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Black rectangular RFID reader module with gold pins

Forest Grass USA

Forest Grass USA RC522 RFID Reader 13.56MHz 3.3V

SKU CH-3CPP-7ZXDV

A 13.56MHz RFID reader module with RC522 chip for contactless card communication at up to 424kbit/s

  • ColorBlack
  • SizeMedium
  • 56 MHz contactless read and write for ISO 14443A cards
  • SPI host interface reduces PCB connections and board space
  • Up to 424 kbit/s two-way data transfer rate
  • Low-voltage 3.3 V operation suits portable and handheld devices
  • Supports MIFARE series with CRYPTO1 encryption validation

RFID Reader for 13.56 MHz Projects

This module integrates the NXP MF RC522 chip to read and write ISO 14443A compatible cards and tags at 13.56 MHz. It operates on a 3.3 V supply and communicates with a host microcontroller through an SPI interface. The design targets hobbyists and developers building access-control, identification or smart-meter prototypes.

SPI Interface and MIFARE Support

The SPI connection reduces the number of PCB traces and keeps the board compact. On-board firmware handles ISO 14443A framing and error detection while the CRYPTO1 engine provides encryption for MIFARE Classic products. Data rates up to 424 kbit/s are supported for high-speed contactless communication.

Voltage and Speed Constraints

The reader requires a 3.3 V logic level; direct connection to 5 V systems will damage the chip without level shifting. Maximum throughput is limited to 424 kbit/s over the air and 10 Mbit/s on the SPI bus, so applications needing higher bandwidth or long-range reads are not suited to this module.

Highlights

  • 56 MHz contactless read and write for ISO 14443A cards
  • SPI host interface reduces PCB connections and board space
  • Up to 424 kbit/s two-way data transfer rate
  • Low-voltage 3.3 V operation suits portable and handheld devices
  • Supports MIFARE series with CRYPTO1 encryption validation

Specifications

ColorBlack
SizeMedium

Questions about this item

How often should the RC522 module be replaced under normal use?

The RC522 chip is a solid-state component with no moving parts and does not require scheduled replacement.

What throughput limit appears first during continuous RFID reads?

The SPI host interface and 424 kbit/s air protocol set the practical ceiling for sustained data transfer.

How much power does the reader draw and does it heat up when running all day?

It operates at 3.3 V with low current draw, so heat remains minimal during continuous operation.

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