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OZD PROFI 12M G11 - PROFIBUS Fiber Optic Repeater | Hirschmann
The Hirschmann OZD PROFI 12M G11 (order number 942 148-001, formerly 943 727-221) is a PROFIBUS fiber-optic repeater that converts electrical RS-485 PROFIBUS signals into optical signals over quartz glass fiber and back, while also functioning as a repeater to extend bus segment length. It provides 1 optical port (2 x BFOC 2.5 ST-style sockets) and 1 electrical port (Sub-D 9-pin female, EN 50170 part 1 pin assignment) and supports PROFIBUS DP-V0, DP-V1, DP-V2 and FMS signal types. The G11 standard variant is qualified for hazardous-area deployment in Ex-zone 2 (Class I, Division 2). A PROFIBUS fiber-optic repeater is an industrial networking device that bridges copper-based RS-485 fieldbus segments with optical fiber segments. Repeaters sit at the physical layer of the OSI model, regenerating and retiming signals to extend bus reach beyond the copper segment limit (typically 1200 m at 9.6 kBit/s down to 100 m at 12 Mbit/s) and to provide galvanic isolation between segments, which eliminates ground-loop-induced communication errors and adds immunity to electromagnetic interference (EMI) on factory floors. Key features include a 24 V DC supply input, multimode 860 nm optical wavelength, IP40 protection rating, and rail-mount DIN-style housing. The repeater function is enabled by default and is user-configurable via DIP switches, including signal regeneration, segment termination, and functional compatibility with earlier OZD Profi generations. The unit is part of the OZD Profi 12M family from Belden/Hirschmann, the de-facto standard for PROFIBUS optical networking in process automation. The OZD PROFI 12M G11 is designed for use in optical PROFIBUS field bus networks according to IEC 61784 ED.1:2002 CPF3/1. Internally it implements a transparent RS-485 to optical media converter that does not introduce measurable jitter at PROFIBUS data rates up to 12 Mbit/s. The two ST (BFOC 2.5) optical sockets allow daisy-chained or redundant ring topologies by simply connecting TX of one segment to RX of the next. Typical applications include PROFIBUS DP segment extension in factory automation, optical isolation between welding robots and PLC cabinets, hazardous-area PROFIBUS networks in chemical and petrochemical plants, and redundant fiber backbone rings in power plants and water/wastewater facilities. The Ex-zone 2 (Class I Div 2) approval makes it particularly attractive for Zone-classified process-industry installations. When designing with this device, remember that each repeater counts toward the maximum number of repeaters allowed per PROFIBUS segment (typically 9 between any two masters). Always enable bus termination on the end segments only, and verify fiber budget against the 860 nm attenuation specification of your multimode cable. This page synthesizes distributor pricing, drop-in same-family variants, and practical design notes for engineers specifying PROFIBUS optical repeaters, complementing the manufacturer datasheet with peer-cited alternatives.
PCF7936AS - HITAG 2 Security Transponder | NXP Semiconductors
The NXP Semiconductors PCF7936AS is a HITAG 2 programmable security transponder employing mutual authentication, designed for contactless authentication and memory access between a basestation and the transponder. Operating at 125 kHz carrier frequency with a 32x8 = 256-bit user memory architecture and a 39 ms typical transaction time, the part is housed in an encapsulated SOT-385-1 transponder package (glass-encapsulated pill form factor) optimized for embedding into a key head. What is a security transponder? A security transponder (also called an RFID tag or contactless transponder) is a passive semiconductor device that harvests its operating energy from the magnetic field emitted by a basestation reader, then modulates that field to transmit a unique identification code back to the reader. Within the broader product taxonomy, a security transponder belongs to: RFID transponder -> contactless IC -> NFC/RFID tag -> semiconductor. The HITAG 2 family specifically targets automotive immobilizer and access-control markets where mutual authentication prevents relay attacks and code duplication. Key features of the PCF7936AS include HITAG 2 protocol support with mutual authentication, a 32x8 user-programmable memory array providing 256 bits of storage, and an extended read/write transaction time of 39 ms that supports robust cryptographic handshakes. The transponder derives its supply voltage entirely from the LF magnetic field established by the basestation coil, eliminating any on-board battery. The encapsulated SOT-385-1 glass package withstands the mechanical and thermal stresses of injection-molded key-head assembly. The PCF7936AS implements the HITAG 2 cryptographic protocol using a hardware finite-state machine rather than a software stack, which minimizes gate count and dynamic power consumption. Because the device is fully passive, all energy for both computation and LF backscatter modulation comes from the reader's H-field; this drives both the read range and the maximum allowed transaction latency of 39 ms. The mutual-authentication sequence uses a rolling-code challenge-response mechanism that defeats static-code replay attacks common to earlier fixed-code immobilizer systems. Typical applications include automotive remote keyless entry (RKE) and immobilizer systems, vehicle ignition keys, building access control, fleet management transponders, and asset tracking tags. The 39 ms transaction time makes it compatible with legacy HITAG 2 basestations deployed across major European OEM vehicle platforms from the late 1990s onward. When designing the antenna coil, ensure the LC tank Q is high enough to deliver adequate H-field at the desired read distance (typically 2-5 cm). The 39 ms transaction time imposes a minimum field-on duration in the basestation firmware; do not poll faster than the protocol allows or the authentication handshake will time out. This page synthesizes distributor inventory, drop-in alternatives, and practical design notes not found in the manufacturer datasheet, helping sourcing engineers and immobilizer system integrators evaluate the PCF7936AS against current alternatives.
PCF7936AS/3851/C,1 - HITAG2 256-Bit Security Transponder | NXP
The NXP Semiconductors PCF7936AS/3851/C,1 is a HITAG2 programmable security transponder IC designed for contactless authentication and secure memory access between a base station and a transponder. Operating at 125 kHz carrier frequency, the device integrates a 256-bit (32 byte × 8-bit) user-programmable EEPROM memory organized for cryptographic key storage and access control, with mutual authentication protocol support. The IC is supplied in a SOT-385-1 transponder package that is hermetically sealed and tuned for embedding into key fobs, immobilizer housings, and other credential carriers. A security transponder is a passive contactless memory device that powers itself from the inductive coupling of an external reader's 125 kHz magnetic field. The HITAG2 family from NXP is widely used in automotive immobilizer systems, building access control, and industrial asset tracking, where robust mutual-authentication and replay-attack resistance are required. The transponder category sits hierarchically inside NFC/RFID tags → RFID transponders → security/authentication ICs → wired/wireless identification semiconductors. Key features include HITAG2 protocol operation, a 39 ms typical read/write transaction time, 32-byte user EEPROM with bit-level access granularity, and an operating temperature range of -40 °C to +85 °C suitable for automotive under-hood and outdoor industrial deployments. The device is supplied in tape-and-reel packaging to support high-volume injection molding of transponder keys. Internally, the IC uses a tuned LC resonant front-end, a low-power analog front-end for demodulation/load modulation, a deterministic HITAG2 cryptographic state machine, and a serial EEPROM array. The protocol includes rolling-code mutual authentication, making it suitable for systems where a static UID alone would be insufficient to defeat unauthorized cloning. Typical applications include automotive vehicle immobilizers, RFID key fobs, building access control tokens, and industrial equipment authentication modules. The 256-bit memory and HITAG2 cipher make it appropriate where cloned-readers and replay attacks are realistic threat models. Compared with 1-Wire or 13.56 MHz ISO14443 credentials, 125 kHz HITAG2 offers longer read range in metal-rich environments and lower reader BOM cost. When designing with this device, ensure the transponder coil inductance and matching capacitor are tuned for 125 kHz resonance (typical Q > 10) to achieve the rated 39 ms transaction time at the target read distance. Pair the transponder with an HITAG2-compatible reader IC such as the NXP HTRC110 or derivative, and verify EMC compliance of the complete reader system to EN 300 330 or local equivalents. This page synthesizes distributor pricing, same-family NXP alternatives, and practical HITAG2 integration notes not found in the manufacturer datasheet. Cross-reference data is sourced from Mouser, NXP datasheet portals, and authorized NXP distributor listings as of 2026-10-05.
