ISD5104X

Overview

The ISD5104X is a single-chip voice record/playback device from the ISD5100 ChipCorder series, providing 2 to 4 minutes of recording duration. It features up to 1 Mb of storage capacity for dual analog and digital data. The device operates on a supply voltage of +2.7V to +3.3V and supports 2.0V and 3.0V interface logic. It utilizes an I2C serial interface for control and data transfer, with typical operating currents of 15 mA during playback and 30 mA during recording. Standby current is typically 1 µA. The unit includes integrated automatic gain control, a power amplifier, and volume control.

Feature Summary

• Integrated single-chip solution combining analog and digital memory storage without external components.
• Supports full-duplex conversation recording and simplex/duplex message playback via configurable audio paths.
• Features programmable sampling rates (4.0, 5.3, 6.4, or 8.0 kHz) to balance voice quality and duration.
• Includes built-in automatic gain control, speaker driver, and volume control for direct microphone and speaker interfacing.

Applications

• Cellular phone answering machines and private call screening
• Automotive communication systems and GPS navigation messaging
• Portable devices requiring low-power voice memo recording

Procurement Notes

Verify the specific suffix 'X' against the manufacturer's official documentation to confirm package type and temperature grade. Ensure the I2C address pins A1 and A0 are configured correctly for the target system bus. Confirm that the host microcontroller supports the required I2C protocol speeds for reliable command execution.

Selection Notes

Select this model when a recording duration between 2 and 4 minutes is required. Choose based on the need for simultaneous analog voice and digital data storage within the same memory array. Consider the industrial temperature range availability if operating in harsh environments. Verify that the 2.7V to 3.3V supply voltage aligns with the system power architecture.

Part Context

The ISD5104X belongs to the ISD5100 ChipCorder series, which enhances the previous ISD5000 architecture by integrating I2C control and digital data storage capabilities. This series eliminates the need for compression algorithms by storing voice signals directly into solid-state flash memory. The family shares common pinouts and control registers across different duration variants.

Replacement Considerations

ISD5104: Standard commercial/industrial variant with identical electrical specifications but potentially different packaging or temperature rating.

FAQ

How is the recording duration determined?

Duration is determined by the selected sampling frequency. For the ISD5104, durations range from 2 to 4 minutes depending on whether 8.0 kHz, 6.4 kHz, 5.3 kHz, or 4.0 kHz sampling rates are used.

Can the device store digital data alongside voice?

Yes, the memory array can be allocated for both analog and digital storage. Digital data such as phone numbers or configuration parameters can be stored in unused memory pages.

What is the typical retention time for stored messages?

Messages are retained for up to 100 years typically without power due to the nonvolatile flash memory technology used.