VCC for BS1, BS2, TX_EN, and • TX harmonics below –33 dBm TX_SW_EN pads, depending on the level applied to the VLOGIC pad. This feature provides additional flexibility for the designer in the selection of FEM interface control logic. • ...
Page 2
... Ordering Information Model Number Manufacturing Part Number SKY77531 SKY77531 Revision History Revision Date A February 6, 2007 B May 30, 2008 ©2007–2008, Skyworks Solutions, Inc. All Rights Reserved Information in this document is provided in connection with Skyworks Solutions, Inc. (“Skyworks”) products or services. These materials, including the information contained herein, are provided by Skyworks as a service to its customers and may be used for informational purposes only by the customer ...