MFRC522 datasheet(86/109 Pages) NXP

86 / 109 page

112132

Product data sheet

Rev. 3.2 — 22 May 2007

86 of 109

NXP Semiconductors

MFRC522

Contactless Reader IC

23.1.9 Output Pin characteristics for Pins AUX1 and AUX2

23.1.10 Output Pin characteristics for Pins TX1 and TX2

VIH

Input voltage High

0.7 AVDD --

VIL

Input voltage Low

0.3 AVDD V

COSCIN

Input capacitance

AVDD =2.8 V,

VDC = 0.65 V,

VAC =1VPP

-2

Table 165: Input Pin characteristics for OSCIN

Symbol

Parameter

Conditions

Min

Typ

Max

Unit

Table 166: Output Pin characteristics for Pins AUX1 and AUX2

Symbol Parameter

Conditions

Min

Typ

Max

Unit

VOH

Output voltage HIGH DVDD =3V,

IO =4 mA

DVDD -400 mV -

DVDD

VOL

Output voltage LOW

DVDD =3V,

IO =4 mA

DVSS

-DVSS +400 mV V

IOL

Output current drive

LOW

DVDD =3 V

IOH

Output current drive

HIGH

DVDD =3 V

Table 167: Output Pin characteristics for Pins TX1 and TX2

Symbol

Parameter

Conditions

Min

Typ

Max

Unit

VOH,C32,3V

Output voltage

HIGH

TVDD = 3 V and

ITX =32mA,

CWGsP =3Fh

TVDD -150 mV

VOH,C80,3V

TVDD = 3 V and

ITX =80mA,

CWGsP =3Fh

TVDD -400 mV

VOH,C32,2V5

TVDD = 2.5 V and

ITX =32mA,

CWGsP =3Fh

TVDD -240 mV

VOH,C80,2V5

TVDD = 2.5 V and

ITX =80mA,

CWGsP =3Fh

TVDD -640 mV

VOL,C32,3V

Output voltage

LOW

TVDD = 3 V and

ITX =32mA,

CWGsP =0Fh

150

VOL,C80,3V

TVDD = 3 V and

ITX =80mA,

CWGsP =0Fh

400

VOL,C32,2V5

TVDD = 2.5 V and

ITX =32mA,

CWGsP =0Fh

240

VOL,C80,2V5

TVDD = 2.5 V and

ITX =80mA,

CWGsP =0Fh

640

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