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Product attributes Property Value
Manufacturer Nuvoton Technology Corporation
Product Series
Packaging Tube |
Part Status Active
Type Class AB
Output Type 1-Channel (Mono)
Max Output Power x Channels @ Load 2W x 1 @ 4Ohm; 1.4W x 1 @ 8Ohm
Voltage - Supply 2V ~ 6.8V
Features -
Mounting Type Surface Mount
Operating Temperature -40°C ~ 85°C
Grade -
Qualification -
Supplier Device Package 8-SOP
Package / Case 8-SOIC (0.154", 3.90mm Width)
ROHS RoHS Compliant - Hazardous Substance Free Electronic Components | HQICKEY

The ISD8104SYI is a mono Class AB audio amplifier from Nuvoton, delivering 2W into 4Ω or 1.4W into 8Ω. Operating from 2V to 6.8V, it provides low-distortion audio for portable speakers, intercoms, alarms, and radios. Housed in a standard 8-SOP (SOIC-8) package, it offers easy integration into battery-powered and line-powered designs, with reliable performance across -40°C to +85°C.

  • Wide Supply Voltage (2V-6.8V): Supports multiple battery configurations and regulated supplies.
  • Class AB Low Distortion: Delivers clean audio suitable for voice and music applications.
  • Standard SOIC-8 Package: Easy to solder and prototype, compatible with many PCB layouts.
  • Flexible Output Power: 2W into 4Ω or 1.4W into 8Ω for different speaker impedances.
  • Extended Temperature Range (-40°C to +85°C): Reliable in harsh environments.

Portable Bluetooth Speaker

The ISD8104SYI delivers 2W into 4Ω from a 5V supply, providing sufficient volume for compact Bluetooth speakers while maintaining Class AB audio quality.

Battery-Powered Intercom

With a wide 2V to 6.8V range, this amplifier can run on 2-4 AA batteries, making it ideal for door intercoms or baby monitors requiring reliable mono audio.

Alarm and Siren Driver

Its robust output and standard SOIC-8 package allow easy integration into security alarms, driving speakers for loud alerts with minimal external components.

Portable AM/FM Radio

The low distortion Class AB output ensures clear voice and music reproduction in pocket radios, operating from a single Li-ion cell or USB power.

DIY Audio Amplifier

Hobbyists can quickly prototype a mono amplifier using the ISD8104SYI due to its simple pinout and through-hole compatible SOIC-8 package.

Medical Alert Device

Its wide temperature range and low voltage operation make it suitable for portable medical alert systems that require audio feedback.

Q: What is the output power of the ISD8104SYI?
A: It delivers 2W into 4Ω or 1.4W into 8Ω, suitable for mono speaker applications.
Q: What is the supply voltage range?
A: The device operates from 2V to 6.8V, covering a wide range of battery and regulated supplies.
Q: What amplifier class does it use?
A: It is a mono Class AB amplifier, known for low distortion and simple design.
Q: What package is available?
A: It comes in an 8-SOP (SOIC-8) package, a standard surface-mount footprint.
Q: What are typical applications?
A: It is used in portable speakers, intercoms, alarms, and other battery-powered audio devices.
Base Product Number : ISD8104
2W Alarm Audio Amplifier Class AB ISD8104 Low Distortion Mono Nuvoton Portable Speaker SOIC-8 Surface Mount
Q: What is the output power of the ISD8104SYI?
A: It delivers 2W into 4Ω or 1.4W into 8Ω, suitable for mono speaker applications.
Q: What is the supply voltage range?
A: The device operates from 2V to 6.8V, covering a wide range of battery and regulated supplies.
Q: What amplifier class does it use?
A: It is a mono Class AB amplifier, known for low distortion and simple design.
Q: What package is available?
A: It comes in an 8-SOP (SOIC-8) package, a standard surface-mount footprint.
Q: What are typical applications?
A: It is used in portable speakers, intercoms, alarms, and other battery-powered audio devices.