Datasheet for Alpha Microelectronics AM9AK voice synthesizing CMOS IC series.
The AM9AK series are single‑chip CMOS voice synthesizing ICs that support 4‑bit LOGPCM encoding and can generate speech up to 3.24 or 7 seconds. The devices operate from a single supply of 2.2 V to 5.5 V and provide one output pin (O1) with multiple functional modes.
The datasheet details pin functions, electrical ratings, timing diagrams, and example application circuits. It also describes the EzSpeech software tool for programming voice data and the built‑in oscillator offering eight playback speeds from 5 kHz to 14.5 kHz. This manual is written in Chinese.
| Operating Voltage (VDD) | 2.0 – 5.5 V |
|---|---|
| Operating Frequency (FOSC) | 640 – 1856 kHz |
| Play Speed Range | 5 kHz – 14.5 kHz |
| Supply Current (IOP) | 500 µA (typical) |
| PWM Output Current | 108 mA (typical) |
| O1 Output Current | 286 mA (typical) |
| Number of Voice Steps | 256 |
The IC operates from 2.2 V up to 5.5 V.
The device provides 256 voice steps that can be grouped into one subtable.
Yes, PWM1 and PWM2 can directly drive buzzers or speakers of 8 Ω, 16 Ω, 32 Ω, or 64 Ω.