The MC68HC705J2P is an 8-bit microcontroller unit (MCU) manufactured by Rochester Electronics. It is part of the Motorola 68HC05 family of microcontrollers and is designed for embedded control applications. Rochester Electronics re-manufactures this part, ensuring availability for long-lifecycle products.

Applications:

• Consumer electronics control
• Appliance control
• Industrial control systems
• Automotive electronics (simple control functions)
• Remote control systems
• Security systems
• Toy and game control
• Simple data acquisition systems
• Embedded systems requiring basic I/O and processing

Features:

• 8-bit CPU (68HC05 core)
• 2K Bytes of EPROM
• 112 Bytes of RAM
• 12 Bidirectional I/O Lines
• 8-bit Timer with Programmable Prescaler
• On-Chip Oscillator
• Low-Voltage Inhibit (LVI)
• Serial Communications Interface (SCI)
• Software Programmable Options
• Available in DIP and SOIC Packages

Benefits:

• Cost-effective solution for embedded control applications.
• Integrated EPROM allows for program storage without external memory.
• Sufficient RAM for simple data manipulation and storage.
• Versatile I/O lines enable interfacing with various external devices.
• On-chip timer allows for precise timing control.
• Low-voltage inhibit provides protection against power supply fluctuations.
• Serial communication interface enables communication with other devices.
• Availability from Rochester Electronics ensures continued supply for legacy systems.

Additional Details:

The MC68HC705J2P operates on a single power supply, typically 5V. It has a relatively low power consumption, making it suitable for battery-powered applications. The instruction set is based on the Motorola 6805 architecture, which is known for its simplicity and ease of use. The EPROM can be programmed using a standard EPROM programmer. The microcontroller is available in both DIP (Dual In-Line Package) and SOIC (Small Outline Integrated Circuit) packages. The operating temperature range is typically between -40°C and +85°C. Because Rochester Electronics manufactures this part, it is vital to consult their datasheet for any deviations from the original Motorola specifications. The datasheet provides detailed information on electrical characteristics, pin assignments, and programming procedures. It is essential to follow the recommended programming guidelines to ensure proper operation of the device.