ISD1916SYI

Overview

The ISD1916SYI is a single-chip multiple-message record/playback device from the ISD1900 ChipCorder series by Nuvoton Technology Corporation. It supports dual operating modes: Address Mode and Direct Mode, allowing flexible message configuration via hardware pins. The device operates on a supply voltage ranging from 2.4V to 5.5V. Sampling frequency is selectable from 4 kHz to 12 kHz using an external resistor (Rosc), which also determines the maximum recording duration of up to 32 seconds at 4 kHz. It features differential microphone inputs with automatic gain control (AGC) and a Class-D PWM speaker driver for direct audio output.

Feature Summary

• Dual operational modes including Address Mode for variable duration messages and Direct Mode for fixed-length random access messages.
• Integrated differential microphone preamplifier with automatic gain control (AGC) and feed-through capability.
• Built-in Class-D PWM speaker driver capable of directly driving an 8-ohm speaker without external amplification.
• Automatic power-down functionality after each operation cycle to minimize standby current consumption.

Applications

• Standalone voice messaging systems requiring simple hardware triggering.
• Industrial control panels with recorded status announcements or instructions.
• Consumer electronic devices featuring interactive voice prompts or feedback.
• Security alarm systems utilizing pre-recorded alerts or user-defined messages.

Procurement Notes

Verify the specific suffix 'SYI' against the manufacturer's official ordering information to confirm package type and temperature grade. Ensure the design accounts for the required external oscillator resistor value to set the desired sampling frequency and memory duration. Confirm that the application circuit provides stable power within the 2.4V to 5.5V range to prevent malfunction during abrupt power interruptions.

Selection Notes

Select this component when standalone voice recording and playback are required without a microcontroller. Choose based on the necessary message duration and number of messages; the ISD1916 offers approximately 10.6 to 32 seconds depending on the selected sampling rate. Consider the Direct Mode if fixed-duration messages are preferred over variable-length segments defined by address pins.

Part Context

The ISD1916SYI belongs to the ISD1900 series, which includes variants like ISD1932 and ISD1964 offering larger memory capacities. These devices share the same pinout and operational principles but differ in total recording time. The series is designed for cost-effective voice applications where low power consumption and ease of integration are primary requirements.

Replacement Considerations

The ISD1932SYI and ISD1964SYI are compatible alternatives within the same series, providing longer recording durations while maintaining identical pin configurations and operational modes. Verify that the increased memory capacity does not impact the physical footprint or power requirements of the existing design.