Position: Home > DataSheet > Index S > SKY Series > SKY77423-12, SKY77425-15, SKY77500

Low Cost Custom Prototype PCB Manufacturer

SKY77423-12, SKY77425-15, SKY77500

Table of contents:
Info of SKY77423-12
Info of SKY77425-15
Info of SKY77500

SKY77423-12, SKY77425-15, SKY77500 Selling Leads, Datasheet

MFG:N/A Package Cooled:QFN D/C:N/A

SKY77423-12, SKY77425-15, SKY77500 Picture

SKY77423-12, SKY77425-15, SKY77500 Datasheet download

Five Points

Part Number: SKY77423-12

MFG: N/A

Package Cooled: QFN

D/C: N/A

Attentive hint

Want to post a buying lead? If you are not a member yet, please select the specific/related part number first and then fill the quantity and your contact details in the "Request for Quotation Form" on the left, and then click "Send RFQ".Your buying lead can then be posted, and the reliable suppliers will quote via our online message system or other channels soon.

How to buy ?

How long will receive a response.

Top Sellers:

TOP

SKY77500 General Description

The SKY77500 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 comprising GSM850/900, DCS1800, and PCS1900 operation-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 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. A custom silicon integrated circuit contains decoder circuitry to control the RF switches while providing a low current external control interface. 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. Band selection and control of transmit and receive RF signal flows are performed by use of three external control pins. See Figure 1 shown below. Two band select pins select GSM, DCS or PCS modes of operation and the TX_RX pin selects the receive or transmit mode of the respective RF switch (TX = logic 1). Proper timing of the logic on this pin, PAC Enable, and Analog Power Control (APC) allow for high isolation between the antenna and TX-VCO while the VCO is being tuned prior to the transmit burst. The PAC Enable input allows initial turn-on of the PAC circuitry to minimize battery drain.

SKY77500 Maximum Ratings

High efficiency
Internal ICC sense-resistor for PAC
TX-VCO-to-antenna and Antenna-to-RX-SAW filter interface
Closed loop iPAC? operation or open loop (external PAC)
Low APC current,

SKY77500 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 A supply current in receive modes
• Small outline
- 8 mm x 10 mm
• Low profile
- 1.2 mm maximum
• Low APC current:
- 20 A
• Gold plated, lead free contacts
• High impedance control inputs, 15 A, typical

SKY77500 Typical Application

• Quad-band cellular handsets comprised of
- Class 4 GSM850/900
- Class 1 DCS1800 PCS1900
- Class 12 GPRS multi-slot operation

Hotspot Suppliers Product

Product List A B C D E F G H I J K L M N O P Q R S T U V W X Y Z 0 1 2 3 4 5 6 7 8 9

MT58L64L18CT-10

Price: 4-6 USD

MT58L64L18CT-10 TQFP100
DL-7140-211M

Price: 5-6.5 USD

DL-7140-211M laser tube
74LVC74APG

Price: 4-5 USD

74LVC74APG - IC FLIP FLOP D-Type POS-EDG DUAL 14TSSOP
CY28346ZI-2

Price: 6.5-8 USD

CYPRESS - Clock Synthesizer with Differential CPU Outputs
PI5V330QEX

Price: 0.284-0.286 USD

PI5V330QEX Pericom Multiplexer Switch ICs
BSM300GA120DN2

Price: 1-2 USD

IGBT power module, Single switch, 1200 V, Collector-emitter voltage, 430A
SVA150XG04TB

Price: 1-2 USD

a-Si TFT-LCD, NEC, 228.096Hmm, 560V
PC354N1

Price: 0.124-0.2 USD

PC354N1T - Mini-flat Package, AC Input Type Photocoupler - Sharp Electrionic Components
RL1210JR-070R22L

Price: 0.177-0.178 USD

RL1210JR51-XX-BL - Thick Film Chip Resistor Low Ohmic - TAITRON Components Incorporated
STPS140A

Price: 0.053-0.055 USD

STPS140A - POWER SCHOTTKY RECTIFIER - STMicroelectronics
STA013

Price: 1.45-1.5 USD

STA013 - MPEG 2.5 LAYER III AUDIO DECODER - STMicroelectronics
SMBJ5347B

Price: 0.073-0.075 USD

SMBJ5347B - 5 Watt Surface Mount Silicon Zener Diodes - Micro Commercial Components