MAXIM Solution
Memory Card Interface Translates and Protects Signals
Abstract: This application note explains how to use the MAX13030E–MAX13035E logic-level translators as a memory-card level translator. An example circuit illustrates the advantages of the devices.
The circuit shown in Figure 1 shows how the MAX13030E–MAX13035E logic-level translator ICs translate the logic level of the memory-card signals, while protecting the signals against ESD strikes of up to ±15kV HBM (Human Body Model). The MAX13035E, for example, takes the 1.8V signals from any memory-card controller (for example, in a baseband processor, application processor, or multimedia processor) and automatically translates them to 3.3V. The device can perform the reverse process too. This circuit can be used for SD cards, MMC, Transflash® (microSD), MiniSD, MemoryStick, MemoryStick PRO, and similar memory cards.
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