V4070IC

EM MICROELECTRONIC-MARIN SA V4070 Crypto Contactless Identification Device Features • • • • • • • • • • • • • • On Chip Crypto-Algorithm Two Way Authentication protocol 96 bits of Secret-Key in EEPROM (unreadable) 32 bits of fix Device Identification 30 bits of USER_MEMORY (UM) with read access (OTP) Secret-Key programmable via CID-Interface Lock-Bits to inhibit programming Data Transmission performed by Amplitude Modulation Bit Period = 32 periods of carrier frequency 200 pF on chip Resonant Capacitor (untrimmed) -40 to +85°C Temperature range 115 kHz TO 135 kHz Field Frequency On chip Rectifier and Voltage Limiter No external supply buffer capacitance needed due to low power consumption Typical Operating Configuration Coil 1 L V4070 Coil 2 Typical value of inductance at 125 KHz is 8 mH Figure 1 Description The V4070 is a CMOS integrated circuit intended for use in electronic Read/Write RF Transponders. The chip contains an implementation of a crypto-algorithm with 96 Bits of user configurable secret-key contained in EEPROM. It also provides a unique Device Identification of 32 Bits that can never be modified as well as 30 Bits of freely programmable USER-MEMORY. Bits 15 and 14 of word 1 are used as Lock-Bits. The memory can only be accessed for writing or erasing if these two bits have the contents «10» as when they are delivered. The V4070 transmits data to the transceiver by modulating the amplitude of the electromagnetic field, and receives data and commands in a similar way. The coil of the tuned circuit is the only external component required, all remaining functions are integrated in the chip. Pin Assignment COIL 1 COIL 2 V4070 COIL1 COIL2 coil terminal / clock input coil terminal Figure 2 Applications • • High security automotive immobilizer High security hands-free access control 1 EM MICROELECTRONIC-MARIN SA Absolute Maximum Ratings Parameter Symb. Min. M a x . Unit Supply voltage V DD -0.3 9.5 V Voltage at remaining Vpin VSS - 0.3 VDD + 0.3 V pins -55 125 °C Storage temp. Tstore Operating temp. Top -40 85 °C Maximum AC peak Current induced on ICOIL -30 30 mA COIL1 and COIL2 Table 1 V4070 Handling Procedures This device has built-in protection against high static voltages or electric fields; however, anti-static precautions should be taken as for any other CMOS component. Unless otherwise specified, proper operation can only occur when all terminal voltages are kept within the supply voltage range. Stresses above these listed maximum ratings may cause permanent damage to the device. Exposure beyond specified electrical characteristics may affect device reliability or cause malfunction. System Principle Transceiver Data to be sent to transponder Modulator Transponder Oscillator Antenna Driver Coil 1 V4070 Data Decoder Filter & Gain Demodulator Coil 2 Data received from transponder RECEIVE MODE Signal on Transponder coil READ MODE Signal on Transceiver coil Signal on Transceiver coil Signal on Transponder coil RF Carrier Data RF Carrier Data Figure 3 2 EM MICROELECTRONIC-MARIN SA Electrical Characteristics Operating Conditions VDD = 2.5V VSS = 0V Parameter Supply voltage EEPROM write voltage Supply current/read Supply current/read/H Supply current/write Supply current/write/H Modulator voltage drop V4070 fcoil = 125 kHz Sine wave Symbol Conditions V DD Read Mode VEE Ir d Ir d H Iw r Iw r H VON Vcoil = 1Vpp Min. 2 3 Top = 25°C Typ. Max. 1) Unit V V 5 10 50 80 0.5 µA µA µA µA V Read Mode VDD=2.0V Read Mode VDD=5.0V Write Mode VDD=3.0V -40°C