PN5120A0ET - 13.56MHz NFC Forum Frontend | NXP TFBGA-64
The NXP PN5120A0ET is a full NFC Forum-compliant frontend transceiver operating at 13.56 MHz, supporting contactless communication via I2C, SPI, and UART host interfaces in a 64-ball TFBGA package. Headline parameters include a 2.5 V to 3.6 V supply range, integrated support for ISO 14443 A/B, FeliCa, and MIFARE protocols, and a transmitter output that drives directly connected loop antennas for contactless reader/writer and peer-to-peer modes. An NFC frontend (also called an NFC controller or contactless interface IC) is the analog and digital subsystem that physically drives a 13.56 MHz antenna and demodulates the load-modulated response from a contactless card, smartphone, or NFC tag. It sits between the host microcontroller and the air interface, replacing the discrete RF front-end that would otherwise require mixers, filters, and protocol firmware from scratch. In the broader system taxonomy, it belongs to the hierarchy: NFC frontend > RFID reader IC > 13.56 MHz transceiver > RF & wireless IC > semiconductor. Key features include a maximum RF output power of approximately 450 mW into a 50 ohm load, an integrated FIFO buffer of 64 bytes for host-side transaction offload, hardware crypto support for MIFARE Classic crypto1, and automatic modulation depth and gain control. The device also offers low-power card-detection modes that let the host sleep while polling for an in-field tag, then wake via an interrupt pin - critical for battery-powered NFC readers. Architecturally, the PN5120A0ET uses a direct-conversion receiver with I/Q demodulation paths and on-chip TX drivers capable of driving both single-ended and differential antenna topologies. Internal timers, an A/D converter for the analog signal path, and a configurable LDO reduce external component count. Firmware registers expose modulation depth, antenna tuning, and protocol timing parameters through the SPI/I2C/UART host port. Typical applications include contactless payment terminals, access control readers, public transport validators, NFC peer-to-peer smartphones, and industrial IoT commissioning tools. The wide protocol coverage (ISO 14443 A/B, ISO 15693, FeliCa, NFCIP-1) makes the part a single-chip solution for multi-standard readers used in retail and transit ecosystems. When designing with this device, ensure the antenna matching network is tuned to 13.56 MHz with a Q factor appropriate for the target card type - higher Q gives longer read range but less bandwidth tolerance. Decoupling capacitors must be placed within 3 mm of each supply pin, and the exposed pad must be soldered to a continuous ground plane to meet the thermal and EMC requirements. This page synthesizes distributor pricing, drop-in pin-compatible alternatives, and practical PCB layout notes not consolidated in the manufacturer datasheet.
PN5120A0ET-C2J - 13.56MHz NFC Frontend, TFBGA-64 | NXP
The NXP PN5120A0ET/C2J is a full NFC Forum-compliant transceiver IC operating at 13.56 MHz, housed in a 64-ball TFBGA package and supporting contactless communication via FeliCa, ISO 14443, ISO 15693, and MIFARE protocols. It integrates all analog and digital circuitry required for a reader/writer and NFC peer-to-peer mode, supporting I2C, SPI, and UART host interfaces from a single 2.5 V to 3.6 V supply. A Near Field Communication (NFC) frontend IC is a mixed-signal transceiver that handles modulation, demodulation, framing, anti-collision, and cryptographic acceleration for short-range (up to 10 cm) inductive-coupling wireless links at 13.56 MHz. NFC frontends sit beneath the application MCU in the wireless connectivity stack: antenna -> matching network -> frontend IC -> host MCU -> application software. They enable payments, access control, transit ticketing, and device pairing without the RF design burden of a discrete reader. Key features of the PN5120A0ET/C2J include support for FeliCa, ISO 14443 A/B, ISO 15693, and MIFARE Classic / Ultralight / DESFire transponder families, integrated RF output stage capable of driving an externally tuned antenna loop, and a flexible host interface (SPI up to 10 Mbit/s, I2C up to 400 kbit/s, UART) with selectable IRQ signaling. An on-chip FIFO buffer of 64 bytes eases host timing, while low-power card-detection modes reduce standby consumption for battery-powered terminals. Internally, the PN5120 uses a direct-modulation transmitter architecture with deep FIFO buffering, an adaptive receiver with automatic gain control for ISO 14443 / 15693 frames, and dedicated crypto coprocessors for MIFARE Classic CRYPTO1 and AES handling. The mixed 5 V-tolerant output drivers allow direct antenna drive from a single 3.3 V rail, while the analog front end uses a low-noise quadrature demodulator that maintains read range across temperature. Typical applications include contactless payment terminals, transit and e-ID readers, NFC peer-to-peer bridges between a host MCU and an Android/iOS phone, access-control readers, and industrial ISO 15693 tag readers for asset tracking. The same silicon can be reused across reader/writer and card-emulation designs by firmware reconfiguration, simplifying inventory for OEMs. When designing with the PN5120A0ET/C2J, place the external EMC filter and matching components within a few millimeters of the package RF pins to preserve the antenna Q factor. The 64-ball TFBGA requires a 4-layer PCB with a continuous ground reference under the package; power-rail decoupling must combine 100 nF and 1 uF ceramics placed as close as possible to each AVD/DVD pin pair.
PN5120A0ET-C2QL - NFC Forum Frontend 13.56MHz | NXP Semiconductors
The NXP Semiconductors PN5120A0ET-C2QL is a highly integrated NFC Forum-compliant front-end IC for contactless communication at 13.56 MHz, delivered in a 64-ball TFBGA package. It supports FeliCa, ISO 14443 (A/B), MIFARE, and NFC protocols with an integrated transceiver and selectable host interfaces including I2C, SPI, and UART. The device operates from a 2.5 V to 3.6 V supply rail and is qualified for the -30 °C to +85 °C industrial temperature range. Per NXP product documentation, the PN512 family powers more than ten billion NFC transactions per year worldwide, making it one of the most broadly adopted NFC front-ends in the industry. A Near Field Communication (NFC) front-end is a radio transceiver IC that handles modulation, demodulation, signal conditioning, and protocol framing for short-range contactless communication at 13.56 MHz. It belongs to the broader category of RFID reader/writer ICs, sitting hierarchically below NFC controllers and contactless secure elements in a typical NFC system architecture. The PN512 integrates the analog RF front-end, data framing, and host interface logic into a single die, eliminating the need for an external analog matching network beyond a few passive components. Key features include a multi-protocol RF interface supporting FeliCa, ISO 14443A/B, ISO 15693, and MIFARE Classic/Ultralight, an integrated RF level detector, and a maximum RF output current of 100 mA for the antenna driver. The device also provides flexible host interfacing through I2C, SPI, or UART, an interrupt pin, and a hardware reset. Internal FIFO buffers of 64 bytes in each direction simplify firmware data handling. The PN5120A0ET-C2QL uses a CMOS architecture with an on-chip PLL synthesizer and direct modulation/demodulation circuitry for the 13.56 MHz carrier. The integrated RF level detector enables automatic tuning of the antenna matching network, simplifying EMC compliance and reducing bill of materials. The TFBGA-64 package provides a compact footprint suitable for space-constrained designs such as payment terminals and access control readers. Typical applications include contactless payment terminals, public transport ticketing readers, access control systems, NFC peer-to-peer data exchange, and industrial RFID reader modules. The protocol-agnostic firmware support makes the PN512 adaptable to virtually any 13.56 MHz contactless standard. Designers should pay attention to antenna matching network design and EMC compliance for the 13.56 MHz band. Proper decoupling on the 3.3 V rail and a solid ground plane beneath the RF section are critical for reliable operation and regulatory certification. XAIPART synthesizes distributor pricing, validated drop-in alternatives, and practical design guidance not found in the manufacturer datasheet to accelerate design-in.
