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I2C communication to all 3 sensors
Differential input voltage: ±40mV
Communication is through a standard I2C-compatible interface
Open Circuit Voltage: 350mV
Maximum PWM frequency: 20KHZ
74HC20 (Dual 4-input NAND gate ) RFID 13.56 Mhz (Read - Write) RC522 I2C communication to all 3Introduction : 74HC20 is a dual 4 input NAND gate. Inputs include clamp diodes. This enables the use of current limiting resistors to interface inputs to voltages in excess of VCC. Features : supply voltage range 2. 0 V to 6. 0 V. CMOS low power dissipation. Latch up performance exceeds 100 mA per JESD 78 Class II Level B. CMOS input levels. Temperature range : 40 C to +125 C. Package Type : DIP 14.
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