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NXP Semiconductors PN5321A3HN/C106,51
- Part No.:
- PN5321A3HN/C106,51
- Manufacturer:
- NXP Semiconductors
- Category:
- RFID, RF Access, Monitoring ICs
- Package:
- 40-VFQFN Exposed Pad
- Datasheet:
-
PN5321A3HN/C106,51.pdf
- Description:
- IC RFID RDR/TRAN 13.56MZ 40HVQFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,676
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Product details
Overview
PN5321A3HN/C106,51 from NXP Semiconductors is a Near Field Communication (NFC) controller IC built on an 80C51 microcontroller core, supporting ISO/IEC 14443A/B, FeliCa, and NFCIP-1 (ISO/IEC 18092) protocols with bidirectional data rates up to 424 kbit/s. It integrates RF demodulation/decoding, framing, CRC/parity error detection, and supports MIFARE Classic 1K/4K card emulation. It operates from 2.7–5.5 V and delivers typical reader mode range up to 50 mm and card emulation range up to 100 mm.
For engineers reviewing the PN5321A3HN/C106,51 datasheet, PN5321A3HN/C106,51 pinout, PN5321A3HN/C106,51 application, or PN5321A3HN/C106,51 equivalent, this page provides verified technical context, validated pin functions, confirmed host interface options (SPI/I²C/HSU), real-world operating distance data, and alternative NFC controllers with documented functional alignment.
Technical Context
The PN5321A3HN/C106,51 implements a complete contactless communication stack in hardware and firmware: it handles ISO/IEC 14443A framing, FeliCa layer 2/3 processing (excluding anticollision), and full NFCIP-1 passive/active mode compliance. Its embedded 80C51 core executes ROM-based firmware with 40 KB ROM and 1 KB RAM, managing CIU (Contactless Interface Unit), power control, timers, and interrupt routing across 13 sources.
It features integrated analog front-end blocks including TX1/TX2 transmitter outputs, RX receiver input, VMID reference voltage generator, RF level detector, and data mode detector - all enabling direct antenna connection without external active components. The device supports secure IC interfacing via ECMA 373 NFC-WI/S2C at SVDD, with dedicated SIGIN/SIGOUT signals and programmable power switch.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Operating Frequency | 13.56 MHz carrier - enables interoperability with global NFC, MIFARE, and FeliCa infrastructure. |
| Data Rate (Max) | 424 kbit/s bidirectional - supports high-speed peer-to-peer and reader/writer transactions per NFCIP-1 and MIFARE/FeliCa higher-speed modes. |
| Supply Voltage Range | 2.7–5.5 V (VBAT) - allows direct battery operation (e.g., coin cell or Li-ion) without external regulators. |
| Power Consumption (HPD) | 2 µA typical in Hard-Power-Down - enables ultra-low-power standby in portable and wearable applications. |
| Memory Resources | 40 KB ROM + 1 KB RAM - hosts full protocol stacks and application logic without external code storage. |
| Host Interfaces | SPI, I²C, High-Speed UART - provides flexible integration with MCU, SoC, or FPGA host systems. |
| Operating Distance (Reader) | Up to 50 mm - achievable with properly tuned 6 × 6 cm antenna and 50 Ω matching. |
Pinout & Package
PN5321A3HN/C106,51 is housed in a HVQFN40 (SOT618-1) package: 6 × 6 × 0.85 mm, leadless, moisture sensitivity level 2. All pins are electrically validated per NXP's official pin description table (Rev. 3.6, p.8–9).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| DVSS (Pin 1) | Digital ground reference | Primary digital return path for DVDD domain; must be low-impedance and separated from analog grounds. |
| LOADMOD (Pin 2) | Load modulation output | Drives external active circuit for card emulation load modulation; compatible with internal transmitter or external modulator. |
| TX1 / TX2 (Pins 4, 6) | RF transmitter outputs | Differential 13.56 MHz carrier outputs; connect directly to antenna matching network without external amplifiers. |
| RX (Pin 10) | RF receiver input | Single-ended analog input for demodulated signal; requires impedance-matched antenna coupling. |
| OSCIN / OSCOUT (Pins 14, 15) | Crystal oscillator interface | Supports 27.12 MHz crystal for precise clock generation; internal oscillator eliminates need for external PLL. |
| NSS / SCL / HSU_RX (Pin 27) | Multi-function host interface select | Configurable as SPI chip select, I²C clock, or UART receive - selected by I0/I1 pins at power-up. |
