GENERAL DESCRIPTION
The MSM6650 family is the successor to OKI's MSM6375 family.  To ensure high-quality voice synthesis, the MSM6650 family members offer adaptive differential pulse-code modulation (ADPCM) playback, pulse-code modulation (PCM) playback, 12-bit D/A conversion, and on-chip –40 dB/octave low-pass filter (LPF).

FEATURES
• 4-bit ADPCM or 8-bit PCM sound generation
• Melody function
• Edit ROM function
• Two-channel mixing function
• Built-in random playback function
• Fade-out function via four-step sound volume attenuation
• Built-in beep tone of 0.5 kHz, 1.0 kHz, 1.3 kHz, or 2.0 kHz selectable with a specific code
• Sampling frequency of 4.0 kHz, 5.3 kHz, 6.4 kHz, 8.0 kHz, 10.6 kHz, 12.8 kHz, 16.0 kHz, or 32.0 kHz (32 kHz sampling is not possible when using RC oscillation)
• Up to 120 phrases
• Built-in 12-bit D/A converter
• Built-in –40 dB/octave low-pass filter
• Standby function
• Selectable RC or ceramic oscillation
• Package options:
18-pin plastic DIP (DIP18-P-300-2.54) (Product name: MSM6652-xxxRS/MSM6653-xxxRS/
                                                                      MSM6654-xxxRS/MSM6655-xxxRS/
                                                                      MSM6656-xxxRS/MSM6652A-xxxRS/
                                                                      MSM6653A-xxxRS/MSM6654A-xxxRS/
                                                                      MSM6655A-xxxRS/MSM6656A-xxxRS/
                                                                      MSM6658A-xxxRS)
24-pin plastic SOP (SOP24-P-430-1.27-K) (Product name: MSM6652-xxxGS-K/MSM6653-xxxGS-K/
                                                                      MSM6654-xxxGS-K/MSM6655-xxxGS-K/
                                                                      MSM6656-xxxGS-K/MSM6652A-xxxGS-K/
                                                                      MSM6653A-xxxGS-K/MSM6654A-xxxGS-K/
                                                                      MSM6655A-xxxGS-K/MSM6656A-xxxGS-K/
                                                                      MSM6658A-xxxGS-K/MSM66P54-03GS-K/
                                                                      MSM66P54-04GS-K/MSM66P56-03GS-K/
                                                                      MSM66P56-04GS-K)
20-pin plastic DIP (DIP20-P-300-2.54-W1) (Product name: MSM66P54-03RS/MSM66P54-04RS/
                                                                      MSM66P56-03RS/MSM66P56-04RS)
64-pin plastic QFP (QFP64-P-1420-1.00-BK) (Product name: MSM6650GS-BK)
64-pin plastic SDIP (SDIP64-P-750-1.778) (Product name: MSM6650SS)