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SKY77521-14
SKY77521-14 - Brand New SKYWORKS IC Chips
Credit Card - One-month free return and one year warranty.
- Full or Partial Refund, if the item is not as described
- Full Refund if you don't receive your order
Description
The SKY77527-21 Tx Front End Module (FEM) is designed in a compact form factor
for quad-band cellular handsets comprising GSM850/900, DCS1800, PCS1900,
supporting GMSK and linear EDGE modulation. Class 12 General Packet Radio
Service (GPRS) multi-slot operation is also supported.
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, a
multifunction power amplifier control (MFC) block, low pass harmonic rejection
filters, and an SP6T Antenna T/R switch.
Two separate Heterojunction Bipolar Transistor (HBT) PA blocks are fabricated
onto an InGaP die; one supports the GSM850/900 bands, the other supports the
DCS1800/PCS1900 bands. The InGaP PA die, the silicon MFC die, PHEMT switch
die, and the passive components are mounted on a multi-layer laminate
substrate. The assembly is encapsulated with plastic overmold.
Band select (BS1 and BS2) circuitry is used to select the desired Tx and Rx
frequency bands; MODE circuitry selects GMSK modulation (logic 0) or EDGE
modulation (logic 1); VRAMP controls the output power for GMSK modulation; and
VBIAS provides bias optimization for EDGE and GMSK modulation depending on the
state of MODE control.
The Multi-function Control (MFC) provides “pinout” for interoperation with an
external power control loop. The external circuit uses the Linear Detector
output to provide closed loop power control in both EDGE and GMSK modes of
operation. The power control loop together with the MFC will reduce
sensitivity to antenna load, input drive, temperature, power supply, and
process variation. The combined circuit configures the PA for fixed gain in
8PSK mode while providing the ability to optimize the PA bias at different
power levels to maximize efficiency.
Features
• High efficiency:
- GSM850
38% @ 32.7 dBm
- GSM900
38% @ 32.7 dBm
- DCS1800
33% @ 30.9 dBm
- PCS1900
31% @30.9 dBm
• Low loss PHEMT RF antenna switch
• Detector output: linear V/V
• Small outline: 8 x 6 mm
• Low profile: 1.12 mm Max.
• Low VRAMP current
Applications
• Quad-band cellular handsets:
GMSK Modulation:
- Class 4 GSM850/900
- Class 1 DCS1800/
PCS1900
- Class 12 GPRS multi-slot
operation
EDGE modulation:
- Class E2 GSM850/900
- Class E2 DCS1800/PCS1900
Shipping
| First item | Additional item | Service | Description |
|---|---|---|---|
| $0.00 | Free | Free Shipping | Estimated 15-30 business days via Registered Air Mail or others |
| $27.50 | Free | Expedited Shipping | Estimated delivery time is 3-5 business days, with some areas possibly taking 6-9 business days depending on the shipping address. The main courier companies include but are not limited to UPS, DHL, and FedEx. |
| $0.00 | Free | Buyer cooperating carrier | Using buyer's cooperating carrier. Buyer should create a shipping label and share it to us. And then we will call carrier for pickup |
| $38.00 | Free | Expedited Shipping | Estimated delivery time is 3-5 business days, with some areas possibly taking 6-9 business days depending on the shipping address. The main courier companies include but are not limited to UPS, DHL, and FedEx. |
Delivery
- The transportation time may be delayed due to customs clearance, local holidays or abnormal events.
- The estimated time is based on the fastest speed provided by commercial couriers (DHL, FedEx, UPS etc).
- The estimated time does not include the lead time of the item. The lead time of most items is 2–5 business days. If more than 5 working days are needed, we will manually confirm with you.
| Flag | Country | Express Delivery | Standard Delivery |
|---|---|---|---|
 | United States | 3 - 5 days | 10-15 days |
 | Canada | 3 - 5 days | 10-20 days |
 | Mexico | 3 - 5 days | 10-17 days |
 | Germany | 3 - 5 days | 10-12 days |
 | Italy | 3 - 5 days | 10-15 days |
 | United Kingdom | 3 - 5 days | 10-12 days |
Estimated Delivery
This item requires 2-5 business days for processing before shipping after payment is confirmed. And depending on the destination and shipping method.
Return Policy
| Return window | Refund type | Return shipping |
|---|---|---|
| 60 days after receiving item | Money Back or Replacement | Buyer pays for return shipping |
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