ISD1416SY

Overview

The ISD1416SY is a single-chip voice record/playback device from the ISD1400 series, manufactured by Winbond and distributed by Nuvoton Technology Corporation. It utilizes Multi-Level Storage (MLS) technology to store analog audio signals directly in non-volatile memory without digitization or compression. The device provides a nominal recording duration of 16 seconds with an internal sampling frequency of 8.0 kHz and a filter passband of 3.3 kHz. It operates on a single +5V supply voltage within a range of 4.5V to 5.5V. The component features an on-chip oscillator, microphone preamplifier with Automatic Gain Control (AGC), anti-aliasing filter, smoothing filter, and a differential Class D speaker amplifier capable of driving loads as low as 16 Ω. It supports edge-activated (PLAYE) and level-activated (PLAYL) playback modes.

Feature Summary

• Direct analog storage using patented Multi-Level Storage (MLS) technology for natural voice reproduction
• Integrated differential Class D speaker driver eliminating the need for external coupling capacitors
• Automatic power-down mode reducing standby current to typically 0.5 µA
• Fully addressable architecture supporting multiple message segments via A0-A7 pins

Applications

• Short-duration messaging systems requiring high-quality voice prompts
• Toy and gift products utilizing push-button voice interaction
• Industrial control panels with recorded status announcements
• Security alarm systems with verbal alerts

Procurement Notes

Verify the manufacturer origin, as the ISD1400 series was originally designed by Winbond. Confirm that the specific ordering suffix 'SY' corresponds to the lead-free SOIC-28 package variant. Ensure compatibility with existing designs regarding the single +5V power requirement and check for availability given the series' maturity in the market.

Selection Notes

Select the ISD1416SY when a fixed 16-second duration at 8.0 kHz sampling rate is required. Choose this model over the ISD1420 if higher speech quality is prioritized over longer recording time. Consider the ISD1416P or ISD1416X if different packaging formats such as PDIP or die are needed. Verify that the application does not require variable duration control via external resistors, as this model relies on factory-configured internal clocking.

Part Context

The ISD1416 belongs to the ISD1400 ChipCorder series, which introduced direct analog storage solutions for short-duration audio applications. This series bridges the gap between simple one-time record players and complex digital voice ICs. The ISD1416 specifically targets applications needing 16 seconds of audio, offering a balance between sound fidelity and memory capacity compared to the 20-second ISD1420 variant.

Replacement Considerations

The ISD1810 is a documented successor in the ISD1800 series, offering similar functionality with improved noise performance and lower voltage options. For pin-compatible replacements within the same family, verify the ISD1416P (PDIP) or ISD1416X (Die) if package changes are acceptable.