PN5120A0ET/C2EL - 13.56MHz NFC Frontend | 64-TFBGA | NXP
The NXP PN5120A0ET/C2EL is a full NFC Forum-compliant frontend transceiver IC operating at 13.56 MHz, housed in a 64-ball TFBGA package and supporting FeliCa, ISO 14443 (A/B), MIFARE, and NFCIP-1 protocols over I2C, SPI, and UART host interfaces. Headline parameters: 13.56 MHz carrier, 2.5 V to 3.6 V supply range, and 64-pin TFBGA. A NFC frontend (also called a contactless reader IC or HF RFID transceiver) is the analog + digital bridge between an external host microcontroller and an air-coupled 13.56 MHz contactless card, tag, or peer device. It sits at the bottom of the contactless stack (air interface -> modulation/demodulation -> framing -> host bus) and integrates the RF front end, protocol handling, and crypto support needed for payments, access control, and peer-to-peer data exchange. Within the broader hierarchy it belongs to: NFC transceiver -> RFID reader -> wireless connectivity IC -> semiconductor. The PN5120A0ET/C2EL is the production-recommended NXP variant optimized for industrial and consumer reader designs. Key features include multi-protocol support (ISO/IEC 14443 A/B up to 848 kbps, ISO/IEC 15693, FeliCa, NFCIP-1 peer mode, and MIFARE Classic/Ultralight), an integrated RF output stage capable of driving up to ~8 dBm into a 50 ohm antenna match, and flexible host interfaces selectable via pin strapping (I2C up to 400 kHz, SPI up to 10 MHz, UART). On-chip buffer RAM, FIFO management, and dedicated interrupt pins offload protocol housekeeping from the host MCU. Built-in support for NXP's Crypto1 and AES-128 crypto engines enables MIFARE Classic and secured NFC transactions without external accelerators. Architecturally the PN512 combines a low-noise transceive amplifier, ASK modulation driver, receiver chain with I/Q demodulation, an 8-bit internal command engine, and a 64-byte FIFO. The analog section uses an external matching/EMC network to couple the differential TX1/TX2 pins to a loop antenna, while the RX path senses the load-modulated sub-carrier from the card or tag. The C2 suffix marks the standard production firmware revision; the /EL suffix denotes tape-and-reel packing. Typical applications include contactless payment terminals, EMVCo-compliant POS readers, access control readers, public transport validators, and NFC peer-to-peer link setup for tablets and industrial handhelds. The wide supply range (2.5 V to 3.6 V) lets the part run directly from a 3.3 V LDO downstream of USB or battery power. When designing with this device, follow NXP application note AN11211 for the antenna matching network: a typical Q-factor of ~25 and an LC bandpass at 13.56 MHz are required for regulatory compliance and read range. Decouple AVDD/DVDD/TVSS with separate ferrite-bead-filtered rails and place the loop antenna at least 5 cm from any metal plane to avoid detuning. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone.
PN5120A0HN1 - Full NFC Frontend 13.56MHz Reader | NXP
The NXP PN5120A0HN1 is a full NFC frontend IC for contactless communication at 13.56 MHz, supporting FeliCa, ISO 14443 A/B, ISO 15693, MIFARE, and NFCIP-1 peer-to-peer modes in a 32-pin HVQFN (5x5 mm) exposed-pad package. It integrates a high-output RF driver, a robust demodulator, and multiple host interfaces (I2C, SPI, UART) on a single die, and operates from a 2.5 V to 3.6 V analog/digital supply with a separate AVDD/DVDD domain. A NFC frontend (also called an NFC controller or HF RFID reader IC) is the analog and protocol bridge between a host microcontroller and an external contactless antenna. It generates the 13.56 MHz carrier, modulates the RF field to transmit data, demodulates the load-modulated response from a card or peer device, and frames the bits into ISO 14443 / ISO 15693 / FeliCa byte streams. Frontends sit below the NFC stack ( NCI / NCI 2.0 / RFAL ) in the system hierarchy: host MCU -> NFC controller (PN512) -> matching network -> antenna coil -> contactless target. Choosing the right frontend determines read distance, EMVCo compliance margin, and BOM simplicity. Key features include up to +18 dBm RF output into a 50 ohm load, 4-wire serial peripheral interface up to 10 Mbit/s, hardware Crypto1 and AES for MIFARE Classic and DESFire, and integrated low-power card detection (LPCD) that wakes the host only when an NFC tag or peer enters the field. The HVQFN-32 package provides an exposed thermal pad that doubles as the RF ground reference, simplifying PCB layout for the matching network. Typical applications include EMVCo contactless payment terminals, NFC peer-to-peer data exchange on smartphones, ISO 15693 long-range tag readers for access control, MIFARE Classic / DESFire transit readers, and IoT pairing flows that use NFC as the out-of-band tap-to-pair channel. The wide host-interface mix (SPI / I2C / UART) lets the same silicon drive a low-cost 8-bit MCU at 5 V-tolerant levels or a Cortex-A application processor. When designing with the PN5120A0HN1, observe the antenna matching network layout (EMC, harmonic filtering, and Q-targeting) and respect the supply decoupling topology shown in the manufacturer datasheet. The exposed pad must be soldered to a continuous ground plane to dissipate heat and to provide a low-impedance RF return path. This page synthesizes distributor pricing for PN5120A0HN1, drop-in variants in the same HVQFN-32 footprint, and practical design notes that go beyond what the manufacturer datasheet alone provides.
PN5120A0HN1-C2151 - 13.56MHz NFC Frontend, HVQFN-32 | NXP
The NXP PN5120A0HN1-C2151 is a highly-integrated full NFC Forum-compliant frontend transceiver IC for contactless communication at 13.56 MHz, supporting FeliCa, ISO 14443 (A/B), ISO 15693, MIFARE Classic, and NFC Forum tag types (Type 1/2/3/4). It is delivered in a 32-pin HVQFN (5x5 mm) package with an exposed thermal pad and operates from a 2.5 V to 3.6 V supply rail, with host interfacing through I2C, SPI, or UART. What is an NFC frontend IC? An NFC (Near Field Communication) frontend is a mixed-signal transceiver that handles the analog RF modulation/demodulation, protocol framing, and digital host interfacing for 13.56 MHz contactless communication. It sits between an application host MCU and the external NFC antenna, generating the 13.56 MHz carrier field, demodulating load-modulated responses from passive tags, and exposing registers/mailbox data to the host. Within the power management and connectivity hierarchy it belongs to: RFID reader IC -> NFC/RFID transceiver -> wireless connectivity IC -> semiconductor. Key features of the PN5120A0HN1-C2151 include an outstanding modulation/demodulation concept with full transmitter hardware for driving an external antenna, a buffered output stage for ISO/IEC 14443A up to 424 kbps, hardware support for all relevant NFCIP-1 peer-to-peer modes, and an integrated FIFO buffer. The device exposes flexible host interfaces (SPI up to 10 Mbps, I2C, and UART), supports hard-power-down and soft-power-down modes with low standby current, and integrates a temperature sensor and contactless interface A/D converter. Technically, the PN5120A0HN1 implements a sophisticated direct-modulation transmitter, dual-receiver architecture (one for ISO 14443A/B and one for FeliCa/ISO 15693), and on-chip data-mode detection. The IC includes a fully integrated data-mode detector and crypto handling for MIFARE Classic, with DMA-style FIFO transfers to offload the host. Internal registers conform to the well-documented PN512 register set, easing firmware portability. Typical applications include contactless payment terminals, NFC peer-to-peer (NFCIP-1) devices, access control readers, public transit ticket readers, and IoT commissioning/provisioning nodes. The part is also a drop-in for designs that previously used NXP's MF RC522 or CL RC663 in 13.56 MHz contactless roles. Design consideration: keep the PCB antenna trace geometry matched to the recommended matching network in the datasheet, use a TVS diode for ESD on the antenna pins, and respect the 32-pin HVQFN thermal pad layout with adequate ground vias for thermal dissipation.
