ISD25120P

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The ISD25120P is a single-chip voice record/playback IC designed for low-cost voice record/playback systems. It is designed for applications requiring a single chip approach to record/playback audio signals. It is designed for use in voice recognition systems, voice prompts, remote control units, and many other applications. The device is comprised of an integrate A/D converter, D/A converter, an 8-bit digital processor, and related circuitry.

ISD25120P utilizes flash memory which provides a non-volatile environment for stable, reliable and secure play/record performance. It has a total capacity of 32K bits of flash memory, allowing it to store up to 15.5 seconds of voice at 8kHz, or 31 seconds of voice at 4.5kHz. There is also a 512 bit static RAM for buffering and data storage. The ISD25120P also has power down and wake-up modes for low-power operation.

The ISD25120P contains an on-board microphone amplifier, allowing it to capture audio signals from a microphone. The device also features a programmable gain control, allowing it to adjust the gain to accommodate the input audio signal. Additionally, the device has external microphone and speaker interfaces, allowing it to be integrated into in external audio systems. Furthermore, the ISD25120P has an integrated playback amplifier, allowing it to be integrated into external audio systems without the need for an additional amplifier.

The ISD25120P is programmed using command codes and data sent to the command port of the device. The ISD25120P supports a serial interface with both 4-bit and 8-bit data transfers. The 4-bit transfers allow for fast data entry and execution, while the 8-bit transfers allow for more flexibility and capability. The ISD25120P supports both synchronous and asynchronous modes for the serial interface.

The ISD25120P has an integrated A/D converter, enabling it to digitize audio signals from either a microphone or an external audio source. The device has a programmable gain control and a low-noise microphone amplifier, ensuring that the audio signals are accurately digitized for playback. The device also has an integrated D/A converter, allowing it to replay the audio signals without the need for an external amplifier.

The ISD25120P contains multiple record, play, and loop modes, allowing it to be used for various applications. It supports erase, record, and playback of multiple audio segments. It can store up to 15.5 seconds of voice at 8kHz, or31 seconds of voice at 4.5kHz. Furthermore, the device supports looping modes, allowing it to continuously play audio without the need for user intervention.

In terms of applications, the ISD25120P can be used for voice prompts, voice recognition, remote control systems, and much more. It is well-suited for use in low-cost, low-power and embedded systems. It is also ideal for use in audio equipment with limited space, such as portable audio players, voice recorders, and cellular phones. The device is designed for highly reliable and stable operation in noisy environments, making it ideal for use in harsh conditions.

The ISD25120P is ideal for use in interface-voice record and playback applications. It has an integrated A/D and D/A converters, allowing it to digitize and playback audio signals without the need for additional external components. It also has an onboard microphone amplifier and a programmable gain control, allowing it to capture and replay audio signals with the highest quality. Furthermore, it has multiple record, playback and loop modes, allowing it to be used for various applications. Its small size, low-power requirements, and highly reliable operation make it an excellent choice for voice record and playback systems.

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