This standard frequency Crystal Oscillator can be used to generate 20MHz clock signal. This is the one we have used to give the microcontroller an external clock signal in our TechPIC and TechAVR development boards.
Specification:
Frequency 20 MHz
Frequency Tolerance ±30ppm
Load Capacitance 20PF
Frequency Stability ± 20ppm
Mounting Type DIP
No. of Pins 2
Pin Length 13mm
Size(Each) 26 x 11 x 4mm/ 1" x 0.43" x 0.16" (L*W)
