ISD2548SY

Series:	ChipCorder®
Part Status:	Obsolete
Lead Free Status / RoHS Status:	--
Interface:	Pushbutton
Moisture Sensitivity Level (MSL):	--
Input Signal:	Analog - Single Ended, Microphone
Output Signal:	PWM Speaker Output
Sampling Frequency:	5.3kHz
Duration:	48 Sec
Filter Pass Band:	2.3kHz
Messaging:	Multiple
Oscillator Type:	Internal/External
Features:	Automatic Gain Control
Operating Temperature:	0°C ~ 70°C (TA)
Voltage - Supply:	4.5V ~ 6.5V
Mounting Type:	Surface Mount
Package / Case:	28-SOIC (0.295", 7.50mm Width)
Supplier Device Package:	28-SOIC

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Introduction

ISD2548SY is an integrated circuit (IC) chip designed by ISD, a leading provider of embedded communications and digital signal processing products. The chip was specifically designed for voice-based applications, including voice record and playback. This document outlines the application field and working principle behind ISD2548SY device.

Application Field

ISD2548SY is widely used in applications that require a reliable and easy-to-use audio record and playback system. The device is suitable for a wide range of applications, including:• Surveillance systems• Security alarms• Voice response systems• Automated voice mail systems• Voice over IP (VoIP) systems• Interactive voice response (IVR) systems• Portable medical devices• Automotive infotainment• Industrial control systems

Working Principle

To use ISD2548SY, an external microcontroller or optional memory management chips (EEPROM or Flash) is necessary for data storage and command control. The device is capable of recording, playing back, and manipulating 16-bit digital audio data stored in a serial EEPROM or Flash memory.The ISD2548SY utilizes a Frequency Hopping Spread Spectrum (FHSS) control protocol to ensure digital security and transmission reliability. The FHSS protocol consists of frequency hopping sequences, time-division code words, and synchronization code words. These sequences enable the device to locally hop across multiple frequencies, thus providing an extra layer of security for the user’s data and voice recordings. The device is designed for seamless integration with external hardware and software. It supports serial-interface commands and follow the SPI protocol to process audio data. It provides a serial interface for the microcontroller, allowing the user to read or write data to or from the device.The device features a low-noise output amplifier, which enables the user to enjoy clear and loud audio while recording or playing back audio data. In addition, it features built-in audio mixing and mixing mute functions, enabling the user to mix multiple audio signals and prevent noise interference.

Conclusion

The ISD2548SY is an ideal option for applications requiring a reliable and easy-to-use record and playback system. Its Frequency Hopping Spread Spectrum (FHSS) control protocol provides an extra layer of security for the user’s data and voice recordings. Its low-noise output amplifier and built-in audio mixing and mixing mute functions ensure users enjoy clear and loud audio quality. Overall, the ISD2548SY device is an excellent choice for voice-based applications requiring seamless integration with external hardware and software.

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