ISD1112S

Overview

The ISD1112S is a single-chip voice record and playback device from the ISD1100 series, manufactured by Nuvoton Technology Corporation. It provides a 12-second recording duration with a typical sampling frequency of 5.3 kHz and a filter pass band of 2.2 kHz. The component operates on a single +4.5V to +5.5V supply voltage and supports a commercial temperature range of 0°C to 70°C. It features an on-chip oscillator, microphone preamplifier with automatic gain control, and nonvolatile memory for zero-power message storage. The device utilizes push-button interfaces for edge- or level-activated playback and includes fully addressable inputs for multiple message handling.

Feature Summary

• Single-chip solution with patented Multi-Level Storage (MLS) technology for high-quality natural voice reproduction without synthetic effects.
• Zero-power message storage capability that eliminates the need for battery backup circuits.
• Flexible addressing system allowing for multiple message applications and built-in looping functionality.
• Automatic power-down mode that enters standby with minimal current consumption following operations.

Applications

• Voice messaging systems requiring simple push-button operation
• Toy and gift market audio modules
• Industrial announcement devices

Procurement Notes

Verify the specific package type and manufacturer origin, as the ISD1100 series has been produced by both Winbond and Nuvoton. Confirm the exact suffix 'S' corresponds to the SOIC-28 package in the specific datasheet revision being referenced. Check for end-of-life status or availability of alternative packages such as PDIP or die form if required for the design.

Selection Notes

Select the ISD1112S when a 12-second recording duration is required, distinguishing it from the 10-second ISD1110 variant. Ensure the application environment stays within the commercial temperature range of 0°C to 70°C. Consider the external clock pin if precise timing stability beyond the internal oscillator's variation is necessary for the specific system requirements.

Part Context

The ISD1112S belongs to the ISD1100 series of ChipCorder devices, which are designed for low-cost, single-chip voice recording solutions. This series is characterized by its use of EEPROM-based nonvolatile memory and direct voice signal storage. The S suffix typically denotes the Small Outline Integrated Circuit (SOIC) package format, providing a surface-mount option compared to the through-hole PDIP variants.

Replacement Considerations

The ISD1810 is a documented replacement model for the ISD1100 series, specifically targeting similar markets like toys and announcements. Verify compatibility regarding pinout and electrical characteristics before substitution.

FAQ

How does the ISD1112S handle multiple messages?

The device uses address inputs A0-A7 to handle multiple messages. By setting specific levels on these pins, different start addresses can be defined for record or playback cycles, allowing for complex messaging sequences.

What is the function of the RECLED pin?

The RECLED pin outputs a LOW signal during a record cycle to indicate recording is in progress. It also pulses LOW momentarily during playback to signal the detection of an End-of-Message (EOM) marker.

Can the ISD1112S loop a message continuously?

Yes, the device has a built-in looping function. By holding pins A3, A6, and A7 HIGH simultaneously and initiating playback via PLAYE, the device will continuously repeat the message until PLAYL is pulsed LOW.