TS419IDT

Overview

The TS419IDT is a monaural audio power amplifier manufactured by STMicroelectronics, designed to drive 16 or 32-ohm earpieces or receiver speakers in BTL mode. It operates from a supply voltage of 2V to 5.5V and delivers up to 367mW into a 16-ohm load at 5V with 10% THD+N. The device features an externally controlled standby mode that reduces supply current to 10nA typical. It includes short-circuit limitation and ON/OFF click reduction circuitry.

Feature Summary

• Operates in BTL mode to eliminate bulky output capacitors
• Features externally controlled standby mode for low power consumption
• Includes integrated short-circuit limitation protection
• Incorporates ON/OFF click reduction circuitry

Applications

• 16/32 ohms earpiece or receiver speaker driver
• Mobile and cordless phones (analog / digital)
• PDAs & computers
• Portable appliances

Procurement Notes

Verify the specific ordering suffix 'DT' indicates tape and reel packaging for the SO8 package. Confirm the component status as obsolete or end-of-life before finalizing procurement plans. Ensure compatibility with existing gain-setting resistor configurations if using the external gain version rather than fixed gain variants.

Selection Notes

Select this component for applications requiring a single-channel Class-AB amplifier with low voltage operation down to 2V. Consider the BTL configuration benefits for removing large output capacitors. Verify that the required standby control logic matches the active-high requirement of the TS419 variant.

Part Context

The TS419IDT belongs to the TS419/TS421 family of mono audio amplifiers. While the TS419 uses an active-high standby signal, the TS421 utilizes an active-low standby signal. Both share identical electrical characteristics and are available in SO8, MiniSO8, and DFN packages.

Replacement Considerations

Public confirmed substitute part numbers include LM4889MA/NOPB and LM4889MAX/NOPB from Texas Instruments.