USB Controller Features 26 MHz SPI

The MAX3420E 12-Mb/s USB peripheral controller provides a 26-MHz SPI interface as well as all the necessary digital logic and analog circuitry to implement a full-speed, USB 2.0-compliant peripheral. Integral functions include a ±15-kV, ESD-protected USB transceiver, USB serial interface engine (SIE), endpoint buffer memory, SPI slave interface, and a 1.5 kΩ D+ pull-up resistor. The 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 and checking, and bus retries. Additional features include four general-purpose inputs and outputs and an operating temperature range from -40°C to +85°C. Available in 7 mm 3 7 mm, 32-pin TQFP and 4 mm 3 4 mm, 24-pin TQFN packages, prices start at $2.65 each/1,000. MAXIM INTEGRATED PRODUCTS, Sunnyvale, CA. (800) 998-8800.