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Description
The SKY77438-17 is a transmit and receive Front End Module (FEM) designed in a low profile (1.2 mm), compact form factor for quad-band cellular handsets. It supports GSM850/900, DCS1800, and PCS1900 operation, making it 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 separate GSM850/900 and DCS1800/PCS1900 PA blocks, internal circuitry for matching to 50 Ω input and output impedances, TX harmonics filtering, high linearity and low insertion loss PHEMT RF switches, diplexer, and an integrated power amplifier control (iPAC™) function that utilizes an internal current-sense resistor. Two Heterojunction Bipolar Transistor (HBT) PA blocks are fabricated onto a single Gallium Arsenide (GaAs) die; one supports the GSM850/900 bands and the other supports the DCS1800 and PCS1900 bands. Both PA blocks share common power supply pins to distribute current. The output of each PA block and the outputs to the four receive pins are connected to the antenna pin through PHEMT RF switches and a diplexer. The GaAs die, PHEMT dies, Silicon (Si) die, and passive components are mounted on a multi-layer laminate substrate. The assembly is encapsulated with plastic overmold.
Specifications and features
- High efficiency: GSM850 43%, GSM900 43%, DCS 40%, PCS 40%
- Internal ICC sense-resistor for iPAC
- Closed loop iPAC or open loop operation with external PAC circuit
- Input/Output matching 50 ohms internal (with DC blocking)
- TX-VCO-to-antenna and antenna-to-RX-SAW filter RF interface
- TX harmonics below -33 dBm
- PHEMT RF switches afford high linearity, low insertion loss and less than 20 µA supply current in receive modes
- Small outline: 8 mm x 10 mm
- Low profile: 1.2 mm maximum
- Low APC current: 20 µA
- Gold plated, lead free contacts
- High impedance control inputs, 15 µA, typical
Application Scenarios
The SKY77438-17 is ideal for quad-band cellular handsets that require Class 4 GSM850/900, Class 1 DCS1800 PCS1900, and Class 12 GPRS multi-slot operation.
Comparison
Advantages- Compact and low profile design
- Supports quad-band operation
- High efficiency
- Integrated power amplifier control function
- Gold plated, lead-free contacts
Disadvantages- Requires external PAC circuit for open loop operation
- Low impedance control inputs, 15 µA
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Datasheet
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Shopping guide
Delivery period:
- - Will ship out in 2-3 days
- - DHL Express: 3-7 business days
- - DHL eCommerce: 12-22 business days
- - FedEx International Priority: 3-7 business days
- - EMS: 10-15 business days
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Popular parts of the same kind
- Datasheet: Download SKY77438-17
- Chipdatas Part: CD94-SKY77438-17
- Warehouse: China, Hong Kong
- Dispatch: Within 24 hours
- Free Shipping: Yes
- Prority Shipping: Yes, 3-5 days
- Last Updated: 2024/10/01 01:00 +0800
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- Full Refund if you don't receive your order
- Full or Partial Refund , If the item is not as described
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The fee is charged according to the rule of PayPal.
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Western Union charge US$0.00 banking fee.
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