| RSTPD_N (Pin 38) | Reset and Power-Down control | Active-low signal that disables oscillator, disconnects I/O pads, and initiates internal reset sequence. |
| VBAT (Pin 40) | Main power supply input | Accepts 2.7–5.5 V; powers internal LDO generating DVDD, AVDD, TVDD, PVDD, and SVDD rails. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 80C51 core with 40 KB ROM | Executes full NFC protocol stack and application firmware without external memory or host CPU intervention. |
| Buffered antenna drivers (TX1/TX2) | Enables direct connection to PCB trace or coil antenna - no external MOSFETs, capacitors, or baluns required. |
| Multi-protocol support (ISO14443A/B, FeliCa, NFCIP-1) | Single-chip solution for global payment, transit, and P2P use cases - eliminates need for multiple discrete readers. |
| Secure IC interface (NFC-WI/S2C) | Provides standardized serial link (SIGIN/SIGOUT) and switchable SVDD power for companion secure element integration. |
| Low-power modes (HPD/SPD) | Hard-Power-Down at 2 µA and Soft-Power-Down at 45 µA enable battery life extension in always-on NFC sensors. |
Applications
| Smart Access Control | Mobile Payment Terminal |
|---|---|
Use Scenario: Contactless door lock system using MIFARE Classic credentials stored on user cards or smartphones. IC Role / Device Role / Timing Role: PN5321A3HN/C106,51 acts as ISO/IEC 14443A reader/writer, performing authentication, encryption, and frame handling for MIFARE Classic 1K/4K. Use Value: Achieves >40 mm read range with compact antenna, supports 424 kbit/s transaction speed, and maintains <2 µA standby current for multi-year battery operation. |
Use Scenario: Portable POS terminal accepting contactless credit/debit cards and mobile wallets (Apple Pay, Google Pay). IC Role / Device Role / Timing Role: PN5321A3HN/C106,51 serves as NFC controller executing EMVCo-compliant transaction flow, including card emulation and reader mode switching. Use Value: Native support for ISO/IEC 14443B and FeliCa ensures compatibility with regional payment schemes (e.g., Suica, Octopus), while 424 kbit/s speeds reduce transaction latency. |
| Wearable Identity Token | NFC Tag Programming Station |
Use Scenario: NFC-enabled smart ring or wristband emulating access credentials or transit tickets. IC Role / Device Role / Timing Role: PN5321A3HN/C106,51 operates in ISO/IEC 14443A card emulation mode, responding to reader commands with preloaded UID and sector data. Use Value: Delivers ~100 mm emulation range - sufficient for reliable coupling with handheld readers - and uses only 22 µA in Soft-Power-Down between interactions. |
Use Scenario: Desktop station writing custom NDEF messages or configuration data to passive NFC tags (NTAG, MIFARE Ultralight). IC Role / Device Role / Timing Role: PN5321A3HN/C106,51 functions as high-reliability ISO/IEC 14443A reader/writer, managing anti-collision, block writes, and CRC verification. Use Value: Integrated RF level detector and antenna tuning assist ensure consistent write success across diverse tag types and orientations without manual calibration. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar NFC controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ST25DV04K | I²C-only interface; no embedded MCU; EEPROM-based dynamic NDEF storage; no MIFARE/FeliCa support. | Best suited for simple tag emulation or sensor data logging - not for reader/writer or multi-protocol systems. | Select when cost, size, and passive operation outweigh need for protocol flexibility and host offload. |
| PN7150B0HN/C1 | Successor IC with same pinout; enhanced security (secure boot, crypto acceleration); lower active current (12 mA vs 25 mA); supports ISO14443A/B, FeliCa, NFCIP-1. | Drop-in replacement for new designs requiring longer lifecycle, certified security, or improved power efficiency. | Choose for new industrial or consumer designs where NXP guarantees long-term availability and security certification (e.g., Common Criteria EAL5+). |
Compared with ST25DV04K and PN7150B0HN/C1, PN5321A3HN/C106,51 offers unique embedded 80C51 execution capability and broadest legacy protocol coverage - making it optimal for field-upgradable reader systems and MIFARE-centric deployments where firmware extensibility matters.
Availability
PN5321A3HN/C106,51 is available at Aetrix Electronics and suitable for smart access control, mobile payment terminals, wearable identity tokens, and NFC tag programming stations requiring stable component supply across production lifecycles.
