SRC4193IDBR

Audio Special Purpose Overview

The SRC4193IDBR is a stereo asynchronous sample-rate converter (ASRC) from Texas Instruments, housed in a 28-pin SSOP package. It supports input and output sampling rates up to 212 kHz with an automatic sensing range of 16:1 to 1:16. Key electrical specifications include a dynamic range of 144 dB and total harmonic distortion plus noise (THD+N) of –140 dB. The device operates on a single 3.3-V supply (VDD) with a flexible digital I/O supply (VIO) ranging from 1.65 V to 3.6 V. Configuration is managed via a serial peripheral interface (SPI) port.

Audio Special Purpose Feature Summary

• Software-controlled configuration via SPI port for internal registers
• Flexible audio serial ports supporting I2S, Left-Justified, Right-Justified, and TDM formats
• Programmable digital output attenuation with 256 steps (0 dB to –127.5 dB)
• Direct downsampling option for decimation filter

Audio Special Purpose Applications

• Digital mixing consoles
• Broadcast studio equipment
• High-end A/V receivers

Audio Special Purpose Procurement Notes

Verify the 'R' suffix indicates tape-and-reel packaging when ordering. Confirm that the VIO supply voltage aligns with the target system logic levels, as it ranges from 1.65 V to 3.6 V independently of the 3.3 V core supply. Ensure the design accommodates the 28-pin SSOP thermal characteristics.

Audio Special Purpose Selection Notes

Select the SRC4193IDBR over the SRC4192IDB if software control via SPI is required for mode, format, and attenuation settings. The IDBR variant offers the same pinout and performance as the tube-packaged IDB but in reel form for automated assembly. Verify compatibility with the SRC4192EVM development kit if prototyping.

Audio Special Purpose Part Context

The SRC4193 is part of the SRC419x family, designed for professional and broadcast audio. It shares the same high-performance digital filtering and jitter attenuation capabilities as the SRC4192. The primary distinction is the control interface: the SRC4193 uses an SPI port for programmability, whereas the SRC4192 relies on hardware pins for configuration.

Audio Special Purpose Replacement Considerations

The SRC4192IDB is a pin-compatible alternative but lacks SPI control. The SRC4192IDBR is the reel-packaged version of the pin-compatible model. No other direct substitutes are documented.