DATA SHEET SKY65313-21: 900 MHz Transmit/Receive Front-End Module Applications Control Automated meter reading Digital Control Logic VPC Advanced metering infrastructure Matching PA Transmit ISM systems Network Harmonic Filter Features Matching Matching Antenna LNA RX3 Transmit output power > +30.5 dBm Network Network High efficiency PA Analog power control RX1 RX2 S2124 Receive path NF <1.9 dB Figure 1. SKY65313-21 Block Diagram LNA bypass mode Integrated control logic Description Internal RF match and bias circuits The Skyworks SKY65313-21 is a high-performance, All RF ports internally DC blocked transmit/receive (T/R) front-end module (FEM). The device Shutdown mode provides a complete T/R chain with T/R switches. Small footprint, MCM (28-pin, 6 x 6 mm) package The device transmit chain features +30.5 dBm output power and (MSL3, 260 C per JEDEC J-STD-020) a 40 percent power-added efficiency (PAE). TM The device receive chain features a low noise amplifier (LNA) with Skyworks Green products are compliant with a 1.4 dB noise figure (NF) and 16.6 dB gain. The cascaded NF and all applicable legislation and are halogen-free. gain, taking into account the 0.5 dB insertion loss For additional information, refer to Skyworks TM transmit/receive antenna switch, are 1.9 dB and 16.1 dB, Denition of Green , document number respectively, which makes the SKY65313-21 ideal for medium SQ040074. power microwave links such as 900 MHz Industrial, Scientific and Medical (ISM) band applications. The module also has a shut-down mode and LNA bypass mode to minimize power consumption. GND 1 28 27 26 25 24 23 22 GND The device is mounted in a 28-pin, 6 x 6 mm Multi-Chip Module (MCM) surface-mount technology (SMT) package, which allows 2 21 CTL1 GND for a highly manufacturable low-cost solution. 3 20 CTL2 TX A block diagram of the SKY65313-21 is shown in Figure 1.The CTL3 4 19 GND device package and pinout are shown in Figure 2. Signal pin 5 18 VPC RX3 assignments and functional pin descriptions are provided in GND VCC RX 6 17 Table 1. 7 16 ANT VDD1 8 9 10 11 12 13 14 15 GND GND S2126 Figure 1. SKY65313-21 Pinout (Top View) Skyworks Solutions, Inc. Phone 781 376-3000 Fax 781 376-3100 sales skyworksinc.com www.skyworksinc.com 202121C Skyworks Proprietary Information Products and Product Information are Subject to Change Without Notice September 13, 2017 1 GND GND RX1 GND GND VCC TX3 GND VCC TX2 RX2 VCC TX1 GND VDD2DATA SHEET SKY65313-21: 900 MHz TRANSMIT/RECEIVE FRONT-END MODULE Table 1. SKY65313-21 Signal Descriptions Pin Name Description Pin Name Description 1 GND Ground 15 GND Ground 2 CTL1 Transmit/receive mode digital control input 16 VDD1 3.3 V power supply 3 CTL2 Shutdown mode digital control input 17 VCC RX 3.3 V power supply 4 CTL3 Receive bypass mode digital control input 18 RX3 LNA and bypass switch output port. Internally matched to 50 . 5 VPC Transmit output power analog control voltage input 19 GND Ground 6 GND Ground 20 TX PA input port. Internally matched to 50 . 7 ANT Antenna switch common port. Internally matched to 50 . 21 GND Ground 8 GND Ground 22 GND Ground 9 GND Ground 23 VDD2 4.0 V power supply 10 RX1 Receive arm of antenna switch. Internally matched to 50 . 24 VCC TX1 4.0 V power supply 11 GND Ground 25 VCC TX2 4.0 V power supply 12 GND Ground 26 VCC TX3 4.0 V power supply 13 RX2 LNA and bypass switch input port 27 GND Ground 14 GND Ground 28 GND Ground Receive Path Technical Description The receive path contains an LNA with bypass switch. The LNA The SKY65313-21 consists of a complete T/R chain with T/R impedance matching networks are internal to the module and switches contained in the module. A single-pole, double-throw have been optimized for a low NF while maintaining good return (SPDT) switch selects between the receive and transmit paths. losses into a 50 source and load impedance. The receive arm The module has a shut-down mode to minimize power of the SPDT switch and the LNA input are connected to module consumption. pins to allow an external filter to be inserted into the receive path. Three digital input pins (CTL1, CTL2, and CTL3) are used to select between transmit, receive, receive bypass, or shutdown mode. Operation Mode Control The four SKY65313-21 operating modes are controlled by the Transmit Path three digital pins: CTL1, CTL2, and CTL3 (pins 2, 3, and 4, The transmit path contains a power amplifier (PA) optimized for respectively). The control logic truth table is provided in Table 2. saturated performance. The PA output is internally matched for optimum output power and efficiency into a 50 load Electrical and Mechanical Specifications impedance. The PA output is passed through an harmonic filter The absolute maximum ratings of the SKY65313-21 are provided before being fed through the SPDT switch. The PA input provides in Table 3. Recommended operating conditions are specified in a good return loss into a 50 source impedance. Table 4. Electrical specifications are provided in Tables 5, 6, Transmit output power is controlled by the VPC pin, which is and 7. normally set to 2.25 V DC voltage. The nominal DC input Typical performance characteristics of the SKY65313-21 are impedance into the VPC pin is 50 k. illustrated in Figures 3 through 22. Skyworks Solutions, Inc. Phone 781 376-3000 Fax 781 376-3100 sales skyworksinc.com www.skyworksinc.com 2 September 13, 2017 Skyworks Proprietary Information Products and Product Information are Subject to Change Without Notice 202121C