MC68HC705J1ACP

MC68HC705J1ACP is an 8-bit microcontroller from the 68HC05 family (Motorola/Freescale/NXP). It is a single‑chip MCU designed for low‑cost embedded control, combining CPU, on‑chip memory, and peripherals in one device.
Key points
- Core and memory: HC05 8‑bit CPU with on‑chip program memory and RAM. Exact sizes vary by package/revision.
- Peripherals: typically includes I/O ports, timers, a serial interface (SCI), and interrupt support; some variants add SPI and/or analog features (ADC/AC) depending on the part.
- Power/clock: designed for low‑cost operation with single‑supply voltage (commonly around 4.5–5.5 V; some versions support a broader range) and various clocking options; includes low‑power modes.
- Package and temperature: available in multiple packages (DIP/SOIC, etc.); automotive/industrial temp ranges may be offered on some revisions.
- Development: programmed in C or assembly; supported by Freescale/NXP toolchains and in‑system programming/debugging options.
Applications: suitable for simple control tasks, sensors/actuators, small embedded controllers in automotive or industrial environments.
Note: exact RAM/ROM sizes, peripherals, and packaging depend on the specific J1ACP variant—consult the official datasheet for precise specifications.

Here are the key features of the MC68HC705J1ACP (HC05 family):
- 8-bit HC05 CPU core
- On-chip program memory (ROM) and data memory (RAM) with configurable sizes (typical ranges: a few KB ROM and hundreds of bytes RAM; exact sizes depend on device variant)
- 28-pin package (DIP/SOIC) with multiple I/O lines
- Serial communications interface (SCI) for asynchronous serial I/O
- Timers: at least one 8‑bit timer (plus prescalers) and a watchdog timer
- Interrupt system with multiple sources and vectoring
- On-chip clock/oscillator support and external clock options
- Low-power operation modes for energy efficiency
- In-system programming/debug support (ICP/ICD) with vendor tools
- Operating voltage range roughly 2.7–5.5 V (varies by specific part)
Note: exact ROM/RAM sizes, I/O count, and peripheral mix can vary by specific device variant within the MC68HC705J1ACP family. Refer to the datasheet for precise specifications.

Plastic DIP package, 40 pins (DIP-40).

- Pin count: 20 pins (20-pin package such as DIP20/SOIC20).
- Function: An 8‑bit microcontroller from the 68HC05 family (MC68HC705J1ACP) with on‑chip ROM/RAM, I/O, timing, and a serial communications interface (SCI) for embedded control applications.

Manufacturer: Motorola Semiconductor (the MC68HC705 line was later carried by Freescale and, since 2015, by NXP Semiconductors).
Company type: a multinational electronics and semiconductor company that designs and manufactures integrated circuits, microcontrollers, and related electronic components for automotive, consumer, and industrial markets.

MC68HC705J1ACP is an 8‑bit, low‑pin, cost‑effective MCU. Common application areas:
- Automotive body electronics and control modules (lighting, door modules, HVAC)
- Consumer appliances and A/V equipment (remote controls, microwaves, washers/dryers)
- Industrial sensing and simple control systems (meters, sensors, data loggers, small PLC tasks)
- Low‑power handheld/battery‑powered devices and portable instruments