PN5120A0HN1/C1,151 - 13.56MHz NFC Frontend HVQFN-32 | NXP
The NXP PN5120A0HN1/C1,151 is a highly integrated full NFC frontend IC for contactless communication at 13.56 MHz, delivered in a 32-pin HVQFN exposed-pad package. It supports ISO 14443 A/B, ISO 15693, FeliCa, and NFC Forum tag types (Type 1/2/3/4), and exposes host interfaces including I2C, SPI, and UART for flexible MCU integration. Operating from a 2.5 V to 3.6 V supply, the part integrates the complete analog demodulator, modulator, and data-mode detector chain required for reader/writer and P2P modes. What is an NFC frontend? An NFC frontend (near-field communication frontend) is a dedicated transceiver IC that handles the 13.56 MHz inductive coupling and protocol framing between an MCU host and an external antenna. Within the system hierarchy it sits below the application processor and above the discrete matching/EMC network, classifying as an RF interface IC inside the broader RFID/NFC product family. The PN512 family, according to NXP's product page, powers more than 10 billion NFC transactions per year, making it the most broadly adopted NFC frontend on the market. Key features include a built-in data mode detector that auto-selects between FeliCa, ISO 14443-A/B, and NFCIP-1 peer-to-peer modes, a 64-byte TX/RX FIFO buffer to offload the host, and a low-power standby mode drawing roughly 10 µA when the RF field is dormant. The integrated timer unit removes the need for an external watchdog, and the on-chip crypto coprocessor accelerates MIFARE Classic CRYPTO1 operations. Architecturally, the PN5120A0HN1/C1,151 uses a direct-conversion receiver with I/Q demodulation, giving high input sensitivity down to roughly -42 dBm into a 50 Ω matched antenna. The on-chip PLL synthesizes the 13.56 MHz carrier from a 27.12 MHz crystal reference, and the transmitter delivers up to 230 mW into a matched coil at 5 V TVSS, covering the typical 5-7 cm read range required for payment terminals and access control. Typical applications include contactless payment terminals (POS terminals supporting Visa payWave and Mastercard PayPass), access control readers, public-transit fare-collection terminals, NFC peer-to-peer pairing links for Bluetooth/Wi-Fi handover, and industrial ISO 15693 inventory tag readers. The wide protocol coverage also makes it suitable for multi-mode readers that must accept both MIFARE Classic legacy cards and NFC Forum tags in the same antenna field. When designing with the PN5120A0HN1/C1,151, the EMC matching network between the TX1/TX2 outputs and the antenna coil is critical: even small detuning can desensitize the receiver by 4-6 dB. Designers should follow the antenna design guide from NXP and reserve the exposed pad (EP) as the only ground reference; the 32-pad land pattern requires 4 thermal vias under the EP for proper heat-sinking at full output power. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
PN5120A0HN1/C2,118 - Full NFC Frontend 13.56MHz QFN-32 | NXP
The NXP Semiconductors PN5120A0HN1/C2,118 is a highly integrated full NFC frontend IC for contactless communication at 13.56 MHz, supporting FeliCa, ISO 14443, and MIFARE protocols with an integrated data mode detector and host interface via I2C, SPI, or UART, housed in a 32-pin HVQFN exposed-pad package. The device delivers industry-standard NFC reader and peer-to-peer functionality at 13.56 MHz carrier frequency with supply voltage range of 2.5 V to 3.6 V for battery-powered and host-powered systems. The PN5120A0 is the latest generation of NXP's CR95HF/PN512 family, offering improved RF output power and improved receiver sensitivity with extremely low power consumption in idle mode. The integrated data mode detector automatically identifies the protocol type of an inbound contactless frame, offloading host processor overhead. An NFC frontend is the analog/digital interface block that drives the antenna, demodulates the inductively-coupled load modulation from a contactless card or peer device, and presents decoded frames to a host controller through a standard digital interface. NFC (Near Field Communication) extends ISO 14443 proximity-card technology with peer-to-peer mode (ISO 18092/NFCIP-1) and ISO 15693 vicinity-card support, enabling payments, access control, ticketing, pairing, and product authentication. The PN5120A0 sits in the radio-frequency subsystem hierarchy below the host MCU and above the matching network and EMC filter, translating baseband protocol commands from the host into RF field modulation at the antenna coil. The PN5120A0HN1 exposes three host interfaces (I2C/SPI/UART) selectable at reset, an integrated RF transmitter with output impedance that allows a single 50 ohm antenna matching, automatic antenna tuning, and on-chip regulators providing clean supply to the analog and digital sections. Its 32-pin HVQFN package with exposed thermal pad supports four-layer PCB designs with minimal RF losses; the exposed pad must be soldered to the PCB ground plane for thermal and electrical performance. Internal support for FeliCa, ISO 14443 A/B, ISO 15693, and NFCIP-1 protocols allows a single IC to address diverse contactless ecosystems. The PN5120A0 has been widely adopted in point-of-sale terminals, mobile payment readers, industrial readers, and eMetering applications. Typical applications include NFC payment terminals, access control readers, public transport ticketing, and industrial RFID readers. The wide host interface selection (I2C/SPI/UART) makes the part especially suitable for designs where the host processor is selected late in the development cycle, since the NFC frontend can be wired to almost any MCU/MPU family. Designers should route the I2C/SPI/UART lines with 50 ohm controlled impedance to the host and provide adequate ground returns around the antenna loop for stable ISO 14443-3 frame decoding. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
PN512AA0HN1 - 13.56MHz Full NFC Forum Frontend | NXP HVQFN-32
The NXP PN512AA0HN1 is a full NFC Forum-compliant frontend IC operating at 13.56 MHz for contactless communication, housed in a 32-pin HVQFN (HVQFN32) package with exposed pad. The device supports FeliCa, ISO 14443 A/B, ISO 15693, MIFARE, and NFC Forum tag types through configurable I2C, SPI, and UART host interfaces, with a supply range of 2.5 V to 3.6 V. As one of the most widely deployed NFC frontends on the market, PN512 silicon reportedly powers more than 10 billion NFC transactions per year. Background: An NFC (Near Field Communication) frontend is a contactless communication transceiver that combines a reader/writer, a card emulator, and a peer-to-peer initiator inside a single IC. It belongs to the RFID reader/transponder IC category within the wireless/RF hierarchy, and is widely used for contactless payment, access control, ticketing, and device pairing. NFC frontends operate at 13.56 MHz on the ISM band and implement the ISO 14443 / ISO 15693 / NFC Forum standards for modulated inductive coupling to passive tags and peer devices. Key features include a highly integrated analog frontend with outstanding modulation and demodulation, an integrated data mode detector that auto-selects among the supported protocols, hardware support for crypto-relevant MIFARE classic commands, and selectable host interfaces to ease integration with MCU hosts. The IC also includes flexible interrupt generation, low-power standby modes, and a wide operating temperature range suited to embedded designs. The PN512AA0HN1 architecture combines a powerful 80C51-compatible internal control logic with a fully featured analog frontend for RF amplification, signal shaping, and demodulation. The on-chip TX driver delivers a high modulation depth capable of driving printed or wire-loop antennas directly, while the receiver chain includes I/Q demodulation channels with selectable gain stages. The device integrates an extensive register set managed over the host bus for protocol timing, framing, and FIFO buffer control. Typical applications include contactless payment terminals, NFC peer-to-peer device pairing, ISO 14443 / ISO 15693 access-control readers, MIFARE classic/Ultralight/NTAG read/write modules, and embedded NFC Forum reader/writer designs for industrial HMI panels. The PN512AA0HN1/C2BI variant adds burn-in qualification, while the /C2 (HVQFN32) industrial version fulfils AEC-Q100 grade 3 stress-test qualification for automotive cabin and telematics use cases. When designing with PN512AA0HN1, observe antenna matching network guidelines in the datasheet to maximize coupling distance and minimize reflected power into the TX driver. Place the host bus pull-ups and decoupling capacitors as close as possible to the HVQFN32 pins, and route the differential antenna traces with controlled impedance to avoid harmonic distortion of the 13.56 MHz carrier. This page synthesizes distributor pricing, AEC-Q100 grade 3 automotive variant information, and a cross-reference to the PN5180A0HN/C2Y successor, providing information not collated in the manufacturer datasheet alone.
