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The UPD78082(A) is a microcontroller manufactured by NEC (now part of Renesas Electronics). Below are its key specifications, descriptions, and features:

Manufacturer:

• NEC Electronics (now part of Renesas Electronics Corporation)

Specifications:

• Architecture: 8-bit microcontroller
• CPU Core: 78K0 series
• Operating Frequency: Up to 10 MHz
• ROM (Program Memory): 8 KB (Mask ROM)
• RAM (Data Memory): 256 bytes
• I/O Ports: 30 pins (multiplexed with other functions)
• Timers:
• 16-bit timer/counter × 1
• 8-bit timer × 2
• Serial Interface:
• UART (Asynchronous Serial Interface) × 1
• A/D Converter: 8-bit, 8-channel
• Interrupts: Multiple internal and external interrupt sources
• Power Supply Voltage: 4.5V to 5.5V (typical 5V operation)
• Package: 42-pin plastic DIP (Dual Inline Package)

Descriptions:

• The UPD78082(A) is a member of NEC’s 78K0 8-bit microcontroller family, designed for embedded control applications.
• It integrates ROM, RAM, timers, serial communication, and A/D conversion in a single chip, making it suitable for cost-sensitive applications.
• The 8-bit A/D converter allows for analog signal processing, while the UART supports serial communication.
• It is commonly used in consumer electronics, industrial control, and automotive applications.

Features:

• Low-power consumption with standby modes
• On-chip oscillator for clock generation
• Wide operating voltage range (4.5V–5.5V)
• Compact 42-pin DIP package for easy prototyping
• High noise immunity for industrial environments

This microcontroller is now considered obsolete, but it was widely used in embedded systems during its production period. For replacement or newer alternatives, Renesas offers upgraded 78K0 series MCUs.

Would you like additional details on pin configurations or application notes?