668-0011 Rabbit Semiconductor, 668-0011 Datasheet - Page 257

• Manufacturer Part Number: 668-0011
• Description: IC MPU RABIT3000A 55.5MHZ128LQFP
• Manufacturer: Rabbit Semiconductor

Specifications of 668-0011

• Rohs Status: RoHS non-compliant
• Processor Type: Rabbit 3000 8-Bit
• Speed: 55.5MHz
• Voltage: 2.5V, 2.7V, 3V, 3.3V
• Mounting Type: Surface Mount
• Package / Case: 128-LQFP
• Features: -
• Other names: 316-1043

Since the built-in high-speed oscillator buffer generates a clock that is very close to having
a 50% duty cycle, to obtain the highest clock speeds using the clock doubler you must use
an external oscillator buffer that will allow for duty-cycle adjustment by changing the
resistance of the power and ground connections as shown below.
Figure 27-5. External Oscillator Buffer
Chapter 27 Specifications
247