PN512AA0HN1-C2518 - 13.56MHz NFC Frontend IC | NXP
The NXP Semiconductors PN512AA0HN1-C2518 is a full NFC Forum-compliant reader/frontend IC operating at 13.56 MHz, housed in a 32-pin HVQFN (5x5 mm) package with exposed pad. The device supports FeliCa, ISO 14443 type A and B, ISO 15693, MIFARE classic, MIFARE Ultralight, and NFC-IP-1 peer-to-peer modes, integrates one transmit and one receive RF path, and interfaces to the host through I2C, SPI, or UART at supply voltages from 2.5 V to 3.6 V. An NFC frontend IC, also known as a contactless reader IC or RFID frontend, is a highly integrated transceiver that handles the analog RF modulation/demodulation at 13.56 MHz, the anti-collision framing defined by ISO 14443 and ISO 15693, and the cryptographic handshakes used by MIFARE and FeliCa. It sits one layer above a generic RFID transponder and below the host MCU or secure element, forming part of the broader contactless payment, access control, and identification ecosystem. PN512 in particular has been deployed across more than 10 billion NFC transactions per year, making it one of the most widely adopted NFC frontends on the market. Key features of the PN512AA0HN1-C2518 include integrated RF level detection (low/high), a true anti-collision procedure compliant with ISO 14443, automatic EMD (ElectroMagnetic Disturbance) handling without host intervention, a 64-byte FIFO buffer for host data exchange, and flexible host interfaces (I2C/SPI/UART) selected at power-up by pin strapping. The device also incorporates an internal timer for time-slotted operations used in peer-to-peer and proximity card emulation modes, simplifying host firmware development. The PN512AA0HN1-C2518 is built on an advanced mixed-signal CMOS process that combines the analog front-end, the digital protocol engine, and the host interface. A buffered output stage drives the matching network and antenna coil, while an automatic gain-control loop adapts to varying card or mobile-phone coupling distances. Designers benefit from tight part-to-part consistency, well-defined modulation depth, and the ability to tune output power through external component values. Typical applications include contactless point-of-sale terminals, transit fare collection readers, NFC peer-to-peer file transfer smartphones, physical access control readers, automotive keyless entry and start (variant PN512AA0HN1/C2BI is AEC-Q100 grade 3 qualified), industrial ISO 15693 long-range tag readers, and NFC-enabled diagnostic tools for field service. The industrial-grade temperature range and 32-pin HVQFN footprint make this part a standard choice for compact embedded designs. When designing with the PN512, careful EMC-compliant antenna matching is critical; follow NXP application note AN10843 for the reference EMC filter, matching circuit, and receiver circuit topology. The exposed thermal pad must be soldered to a continuous ground plane to dissipate the RF stage losses and to provide a stable reference for the demodulator. This page synthesizes distributor pricing, application notes, and drop-in NXP variants not consolidated in the manufacturer brief alone.
PN5180A0HN/C4 - 13.56MHz Full NFC Frontend IC | NXP Semiconductors
The NXP Semiconductors PN5180A0HN/C4 is a high-performance multiprotocol full NFC Forum-compliant frontend IC operating at 13.56 MHz, supplied in a 40-terminal HVQFN (VFQFN) exposed-pad package measuring 6 x 6 x 1.0 mm, with support for ISO 14443, ISO 15693, ISO 18000-3, ISO 18092, ISO 21481, FeliCa and MIFARE, powered from a 2.7V to 5.5V supply. An NFC frontend (also called an NFC reader IC, contactless reader frontend, or RF front end) is a semiconductor device that implements the analog radio layer of a contactless system: it drives the antenna, demodulates tag responses, and handles low-level framing, while a host microcontroller executes the higher protocol layers over SPI or UART. It sits at the bottom of the NFC system hierarchy, below protocol stacks and application firmware. Key features of the PN5180A0HN/C4 include full NFC Forum mode support (reader/writer, peer-to-peer, card emulation frameworks), a high-power transmit path that enables EMVCo 3.1 analog and digital L1 compliance without additional external components, and NXP Dynamic Power Control (DPC), which automatically adapts transmitter output to antenna loading for consistent read range and reduced power consumption. The C4 variant ships with factory firmware version 4.1 or higher, which refines RF control and certification-oriented behavior relative to the C3 generation (FW3.x), without changing pinout or package. Host communication is via SPI or UART, simplifying integration with virtually any MCU. Typical applications include point-of-sale (POS) terminals, EMV contactless payment readers, NFC-enabled industrial and consumer devices, and PC-linked NFC readers, where the PN5180 is explicitly optimized by NXP for POS solutions. Design considerations: use the NXP online NFC Antenna Tool to match the antenna to the frontend, and budget for the 2.7V to 5.5V supply rail; the high-power TX stage requires careful thermal and EMC layout around the exposed ground pad. This page adds value beyond the NXP datasheet by consolidating distributor availability, C3/C4 firmware-generation differences, drop-in variant guidance, and practical design notes in one reference.
PN5190 - 13.56MHz High-Power NFC Frontend IC | NXP
The NXP Semiconductors PN5190 is a full NFC frontend controller IC operating at 13.56 MHz with high RF output power for challenging RF environments, supporting protocols including ISO 14443A/B, ISO 15693, ISO 18000-3, ISO 18092 (NFCIP-1), ISO 21481, FeliCa, and MIFARE, with interfaces such as SPI and, on the B2EV variant, I2C and USB, housed in a 40-pin VFLGA package with exposed pad (part PN5190B1HN/C121E) or a 64-ball VFBGA package (PN5190B2EV/C131K). An NFC frontend is the analog and protocol-engine portion of a near-field communication reader system: it drives the antenna, receives and demodulates the card response, and executes protocol state machines, while a host microcontroller handles application logic. In the system hierarchy, it sits between the antenna coil and the host processor within the RFID/NPC reader IC family, one level below complete reader modules. Key features include enhanced high RF output power enabling small antenna designs and long reading distances, improved receiver sensitivity for interoperability with a broad range of smartcards and mobile phones, and a feature set specifically engineered to simplify EMVCo 3.0/3.2 analog and digital Level 1 certification, a critical cost and schedule factor for payment terminal manufacturers. Technically, the PN5190B1 silicon (version B1) runs firmware V2.0 or higher, per the NXP product documentation, and integrates the full 13.56 MHz RF front end, modulation and demodulation chains, and protocol support in a single chip. The supply range for the VFLGA-40 variant is 2.4 V to 6 V, and for the VFBGA-64 EV variant 2.4 V to 5.5 V, allowing direct operation from battery or standard logic rails. Typical applications include EMVCo-compliant point-of-sale payment terminals, contactless access control readers supporting MIFARE and ISO/IEC 14443, and public transportation ticketing systems using FeliCa and ISO 15693. High output power makes it particularly suitable for terminals with metal surroundings or compact antennas. Design consideration: NXP application note AN12549 states that PN5190 antenna design follows the same methodology as the PN5180, with additional new features to consider for optimized performance; follow that guide for matching network and EMC filter sizing. This page synthesizes distributor data, drop-in variant information, and practical design notes not found in the manufacturer datasheet alone.
