IN Brief:
- Nordic's nRF54LS05A and nRF54LS05B have entered mass production, with general distributor availability expected shortly.
- The devices combine a 128 MHz Cortex-M33 processor and 0.5 MB non-volatile memory, with 64 KB or 96 KB RAM.
- Smaller package options are sampling, while a new two-layer PCB reference design supports the original 6 × 6 mm package.
Nordic Semiconductor has moved its nRF54LS05A and nRF54LS05B wireless system-on-chips into mass production, expanding manufacturing availability of its entry-level Bluetooth Low Energy hardware for connected products produced in large volumes.
The devices combine a 128 MHz Arm Cortex-M33 processor with a 2.4 GHz radio, 0.5 MB of non-volatile memory, and an integrated set of peripherals intended for relatively simple sensing and communication applications. Nordic has also introduced smaller package options and a two-layer printed circuit board reference design to support more compact and cost-sensitive hardware.
The production milestone follows the original introduction of the nRF54LS05 devices in March 2026. Both variants are now in volume production, while general availability through the manufacturer's distribution network is expected to expand. The associated nRF54LS05 development kit is already available from distributors.
Many connected sensors, asset tags, and wireless control products exchange relatively small quantities of information. Their hardware requirements differ from those of embedded devices running complex graphical interfaces or computationally demanding applications, making processor selection, memory capacity, radio efficiency, and circuit board cost important design considerations.
The nRF54LS05 family addresses this operating profile through a common processing and radio architecture. The nRF54LS05A includes 64 KB of RAM, while the nRF54LS05B increases that capacity to 96 KB. Both devices provide approximately 0.5 MB of non-volatile storage for firmware and related application data.
Available RAM influences the software functions that can operate simultaneously. Communication buffers, sensor data, application variables, and temporary processing requirements must share the memory provided by the device. An additional 32 KB can accommodate more complex software behaviour, although the appropriate variant depends on the compiled application and its peak memory usage.
The 128 MHz Cortex-M33 processor provides general-purpose embedded processing alongside the integrated radio. It can manage sensor interfaces, local control functions, communication protocols, and application logic without requiring a separate microcontroller in products whose processing requirements remain within the device's capabilities.
Peripheral connections include SPI, I²C-compatible two-wire communication, UART, analogue-to-digital conversion, pulse-width modulation, and quadrature decoding. These interfaces allow the system-on-chip to communicate with common sensors, switches, and other electronic components, reducing the number of external devices needed in relatively simple designs.
Wireless communication supports Bluetooth Low Energy and proprietary 2.4 GHz protocols. Nordic specifies proprietary operating modes with data rates up to 4 Mbps, but that figure must be distinguished from the data rates defined for standard Bluetooth LE operation.
The radio has a maximum specified transmit power of +4 dBm and receiver sensitivity of approximately -96 dBm in the 1 Mbps Bluetooth LE mode. These specifications describe semiconductor radio performance; the achievable range of a finished product will also depend on antenna efficiency, enclosure materials, interference, orientation, and the surrounding environment.
Nordic's preliminary power characteristics indicate receive current of approximately 3.4 mA and transmit current of approximately 4.8 mA at 0 dBm output power under stated operating conditions. Sleep-mode consumption is specified in the microampere range, allowing applications with infrequent communications to spend much of their operating life in a lower-power state.
The total energy consumption of a connected device depends on how frequently it transmits, receives, and processes information. A battery-powered sensor that wakes periodically to send a short measurement can have a substantially different energy requirement from a device maintaining frequent wireless exchanges or processing continuous peripheral input.
System power design must also account for the host application, peripheral sensors, external memory, and voltage regulation. Published radio current measurements therefore provide information for calculating an energy budget but do not establish a fixed battery life for every product using the same semiconductor.
The devices were initially introduced in 6 × 6 mm packages. Nordic has now added three smaller package options, reducing the minimum footprint to 4 × 4 mm. Samples of the additional package configurations are available through the company's sales organisation, although Nordic has not stated that all of these variants have entered volume production.
Smaller packages create opportunities to reduce board dimensions, but they can also increase routing density and assembly demands. The number and arrangement of external connections, antenna feed design, and available board layers must be evaluated before selecting a package for a production design.
Nordic has introduced a two-layer PCB reference design for the original 6 × 6 mm configuration. Using two layers rather than four can simplify printed circuit board fabrication and reduce the material and processing requirements associated with an individual board, particularly when the same design is manufactured in large quantities.
The reduced layer count does not eliminate radio-frequency layout requirements. Antenna matching, ground continuity, component placement, and the routing of digital signals still influence the wireless system's electrical characteristics and electromagnetic performance.
Nordic's reference layout provides a starting point for these decisions, while the finished PCB will need to be checked against the antenna arrangement, enclosure, and other components used in the application. Modifying the reference design can alter the radio-frequency behaviour even when the semiconductor and firmware remain unchanged.
The nRF54LS05 devices use Nordic's existing software and development environment, including the nRF Connect SDK and its Bare Metal development option. This allows software work to remain within the manufacturer's established ecosystem and provides a migration path for selected applications previously developed around nRF52 hardware.
Moving software between semiconductor families may still require changes to peripheral configuration, memory allocation, device drivers, and low-power operation. Pin compatibility is also limited to the specific package and device combinations identified by Nordic rather than applying universally across the complete nRF54L portfolio.
The nRF54LS05A and nRF54LS05B are intended for products such as industrial sensors, asset tracking tags, beacons, remote controls, and other compact connected equipment. Their common processing platform, differing RAM capacities, and revised packaging options provide several design configurations as Nordic expands production and distribution availability.