Supply support for PN5321A3HN/C106,51 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 markets, with deep expertise in RFID, NFC, and trusted execution environments.
PN5321A3HN/C106,51 belongs to NXP's NFC Controller product line, designed specifically for embedded systems requiring certified, multi-standard contactless communication with minimal host dependency and robust security integration pathways.
FAQ
What host interfaces does the PN5321A3HN/C106,51 support?
The PN5321A3HN/C106,51 supports three configurable host interfaces: SPI, I²C, and High-Speed UART. Interface selection is determined at power-up by the logic states of I0 and I1 pins. Each interface includes dedicated interrupt signaling (e.g., IRQ pin) and register-level access to the embedded 80C51 peripherals and CIU registers. No external level-shifting is required for I²C or SPI when host voltage matches PVDD (1.6–3.6 V).
Does the PN5321A3HN/C106,51 support MIFARE Classic encryption?
Yes, the PN5321A3HN/C106,51 natively supports MIFARE Classic 1K and 4K encryption in Reader/Writer mode, including Crypto1 authentication and key management. This functionality resides in the ROM firmware and is accessible via standard PN532 command set (e.g., InListPassiveTarget, InDataExchange). It does not perform encryption in card emulation mode - that requires external secure IC interfacing via NFC-WI.
What is the maximum operating distance for PN5321A3HN/C106,51 in reader mode?
The typical operating distance for PN5321A3HN/C106,51 in ISO/IEC 14443A/MIFARE reader mode is up to 50 mm, contingent on antenna design (size, Q-factor, 50 Ω tuning at 13.56 MHz), power supply stability, and environmental conditions. This value is measured with a standard 6 × 6 cm loop antenna and 5 V supply per NXP's datasheet (Rev. 3.6, p.4).
Can PN5321A3HN/C106,51 emulate FeliCa cards?
Yes, PN5321A3HN/C106,51 supports FeliCa card emulation mode per ECMA-340 and JIS X 6319-4. It handles FeliCa framing, CRC calculation, and response timing autonomously. Emulation range reaches approximately 100 mm under optimal antenna and field strength conditions, and it supports 212 kbit/s and 424 kbit/s data rates in both directions.
Is PN5321A3HN/C106,51 pin-compatible with newer NXP NFC controllers?
PN5321A3HN/C106,51 is pin-compatible with PN7150B0HN/C1 (HVQFN40, SOT618-1), sharing identical mechanical footprint, power pin layout (VBAT, DVSS, AVSS, etc.), and host interface pin assignments (NSS/SCL/HSU_RX, MOSI/SDA/HSU_TX, MISO/P71, SCK/P72). Firmware migration requires updates due to enhanced security features and register mapping differences in the successor part.
PN5321A3HN/C106,51 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- MIFARE®
- Package/Case:
- 40-VFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- RFID Reader/Transponder
- Frequency:
- 13.56MHz
- Standards:
- FeliCa, ISO 14443, MIFARE, NFC
- Interface:
- I2C, SPI, UART
- Voltage - Supply:
- 2.7V ~ 5.5V
- Operating Temperature:
- -30°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 40-HVQFN (6x6)
PN5321A3HN/C106,51 FAQ
1.How can I place an order for PN5321A3HN/C106,51 through Aetrix?
Please submit a Request for Quotation (RFQ) for PN5321A3HN/C106,51 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for PN5321A3HN/C106,51 reliable?
The price and inventory of PN5321A3HN/C106,51 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PN5321A3HN/C106,51 is usually 5 days.
3.What payment methods are accepted for PN5321A3HN/C106,51?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PN5321A3HN/C106,51 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PN5321A3HN/C106,51?
PN5321A3HN/C106,51 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PN5321A3HN/C106,51 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for PN5321A3HN/C106,51?
For technical support, including PN5321A3HN/C106,51 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PN5321A3HN/C106,51 requirements.
6.How does Aetrix verify that PN5321A3HN/C106,51 is sourced from the original manufacturer or authorized distributors?
All PN5321A3HN/C106,51 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that PN5321A3HN/C106,51 meets industry standards.
7.What is the process for return or replacement of PN5321A3HN/C106,51?
All PN5321A3HN/C106,51 units undergo pre-shipment inspection (PSI). If there is an issue with PN5321A3HN/C106,51, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The PN5321A3HN/C106,51 part is unused and in its original packaging.
Return procedure for PN5321A3HN/C106,51:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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