Electronic Products & Technology

SIM card level translator protects from ESD

Stephen Law   

Electronics Semiconductors card ESD SIM

HMI HL5301WL01 SIM card level translator delivers level shifting and IEC610004-2 electrostatic charge protection for SIM card ports. Device integrates two unidirectional level shifters for the RST and CLK signals, a bidirectional level shifter for I/O, and ±8kV electrostatic discharges (ESD) protection on all SIM card contacts. Device boasts several key features tailored for optimal performance and efficiency. With a low quiescent current of 0.3μA, power consumption is minimized, extending battery life for prolonged operation. Also, the advanced one-shot circuit enhances the rising time on I/O channels, ensuring swift and precise data transmission. Integrated pull-up resistors in I/O channels and pull-down resistors on the SIM card side streamline connectivity, while built-in series resistance in SIM side pins provides essential short protection and diminishes electromagnetic interference (EMI) for enhanced reliability.

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