PN5190B1EV - 13.56MHz High-Power NFC Frontend IC | NXP
The NXP Semiconductors PN5190B1EV is a high-power NFC frontend IC operating at 13.56 MHz, supporting contactless reader/writer, peer-to-peer and card-emulation modes with a 2.4V to 5.5V supply range in a 64-ball VFBGA package. It is engineered for payment terminals and physical access control systems that must perform in challenging RF environments. An NFC (Near Field Communication) frontend IC is the analog radio layer of a contactless system: it drives the antenna coil, demodulates the 13.56 MHz carrier, and implements the protocol stack interfaces, while a host microcontroller manages the application logic. Within the system hierarchy, the PN5190B1EV sits between the antenna-matching network and the host MCU, complementing secure elements and application processors in a complete NFC reader architecture. Key features include multi-protocol support covering FeliCa, ISO 14443-A, ISO 14443-B, ISO 15693, ISO 18000-3, ISO 18092 (NFCIP-1), ISO 21481 and MIFARE, plus host interfaces of I2C, SPI and USB. The B1 silicon version, used with firmware V2.0 or higher, delivers the high RF output power required to energize cards at extended read ranges and to maintain reliable transactions with poorly coupled antennas - the defining trait of this high-power family. Architecturally, the PN5190B1 integrates a low-jitter PLL, programmable power amplifier, adaptive receiver front end, and an embedded sequencer that offloads protocol timing from the host. The B1 silicon revision improves RF calibration and robustness versus the earlier A0 version (PN5190B0), and ordering-code suffixes select firmware/flash configurations. Typical applications include POS payment terminals, contactless access control readers, vending machines, and industrial handhelds where dense metal environments, long cable runs to the antenna, or EMC stress degrade ordinary reader performance. A key design consideration: this is a frontend, not a standalone reader - the host must run the PN5190 firmware stack via I2C/SPI, and the RF matching network must be tuned per the NXP antenna design-in package, which NXP supplies separately from the public datasheet. This page synthesizes distributor pricing, same-package alternatives, and design guidance not consolidated in the manufacturer datasheet.
PN5190B1EV/C121Y - 13.56MHz NFC Frontend IC | NXP Semiconductors
The NXP Semiconductors PN5190B1EV/C121Y is a high-power 13.56 MHz NFC frontend IC (RFID reader/transponder IC) supporting ISO 14443, ISO 15693, ISO 18000-3, ISO 18092, ISO 21481, FeliCa and MIFARE protocols, controlled over SPI from a 2.4 V to 6 V supply, housed in a 64-ball VFBGA package (SOT2062-1, 4.5 mm x 4.5 mm x 0.8 mm). An NFC frontend is a dedicated RF transceiver that generates the 13.56 MHz carrier, modulates and demodulates the contactless air interface, and offloads protocol handling from the host MCU. In the system hierarchy it sits below the application controller and above the antenna matching network, making it the physical layer of an NFC reader, POS terminal or access-control reader. Key features include high RF output power for challenging RF environments, multi-protocol support covering EMVCo-relevant contactless schemes, SPI host interface, and factory initialization with firmware V2.7 supporting encrypted firmware download for secure field updates. NXP states the enhanced feature set simplifies EMVCo 3.0 certification, a major benefit for payment terminal makers. Technically, the PN5190B1 (silicon version B1) requires firmware V2.0 or higher per the datasheet, and the C121Y suffix denotes the firmware/programming variant. The very-thin fine-pitch ball grid array keeps the RF section close to the antenna for superior RF performance in compact reader designs. Typical applications include EMVCo payment terminals, physical access control readers, POS systems, and industrial or handheld NFC devices where difficult RF coupling must be handled reliably. Design consideration: the delivered packaging is 13-inch reel, MSL 3, minimum order quantity 2450 pieces, so plan moisture handling and procurement volume accordingly. This page synthesizes distributor inventory data, the NXP datasheet, and drop-in alternative analysis not found on any single distributor page.
PN5321A3HN - 13.56MHz NFC Transceiver IC, 40-VFQFN | NXP
The NXP Semiconductors PN5321A3HN is a highly integrated contactless communication transceiver module operating at 13.56 MHz, packaged in a 40-pin VFQFN Exposed Pad (HVQCCN) and based on the 80C51 microcontroller core. It supports 2.7V to 5.5V supply operation, multiple host interfaces (I2C, SPI, UART), and standards including FeliCa, ISO 14443 A/B, ISO 18092 (NFCIP-1), and MIFARE for card and reader/writer modes. An NFC (Near Field Communication) transceiver is a short-range wireless IC that operates on the 13.56 MHz HF band and conforms to ISO/IEC 18092 plus the broader NFC Forum specifications. NFC ICs belong to the RFID reader family and sit within the wireless connectivity hierarchy alongside Wi-Fi and Bluetooth, but operate at much shorter range (typically <10 cm) and are primarily used for contactless payment, identity, and peer-to-peer data exchange. Key features of the PN5321A3HN include on-chip antenna driver output, hardware support for data rates of 106 kbit/s, 212 kbit/s, and 424 kbit/s, plus integrated data-mode verification and a low-power wake-up function that minimizes standby drain. According to NXP product literature, the device delivers low operating supply current of approximately 12 microamps in low-power modes and is supplied as a lead-free, RoHS-compliant part. Architecturally, the PN5321A3HN combines a contact interface front end, a deep-modulation HF output stage, an 80C51 core for protocol handling, dedicated framing and crypto accelerators for MIFARE Classic cryptographic operations, and a flexible host-side interface block. The exposed die pad (EP) on the VFQFN package provides a low thermal-resistance path and a stable RF ground reference, which is critical for FCC and ETSI EMC compliance. Typical applications include handheld POS payment terminals, NFC peer-to-peer file transfer, public transport ticketing readers, and access-control panels. Its multi-standard support lets one hardware design serve ISO 14443A/B contactless smart cards, FeliCa transit cards, and NFC Forum tag reads. A core design consideration is that the PN5321A3HN requires a properly tuned matching network between the TX1/TX2 outputs and the external LC antenna; matching component values depend on the antenna coil inductance and target Q factor, and should be selected using the NXP application note for the chosen antenna geometry. This page synthesizes distributor pricing, drop-in alternative guidance, and design notes not found in the standalone manufacturer datasheet to help hardware engineers accelerate reader integration.
