3-Wire Bus Controlled Synthesiser

The SP5024 is a programming variant of the SP5510 allowing the design of one tuner with either I2C bus or 3-wire bus format depending on which device is inserted. The SP5024, when used with a TV varicap tuner, forms a complete phase locked loop tuning system. The circuit consists of a divide-by-8 prescaler with its own preamplifier and a 15 bit programmable divider controlled by a serially - loaded data register.

FEATURES

■Complete 1.3GHz Single Chip System

■Dual Standard 50kHz or 62.5kHz Step Size

■Low Power Consumption (5V 40mA)

■Programming Compatible with Toshiba TD6380 and TD6381 *

■Pin Compatible with SP5510 *

■Low Radiation

■Varactor Drive Amplifier Disable

■Charge Pump Disable

■Single Port 18/19 Bit Serial Data Entry

■Four Controllable Outputs

■ESD Protection †

*See notes on pin compatibility

† Normal ESD handling procedures should be observed

APPLICATIONS

■Satellite TV When Combined With SP4902 2.5GHz Prescaler

■Cable Tuning Systems

■VCRs