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MFRC522 数据表(PDF) 74 Page - NXP Semiconductors |
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MFRC522 数据表(HTML) 74 Page - NXP Semiconductors |
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74 / 96 page  MFRC522_33 © NXP B.V. 2009. All rights reserved. Product data sheet PUBLIC Rev. 3 — 26 October 2009 112133 74 of 96 NXP Semiconductors MFRC522 Contactless reader IC [1] The voltage on pin RX is clamped by internal diodes to pins AVSS and AVDD. [2] Ipd is the total current for all supplies. VOL LOW-level output voltage VDD(TVDD) =3V; IDD(TVDD) = 32 mA; CWGsP[5:0] = 0Fh - - 0.15 V VDD(TVDD) =3V; IDD(TVDD) = 80 mA; CWGsP[5:0] = 0Fh - - 0.4 V VDD(TVDD) = 2.5 V; IDD(TVDD) = 32 mA; CWGsP[5:0] = 0Fh - - 0.24 V VDD(TVDD) = 2.5 V; IDD(TVDD) = 80 mA; CWGsP[5:0] = 0Fh - - 0.64 V Current consumption Ipd power-down current VDDA =VDDD = VDD(TVDD) = VDD(PVDD) =3V hard power-down; pin NRSTPD set LOW [2] -- 5 µA soft power-down; RF level detector on [2] -- 10 µA IDDD digital supply current pin DVDD; VDDD = 3 V - 6.5 9 mA IDDA analog supply current pin AVDD; VDDA =3V; bit RcvOff = 0 - 7 10 mA pin AVDD; receiver switched off; VDDA =3V; bit RcvOff = 1 -3 5 mA IDD(PVDD) PVDD supply current pin PVDD [3] - - 40 mA IDD(TVDD) TVDD supply current pin TVDD; continuous wave [4][5][6] - 60 100 mA IDD(SVDD) SVDD supply current pin SVDD [7] -- 4 mA Clock frequency fclk clock frequency - 27.12 - MHz δclk clock duty cycle 40 50 60 % tjit jitter time RMS - - 10 ps Crystal oscillator VOH HIGH-level output voltage pin OSCOUT - 1.1 - V VOL LOW-level output voltage pin OSCOUT - 0.2 - V Ci input capacitance pin OSCOUT - 2 - pF pin OSCIN - 2 - pF Typical input requirements fxtal crystal frequency - 27.12 - MHz ESR equivalent series resistance - - 100 Ω CL load capacitance - 10 - pF Pxtal crystal power dissipation - 50 100 mW Table 153. Characteristics …continued Symbol Parameter Conditions Min Typ Max Unit |
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