The TD7624AFN 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 format control

● 18-bit and 19-bit automatic discrimination circuit (when 3-wire bus selected)

● 4-bit bandswitch drive transistor

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

● Frequency Step : 31.25 kHz, 50 kHz and 62.5kHz (at 4 MHz X’tal used)

● Phase lock detector

● 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) : Low level

Charge-pump output current : ±60 µA

Phase comparator reference frequency divider ratio : 1 / 64