Texas Instruments RF430CL330HCPWR

Overview

RF430CL330HCPWR from Texas Instruments is a Dynamic NFC Interface Transponder compliant with NFC Tag Type 4 and ISO/IEC 14443B, integrating a 13.56-MHz RF interface and dual-mode wired I²C/SPI host interface. It provides 3 KB of SRAM for NDEF messages, automatic NDEF structure validation, and an interrupt output (INTO) to signal read/write completion. It enables tap-to-pair handover for Bluetooth and Wi-Fi in portable diagnostic and sensor systems.

For engineers reviewing the RF430CL330HCPWR datasheet, RF430CL330HCPWR pinout, RF430CL330HCPWR application, or RF430CL330HCPWR equivalent, key selection criteria include NFC Tag Type 4 compliance, 3 KB NDEF SRAM capacity, dual I²C/SPI interface configurability, ISO14443B uplink/downlink data rates up to 848 kbps, and TSSOP-14 package compatibility with antenna tuning requirements.

Technical Context

The RF430CL330HCPWR implements an MSP430-based processing unit managing both RF and serial communication layers. Its ISO14443B-compliant RF front-end includes an ASK demodulator supporting 106–848 kbps downlink and a load modulator with 0.2–1 MHz uplink subcarrier modulation, enabling full NFC Forum Tag Type 4 protocol stack execution.

Serial interface mode (I²C or SPI) is determined at power-up by the logic level on SCMS/CS, with internal pullup enabling SPI as default. I²C addressing uses pins E0–E2 to configure bits 2:0 of the 7-bit address (0x50–0x57); SPI mode supports CPOL/CPHA configurations via E0/E1, and both interfaces support BIP-8 parity for robust register access.

Key Specifications

Pinout & Package

TSSOP-14 (PW) package, 5.0 mm × 4.4 mm body size, with exposed thermal pad for improved thermal dissipation in compact PCB layouts.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar NFC transponder applications.

Compared with ST25DV04K-IER and NT3H2111, RF430CL330HCPWR uniquely combines SPI/I²C dual interface, 3 KB NDEF SRAM, RF field-powered operation down to 2.0 V, and hardware NDEF validation-making it optimal for industrial diagnostics and multi-protocol handover where deterministic host control and payload flexibility are essential.

Availability

RF430CL330HCPWR is available at Aetrix Electronics and suitable for Bluetooth pairing, diagnostic interface, and Wi-Fi configuration applications requiring stable component supply, long-lifecycle support, and consistent TSSOP-14 packaging.

Supply support for RF430CL330HCPWR 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 company delivering analog, embedded processing, and connectivity solutions for industrial, automotive, and personal electronics markets.

The RF430CL330HCPWR belongs to TI's Dynamic NFC Interface Transponder product line, designed specifically to simplify wireless handover and secure credential exchange between NFC readers and host microcontrollers in resource-constrained embedded systems.

FAQ

What is the primary function of the RF430CL330HCPWR in an embedded system?

The RF430CL330HCPWR serves as a Dynamic NFC Interface Transponder that bridges NFC readers and host microcontrollers via I²C or SPI. It stores and manages NDEF messages in 3 KB SRAM, validates NDEF structure automatically, and signals host events via the INTO pin. In practice, RF430CL330HCPWR enables tap-initiated Bluetooth pairing, Wi-Fi provisioning, and diagnostic data exchange without requiring the host MCU to implement full NFC protocol stacks.

How does the RF430CL330HCPWR determine whether to use I²C or SPI communication?

The RF430CL330HCPWR samples the SCMS/CS pin during power-up initialization to select interface mode: low = I²C, high = SPI (default, due to internal pullup). After initialization, SCMS/CS functions as chip select in SPI mode. This decision is latched and cannot be changed dynamically during operation. The RF430CL330HCPWR does not support runtime switching; interface selection must be fixed at design time via external pin biasing.

What antenna design considerations apply to the RF430CL330HCPWR?

The RF430CL330HCPWR requires a 13.56 MHz LC resonant circuit connected to ANT1/ANT2. Key parameters include coil inductance LRES ≈ 2.66 µH and total resonance capacitance CRES = CIN + CTune ≈ 51.8 pF, where CIN is 31.5–38.5 pF (device internal). External CTune must compensate for CIN variation and PCB parasitics. Impedance should be 6.5–15.5 kΩ, and peak antenna voltage must stay ≤3.6 V. The RF430CL330HCPWR integrates a limiter to clamp overvoltage, but proper tuning remains essential for reliable 10 cm+ read range.

Does the RF430CL330HCPWR support secure element functionality or cryptographic operations?

No, the RF430CL330HCPWR does not include a secure element, hardware crypto accelerator, or tamper-resistant memory. It provides NDEF message storage and structure validation but relies entirely on the host MCU for encryption, authentication, or key management. Security-sensitive applications (e.g., payment credentials or firmware signing keys) must store secrets externally and use RF430CL330HCPWR solely as a transport layer for authenticated payloads managed by the host.

Can the RF430CL330HCPWR operate without a host microcontroller connected?

Yes-the RF430CL330HCPWR can respond to NFC readers independently when powered by the RF field alone (passive mode), provided VCC is ≥2.0 V. In this state, it exposes its NDEF memory to readers but cannot execute host-triggered actions (e.g., updating sensor data). Full functionality-including writing NDEF content, configuring registers, or asserting INTO-requires active VCC supply and host serial communication. The RF430CL330HCPWR is not a standalone NFC tag; it is a transponder designed for host-assisted operation.