ISD5008P

Overview

The ISD5008P is a single-chip voice record and playback device from Nuvoton Technology Corporation, designed for seamless integration into digital cellular phones, automotive communications, GPS systems, and portable devices. It provides 4 to 8 minutes of voice storage duration depending on the selected sampling frequency. The device operates on a single +3V supply with low power consumption, featuring standby current as low as 1 µA. Key electrical parameters include operating currents of 15 mA (typical) during playback, 25 mA (typical) during recording, and 12 mA (typical) in feedthrough mode. It utilizes patented multilevel storage technology for nonvolatile memory retention.

Feature Summary

• Fully integrated single-chip solution incorporating sampling clock, anti-aliasing and smoothing filters, and multi-level storage array.
• Integrated analog features including automatic gain control (AGC), speaker driver, summing amplifiers, volume control, and AUX IN/AUX OUT interface.
• Supports one-way and two-way full-duplex conversation recording and playback via software-configurable sample rates.
• Utilizes on-chip nonvolatile memory for zero-power message storage with high retention and re-record cycles.

Applications

• Digital cellular phones (GSM, CDMA, TDMA, PDC, PHS)
• Automotive communications and car kits
• GPS and navigation systems
• Portable communication products

Procurement Notes

Verify the specific package type and temperature grade required for your application, as the ISD5008 series offers options including die form, PDIP, SOIC, TSOP, and chip scale packaging. Confirm that the extended temperature (-20 to +70°C) or industrial temperature (-40 to +85°C) versions are available if your design environment demands it. Ensure compatibility with the microcontroller-based SPI bus interface for address, control, and duration selection functions.

Selection Notes

Select the appropriate sampling rate based on the desired balance between sound quality and recording duration. Higher sampling frequencies provide better speech quality but reduce total storage time. The device supports 4.0, 5.3, 6.4, and 8.0 kHz rates, corresponding to durations of 8, 6, 5, and 4 minutes respectively. Consider the power consumption requirements for each operational mode, as individual stages can be powered down to minimize energy usage in battery-operated applications.

Part Context

The ISD5008 is part of the ChipCorder product line, which focuses on fully integrated voice record/playback solutions. It leverages ISD's patented multilevel storage technology to store voice signals directly into solid-state memory without compression. This approach ensures superior voice and music reproduction compared to compressed digital solutions. The device is designed for easy integration with microprocessors or microcontrollers via a standard serial interface.

Replacement Considerations

Check for updated revisions within the ISD5008 series or alternative models in the ChipCorder family that may offer different package options or temperature ranges. Verify pinout compatibility and SPI interface protocol if substituting with other single-chip voice recorders. Ensure that any replacement component supports the required voltage range and power consumption specifications for your specific application.