Sunnyvale, Calif.The newest USB controller from Maxim Integrated Products dubbed the MAX3420E is designed with a 26-MHz serial peripheral interface (SPI) and integrates the digital and analog circuitry needed to implement a full-speed USB peripheral interface compliant to the USB specification 2.0.
The MAX3420E includes a ±15-kV ESD-protected USB transceiver, a USB serial interface engine (SIE), endpoint buffer memory an SPI slave interface and a 1.5-kilohm D+ pullup resistor.
The integrated USB transceiver features a programmable USB connect and disconnect, while the SIE handles low-level USB protocol details such as automatic NAK until ready, bit stuffing, CRC generation/checking and bus retries.
The device operates using a register set access by the SPI interface, which operates up to 26-MHz. Any type of SPI master, including a microprocessor, ASIC, or DSP, can add USB functionality using the 3- or 4-wire interface. A programmable interrupt output can be used to reduce or eliminate microprocessor polling.
Integrated logic-level translators allow the SPI interface to operate at a system voltage between 1.71-V and 3.6-V.
The MAX3420E operates over the extended temperature range of −40°C to +85°C.
The device is available in 7-mm X 7-mm, 32-pin TQFP and 4-mm X 4-mm, 24-pin TQFN packages. Prices start at $2.65 in 1,000-unit quantities.
Maxim Integrated Products, 1-800-998-8800, www.maxim-ic.com.