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The TC9142P is a remote control encoder IC manufactured by Toshiba. Here are the factual details from the Manufactor Datasheet:

Manufacturer:

• Toshiba (now part of Kioxia Holdings Corporation after restructuring)

Specifications:

• Function: Remote control encoder IC
• Package: DIP (Dual In-line Package)
• Operating Voltage: Typically 2.2V to 5.5V
• Output Type: CMOS
• Oscillator: Built-in RC oscillator
• Key Inputs: Multiple key input channels
• Modulation: Supports carrier modulation for infrared (IR) remote control applications
• Data Format: Serial data output

Descriptions:

• The TC9142P is designed for remote control systems, particularly for consumer electronics like TVs, audio systems, and other appliances.
• It encodes key press information into a serial data stream for transmission via an IR LED.
• Includes features like key debounce and auto-repeat functionality for long key presses.

Features:

1. Low Power Consumption: Suitable for battery-operated devices.

2. Multiple Key Inputs: Supports multiple button configurations.

3. Built-in Oscillator: Reduces external component count.

4. CMOS Technology: Ensures low power and high noise immunity.

5. Auto-Repeat Function: Allows continuous transmission for held-down buttons.

6. Carrier Modulation: Facilitates IR remote control applications.

For exact electrical characteristics and application circuits, refer to the official Toshiba datasheet.