NFC Reader Replacement Options

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Here are three 13.56 MHz NFC reader ICs that support SPI and are 3.3 V-compatible. You can use one of these to replace U2 in your design:

Table

OptionPart NameDescriptionPackageVoltage RangeLibrary LinkDatasheet
1PN7160B1HN/C100EFeliCa, ISO 14443, ISO 15693, MIFARE, NFC reader IC; SPI interface40-VFQFN1.65 V–1.95 V, 3.0 V–3.6 V9357ae83-3020-449d-93f3-abebe64c53cePDF
2ST25R3911B-AQFTISO 14443, NFC reader IC with SPI; supports external antenna tuning32-VFQFN2.4 V–5.5 V380d28fd-378b-44b4-b160-b4fa5ede571dPDF
3PN5321A3HN/C106,51PN532 family NFC reader controller; SPI interface; very common, QFN-40QFN-403.3 V (nominal)88153aec-ff43-4e82-bb70-d76b1bdb3cb6PDF
Which one would you like to use to replace the RC522 (U2)?
Choose PN7160
Choose ST25R3911B
Pin mapping help
Antenna matching
Footprint dimensions
Sign up to send
U2
SCL
USER
IO8
ESP_RST
SDA
MOSI
RFID_IRQ
RFID_RST
BOOT
MISO
SCK
ESP_TX
RFID_CS
BOOT
SCK
ESP_RST
BOOT
SDA
MOSI
USER
ESP_RST
SCL
SDA
IO8
ESP_RX
SCL
LOCK
LOCK
MISO
ESP_TX
ESP_RX
LOCK
C5
Capacitance
0.01uF
+3V3
C6
Capacitance
0.01uF
C3
Capacitance
0.01uF
R2
Resistance
10kΩ
C4
Capacitance
22uF
+3V3
+3V3
+3V3
R1
Resistance
100kΩ
+3V3
U1
BOOT
C7
Capacitance
1uF
USER
R3
Resistance
10kΩ
+3V3
IC1
C8
Capacitance
22uF
PROG
+3V3
EN
OLED1
GND
MISO
SCL
+3V3
SDA
MOSI
IO8
SCK

WiFi RF-ID lock Module

WiFi RF-ID lock Module thumbnail
This project is a WiFi RF-ID Lock, which uses a Espressif ESP-8684 microcontroller for WiFi connectivity and a Handson Technology RC522 for RF-ID functionality. It also includes an OLED display and user control via a switch. A step-up power converter ensures consistent 3.3V power. #WiFi #MCU #ReferenceDesign #Module #ESP8684 #lock #OLED #RFID #reusable #module #simple-embedded #espressif #sublayout

Properties

creativecommons.org/licenses/by/4.0/

Pricing & Availability

Distributor

Qty 1

Digi-Key

$0.36–$0.51

Mouser

$0.57

Controls