ISD4002-120SY

Overview

The ISD4002-120SY is a single-chip voice record and playback solution from the ISD4002 ChipCorder series, manufactured by Nuvoton Technology Corporation. It provides 120 seconds of recording duration at an 8.0 kHz sampling frequency with a typical filter passband of 3.4 kHz. The device operates on a single 3-volt supply (2.7 V to 3.3 V) and features low-power consumption, including a standby current of 1 µA. It utilizes multilevel Flash memory for non-volatile storage and communicates via a Serial Peripheral Interface (SPI). The component is housed in a 28-SOIC package.

Feature Summary

• Single-chip architecture integrating analog transceivers, filters, and high-density Flash memory for direct analog signal storage without digitization or compression.
• AutoMute feature that attenuates background noise during silence periods to improve audio clarity.
• Fully addressable message management capabilities allowing multiple messages to be recorded and played back through SPI control.
• Non-volatile storage ensuring message retention for up to 100 years and support for over 100,000 record cycles.

Applications

• Portable consumer electronics such as cellular phones and greeting cards requiring brief voice messaging.
• Industrial control systems and alarm devices utilizing voice alerts instead of simple beep signals.
• Educational toys and interactive products needing natural voice reproduction.

Procurement Notes

Verify the specific ordering suffix 'SY' corresponds to the 28-SOIC package variant when sourcing components. Confirm the commercial operating temperature range of 0°C to +70°C aligns with your system requirements. Ensure the microcontroller interface supports the required SPI protocol for proper communication with the device.

Selection Notes

Select this model specifically for applications requiring exactly 120 seconds of recording time at 8.0 kHz sampling rate. Consider alternative part numbers within the ISD4002 series if longer durations like 150, 180, or 240 seconds are needed, noting that higher durations result in lower sampling frequencies and reduced audio bandwidth.

Part Context

The ISD4002-120SY belongs to the ISD4002 ChipCorder series, which offers single-chip solutions for 2 to 4-minute messaging applications. This series is designed for microprocessor-based systems and uses patented multilevel storage technology to store voice signals directly onto the memory array, providing high-quality audio reproduction comparable to analog tape.

Replacement Considerations

I3900FYI is listed as a manufacturer-recommended substitute for the ISD4002-120SY.

FAQ

How does the AutoMute feature function?

The AutoMute feature minimizes background noise during playback by attenuating the signal by 6 dB when no audio signal is detected. It can be disabled by connecting the AM CAP pin directly to VCCA.

What is the recommended input signal level for optimal quality?

For single-ended input mode, a maximum of 32 mVp-p should be capacitively coupled to ANA IN+. In differential mode, the maximum input signal should be 16 mVp-p.

Can the internal clock be replaced with an external one?

Yes, for greater precision, an external clock can be applied to the XCLK pin. For the ISD4002-120, a 1024 kHz clock is required to maintain the 8.0 kHz sampling frequency.