YM3812 Datasheet – FM Operator – Yamaha ( PDF )

Part Number : YM3812

Function : FM Operator TYPE-LII ( OPL II )

Package : 24 Pin DIP or SOP type

Manufacturers : Yamaha


YM3812 FM Operator
Description :

The OPLII ( FM OPERATOR type-LII) is an LSI IC which can be used as a sound generation system for computer apparatus,teletext instruments, etc. The OPLII employs frequency modulation for the melody sounds, and has rhythm sounds very close to those of natural musical instruments, marking it possible to synthesize various tones by software control from a CPU.


YM3812 pinout


1. FM sound generation system for realistic sound
2. Built-in vibrato oscillator/amplitude modulation oscillator ( AM )
3. Composite sine wave speech synthesis also possible
4. 5V single power supply

Reference Site :

1. https://en.wikipedia.org/wiki/Yamaha_YM3812
2. https://www.youtube.com/watch?v=z3DU2mNBa6M&t=10m11s


YM3812 Datasheet PDF Download

YM3812 pdf



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CD2003GB Datasheet – FM/AM RADIO IC, 16 Pin

The Part Number is CD2003GB.

The function of this semiconductor is FM/AM RADIO IC.

The package is DIP 16 Pin Type

Manufacturers : China Hua Jing Electronics

Preview images :

1 page
CD2003GB image

Description :

The CD2003GP, CD2003GB is a monolithic IC designed for use as a FM/AM radio system.
Combined with audio power amplifier IC, a suitable FM/AM radio can be constituted.

Its features are:

1. No need for FM IFT, AM IFT, and FM detector coil

2. Adjustment free for FM detector circuit

3. Wide operating supply voltage range: VCC=1.8~7V (Tamb =25℃ )

4. Package: DIP16/SOP16


Pin Descriptions :

1. INFMR FM RF Input, 9. GNDOUT Output Ground

2. GNDIN Input Ground, 10. QUAD QUAD

3. OUTF MM FM Mixer Output, 11. OUTDET Detector Output

4. OUTAMM AM Mixer Output, 12. OSCAM AM Oscillation

5. AGC AGC Control, 13. OSCF M FM Oscillation

6. VCC Supply Voltage, 14. SW AM/FM Switch

7. INAMI AM IF Input, 15. TUNFM FM Tuner

8. INFMI FM IF Input, 16. INAMR AM RF Input


CD2003GB Datasheet