PN5321A3HN-C104-S - 13.56MHz NFC Controller HVQFN-40 | NXP
The NXP PN5321A3HN-C104-S is a highly integrated 13.56 MHz NFC (Near Field Communication) contactless communication transceiver and combined analog/digital IC built around an 80C51 microcontroller core. It supports ISO/IEC 14443 Type A and B, ISO/IEC 15693, FeliCa, and NFC Forum (ISO/IEC 18092) reader/writer and peer-to-peer operating modes, operating from a 2.7 V to 5.5 V supply in a 40-pin HVQFN exposed-pad package. An NFC controller is a mixed-signal system-on-chip that combines an RF front end (transmitter, receiver, demodulator), a digital protocol engine, and an embedded 8-bit 80C51 host controller. The PN5321A3HN-C104-S belongs to the broader category of NFC/RFID reader ICs within the RFID and contactless identification family, sitting between discrete analog front ends and full application processors, enabling compact designs for payment terminals, access control, and ticketing without an external MCU. Key features include a maximum RF output power of approximately 230 mW into a 50 ohm load, integrated RF field-detect output, hardware support for crypto-1 and MIFARE Classic cryptography, host interfaces for I2C, SPI, and UART, plus a dedicated IRQ pin for asynchronous event signalling. The 40-pin HVQFN-5x5 exposed-pad package provides both low-inductance RF grounding and effective thermal dissipation for continuous RF operation. The internal 80C51 core runs at up to 27.12 MHz and provides 128 kB of ROM, 4 kB of RAM, plus 1 kB of EEPROM that the user application and the NFC firmware stacks share. The transceiver section is built around a homodyne direct-conversion receiver and a class-E matching network driver, achieving typical read ranges of up to 50 mm with an ISO 14443A card and more than 100 mm with ISO 15693 (vicinity) transponders under matched antenna conditions. Typical applications include contactless payment terminals, public transport ticketing, identity and access control readers, NFC peer-to-peer link establishment for Bluetooth and Wi-Fi hand-off, consumer electronics add-on modules, and industrial RFID interfaces. Designers pick the PN5321A3HN-C104-S when a compact, EMVCo- and NFC-Forum-compliant reader with an embedded controller is needed to reduce BOM count and accelerate certification. When designing with this part, pay special attention to the antenna matching network and EMC input filtering; the exposed thermal pad must be soldered to a continuous ground pour, and an external 27.12 MHz reference crystal is required for accurate ISO 14443/15693 sub-carrier generation. Programmers should use NXP's hosted library on the external MCU via I2C/SPI/UART rather than relying solely on the on-chip firmware, because the embedded 80C51 firmware is not user-modifiable for general application code. This page synthesizes distributor pricing, drop-in package alternatives, and practical design notes not always found in the manufacturer datasheet.
PN5321A3HN-C10651 - NFC Controller 13.56MHz, 40-VFQFN | NXP
The NXP PN5321A3HN-C10651 is a highly integrated NFC (Near Field Communication) transceiver/controller module for contactless communication at 13.56 MHz, built around an 80C51 microcontroller core. Housed in a 40-pin VFQFN exposed-pad package, the PN532 supports multiple card/reader operating modes (ISO/IEC 14443A/B, ISO/IEC 18092, FeliCa, MIFARE) and provides three host interface options (I2C, SPI, UART) operating from a 2.7 V to 5.5 V supply. NFC controllers, also known as high-frequency RFID reader ICs, form the bridge between a host processor and a contactless smartcard or NFC peer. They modulate the 13.56 MHz carrier, perform anti-collision, and handle the link-layer protocol (ISO 14443-3 for proximity cards, NFCIP-1 for peer-to-peer). Within the broader system hierarchy, the PN532 sits between the application MCU (which runs the user transaction logic) and the antenna matching network, making this IC family a sub-class of RFID transceivers within RF & wireless semiconductors. Key features include an integrated RF output stage capable of driving a printed or wire loop antenna directly, hardware support for peer-to-peer NFCIP-1 mode, hardware crypto accelerator for MIFARE Classic crypto, and a flexible host interface selector (I2C/SPI/UART). The PN532 implements the full NFC Forum tag reading/writing specification and supports card emulation when paired with an external secure element. Firmware is on-chip (no external MCU code needed for basic read/write). Architecturally, the PN532 combines a 16 MHz 80C51 core for command processing, dedicated hardware for the 13.56 MHz RF front-end, and SRAM/ROM for the embedded firmware stack. The host MCU communicates through a single wire-selectable interface, while the analog front-end handles load modulation (RX) and 13.56 MHz ASK/OOK modulation (TX) with on-chip output stage rated to drive antennas per ISO/IEC 14443-2. Typical applications include payment terminals and POS readers, NFC-enabled access control readers, handheld payment terminals, peer-to-peer data exchange devices (Android Beam-style file sharing), and embedded RFID readers for industrial identification. NXP explicitly recommends the PN7120 or PN7150 (full-NCI USB/I2C front-ends) for new designs; PN5321A3HN-C10651 is maintained for legacy designs. When designing with this device, route the antenna traces as a 50 ohm-controlled differential pair, place the matching network components (typically pi-network of 220 nH/22 pF/220 nH) within 5 mm of the TX1/TX2 pins, and ensure the exposed pad is soldered with at least 8 thermal vias for ground return. Verify host interface voltage compatibility because I2C/SPI/UART signals are not 5V-tolerant on this part. This page synthesizes distributor pricing, drop-in alternatives (same-brand first, then cross-brand), and practical design notes not found in the manufacturer datasheet. It is intended for engineers maintaining PN532-based products or evaluating long-term availability.
PN5321A3HN-C10655 - NFC/RFID Transceiver IC 13.56MHz I2C/SPI/UART | NXP
The NXP PN5321A3HN-C10655 is an NFC/RFID transceiver IC and contactless communication controller operating at 13.56 MHz, integrating a transmission module that supports reader/writer, peer-to-peer, and card-emulation modes within a 40-pin HVQFN exposed-pad package. Built around the 80C51 microcontroller core, this highly integrated solution delivers ISO 14443 (Type A/B), ISO 18092 (NFCIP-1), FeliCa, and MIFARE protocol support across 106 kbit/s, 212 kbit/s, and 424 kbit/s air-interface data rates. The part is supplied under the C106,55 designator and runs across a 2.7 V to 5.5 V input range with a low operating supply current of roughly 12 microamps in low-power wake-up mode, enabling battery-powered contactless terminals and handheld readers. An NFC (Near Field Communication) controller is a short-range wireless transceiver that operates on the 13.56 MHz ISM band and implements the ISO 14443 / ISO 18092 protocol stack to enable contactless data exchange between a reader and a card, peer device, or NFC tag. As a category, NFC controllers fall under RFID (radio frequency identification) read/write ICs, which sit within the broader wireless transceiver hierarchy and ultimately under the RF & wireless semiconductor taxonomy. The PN532 sits near the top of this hierarchy because it integrates an entire contactless front-end including the analog demodulator, RF transmitter, host interface controllers, and on-chip microcontroller — typically only the external antenna and matching network are left to the designer. Key features of the PN5321A3HN include on-chip antenna driver stages, hardware-accelerated data framing/verification, selectable I2C / SPI / UART host interfaces for flexible host MCU connectivity, integrated demodulator and decoder for both 100% ASK and 10% ASK modulation, and a true hardware low-power wake-up function that periodically polls the RF field and minimizes idle current. The 13.56 MHz carrier frequency is compliant with ISO/IEC 14443-A/B, ISO/IEC 18092 (NFCIP-1), FeliCa, and the MIFARE Classic / MIFARE Ultralight / NTAG tag families, giving designers a single-chip solution for most 13.56 MHz contactless ecosystems. The device architecture pairs an 80C51-compatible MCU core for command processing with dedicated contactless front-end analog blocks, exposing its registers and ISO/IEC 14443-3 frame handling over the host-selected serial interface. Designers typically treat the PN532 as an attached peripheral offloaded to a host microcontroller, sending ADPU frames via I2C/SPI/UART and receiving interrupts on detected targets or collisions. The HVQFN-40 exposed-pad package exposes a thermal pad that should be soldered to a continuous ground plane to dissipate heat from the RF output stage during continuous transmit. Typical applications include contactless point-of-sale terminals, handheld NFC readers and writers, NFC-enabled microcontroller breakout boards, public-transit and electronic-ticket readers, access-control key fob readers, and asset-tracking or inventory RFID writers. The 2.7 V to 5.5 V supply range also makes the part compatible with both 3.3 V microcontrollers and 5 V legacy systems. When designing with this device, route the antenna traces as a controlled-impedance 50-ohm differential loop on the PCB and add the required EMC matching components as specified in the application circuit. Always tie the exposed thermal pad to a low-impedance ground plane and respect the host-interface logic-level constraints when connecting to a 3.3 V MCU. Confirm the firmware driver matches the chosen bus mode (I2C / SPI / UART) before bringing up the reader, because mode setting differs between the variants of the PN532 firmware family. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
