ISD1416SI

Overview

The ISD1416SI is a single-chip voice record/playback device from the ISD1400 series, offering a nominal duration of 16 seconds. It operates on a single +5V supply with an operating range of 4.5V to 5.5V. The device features an internal sampling frequency of 8.0 kHz and a filter passband of 3.3 kHz. It utilizes patented Multi-Level Storage (MLS) for non-volatile message storage, supporting up to 100,000 record cycles and 100-year retention. The component includes an on-chip oscillator, microphone preamplifier with Automatic Gain Control (AGC), anti-aliasing filter, smoothing filter, and speaker amplifier. Standby current is typically 0.5 µA.

Feature Summary

• Direct analog storage using Multi-Level Storage (MLS) technology for natural voice reproduction without digitization or compression.
• Fully addressable architecture allowing for multiple message handling via eight address inputs.
• Automatic power-down functionality that minimizes standby current consumption after record or playback cycles.
• Integrated audio processing including microphone preamplifier, AGC, and dual speaker outputs capable of driving low-impedance loads.

Applications

• Short-duration messaging systems requiring push-button operation
• Voice annotation and cueing devices
• Industrial control panels with status announcements
• Consumer electronics with simple voice feedback requirements

Procurement Notes

Verify the manufacturer origin as Winbond Technology Corporation, as the ISD1400 series was originally developed by Winbond before being acquired by Nuvoton. Confirm the package type matches the SI suffix (28-lead SOIC). Check for lead-free compliance if required by local regulations, as datasheets indicate both leaded and lead-free packaged types are available. Ensure the specific revision aligns with current design-in requirements.

Selection Notes

Select the ISD1416SI when a fixed 16-second recording duration at 8.0 kHz sampling rate is sufficient. Choose this part over the ISD1420 if shorter duration allows for smaller memory allocation or cost optimization. Consider the external clock pin (XCLK) if precise timing stability beyond the internal oscillator's tolerance is required for the application environment.

Part Context

The ISD1416SI belongs to the ISD1400 ChipCorder series, which provides high-quality, single-chip solutions for short-duration messaging. This series is characterized by its ability to store voice signals directly in non-volatile memory cells, eliminating the need for complex digital signal processing components. The family includes variants like the ISD1420 for longer durations.

Replacement Considerations

ISD1420SI offers similar functionality with a 20-second duration and 6.4 kHz sampling rate. For applications requiring different durations within the same series, verify compatibility with existing address decoding and timing constraints.