The CDP1802D is an 8-bit CMOS microprocessor from Intersil Corporation. Known for its COSMAC architecture, this microprocessor is historically significant and was used in a variety of applications, including embedded systems and early personal computers. The 'D' designation generally indicates a ceramic package.

Applications

• Embedded control systems
• Industrial automation
• Early personal computers (e.g., RCA COSMAC ELF)
• Spacecraft (e.g., Voyager probes)
• Educational kits and projects

Features

• 8-bit CMOS microprocessor
• COSMAC architecture
• Static CMOS design for low power consumption
• Single-rail power supply operation
• Built-in DMA controller
• On-chip clock oscillator
• 16 x 16-bit general-purpose registers

Benefits

• Low power consumption suitable for battery-powered applications
• Simple architecture for ease of programming
• Direct memory access capability for efficient data transfer
• Reliable operation in harsh environments
• Versatile for a wide range of control applications
• Historically significant microprocessor for retrocomputing enthusiasts

Additional Details

The CDP1802D is notable for its use in the Voyager spacecraft, highlighting its radiation tolerance and reliability in extreme conditions. Its static CMOS design allows it to operate at very low clock speeds, minimizing power consumption. The COSMAC architecture is characterized by its register-based operation and use of a program counter stack. Its single-rail power supply simplifies system design.

Technical Specifications:

• Package Type: DIP (Ceramic)
• Data Bus Width: 8-bit
• Address Bus Width: 16-bit
• Clock Frequency: Typically up to 6.4 MHz (depending on version)
• Operating Voltage: 4V to 10.5V
• Operating Temperature Range: -55°C to +125°C