Premier Farnell
8bit mcu, 256k flash, 5v, smd, 2561; series:atmega; memory size, flash:256kb; eeprom size:4kb; memory size, ram:8kb; no of i/o lines:54; no. of adc inputs:8; timers, no. of:6; pwm channels, no of:10; clock frequency:16mhz; interface type:jtag, spi, usart; voltage, supply min:4.5v; voltage, supply max:5.5v; termination type:smd; case style:tqfp; no. of pins:64; operating temperature range:-40°c to +85°c; temp, op. max:85°c; temp, op. min:-40°c; base number:2561; bits, number in timer:16; bits, number in adc:10; ic generic number:2561; interrupts, external no. of:17; logic function number:2561; memory size:256k; memory size, program memory:256kb; memory type:flash; no. of bits:8; no. of inputs:54; no. of outputs:54; oscillator type:rc oscillator; packaging type:peel pack
http://grh.premierfarnell.com/grh.aspx?mid=1000082&sku=ATMEG... 
