3-WIRE AND I2C BUS SYSTEM, 2.3 GHz DIRECT TWO MODULUS-TYPE FREQUENCY SYNTHESIZER FOR CATV

The TD7623AFN can be combined with a micro CPU to create a highly functional frequency synthesizer. The control data conforms to 3-wire bus and standard I2C bus formats. BUS-SW can be used to easily switch for easy tuner system set-up.

FEATURES

● Direct two modulus-type frequency synthesizer

● Standard I2C bus format control with built-in read mode

● 3-wire bus 27-bit format control

● 4-bit bandswitch drive transistor

● 5-level A / D converter (when I2C bus selected)

● Frequency step : 50 kHz, 62.5 kHz, 250 kHz, and 333.3 kHz (at 4 MHz Xtal used)

● Phase lock detector

● Various function settings via program data

● Four address settings via address selector (when I2C bus selected)

● Power on reset circuit

● Flat, compact package : SSOP16 (0.65 mm pitch)

● Power on reset operation condition

Bandswitch register 1 to 4 : OFF

Tuning amplifier : ON

Tuning Voltage output (Vt) : High Level

Charge-pump output current : ±200 μA

Phase comparator reference frequency divider ratio : 1 / 80