The SP5655 is a single chip frequency synthesiser designed for TV tuning systems. Control data is entered in the standard I2C BUS format. The device contains 2 addressable current limited outputs and 4 addressable bidirectional open-collector ports, one of which is a 3-bit ADC. The information on these ports can be read via the I2C BUS. the device has one fixed I2C BUS address and 3 programmable addresses, programmed by applying a specific input voltage to one of the current limited outputs. This enables two or more synthesisers to be used in a system.

FEATURES
■ Complete 2·7GHz Single Chip System
■ High Sensitivity RF Inputs
■ Programmable via I2C BUS
■ Low Power Consumption (5V, 30mA)
■ Low Radiation
■ Phase Lock Detector
■ Varactor Drive Amp Disable
■ 6 Controllable Outputs, 4 Bidirectional
■ 5-Level ADC
■ Variable I2C BUS Address for Multi-tuner Applications
■ ESD Protection: 4kV, Mil-Std-883C, Method 3015 (1)
■ Switchable 4512/1024 Reference Divider
■ Pin and Function Compatible with SP5055S (2)

APPLICATIONS
■ Satellite TV
■ High IF Cable Tuning Systems