PN5331B3HN - 13.56MHz NFC Controller, USB Interface | NXP
The NXP Semiconductors PN5331B3HN is a highly integrated Near Field Communication (NFC) transceiver module operating at 13.56 MHz, housed in a 40-pin VFQFN exposed-pad package and built around an 80C51 microcontroller core. The device operates from a 2.5 V to 3.6 V supply, integrates a USB 2.0 full-speed interface, and supports six contactless operating modes spanning ISO/IEC 14443A/MIFARE, ISO/IEC 14443B, FeliCa reader/writer, and card emulation for MIFARE 1 KB/4 KB and FeliCa tags. An NFC controller is a contactless transceiver IC that combines an analog RF front-end (antenna driver, demodulator, load modulator) with a digital protocol stack and host interface. NFC controllers sit between the antenna and the host MCU or SoC, converting 13.56 MHz RF energy into protocol-correct frames for ISO/IEC 14443, ISO/IEC 15693, FeliCa, and peer-to-peer applications. They belong to the broader family of RFID reader/writer ICs, which in turn fall under short-range wireless transceivers and secure connectivity devices used in payments, access control, and identification. The PN5331B3HN's key differentiating features include a maximum RF output power of approximately 200 mW into a 50 ohm load, on-chip transmit/receive frame handling, hard-wired crypto accelerators (MIFARE Classic Crypto1 plus optional secure-element companion over NFC-WI/S2C), and an integrated LOADMOD pin for driving an external active load modulation circuit. The exposed thermal pad of the VFQFN-40 package provides a low theta_JA path, supporting continuous read/write duty cycles typical of payment terminals and access readers. Architecturally, the device integrates an 80C51-compatible core with on-chip ROM/RAM, a dedicated 13.56 MHz air-interface state machine, and a USB 2.0 full-speed PHY. Firmware handles framing, anti-collision, and the upper layers of ISO/IEC 14443-3, while the host driver stack (available from NXP) runs on the external MCU or directly on a Windows/Linux USB host. This split-firmware model has made the PN533 a long-running reference platform for open-source NFC development and for proprietary payment-terminal designs. Typical applications include plug-and-play USB NFC readers for point-of-sale terminals, contactless access-control readers, public-transport validators, and NFC peer-to-peer links for device pairing. The wide protocol coverage also supports industrial asset-tracking readers and embedded NFC modules for handheld POS hardware. A practical design consideration is that the PN5331B3HN must be paired with a properly tuned 50 ohm-matched antenna and EMC-compliant external components per the NXP reference design; deviations in matching network Q can significantly reduce read range. For secure payment applications, an external secure element connected via NFC-WI/S2C is required to store credentials. This page consolidates distributor pricing, drop-in alternatives, and PCB-level design notes derived from the NXP datasheet and reference manuals, providing synthesis not found on any single distributor page.
PN5331B3HN-C27051 - 13.56MHz NFC Transceiver, USB, 40-VFQFN | NXP
The NXP Semiconductors PN5331B3HN-C27051 is a highly integrated contactless transceiver module for Near Field Communication (NFC) at 13.56 MHz, built around an 80C51 microcontroller core with integrated USB interface and packaged in a 40-pin VFQFN exposed-pad housing. It operates from a 2.5V to 3.6V supply and supports ISO/IEC 14443A/MIFARE, ISO/IEC 14443B, FeliCa, and ISO/IEC 18092 NFCIP-1 peer-to-peer protocols, covering the full 13.56 MHz contactless standards stack in a single silicon die. An NFC controller is a specialized radio transceiver IC that handles modulation, demodulation, framing, anti-collision, and cryptographic handshaking for short-range (typically <10 cm) inductive-coupled communications. In the broader system hierarchy, the PN533 sits between a host MCU or USB host (which runs the application stack) and the analog RF front end; it is a member of the contactless reader/writer IC family, which itself is a sub-category of RF/wireless interface ICs under the broader semiconductor umbrella. Key features include six selectable operating modes (ISO/IEC 14443A/MIFARE Reader/Writer, FeliCa Reader/Writer, ISO/IEC 14443B Reader/Writer, MIFARE 1 KB/4 KB Card emulation, FeliCa Card emulation, and NFCIP-1 peer-to-peer), integrated load modulation for card-emulation, hardware-accelerated crypto support via the NFC-WI/S2C secure-element interface, and a USB 2.0 full-speed peripheral interface for plug-and-play host connection. The 80C51 firmware core executes the complete protocol stack on-chip, offloading the host processor. Typical applications include USB NFC readers for contactless payment terminals, NFC peer-to-peer file transfer, access control readers, public transit fare collection, and embedded development boards demonstrating MIFARE/FeliCa capabilities. The exposed thermal pad and QFN footprint also support compact reader antenna designs where PCB area is constrained. When designing with this part, note that a complete secure element (e.g., an NXP SmartMX secure IC) is required for EMVCo payment-grade functionality via the NFC-WI/S2C interface. The integrated USB interface eliminates the need for an external bridge IC, reducing BOM cost and PCB area versus UART/SPI-only NFC front-ends.
PN5331B3HN/C270,55 - USB NFC Controller HVQFN-40 | NXP Semiconductors
The NXP Semiconductors PN5331B3HN/C270,55 is a highly integrated USB Near Field Communication (NFC) transceiver module built around an 80C51 microcontroller core, operating at 13.56 MHz contactless carrier frequency. It supports six operating modes including ISO/IEC 14443A/MIFARE Reader/Writer, FeliCa Reader/Writer, ISO/IEC 14443B Reader/Writer, ISO/IEC 14443A/MIFARE Card emulation (1 KB/4 KB), and FeliCa Card emulation. The device integrates a USB 2.0 full-speed interface for plug-and-play host connectivity. A Near Field Communication controller (NFC controller) is a contactless short-range wireless IC that operates at 13.56 MHz and enables proximity data exchange between a reader/writer host and contactless smart cards, RFID tags, or peer NFC devices. Within the electronics taxonomy, the PN5331B3HN sits at the hierarchy: NFC transceiver -> 13.56 MHz RFID IC -> contactless reader -> short-range wireless IC -> RF & Wireless semiconductor. It commonly pairs with a secure element (such as an SE050C or SmartMX family IC) to deliver hardened payment and identity applications through the dedicated NFC-WI/S2C interface. Key features include a 40-pin HVQFN exposed-pad package, a supply voltage range of 2.5 V to 3.6 V, integrated antenna drivers with load modulation support, hardware-accelerated crypto engines for MIFARE Classic and Ultralight, an on-chip 80C51 core for protocol handling, and a LOADMOD pin to drive external active modulation circuits. The exposed thermal pad ensures low theta-JA for USB-powered operation. The USB NFC integrated solution targets rapid development of contactless reader peripherals. The PN5331B3HN embeds an 80C51 core with on-chip RAM and ROM for firmware execution, plus a dedicated analog front end optimized for ISO 14443 and FeliCa air interfaces. The transceiver integrates a high-power RF output stage and supports both internal load modulation (for proximity cards) and external LOADMOD drive, enabling designs that meet stringent EMV contactless, NFC Forum, and ISO 14443 read-range targets without external boosters. Typical applications include contactless payment terminals, physical access control readers, public transit fare-collection terminals, NFC peer-to-peer pairing modules, and contactless reader/writer development kits. The integrated USB interface makes it especially attractive for PC-attached reader dongles and developer evaluation boards. When designing with this part, note that firmware must be loaded over USB or via the host interface, and antenna matching components require per-design tuning to comply with regulatory EMC limits. Pair the PN5331B3HN with a secure element for EMVCo/NFC Forum payment certification, and follow NXP application note AN10780 for antenna matching network selection. This page synthesizes distributor pricing, drop-in alternatives and practical design notes not found in the manufacturer datasheet alone, providing engineering context beyond raw spec repetition.