NXP Semiconductors PN7462AUHN/C300Y

Overview

PN7462AUHN from NXP Semiconductors is a 32-bit Arm Cortex-M0 NFC microcontroller with integrated contact (ISO/IEC 7816 UART) and contactless (13.56 MHz NFC Forum-compliant) interfaces, 160 kB Flash, 12 kB SRAM, and HVQFN64 package. It delivers EMV-compliant RF performance up to 848 kbit/s and supports dual-interface smart card readers in physical access control and payment terminals.

For engineers reviewing the PN7462AUHN datasheet, PN7462AUHN pinout, PN7462AUHN application, or PN7462AUHN equivalent, this page provides verified technical context, validated pin functions, confirmed dual-interface timing behavior, and real-world design constraints for secure NFC reader development.

Technical Context

The PN7462AUHN integrates a dedicated high-power NFC frontend with Adaptive Wave Control (AWC) and Dynamic Power Control (DPC), enabling EMV-level contactless communication without external active components. Its contact interface supports Class A/B/C cards at 1.8 V/3 V/5 V with thermal protection, short-circuit detection, and ISO/IEC 7816-3&4 UART compliance.

It features dual host interfaces - USB 2.0 full-speed and HSUART up to 1.288 Mbit/s - alongside two master interfaces (SPI and Fast-mode Plus I²C), four general-purpose timers, CRC coprocessor, and random number generator. The 20 MHz Cortex-M0 core operates within -40 °C to +85 °C ambient range using internal HFO/LFO clocks and a 27.12 MHz crystal oscillator.

Key Specifications

Pinout & Package

HVQFN64 package (SOT804-4), 9 × 9 × 0.85 mm body, thermally enhanced with exposed die pad connected to GND. Pin 1 index area marked on top view; inner leads internally connected to GND - PCB layout must avoid conductive traces under package footprint.

Key Features

Applications

Equivalent & Alternatives

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

Compared with PN7462AUEV and PN7362AUHN, the PN7462AUHN uniquely combines HVQFN64 packaging with full dual-interface capability - enabling drop-in replacement only in designs requiring both contact and contactless functionality without sacrificing thermal performance or debug accessibility.

Availability

PN7462AUHN is available at Aetrix Electronics and suitable for physical access control systems, EMVCo-compliant payment terminals, and USB NFC reader dongles requiring stable component supply across industrial temperature ranges and long production lifecycles.

Supply support for PN7462AUHN 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

NXP Semiconductors is a global semiconductor leader specializing in secure connectivity solutions for automotive, industrial, and IoT applications, with deep expertise in NFC, RFID, and secure microcontrollers.

The PN7462 family was designed specifically for high-integration dual-interface NFC readers - combining contact smart card control, EMV-compliant contactless communication, and real-time microcontroller processing in a single die to reduce system complexity and certification effort.

FAQ

What is the maximum RF data rate supported by PN7462AUHN in contactless mode?

The PN7462AUHN supports a maximum contactless data rate of 848 kbit/s in high-speed NFC modes. This is achieved through its integrated high-power NFC frontend with Adaptive Wave Control and Dynamic Power Control, enabling EMV-compliant transactions without external RF components. The PN7462AUHN maintains this rate across ISO/IEC 14443A/B, NFC Forum Types 1–5, and P2P active/passive modes under specified supply and temperature conditions.

Does PN7462AUHN support all three ISO/IEC 7816 voltage classes (A, B, C) simultaneously?

Yes, the PN7462AUHN supports Class A (5 V), Class B (3 V), and Class C (1.8 V) smart cards simultaneously via its integrated ISO/IEC 7816-3&4 UART interface. Voltage selection is handled automatically by the internal DC-to-DC converter, which starts at 3 V for Class A and 2.7 V for Class B. The PN7462AUHN also provides hardware-level current limiting, short-circuit detection, and thermal protection for each card contact.

Can PN7462AUHN operate in hard power-down mode while retaining contactless field detection capability?

Yes, the PN7462AUHN can wake from hard power-down mode (≤18 µA) upon detection of an RF field at the ANT1/ANT2 pins. This feature enables ultra-low-power standby in battery-operated readers, where the device remains inert until a card or phone enters the field - then rapidly powers up the NFC frontend and Cortex-M0 core to complete the transaction. Wake-up time is typically under 200 µs.

What debug interface does PN7462AUHN provide, and is it accessible during NFC operation?

The PN7462AUHN provides Serial Wire Debug (SWD) via SWDIO and SWDCLK pins, fully compatible with standard ARM debug probes. Debug access is non-intrusive and can be used concurrently with NFC and contact interface operation - allowing real-time firmware inspection, breakpoint setting, and memory read/write without halting RF or card communication. No additional debug pins or modes are required.

Is the PN7462AUHN pin-compatible with other members of the PN7462 family, such as PN7462AUEV?

No, the PN7462AUHN (HVQFN64) is not pin-compatible with PN7462AUEV (VFBGA64), despite identical electrical functionality and memory configuration. Their pinouts differ significantly - e.g., contact interface signals (SCVDD, SAM, SAP, CLK, RST) exist only on PN7462AUHN, and ball/pad assignments for USB, SPI, and I²C are rearranged. PCB layout and schematic must be redesigned for package substitution.