MC94F1202AUB

The MC94F1202AUB is a CMOS 8-bit microcontroller based on the CM8051-S 8051 CPU core, designed for compact embedded control applications. It integrates 2 Kbytes of Flash program memory and 256 bytes of SRAM with mixed-signal peripherals to support sensor interfacing, motor and power control, and small appliance functions.

Key on-chip features include a 12-bit ADC with 14 channels, a 16-bit timer/counter with PWM capability, watchdog timer with WDT oscillator, internal RC oscillator, and system resets (POR, LVI, LVR). The device operates from 2.2 V to 5.5 V and is available in a 16-QFN (3 × 3 mm) surface-mount package for space-constrained designs.

Key Features

• Core  CM8051-S 8051-compatible 8-bit CPU delivering established 8051 architecture support for embedded control codebases.
• Memory  2 Kbytes of on-chip Flash program memory with code area protection and 256 bytes of SRAM for data and stack.
• Analog  12-bit A/D converter with 14 channels suitable for multi-sensor data acquisition and analog signal measurement.
• Timers & PWM  16-bit timer/counter with PWM capability and carrier generator for precise timing and control tasks.
• Clocking  Internal RC oscillator (internal 32 MHz RC oscillator specified in documentation) and device operation at typical CPU clock rates up to the specified device speed.
• System reliability  On-chip Power-On Reset (POR), Low-Voltage Indicator (LVI) and Low-Voltage Reset (LVR), plus a Watchdog Timer with WDTOSC for robust reset and recovery handling.
• Low-power modes  Support for power-saving modes to reduce consumption in battery-powered or energy-sensitive applications.
• I/O and package  Up to 14 programmable I/O lines in a compact 16-QFN (3 × 3 × 0.5 mm) surface-mount package; also available in multiple 16-pin packages per documentation.
• Operating conditions  Wide operating voltage range of 2.2–5.5 V and industrial temperature operation from −40 °C to 85 °C.

Typical Applications

• Battery charge & discharge control  Integrated ADC channels and voltage supervision features enable precise monitoring and control of battery systems.
• Small home appliances  Timing, PWM and sensor inputs support motor and user-interface control in compact appliance designs.
• Embedded sensor control  Multiple 12-bit ADC channels and programmable I/O are suited to sensor aggregation and local signal processing.
• General embedded control  Low-pin-count, low-footprint control tasks that benefit from on-chip Flash, watchdog, and reset functions.

Unique Advantages

• Highly integrated mixed-signal peripherals: Combines a 12-bit, 14-channel ADC with timers, PWM and carrier generator to reduce external components for sensor and motor control.
• Compact surface-mount footprint: 16-QFN (3 × 3 mm) package provides a small board area for space-constrained designs.
• Wide voltage range: 2.2–5.5 V supply tolerance allows flexibility across single-cell battery and multi-rail systems.
• Built-in system protection: POR, LVI/LVR and an integrated watchdog (with WDTOSC) help maintain reliable operation in the field.
• Familiar 8051 architecture: CM8051-S core provides a well-known development model for teams with 8051 experience and existing code assets.
• Industrial temperature capability: −40 °C to 85 °C operation supports a wide range of embedded and industrial environments.

Why Choose MC94F1202AUB?

The MC94F1202AUB positions itself as a compact, mixed-signal 8-bit microcontroller tailored for low-pin-count embedded control tasks that require precise analog measurement, reliable reset/watchdog functions, and flexible timing/PWM. Its combination of 2 Kbytes Flash, 256 bytes SRAM, multi-channel 12-bit ADC and built-in voltage supervision makes it suitable for battery management, appliance control and sensor-driven applications.

Designed for space- and power-sensitive systems, the device’s 16-QFN package, internal oscillator options and support for power-saving modes deliver a small-system footprint with essential peripheral integration. The MC94F1202AUB is a practical choice for engineers seeking a documented, component-level MCU with established 8051 architecture and on-chip analog/digital features.

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