ISD2540S

Product Overview

Category

ISD2540S belongs to the category of integrated circuit (IC) audio record/playback devices.

Use

The ISD2540S is primarily used for recording and playback of audio signals in various electronic applications.

Characteristics

• Compact size and low power consumption
• High-quality audio recording and playback capabilities
• Easy integration into electronic circuits
• Wide operating voltage range
• Non-volatile storage of recorded audio data

Package

The ISD2540S is available in a standard 28-pin plastic dual inline package (DIP).

Essence

The essence of ISD2540S lies in its ability to provide reliable and efficient audio recording and playback functionality in electronic devices.

Packaging/Quantity

The ISD2540S is typically packaged in reels or tubes, with quantities varying depending on the manufacturer's specifications.

Specifications

• Operating Voltage: 2.4V to 5.5V
• Recording Time: Up to 40 seconds
• Sampling Frequency: 8 kHz
• Audio Output: Mono
• Storage Medium: Non-volatile EEPROM

Detailed Pin Configuration

1. VDD - Power supply voltage
2. VSS - Ground reference
3. REC - Record control input
4. PLAYE - Playback enable control input
5. PLAYL - Playback LED output
6. SPK+ - Speaker positive terminal
7. SPK- - Speaker negative terminal
8. MIC - Microphone input
9. OSC - Oscillator input
10. OSC - Oscillator output
11. NC - No connection
12. NC - No connection
13. NC - No connection
14. NC - No connection
15. NC - No connection
16. NC - No connection
17. NC - No connection
18. NC - No connection
19. NC - No connection
20. NC - No connection
21. NC - No connection
22. NC - No connection
23. NC - No connection
24. NC - No connection
25. NC - No connection
26. NC - No connection
27. NC - No connection
28. NC - No connection

Functional Features

• Simple control interface for recording and playback operations
• Automatic power-down mode for power saving
• Built-in audio amplifier for direct speaker connection
• External microphone input for versatile recording options
• LED indicator for playback status feedback

Advantages and Disadvantages

Advantages

• Compact size allows for easy integration into electronic devices
• Low power consumption prolongs battery life in portable applications
• Non-volatile storage ensures data retention even during power loss
• High-quality audio recording and playback capabilities enhance user experience

Disadvantages

• Limited recording time of up to 40 seconds may not be sufficient for certain applications
• Mono audio output restricts stereo sound reproduction

Working Principles

The ISD2540S utilizes an internal analog-to-digital converter (ADC) to convert incoming audio signals into digital format for storage in its non-volatile EEPROM. During playback, the stored digital audio data is converted back to analog signals using a digital-to-analog converter (DAC) and amplified before being output to a speaker or audio output device.

Detailed Application Field Plans

The ISD2540S finds application in various electronic devices, including: 1. Voice recorders 2. Toys with audio playback functionality 3. Security systems with voice prompts 4. Medical devices requiring audio feedback 5. Automotive electronics for voice alerts

Alternative Models

1. ISD2560S: Similar to ISD2540S but with extended recording time of up to 60 seconds.
2. ISD2520S: Compact version with reduced pin count and recording time of up to 20 seconds.
3. ISD25120S: High-capacity model with recording time of up to 120 seconds.

Note: The above alternative models are provided as examples and may vary depending on the manufacturer.

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