Ultra-Low-Power Audio Codec + Headphone Amp + Stereo Speaker Amp + Analog / Digital Mic Input

The TSCS42xx are low-power, high-fidelity integrated CODECs targeted at portable applications such as Bluetooth® applications, tablet computers, personal navigation devices, portable projectors, speaker docks, etc. The devices have been designed with rapid customization in mind. TSI is able to rapidly provide varying levels of integration, additional audio processing, etc., according to the needs of large markets or customers. Contact TSI with your clock programming requirements.


  • Incredible 124dB SNR
  • High-fidelity 32-bit stereo CODEC
  • 24-bands of fully configurable Parametric EQ (Peaking Filters)
    • Implemented as configurable BiQuads
    • Alternative filter types available: HPF, LPF, BPF, APF
  • Multiband Compressor / Limiter / Expander
  • Wideband DRC
  • 3D Stereo Enhancement
  • Psychoacoustic Bass Enhancement
  • High-frequency restoration for compressed audio content
  • Headphone Jack detection
  • Integrated, ground-referenced, capless headphone driver
    • Up to 35mW into 16 Ohms, < 1% THD+N
  • Two flexible I2S / LJ / RJ digital audio interfaces
  • Bluetooth™ PCM input compatibility
  • Three single-ended  analog microphone / line-in interfaces with supplied mic bias
  • Differential analog microphone / line-in interface with supplied mic bias
  • Stereo digital microphone interface
  • Ultra-low power consumption with integrated power management
  • Filterless Stereo DDX™ Amplifier Technology
  • 3W/Channel (4Ω) Stereo Class-D Digital Speaker Driver
  • 2-wire (I2C compatible) control interface
  • 48-pin 7x7mm QFN package
  • Commercial Temp (0C-70C) and Industrial Temp (-40C – 85C) Offerings

Product Specification

Interfaces DAC Mono Channels (#) ADC Mono Channels (#) Analog Supply Voltage (V) Prog. Clock Clock Support Stereo
Headphone Amps
Spkr. Amp Type Analog Mic Support, Digital Mic Support Low Power Mode Advanced Features
1 x I2C,
2 x I2S / LJ / RJ
2 2 1.8 Yes  XTAL /CLK In, ACLK 1 Capless Stereo Class-DDX 2, 2 Yes
  • 12-Band Stereo PEQ
  • Wideband DRC (Compressor / Limiter / Expander)
  • Pro-style Multiband Compressor / Limiter
  • 3D Stereo Enhancement
  • Psychoacoustic Bass Enhancement
  • Compressed Audio High-Frequency Restoration


Title Type Format File Size Post Date File Date / Version
 TSCS42xx Reference Schematic Reference Schematic PDF 80 kB 01-23-17 01-18-17, Rev B
 TSCS42xx Sample Code Sample Code PDF 382 kB 01-04-16 07-16-15
 TSCS42xx Product Brief Product Brief PDF 161 kB 04-13-17 v1.2
 TSCS42xx Data Sheet Data Sheet PDF 1.2 MB 10-27-20 v1.8
 AN02: Configuring Audio Processing Algorithms using the Audio System Configurator (ASC) Tool App Note PDF 1.5 MB 06-07-17 06-07-2017, v1.0
 TSI42A2-RPIHAT-A Raspberry Pi HAT Evaluation Board Product Brief PDF 431 kB 09-25-18 v0.5

Software Support

Title Type Format File Size Post Date File Date / Version
Tempo ASC Tuning Tool Windows-based GUI Application EXE (Zipped) 851kB 05-11-17 05-08-17 / ASC_0509
Tempo ASC Release Notes Windows-based GUI App Release Notes Text 16kB 05-11-17 05-08-17
Linux Drivers for TSCS42xx / TSCS42xx Audio HAT Board Source Code C, H N/A N/A See GitHub. Note: Mainlined into 4.16