This post explains for the semiconductor CD9088CB.
The Part Number is CD9088CB.
The function of this semiconductor is 1-Chip FM Electrical Tuner IC.
Manufacturers : Wuxi Huajing Microelectronics
a single-chip electrically tuned FM radio circuit. Its peripheral circuit is simple. The application cost is low. The built-in PLL system with 70kHz IF frequency is selectively implemented by active RC filter. The mute circuit can suppress non-IF signals and too weak IF signals.
1. All functional circuits containing radio from RF input to audio output 2. Silent circuit 3. Built-in automatic frequency control system for mechanical tuning 4. Power polarity protection 5. Working power supply voltage can be as low as 1.8V 6. Automatic search from 88MHz key reset to 108 MHz frequency range
1. Low External Part – No Coils 2. Only One Adjustment of Semifixed Volume for Oscillation Frequency 3. High Operating Stability Against Environmental Condition Change 4. Total System Including Stereo Demodulator, Automatic Stereo-Moanural Switching Circuit, and Stereo Indicator Lamp Driver
Function Block Diagram
Absolute maximum ratings ( Ta = 25°C )
1. Supply Voltage : Vcc = 16 V 2. Lamp Current : IL = 75 mA 3. Power Dissipation : Pt = 400 mW 4. Operating Temperature : Topr = -20 to +85°C 5. Storage Temperatue : Tsg = -55 ~ +125°C