TS421IQT

Overview

The TS421IQT is a Class-AB mono audio amplifier manufactured by STMicroelectronics, housed in an 8-pin DFN EP package. It delivers 367 mW of output power into a 32 Ohm load with a THD+N of 0.2%. Operating on a single supply voltage ranging from 2 V to 5.5 V, the device draws 1.8 mA of quiescent current and features a gain-bandwidth product of 1.1 MHz. It supports a wide operating temperature range from -40°C to +85°C.

Feature Summary

• Operates in BTL mode to drive earpieces or receiver speakers
• Includes standby mode for power management
• Single-channel mono architecture

Applications

• Driving 16 ohm earpieces
• Driving 32 ohm earpieces
• Driving 16 ohm receiver speakers
• Driving 32 ohm receiver speakers

Procurement Notes

Verify the component authenticity through official STMicroelectronics channels or authorized distributors. Confirm the specific ordering suffix matches the required tape and reel configuration. Ensure the datasheet version aligns with your design requirements before finalizing procurement decisions.

Selection Notes

Select this component for applications requiring a compact mono audio solution with low power consumption. The 8-pin DFN package suits space-constrained designs. Verify that the 367 mW output capability meets the impedance and volume requirements of the target speaker or earpiece.

Part Context

This part belongs to the TS421 series of audio amplifiers. It is designed as a low-power solution for portable devices. The series typically includes variants optimized for different packaging and thermal performance needs within the same functional family.

Replacement Considerations

Check for direct pin-compatible alternatives within the TS419/TS421 family. Verify electrical parameters such as output power and supply voltage ranges against existing design constraints before substituting.