Printed circuit assemblies
Parts and accessories suitable for use solely or principally with the apparatus of heading 8519 or 8521: > Other: > Parts of telephone answering machines: > Printed circuit assemblies
Duty Rate (from China)
Except for products described in headings 9903.03.02–9903.03.11, articles the product of any country, as provided for in subdivision (aa) of U.S. note 2 to this subchapter
Except as provided in headings 9903.88.13, 9903.88.18, 9903.88.33, 9903.88.34, 9903.88.35, 9903.88.36, 9903.88.37, 9903.88.38, 9903.88.40, 9903.88.41, 9903.88.43, 9903.88.45, 9903.88.46, 9903.88.48, 9903.88.56, 9903.88.64, 9903.88.66, 9903.88.67, 9903.88.68, or 9903.88.69, articles the product of China, as provided for in U.S. note 20(e) to this subchapter and as provided for in the subheadings enumerated in U.S. note 20(f)
Products classified under HTS 8522.90.45.00
Telephone Answering Machine Main PCB
Printed circuit assembly containing the microcontroller, memory, and signal processing chips specifically designed for telephone answering machines of heading 8521. It handles voice recording, playback, and call detection functions. Classified under 8522.90.45.00 as a dedicated part for answering machines.
Answering Machine Audio Codec PCA
Specialized printed circuit board with ADC/DAC chips and amplifiers for digitizing and reproducing voice messages in telephone answering devices. Essential for the core recording functionality of 8521 apparatus. Falls under 8522.90.45.00 due to its principal use in answering machines.
Digital Answering System Control Board
Printed circuit assembly with flash memory controller and DTMF decoder for digital telephone answering machines. Manages message storage and remote access codes per heading 8521 specs. Specifically classified in 8522.90.45.00 for answering machine parts.
Caller ID Interface PCA for Answering Machines
Printed circuit board integrating FSK demodulator and display driver for capturing caller information in telephone answering systems. Directly supports 8521 answering machine functionality. HTS 8522.90.45.00 applies to these dedicated assemblies.
Voice Message Playback Amplifier Board
Audio power amplifier printed circuit assembly optimized for speaker output in telephone answering machines. Handles message playback volume control and tone generation for 8521 devices. Classified under 8522.90.45.00 as answering machine-specific part.
Remote Access Modem PCA
Printed circuit assembly with DTMF tone decoder and line interface for remote message retrieval in answering machines. Enables phone-based control of 8521 apparatus functions. HTS 8522.90.45.00 for dedicated answering machine telecom parts.
Answering Machine Power Management PCB
Printed circuit board with DC-DC converters and battery charging circuits tailored for continuous operation of telephone answering machines. Ensures reliable 8521 apparatus uptime during outages. Specific to 8522.90.45.00 classification.
Message Counter Display Driver Assembly
Printed circuit assembly driving 7-segment LED display for message count indication on telephone answering machines. Integral to user interface of heading 8521 devices. Falls under HTS 8522.90.45.00 as dedicated part.
Telephone Line Interface PCA
Printed circuit assembly providing ring detection, line seizure, and impedance matching for answering machines. Critical connection between PSTN and 8521 recording apparatus. Classified specifically under 8522.90.45.00.
Greeting Message Storage Controller Board
Flash memory controller PCA dedicated to storing and playing personalized outgoing greetings in digital answering systems. Supports OGM/IGM functions of 8521 machines. HTS 8522.90.45.00 for this specific application.
Multi-Language Voice Prompt PCA
Printed circuit assembly with multi-language ROM chips and synthesizer for international answering machines. Provides localized prompts for 8521 apparatus users. Dedicated part under 8522.90.45.00.
Answering Machine Flash Upgrade Interface Board
Printed circuit assembly for firmware upgrades via telephone line in digital answering systems. Includes bootstrap loader and serial interface for 8521 devices. Specific to HTS 8522.90.45.00.
Integrated DSP Speech Compression PCA
Digital Signal Processor printed circuit assembly using ADPCM compression for efficient message storage in answering machines. Core 8521 functionality component. Classified under 8522.90.45.00.
Answering Machine Keypad Scanner Board
Printed circuit assembly scanning membrane keypad for playback/skip/delete functions on telephone answering machines. User control interface for 8521 apparatus. HTS 8522.90.45.00 specific part.
OEM Answering Machine Motherboard Assembly
Complete main printed circuit assembly integrating all core functions for OEM telephone answering machines under heading 8521. Consolidates control, audio, and line interface on single board. Dedicated classification under 8522.90.45.00.