DATA SHEET SKY66121-11: 169 to 170 MHz Transmit / Receive Front-End Module Applications Automated meter reading Output Matching Network Advanced metering infrastructure PA OUT TX IN ISM systems Logic Control PA TX Regulator Features RX Transmit output power: >+30 dBm Filter ANT High efficiency PA TX ALT SPDT Receive loss with filter: 0.9 dB 204599-001 Sleep mode current: < 1 A Figure 1. SKY66121-11 FEM Block Diagram Integrated control logic Small footprint MCM (16-pin, 4 x 4 mm) package (MSL3, 260 C per JEDEC J-STD-020) Description The SKY66121-11 is a high-performance, transmit / receive (Tx / Rx) front-end module (FEM). The device includes a power TM Skyworks Green products are compliant with amplifier (PA) capable of more than +30 dBm of transmit output all applicable legislation and are halogen-free. power (VCC = 3.6 V). For additional information, refer to Skyworks TM All functionality can be controlled by a two-wire interface. The Denition of Green , document number FEM can be placed in a deep sleep mode, drawing less than SQ040074. 1 A of current. The receive chain consists of a low-loss single-pole, double-throw (SPDT) switch. Three separate VCC pins enable maximum RF isolation. The SKY66121-11 is packaged in a 16-pin, 4 x 4 mm Multi-Chip Module (MCM), which allows for a highly manufacturable low-cost solution. A functional block diagram of the SKY66121-11 is shown in Figure 1. The 16-pin MCM package and pinout are shown in Figure 2. Signal pin assignments and functional pin descriptions are provided in Table 1. Skyworks Solutions, Inc. Phone 781 376-3000 Fax 781 376-3100 sales skyworksinc.com www.skyworksinc.com 204599G Skyworks Proprietary Information Products and Product Information are Subject to Change Without Notice September 18, 2019 1 CSD CTXDATA SHEET SKY66121-11: TRANSMIT / RECEIVE FEM 1 16 15 14 13 CSD PA OUT 2 12 GND TX 3 CTX 11 GND RX TX IN 4 10 7 9 GND 5 6 8 TX ALT 204599-002 Figure 2. SKY66121-11 Pinout (Top View) Table 1. SKY66121-11 Signal Descriptions Pin Name Description Pin Name Description 1 CSD Control, shutdown/sleep, active low 9 GND Ground 2 TX Transmit RF input 10 TX IN Transmit input. Externally filtered signal 3 CTX Control, transmit modes 11 GND Ground 4 RX Receive RF output 12 GND Ground 5 TX ALT Alternative transmit RF input 13 PA OUT PA output 6 GND Ground 14 VCC2 Supply for second stage of PA 7 N/C No connection 15 VCC0 Supply for logic, regulator, bias 8 ANT Antenna I/O 16 VCC1 Supply for first stage of PA Technical Description Electrical and Mechanical Specifications The SKY66121-11 consists of a complete Tx/Rx chain with Tx/Rx The absolute maximum ratings of the SKY66121-11 are provided switches contained in the module. An SPDT switch selects in Table 2. The recommended operating conditions are specified between receive and transmit paths. The module has a shutdown in Table 3 and electrical specifications are provided in Tables 4 mode to minimize power consumption. through 7. Two digital input control pins (CSD and CTX) are used to select The state of the SKY66121-11 is determined by the logic provided between shutdown or Tx/Rx, respectively. in Table 8. Typical performance characteristics are shown in Figures 3 through 10. The transmit path contains a PA optimized for saturated performance. The PA can be passed through an external impedance matching network and harmonic filter before being fed through the SPDT switch. External inductors for each of the two PA stages provide maximum application flexibility. Skyworks Solutions, Inc. Phone 781 376-3000 Fax 781 376-3100 sales skyworksinc.com www.skyworksinc.com 2 September 18, 2019 Skyworks Proprietary Information Products and Product Information are Subject to Change Without Notice 204599G VCC1 GND VCC0 N/C VCC2 ANT