SkyOne™ Multiband Multimode Front-end Module for Quad-Band GSM / GPRS / EDGE – Penta-Band (Bands I, II, III, V, VIII) WCDMA / HSPA / HSPA+ / LTE

The SKY78011-21 SkyOne™ is a hybrid, multimode, multiband Front-End Module (FEM) that supports 2.5G and 3G / 4G handsets and operates efficiently in GSM, GPRS, EDGE, WCDMA, HSPA, and LTE modes. The FEM consists of a GSM800/EGSM900 PA block, a DCS1800/PCS1900 PA block, separate WCDMA blocks operating in the low and high bands, a logic control block for multiple power control levels, and band enable functions in both cellular and UMTS. RF I/O ports are internally matched to 50  to minimize the number of external components. Extremely low leakage current maximizes handset standby time. The InGaP/GaAs die and passive components are mounted on a multi-layer laminate substrate and the assembly encapsulated in plastic overmold.

GSM / EDGE: The SKY78011-21 uses a new compact architecture supporting the GSM850, EGSM900, DCS1800 and PCS1900 bands. The FEM also supports 2.5G Class 12 Enhanced General Packet Radio Service (EGPRS) multi-slot operation and EDGE linear modulation.

WCDMA: The SKY78011-21 uses an enhanced architecture to: support WCDMA/High-Speed Downlink Packet Access (HSDPA) and High-Speed Uplink Packet Access (HSUPA) modulations; cover multiple bands for 3GPP, including bands I, II, III, V, and VIII; operate at different power modes. The module is fully controllable via four logic lines and band-enable interfaces.

LTE: The SKY78011-21 meets spectral linearity requirements of LTE modulation with QPSK/16QAM up to 20 MHz bandwidth, including various resource block allocations, with good power-added efficiency.

Receiver Section: The SKY78011-21 has integrated Duplexers, RX SAWs and SP12T SOI switch to provide 2G / 3G / 4G Rx paths from antenna to LNA port of RFIC. Optimized “Rx paths and matching circuits” with well-grounded guard trace (high Tx–Rx isolation) inside module mitigate de-sense problem and enhance sensitivity performance.

TRx Port: The SKY78011-21 provides three vacant broadband TRx ports for additional band requirements.

Please note: SKY78011-21 is being discontinued and is not recommended for new designs. The suggested replacement is SKY77643-11.


    • Hybrid architecture: separate GSM, WCDMA paths
    • 50 Ω I/O impedances, integrated DC blocking on all ports
    • Separate single-ended GSM and WCDMA inputs and outputs
    • Integrated coupler with coupled port for 3G/4G band operation
    • Integrated 2.5G DCS/PCS Rx filter
    • CMOS-compatible four-line logic input plus HB/LB enable
    • VCC stages for 2.5G / 3G can attach to battery or buck DC/DC
    • Small, low profile package:
      • 7 mm x 9.8 mm x 1.05 mm
      • 60-pad configuration
      • 2.5G features:
        • EGPRS Class 12 multi-slot operation
        • Two RF POUT control levels using digital logic interface
        • Linear PA with bias optimization for efficiency/linearity trade-off in 8PSK mode
      • 3G features:
        • WCDMA mode supports output power, bandwidth for bands I, II, III, V, VIII through integrated select switch
        • Two RF POUT control levels using digital logic interface
        • Linear amplifiers with bias optimization and low/high mode gain switch for best efficiency/linearity tradeoff
      • 4G features:
        • LTE supports output power, bandwidth bands I, II, III, V, VIII
        • Bands I, II, III up to 20 MHz bandwidth
        • Bands V, VIII up to 10 MHz bandwidth

    Images & Diagrams


    • Band
    • I
    • Frequency (MHz)
    • 1920-1980
    • Package
    • MCM, 60-pad
    • Package (mm)
    • 7.0 x 9.8 x 1.05

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