Description

The TDA9840T is a stereo/dual sound processor designed for TV and VTR sets. It uses internal digital PLL technique with an extremely small bandwidth and synchronous detection to ensure safe operation. Its switching time is maximum 2.3s and identification concerns the main functions.

Specifications and features

• Product Category: IC Chips
• Supply voltage: 5 to 8 V
• De-emphasis
• Source selector
• Level and stereo matrix adjustment possible via the I2C-bus
• I2C-bus transceiver
• AF inputs for NICAM or AM sound (standard L)
• AF outputs for Main and SCART
• AF input and output signals selectable via the I2C-bus
• Information for identified transmission mode is readable via I2C-bus
• Software is compatible with the TDA8415/16/17
• Quartz oscillator and clock generator
• Three digital PLL, alignment-free
• Two digital integrators, alignment-free
• Stabilizer circuit for ripple rejection and constant output signals
• ESD protection of all pins

Application Scenarios

The TDA9840T is commonly used in TV and VTR sets to enhance sound quality and ensure safe operation.

Comparison

• Small bandwidth for safe operation
• Alignment-free digital PLL and integrators for easy alignment
• Information for identified transmission mode is readable via the I2C-bus
• Compatible software with TDA8415/16/17

• Supply voltage range is limited to 5 to 8 V