PT2399 Audio Digital Processing Chip DIP-16

PT2399 Audio Digital Processing Chip DIP-16 is a highly popular, low-cost integrated circuit specifically designed to create high-quality echo and delay effects in audio systems. This chip employs a digital processing method using a built-in Analog-to-Digital Converter (ADC) and Digital-to-Analog Converter (DAC) with an internal RAM to manage the delay time. You control the delay duration easily by adjusting the resistance on the **Pin 6 (Digital Oscillator)**, offering remarkable flexibility from short chorus effects to long, atmospheric echoes. Because it requires minimal external components and operates reliably on a single power supply, the PT2399 is an ideal solution for hobbyists and professionals building guitar effect pedals, karaoke machines, and home audio systems that demand a rich, analog-sounding delay.

Key Features:

• Low Noise and Low Distortion: Provides clean audio processing that results in high-fidelity echo and delay effects.
• Adjustable Delay Time: Easily manipulate the delay duration by simply changing an external resistor value.
• Single Power Supply Operation: Operates efficiently with a single low-voltage power supply, simplifying circuit design.
• Internal ADC and DAC: Incorporates digital processing logic, ensuring stable and reliable delay management.
• Wide Application Range: Perfectly suited for both musical instrument effects and voice-based applications like karaoke.

Technical Specifications:

• Operating Voltage: 4.5 V to 5.5 V DC (Typically 5 V)
• Maximum Delay Time: ≈ 300 ms (Milliseconds, before significant noise accumulation)
• Supply Current (Operating): ≈ 25 mA to 40 mA
• Input ADC Resolution: 10-bit (Equivalent)
• Noise Voltage (V_NO): ≈ -90 dBV (Typical)

Mechanical Specifications:

• Package Type: DIP-16 (Dual In-line Package, 16-pin)
• Mounting: Through-Hole Technology (THT)
• Pin Pitch: 2.54 mm (Standard)

Dimensions:

• Length: ≈ 19.3 mm
• Width: ≈ 6.4 mm
• Height (Body): ≈ 3.3 mm
• Weight: ≈ 1.5 g

Pinout and Wiring:

• Pin 1 (Input): Connect the audio signal input to the ADC stage.
• Pin 2 (V_IN): Reference voltage input for the ADC.
• Pin 3 (C_VCO): Connects the VCO control voltage capacitor.
• Pin 4 (C_OUT): Output pin for the internal VCO capacitor.
• Pin 5 (V_DD): Positive power supply input (typically 5 V).
• Pin 6 (R_T): Connects the external resistor that sets the delay time.
• Pin 7-10: No Connect (NC) or reserved pins.
• Pin 11 (V_SS): Ground reference pin.
• Pin 12 (V_REF): Reference voltage output for external circuits.
• Pin 13 (C_FILT): Filter capacitor connection for the DAC.
• Pin 14 (C_OUT): Audio signal output from the DAC.
• Pin 15 (MUTE): Control pin for muting the output (usually tied to V_SS).
• Pin 16 (Output): Audio signal output, usually fed back for echo.

Datasheet Reference:

• Download PT2399 Audio Delay Chip Datasheet

Commonly Used in:

• Music Equipment Manufacturers: Used in the production of budget and boutique guitar delay pedals.
• Hobbyists and DIY Electronics: Ideal for building custom audio projects and prototype effects units.
• Audio Modification Communities: Employed to add echo/reverb functions to amplifiers and mixers.

Applications:

• Guitar Delay/Echo Pedals: Creating variable-length audio repeats for musical performance.
• Karaoke Echo Mixers: Generating the classic vocal echo effect.
• Reverb and Flanging Effects: Used as a core component for creating different types of spatial audio effects.

Equivalent Models:

• Coolaudio V3205/V3208 (BBD Chips): Analog Bucket Brigade Devices offering a more purely analog delay sound, but with higher component count.
• Digital Signal Processors (DSPs): Higher-cost, more complex chips providing longer delay times and greater audio fidelity for professional systems.
• Belton Brick Modules: Integrated delay circuits often based on similar principles, used for simplified reverb integration.

Package Includes:

• 1 x PT2399 Audio Digital Processing Chip DIP-16