PT2258 6-Channel Electronic Volume Controller IC

PT2258 is a 6-channel CMOS-based electronic volume controller IC created specifically for the next generation of AV multi-channel audio systems. The PT2258 IC communicates through an I2C Control Interface and features a 0 to -79dB at 1dB/step attenuation range, low noise, and good channel separation. PT2258 6-Channel Electronic Volume Controller IC (DIP or SOP) has 20 pins. The pin assignments and application circuit for this volume controller IC have been improved for ease of PCB layout and cost savings.

Data is sent to and from the CPU to the PT2258 through the SDA and SCL of this IC. The BUS Interface’s SDA and SCL functions. The pull-up resistors should be linked to the positive supply voltage as much as possible.

Data Validation 

• When the SCL signal is HIGH, the data on the SDA channel is deemed stable.
• The HIGH and LOW states of the SDA line changes only when the SCL is LOW.

Start and Stop Condition 

A Start Condition is activated when

1.  The SCL set to HIGH and
2. SDA shifts from HIGH to LOW State.

The Stop Condition is activated when

1. SCL set to HIGH and
2. SDA shifts from LOW to HIGH State

To increase and reduce loudness, all audio amplifiers require a mechanism. Mechanical pieces, such as a potentiometer, are used in the majority of such devices. Furthermore, this electrical Volume Controller IC is commonly utilised to produce a digitally controlled audio controller. This is a very basic gadget IC that is used to regulate the audio output from an amplifier electronically.

APPLICATIONS:

• AV Surround Audio Equipment
• Car Audio
• Mini Compo
• Computer Multi-Media Speaker
• Other Audio types of equipment