A newer device is available. Please consider PIC18F4220. This powerful 8.25 MIPS (121 nanosecond instruction execution) yet easy-to-program (only 58 single word instructions) CMOS OTP-based 8-bit microcontroller packs Microchip's powerful PIC® architecture into an 40- or 44-pin package and is upwards compatible with the PIC16C5X, PIC12CXXX and PIC16CXX devices. PIC17C43 features additional timers, 2 capture functions, 2 PWM functions, External Memory Addressing, and a Universal Asynchronous Receiver Transmitter (USART). All of these features make it ideal for demanding real-time embedded control applications from precise motor control and industrial control to automotive, instrumentation and telecom applications.