I need to get an MCU with the following features.

1) smaller than 5x5mm QFN
2) 12 I/O or more
3) 1 USART
4) 1 SPI to interface an external 16bit DAC
5) with 128B EEPROM or more
6) 8-bit PWM or better
7) low current consumption with on-board caliberated oscillator
8) 8kB or 16kB flash, 256B SRAM
10) cheaper than US$3 at 1k quantity

Right now I am thinking of Atmel Mega88/168 AVR. I want to choose
from PIC18F, MSP430 and AVR or something similar with good C
compiler support.

Regards,
Xiaofan
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