NXP Semiconductors MFRC52201HN1,157

Overview

MFRC52201HN1,157 from NXP Semiconductors is a highly integrated 13.56 MHz contactless reader/writer IC supporting ISO/IEC 14443 A/MIFARE and NTAG protocols. It delivers up to 848 kBd bidirectional transfer speed, operates from 2.5 V to 3.3 V, integrates a 27.12 MHz crystal oscillator, and enables read/write communication with MIFARE Mini/1K/4K/Ultralight/DESFire EV1/Plus cards in access control systems.

For engineers reviewing the MFRC52201HN1,157 datasheet, MFRC52201HN1,157 pinout, MFRC52201HN1,157 application, or MFRC52201HN1,157 equivalent, this page provides verified technical context, validated pin functions, confirmed host interface timing (SPI up to 10 Mbit/s, I²C up to 3.4 Mbit/s), real-world operating distance (up to 50 mm), and precise alternative part comparisons for secure RFID system design.

Technical Context

The MFRC52201HN1,157 implements a complete analog front-end for 13.56 MHz contactless communication, including a transmitter capable of driving an antenna without external active circuitry and a robust receiver for demodulating ISO/IEC 14443 A signals. Its digital module handles full ISO/IEC 14443 A framing, parity, and CRC16 generation/check per Part 3.

It supports three host interfaces-SPI (slave mode, 10 Mbit/s), I²C-bus (slave only, up to 3.4 Mbit/s in High-speed mode), and UART (RS232-compatible, up to 1228.8 kBd)-with automatic interface detection at power-on reset. The internal 64-byte FIFO buffer, programmable timer, and hard/soft power-down modes enable low-power embedded integration.

Key Specifications

Pinout & Package

HVQFN32 package (SOT617-1), 5 mm × 5 mm × 0.85 mm body, thermally enhanced, no leads, 32-terminal surface-mount.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar contactless reader IC applications.

Compared with SL030-A and PN512, the MFRC52201HN1,157 uniquely integrates a 27.12 MHz oscillator, supports full MIFARE DESFire EV1/NTAG, and provides MFIN/MFOUT for powering external secure elements-making it the only option among the three that satisfies ICAO ePassport and EMVCo Level 1 certification requirements without external component additions.

Availability

MFRC52201HN1,157 is available at Aetrix Electronics and suitable for access control systems, transit fare validators, POS terminals, and secure ID document readers requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.

Supply support for MFRC52201HN1,157 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 core expertise in RFID, NFC, and secure microcontrollers.

The MFRC522 product line targets cost-sensitive yet security-critical contactless reader applications-including physical access, transportation, and payment-by integrating RF front-end, protocol engine, and multi-interface host connectivity into a single HVQFN32 package.

FAQ

What is the maximum supported data transfer speed between MFRC52201HN1,157 and MIFARE cards?

The MFRC52201HN1,157 supports bidirectional communication with MIFARE cards at up to 848 kBd, using modified Miller encoding (reader→card) and Manchester/BPSK (card→reader). This speed is confirmed in Table 4 of the official datasheet and applies to all supported MIFARE variants including DESFire EV1 and Plus. The MFRC52201HN1,157 achieves this rate through dedicated hardware acceleration in its contactless UART and bit encoding/decoding modules.

Does MFRC52201HN1,157 require an external crystal oscillator?

No, the MFRC52201HN1,157 includes an internal oscillator circuit compatible with a 27.12 MHz quartz crystal connected to OSCIN/OSCOUT pins. Section 7.1 confirms these pins serve as crystal oscillator terminals, and Section 3 lists "Internal oscillator for connection to 27.12 MHz quartz crystal" as a key feature. No external oscillator IC is needed-only the crystal and load capacitors.

Can MFRC52201HN1,157 interface directly with a microcontroller using I²C at 3.4 Mbit/s?

Yes, the MFRC52201HN1,157 supports I²C-bus interface in High-speed mode up to 3.4 Mbit/s, as stated in Section 3 and Section 8.1.4. It operates exclusively as an I²C slave, requiring no arbitration logic. The SDA and SCL lines include built-in spike suppression, and timing compliance is verified per NXP's I²C-bus specification rev. 2.1. The MFRC52201HN1,157 maintains full protocol compliance at this speed.

What is the typical operating distance of MFRC52201HN1,157 in read/write mode?

The typical operating distance of MFRC52201HN1,157 in Read/Write mode is up to 50 mm, as specified in Section 3. This value assumes optimal antenna design (e.g., 40 Ω matched between TX1/TX2), proper tuning, and 3.3 V supply. Performance decreases below 3 V (Section 4, Note [1]), and actual range depends on card type, orientation, and environmental RF conditions-not guaranteed for all MIFARE variants simultaneously.

How does MFRC52201HN1,157 handle power management for battery-powered devices?

The MFRC52201HN1,157 offers two power-down modes: hard power-down (5 µA, NRSTPD = LOW) disables oscillator and disconnects inputs; soft power-down (10 µA, RF level detector active) retains partial functionality for wake-on-field detection. Both modes are software-controllable via CommandReg, enabling ultra-low-power operation in portable readers. Section 4 confirms these currents at 3 V supply, and Section 3 lists "Hard reset with low power function" and "Power-down by software mode" as features.