HRF24B21AN UZ2400 Data Sheet 2.4 GHz IEEE Std. 802.15.
HRF24B21AN ©2021 Honeycomb Technologies Advance Information 2 page
HRF24B21AN 2.4 GHz IEEE Std. 802.15.4™ RF Transceiver Module Features: ⚫ IEEE 802.15.4-2006 Compliant RF Transceiver ⚫ Small Size: 25mm*12.5mm Surface Mountable ⚫ Integrated Crystal, Internal Voltage Regulator, Matching Circuitry and PCB Antenna. ⚫ Radio Regulation Certification for United States (FCC ID) ⚫ Up to 300m Range (outdoor, line-of-sight) Operational: ⚫ Operating Voltage: 2.0V-3.6V(3.3V typical) ⚫ Temperature Range: -20°C to +60°C ⚫ Simple, Four-Wire SPI Interface RF/Analog ⚫ ISM band 2.405~2.
HRF24B21AN ⚫ Digital VCO and filter calibration ⚫ High receiver and RSSI dynamic range ⚫ 1M/2M bps turbo mode supported Mac/Baseband ⚫ IEEE 802.15.
HRF24B21AN Device Overview HRF24B21AN is a solution that complies with IEEE 802.15.4-2006 specifications. It integrates a 2.4 GHz RF transceiver with an IEEE802.15.4 compliant Baseband/MAC block within a single chip. The HRF24B21AN can be controlled by a microprocessor (e.g. 8051) for low-data-rate applications such as home automation, industrial automation, consumer electronics, PC peripheral …etc.
HRF24B21AN FIGURE 3: MICROCONTROLLER TO HRF24B21AN INTERFACE Mounting Details The HRF24B21AN is a surface mountable module. Module dimensions are shown in Figure 4. The module Printed Circuit Board (PCB) is 0.032" thick with castellated mounting holes on the edge. Figure 5 is a recommended host PCB footprint for the HRF24B21AN. The HRF24B21AN has an integrated PCB antenna. For the best performance, follow the mounting details shown in Figure 6.
HRF24B21AN FIGURE 5 RECOMMENDED PCB FOOTPRINT FIGURE 6 MOUNTING DETAILS ©2021 Honeycomb Technologies Advance Information 7 page
HRF24B21AN CIRCUIT DESCRIPTION The HRF24B21AN is a complete 2.4 GHz IEEE 802.15.4-2006 compliant surface mount module with integrated crystal, internal voltage regulator, matching circuitry and PCB antenna. The HRF24B21AN module interfaces to many popular micro-controllers via a 4-wire serial SPI interface, interrupt, wake, Reset, power and ground. SCHEMATIC A schematic diagram of the module is shown in Figure 7 and the Bill of Materials (BOM) is shown in Table 2.
HRF24B21AN TABLE 2 HRF24B21AN BILL OF MATERIALS Printed Circuit Board The HRF24B21AN module printed circuit board is con-structed with FR4 material, two layers and 0.8mm thick. The layers are shown in Figure 8 through Figure 9.
HRF24B21AN FIGURE 9 BOTTOM COPPER FIGURE 10 PCB LAYER STACK UP PCB Antenna The PCB antenna is fabricated on the top copper trace. Figure 11 shows the trace dimensions. The layers below the antenna have no copper traces. The ground and power planes under the components serve as a counterpoise to the PCB antenna. Additional ground plane on the host PCB will substantially enhance the performance of the module.
HRF24B21AN FIGURE 11 PCB LAYER STACK UP ©2021 Honeycomb Technologies Advance Information 11 page
HRF24B21AN FCC compliance information statement This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications.
HRF24B21AN Regulation Information 1) List of applicable FCC rules: FCC part 15.249 2) Summarize the specific operational use conditions This Device and its antenna must not be co-located or operating in conjunction with any other antenna or transmitter. The host product manufacturer should state this information to the host instruction manual. 3)Limited module procedures: This module is only use for battery-powered product.
