Texas Instruments CC2538NF53RTQR

Overview

CC2538NF53RTQR from Texas Instruments is a 2.4-GHz IEEE 802.15.4/6LoWPAN/ZigBee® wireless microcontroller SoC featuring an ARM Cortex-M3 core (32 MHz), 512 KB flash, 32 KB RAM, and integrated RF transceiver with –97 dBm sensitivity and 7 dBm programmable output power. It serves as the central processing and radio node in low-power mesh networks for smart grid endpoints and industrial sensor nodes.

For engineers reviewing the CC2538NF53RTQR datasheet, CC2538NF53RTQR pinout, CC2538NF53RTQR application, or CC2538NF53RTQR equivalent, this page delivers verified specifications, validated QFN56 pin mapping, confirmed ECC/RSA hardware exclusion, real-world low-power mode currents (0.4 µA in PM3), and two field-tested alternative SoCs for ZigBee 3.0 and Thread migration paths.

Technical Context

The CC2538NF53RTQR implements a tightly coupled ARM Cortex-M3 MCU with on-chip flash and RAM, paired with a fully integrated 2.4-GHz IEEE 802.15.4 PHY/MAC radio subsystem including packet-handling and command-strobe processors. Its RF chain supports direct-conversion architecture with differential RF_P/RF_N I/O and calibrated frequency synthesis across 2394–2507 MHz.

Hardware security acceleration includes AES-128/256 and SHA-256 engines, but explicitly omits ECC-128/256 and RSA hardware - a key differentiator from the SF53 variant. Power management features five defined modes, with PM3 delivering 0.4 µA retention current while preserving 16 KB RAM and configuration registers.

Key Specifications

Pinout & Package

CC2538NF53RTQR uses an 8 mm × 8 mm QFN-56 package (RTQ) with exposed thermal pad. Pin numbering follows TI's top-view layout; all 56 terminals are electrically assigned per official signal descriptions.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar wireless microcontroller applications.

Compared with CC2538NF53RTQR, CC2652R1F offers broader protocol flexibility and higher compute headroom but removes USB and increases package complexity, while EM3581-RTR delivers lower active power and simpler toolchain support at the expense of modern development ecosystem integration and peripheral richness.

Availability

CC2538NF53RTQR is available at Aetrix Electronics and suitable for smart grid endpoints, home automation hubs, and industrial wireless sensor networks requiring stable component supply across extended product lifecycles.

Supply support for CC2538NF53RTQR includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Texas Instruments is a global semiconductor leader focused on analog, embedded processing, and connectivity technologies, serving industrial, automotive, and communications markets with high-reliability silicon and comprehensive design resources.

The CC2538 product line was engineered specifically for standards-compliant, low-power 2.4-GHz wireless mesh networking - targeting ZigBee Home Automation, Smart Energy, and IEEE 802.15.4–based proprietary protocols in resource-constrained edge devices.

FAQ

What distinguishes CC2538NF53RTQR from the CC2538SF53RTQR variant?

The CC2538NF53RTQR excludes ECC-128/256 and RSA hardware acceleration engines present in the SF53 variant, while retaining identical 512 KB flash, 32 KB RAM, RF performance (–97 dBm sensitivity, 7 dBm output), and QFN56 packaging. This makes CC2538NF53RTQR suitable for AES/SHA-based security implementations where asymmetric cryptography is handled externally or in software, reducing die cost and power.

Does CC2538NF53RTQR support USB device functionality out of the box?

Yes, CC2538NF53RTQR integrates a full-speed USB 2.0 device controller operating at 12 Mbps. It requires dedicated DVDD_USB (3.3 V) supply, USB_P/USB_N differential pair routing, and appropriate termination. TI's ROM bootloader and SmartRF Flash Programmer leverage this interface for firmware updates without JTAG.

What is the minimum supply voltage for CC2538NF53RTQR in Power Mode 3?

CC2538NF53RTQR operates down to 2.0 V in Power Mode 3, drawing just 0.4 µA while retaining 16 KB RAM and configuration registers. Below 1.4 V at >70°C, register/RAM corruption may occur; system design must ensure supply remains within 2.0–3.6 V during PM3 to guarantee data integrity.

Can CC2538NF53RTQR achieve IEEE 802.15.4 channel agility across the full 2.4-GHz band?

Yes, CC2538NF53RTQR supports programmable RF frequency from 2394 MHz to 2507 MHz in 1-MHz steps, covering all 16 IEEE 802.15.4 channels (2405–2483.5 MHz) with ±150 ppm frequency error tolerance - meeting specification requirements for channel hopping, DFS, and regulatory compliance in FCC/ETSI regions.

Is the 32.768-kHz crystal oscillator mandatory for CC2538NF53RTQR operation?

No - CC2538NF53RTQR includes a calibrated 32-kHz RC oscillator usable for sleep timer and low-power timing. However, the 32.768-kHz crystal (on PD6/PD7) is required for precise RTC operation, IEEE 802.15.4 superframe timing, and applications demanding <±40 ppm accuracy across temperature and voltage.