ISD1416S

Overview

The ISD1416S 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 (4.5V to 5.5V) and utilizes Multi-Level Storage (MLS) technology for non-volatile memory. The device features an internal sampling frequency of 8.0 kHz with a filter passband of 3.3 kHz. Key electrical parameters include a typical standby current of 1 µA, operating current of 30 mA, and speaker output power of 12.2 mW into a 16 Ω load. It supports edge- or level-activated playback, automatic power-down, and fully addressable multiple messages.

Feature Summary

• Direct analog storage using patented Multi-Level Storage (MLS) technology for natural voice reproduction without digitization.
• Automatic power-down mode that returns the device to low-power standby after record or playback cycles.
• Fully addressable architecture allowing for multiple message handling via external address pins.
• Integrated microphone preamplifier with Automatic Gain Control (AGC) and direct drive capability for speakers.

Applications

• Short-duration messaging systems
• Voice prompts in consumer electronics
• Security alarm announcements
• Industrial control audio feedback

Procurement Notes

Verify the manufacturer origin, as the ISD1400 series was originally developed by Winbond. Confirm the specific package type (SOIC or PDIP) and temperature grade (Commercial or Industrial) required for the application. Ensure the ordering suffix matches the desired lead-free status and packaging format. Cross-reference the datasheet revision to confirm pin compatibility and electrical specifications.

Selection Notes

Select the ISD1416S when a fixed 16-second recording duration at 8.0 kHz sampling rate is required. Choose this part over the ISD1420 if shorter message lengths are sufficient. Consider the industrial temperature range (-40°C to 85°C) if operating in harsh environments. Verify that the single +5V supply constraint fits the system power design. Evaluate the need for external clocking via XCLK if precise timing stability beyond the internal oscillator tolerance is necessary.

Part Context

The ISD1416S belongs to the ISD1400 ChipCorder series, which provides single-chip solutions for short-duration voice applications. This series distinguishes itself by storing voice signals directly in non-volatile memory cells, eliminating the need for compression algorithms. The family includes variants like the ISD1420 for longer durations and supports both standalone push-button operation and microcontroller-controlled addressing.

Replacement Considerations

The ISD1420 is a compatible alternative within the same series, offering 20 seconds of duration at a 6.4 kHz sampling rate. Both parts share identical pinouts and operational modes. For upgraded functionality requiring digital processing or longer durations, consider the Nuvoton ISD1900 or ISD1700 series, though these require different interface configurations.

FAQ

How does the ISD1416S handle message retention?

The device uses non-volatile Multi-Level Storage (MLS) technology, which retains recorded messages for up to 100 years typically without power.

Can the ISD1416S be used for multiple messages?

Yes, the device is fully addressable with 160 distinct segments, allowing for multiple message recording and playback via the A0-A7 address pins.

What is the minimum speaker impedance supported?

The SP+ and SP- pins can directly drive loudspeakers with impedances as low as 16 Ω.