HJ-840

RF Transceiver Modules And Modems Overview

The HJ-840 is a chip-level System in Package (SIP) Bluetooth module based on the nRF52840 SoC, manufactured by HJSIP. It supports BLE 5.1 and 5.2 protocols, along with Zigbee and ANT multi-mode connectivity. The module features an integrated antenna and is housed in an LGA64 package with dimensions of 6.2 x 7 x 0.9 mm. It offers a wide voltage supply range of 1.7V to 5.5V, supporting both normal and high voltage modes for adaptable power solutions.

RF Transceiver Modules And Modems Feature Summary

• Supports BLE 5.1/5.2, Zigbee, and ANT multi-mode wireless transmission
• Integrated antenna design within ultra-small LGA64 SIP package
• Wide voltage input capability from 1.7V to 5.5V
• Transparent UART port interface for IoT functionality

RF Transceiver Modules And Modems Applications

• Internet of Things (IoT) devices requiring wireless transmission
• Embedded systems utilizing transparent UART communication
• Industrial automation applications needing low-power connectivity
• Smart home products requiring multi-protocol support

RF Transceiver Modules And Modems Procurement Notes

Verify that the specific order matches the HJ-840 part number to ensure correct nRF52840-based specifications. Confirm compliance requirements such as FCC, CE, IC, and RoHS certifications are applicable to your target market. Ensure the host system provides the required 1.7V–5.5V supply range. Check for any specific ordering suffixes that may alter pinout or certification status before finalizing procurement.

RF Transceiver Modules And Modems Selection Notes

Select this module when a compact form factor is critical due to its 6.2x7mm size. Choose it for projects requiring multiple wireless standards like BLE, Zigbee, and ANT simultaneously. It is suitable for designs needing flexible power management across 1.7V to 5.5V ranges. Consider it for UART-based IoT implementations where low power consumption and small footprint are prioritized over raw processing speed.

RF Transceiver Modules And Modems Part Context

HJ-840 belongs to the HJSIP family of chip-level SIP Bluetooth modules. It shares the manufacturer's focus on ultra-small sizes and low power consumption. Other models in the series include HJ-180IMH and HJ-380IMH. Unlike general PCBA modules, this component integrates the radio and baseband into a single package, simplifying RF design for engineers developing wireless embedded solutions.

RF Transceiver Modules And Modems Replacement Considerations

No public confirmed substitute part numbers are available in the provided documentation. Engineers should verify compatibility with existing firmware and hardware layouts if considering alternative nRF52840-based modules from other manufacturers.