Industry’s smallest SIM card level translator

HMI has launched its HL5301WL01, a SIM card level translator with level shifting and IEC610004-2 electrostatic charge protection for SIM card ports.

The translator integrates two unidirectional level shifters for the RST and CLK signals, a bidirectional level shifter for I/O, and +/-8kV ESD protection on all SIM card contacts.

The device offers several key features tailored for optimal performance and efficiency. With an impressively low quiescent current of just 0.3μA, power consumption is minimised, extending battery life for prolonged operation. Also, the advanced one-shot circuit improves 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 EMI for enhanced reliability.

The device supplies swift data processing capabilities at clock speeds of up to 10MHz. Adhering to ISO-7816-3 standards, it includes a shutdown feature for SIM card signals, ensuring compliance and optimised functionality.

Available in a WLCSP-9, 0.35 mm pitch, 1.12mm x 1.12mm, it is the industry’s smallest SIM card level translator ideal for mobile applications, such as smartphones, tablet PCs, and wireless modems.

“As a reference design for leading OEM mobile manufacturers, the HL5301WL01 effectively meets their rigorous standards, addressing their critical requirement with superiority,” stated Mason Choi, VP/GM of Mobile Audio Solutions BU at HMI.