TS421IDT

$1.01

Description：IC AMP CLASS AB MONO 367MW 8SO
Series：-
Mfr：STMicroelectronics
Package：Tape & Reel (TR),Cut Tape (CT)

SKU:3acc812f48c1 Category: Audio Amplifiers Brand: STMicroelectronics

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Product introduction

Product Detailed Parameters

Description：IC AMP CLASS AB MONO 367MW 8SO
Series：-
Mfr：STMicroelectronics
Package：Tape & Reel (TR),Cut Tape (CT)
Type：Class AB
Output Type：1-Channel (Mono)
Max Output Power x Channels @ Load：367mW x 1 @ 16Ohm
Voltage - Supply：2V ~ 5.5V
Features：Differential Inputs, Short-Circuit Protection, Standby
Mounting Type：Surface Mount
Supplier Device Package：8-SOIC
Package / Case：8-SOIC (0.154", 3.90mm Width)
Operating Temperature：-40°C ~ 85°C (TA)
Grade：-
Qualification：-

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TS421IDT

Overview

The TS421IDT is a monaural audio power amplifier manufactured by STMicroelectronics, designed for driving 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 active-low standby mode that reduces supply current to 10nA typical. Key electrical parameters include a maximum supply current of 2.5mA, a signal-to-noise ratio of 95dB(A) at 5V, and a power supply rejection ratio of 56dB typical at 1kHz.

Feature Summary

Eliminates bulky output capacitors through bridge-tied load (BTL) configuration
Externally controlled standby mode significantly reduces supply current consumption
Includes ON/OFF click reduction circuitry for improved user experience
Provides short-circuit limitation for enhanced reliability

Applications

Mobile and cordless phones (analog / digital)
PDAs & computers
Portable appliances

Procurement Notes

Verify component authenticity and datasheet alignment before integration. Confirm the specific package variant matches design requirements. Check for end-of-life status as availability may be limited. Ensure environmental compliance documentation is obtained. Validate pin connections against official schematics.

Selection Notes

Select this component for low-voltage mono audio applications requiring high efficiency. Consider the active-low standby control logic when designing interface circuits. Evaluate thermal dissipation characteristics relative to the chosen PCB layout. Verify gain setting resistor configurations if using the variable gain version.

Part Context

This part belongs to the TS419/TS421 family of 360mW mono amplifiers. The TS421 variant specifically utilizes an active-low standby signal, whereas the TS419 uses an active-high signal. Both share identical electrical performance and packaging options including SO8, MiniSO8, and DFN 3x3.