TDD1742T

The TDD1742T is designed as one kind of low power, high performance frequency synthesizer in local oxidation CMOS technology. This device is designed for use in channelized VHF / UHF applications especially portable and mobil radios. The circuit incorporates many of the features of the HEF4750V (frequency synthesizer) and HEF4751 (universal divider), including a high-gain phase comparator together with an on-chip sample-and-hold capacitor and phase modulator.

Features of the TDD1742T are:(1)on-chip sample-and-hold capacitor;(2)low power consumption;(3)high-gain phase comparator with low levels of noise and spurious outputs;(4)auxiliary digital phase comparator for fast locking;(5)on-chip phase modulator;(6)simple interfacing to external memory;(7)microcontroller compatible;(8)power-on reset circuitry.

The absolute maximum ratings of the TDD1742T can be summarized as:(1)supply voltage ranges pin 14: 7 to 10 V;(2)supply voltage ranges pin 8: 4.5 to 5 V;(3)supply voltage ranges pin 1: 7 to 10 V;(4)supply current pin 14: 1.5 mA;(5)supply current pin 8: 100 uA. If you want to know more information about it, please download the datasheet in www.seekic.com or www.chinaicmart.com .