Multi-Message Single-Chip Voice Record & Playback Devices The ISD1730 is a voice record and playback device manufactured by ISSI (Integrated Silicon Solution, Inc.). Below are the specifications, descriptions, and features based on Ic-phoenix technical data files:
### **Specifications:**
- **Memory:** 30 seconds of recording time (non-volatile Flash memory).
- **Sampling Frequency:** 4.0 kHz, 5.3 kHz, 6.4 kHz, or 8.0 kHz (selectable).
- **Audio Output:** Single-ended or differential output.
- **Supply Voltage:** 2.4V to 5.5V.
- **Operating Current:** ~25 mA (typical during playback/record).
- **Standby Current:** <1 µA (typical).
- **Interface:** Serial (SPI) or parallel control options.
- **Operating Temperature Range:** -40°C to +85°C.
- **Package:** 28-pin SOIC or PDIP.
### **Descriptions:**
- The ISD1730 is a single-chip voice recording and playback solution with non-volatile Flash memory.
- It supports direct analog storage, eliminating the need for compression algorithms, ensuring high-quality audio.
- Suitable for applications requiring short-duration voice prompts, alarms, or messaging.
### **Features:**
- **Non-volatile Storage:** Retains audio without power.
- **Multiple Sampling Rates:** Adjustable for quality vs. duration trade-offs.
- **Low Power Consumption:** Ideal for battery-powered devices.
- **Flexible Interface:** Supports both serial (SPI) and parallel control modes.
- **On-chip Audio Processing:** Includes microphone preamp, automatic gain control (AGC), and speaker driver.
- **Multi-Message Management:** Supports multiple messages with individual addressing.
- **End-of-Message (EOM) Marker:** Allows precise message management.
For detailed electrical characteristics and application notes, refer to the official ISD1730 datasheet from ISSI.
