RC7104

The RC7104 is a clock synthesizer for Pentium based motherboard systems. The CPU output frequency can be "over driven" through a command to the serial IZC interface.

The features of RC7104 can be summarized as (1)employs fairchildis proprietary spread spectrum technology; (2)reduces measured EMI by as much as 10dB; (3)I2C programmable; (4)two skew-controlled copies of CPU clock; (5)SEL100/66# selects CPU frequency (100 or 66.8MHz); (6) over clocking up to 133MHz; (7)seven copies of PCI clock (synchronous w/CPU clock); (8)one copy of 14.31818 MHZ IOAPIC clock; (9)one copy of 48MHz USB clock; (10)24 or 48MHz clock is determined by resistor straps on power up; (11)one copy of 14.31818MHz REF clock.

The absolute maximum ratings of RC7104 are (1)VDD, VIN voltage on any pin with respect to GND: -05 to +70v; (2)TSTG storage temperature: -65 to +150°C; (3)TB ambient temperature under bias: -55 to +125°C; (4)TA operating temperature: 0 to +70°C; (5)VESD input ESD protection 2 (min) kV.(stresses greater than those listed in this table may cause per manent damage to the device. These represent a stress rating only. Operation of RC7104 at these or any other conditions above those specified in the operating sections of this specification is not implied. Maximum conditions for extended periods may affect reliability. )