MFRC522 datasheet(2/96 Pages) NXP

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MFRC522_34

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Product data sheet

PUBLIC

Rev. 3.4 — 5 March 2010

112134

2 of 96

NXP Semiconductors

MFRC522

Contactless reader IC

SPI up to 10 Mbit/s

I2C-bus interface up to 400 kBd in Fast mode, up to 3400 kBd in High-speed mode

RS232 Serial UART up to 1228.8 kBd, with voltage levels dependant on pin

voltage supply

FIFO buffer handles 64 byte send and receive

Flexible interrupt modes

Hard reset with low power function

Power-down by software mode

Programmable timer

Internal oscillator for connection to 27.12 MHz quartz crystal

2.5 V to 3.3 V power supply

CRC coprocessor

Programmable I/O pins

Internal self-test

Quick reference data

[1]

Supply voltages below 3 V reduce the performance in, for example, the achievable operating distance.

[2]

VDDA, VDDD and VDD(TVDD) must always be the same voltage.

[3]

VDD(PVDD) must always be the same or lower voltage than VDDD.

[4]

Ipd is the total current for all supplies.

[5]

IDD(PVDD) depends on the overall load at the digital pins.

[6]

IDD(TVDD) depends on VDD(TVDD) and the external circuit connected to pins TX1 and TX2.

[7]

During typical circuit operation, the overall current is below 100 mA.

[8]

Typical value using a complementary driver configuration and an antenna matched to 40

Ω between pins TX1 and TX2 at 13.56 MHz.

Table 1.

Quick reference data

Symbol

Parameter

Conditions

Min

Typ

Max

Unit

VDDA

analog supply voltage

VDD(PVDD) ≤ VDDA = VDDD = VDD(TVDD);

VSSA =VSSD =VSS(PVSS) =VSS(TVSS) =0V

[1][2] 2.5

3.3

3.6

VDDD

digital supply voltage

2.5

3.3

3.6

VDD(TVDD) TVDD supply voltage

2.5

3.3

3.6

VDD(PVDD) PVDD supply voltage

[3] 1.6

1.8

3.6

VDD(SVDD) SVDD supply voltage

VSSA =VSSD =VSS(PVSS) =VSS(TVSS) = 0 V

1.6

3.6

Ipd

power-down current

VDDA =VDDD = VDD(TVDD) =VDD(PVDD) =3V

hard power-down; pin NRSTPD set LOW

[4] --

μA

soft power-down; RF level detector on

[4] --

μA

IDDD

digital supply current

pin DVDD; VDDD =3V

6.5

IDDA

analog supply current

pin AVDD; VDDA = 3 V, CommandReg register’s

RcvOff bit = 0

-7

pin AVDD; receiver switched off; VDDA =3V,

CommandReg register’s RcvOff bit = 1

-3

IDD(PVDD)

PVDD supply current

pin PVDD

[5] --

IDD(TVDD)

TVDD supply current

pin TVDD; continuous wave

[6][7][8] -60

100

Tamb

ambient temperature

HVQFN32

−25

+85

°C

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