Looking for a 1-minute voice chip that allows self-downloading and sound replacement?

 Looking for a 1-minute voice chip that allows self-downloading and sound replacement?

If you're looking for a voice/audio playback chip with around 1 minute of storage, and you need to be able to download and replace the audio content yourself, then OTP-type chips (One-Time Programmable) on the market are not suitable. You'll need to use a Flash-type voice chip instead.

In this case, we recommend the KT148A (SOP8 package) voice chip, which can directly drive a 0.5W speaker. You can refer to the minimum system circuit for detailed hardware design.

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🔹 Key Features of the KT148A Chip

  1. High Cost-Performance Ratio KT148A adopts an advanced manufacturing process, significantly reducing cost while supporting repeated reprogramming, which improves overall value.
  2. Large Storage Capacity Built-in 420 KBytes of voice memory, supporting up to 420 seconds of audio playback — suitable for various applications.
  3. Multiple Interface Options Provides I²C, SPI, and UART interfaces for flexible communication with microcontrollers or processors.
  4. Low Power Consumption Standby current is <20 μA, and power-down current is as low as 2 μA, making it ideal for battery-powered portable devices.
  5. Excellent Sound Quality Uses advanced audio processing technology to deliver clear, natural, and pleasant voice output, suitable for a wide range of voice applications.
  6. High Flexibility Supports multiple audio formats, such as MP3 and WAV, to meet different application needs.
  7. User-Configurable Voice Content Users can easily replace the voice files via the serial port connection to a PC, without the need for expensive tools.
  8. Versatile Applications Supports voice playback, recognition, and synthesis, making it suitable for smart home devices, voice assistants, and various embedded products.

These features make the KT148A chip highly suitable for use in smart home devices, game consoles, voice broadcast systems, and more.

The audio file download process is performed via UART serial connection — detailed instructions can be found in the documentation package.

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As for pricing, you can search for “KT148A” on AliExpress to see current market prices.

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KT148A Voice Chip Issue: Difficult to Play with Code Sending - Normal Playback After Grounding Pin 4, What’s the Reason?

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Problem Description: Hello, we’ve encountered an issue and would appreciate your support: With the KT148A chip, after powering on, sending the code rarely triggers playback. However, if we use tweezers to briefly short Pin 4 (PB0) to ground and then send the code again, playback works normally. What could be causing this? Based on the observed behavior, it’s highly likely an issue with the timing of one-wire communication,  particularly with the start signal, which may be too short.  Let’s analyze this in detail and review the KT148A schematic as follows: 1. Pin 4 (PB0) of the Chip: PB0 is a test pin with the default factory function of triggering wake-up and playback when grounded. 2. Customer Description: When the customer uses tweezers to short PB0 (Pin 4) to ground, it follows this principle. The shorting action actually performs two operations: Action 1: The KT148A detects a falling edge signal, wakes up, exits low-power mode, and enters full-speed operation. Action 2: Th...
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