The UPD7759C is a speech synthesizer LSI manufactured by NEC. It's designed to generate speech from stored digital data, commonly used in various electronic devices requiring voice output. This chip utilizes a sophisticated speech synthesis algorithm to create natural-sounding speech from a relatively small amount of data.

Applications

• Electronic toys and games
• Automotive navigation systems
• Industrial control systems
• Voice messaging systems
• Consumer electronics devices

Features

• Speech synthesis from stored data
• Low power consumption
• Compact size
• External ROM interface for voice data storage
• Programmable parameters for voice customization

Benefits

• Provides voice output capability to electronic devices
• Reduces system cost compared to discrete speech synthesis solutions
• Simplifies design and development of voice-enabled products
• Enables natural-sounding speech with minimal data storage
• Extends battery life in portable applications

Additional Details

The UPD7759C typically interfaces with an external ROM chip where the speech data is stored. The chip reads the data from the ROM and processes it to generate the corresponding speech output. It includes programmable parameters that allow developers to adjust the voice characteristics, such as pitch, speed, and volume. The operating voltage and clock frequency requirements vary depending on the specific model and application. The output can be directly connected to an audio amplifier and speaker.

This speech synthesizer is ideal for adding voice capabilities to a wide range of electronic devices, from simple toys to sophisticated industrial control systems. Its low power consumption and compact size make it particularly well-suited for portable and space-constrained applications.