A94B114FRN

The A94B114 is an 8-bit CMOS microcontroller based on an 8051-compatible CM8051-S core, offering a tightly integrated feature set for small home appliance and embedded control applications. It combines on-chip Flash and RAM with precision analog, timer/PWM, and system-monitoring peripherals to simplify control, sensing and power management designs.

With up to 16 MHz main-clock operation, internal high- and low-frequency oscillators, and comprehensive reset/LVI/LVR/watchdog functions, the A94B114 targets compact, reliable control systems that require mixed-signal integration and power-saving operation.

Key Features

• Core  8051-compatible CM8051-S 8-bit core with 1-clock-per-cycle execution and minimum instruction execution time of 62.5 ns at 16 MHz.
• Memory  8 Kbytes on-chip Flash with ISP; Flash endurance specified (10,000 cycles for Sector 0–247; 50,000 cycles for Sector 248–255) and 10-year data retention. On-chip RAM: 256 bytes IRAM + 256 bytes XRAM (total 0.5 Kbytes).
• Analog and Data Conversion  12-bit A/D converter with 10 input channels and an integrated comparator with selectable internal references (1.6 V, 2.2 V) and external comparator inputs.
• Timers and PWM  Multiple timers: one 8-bit timer (T0) and two 16-bit timers (T1, T2). 16-bit PWM with inverter and dead-band control (implemented via T1) for pulse generation and motor or drive control.
• Connectivity  On-chip communications: 1 × USART and 1 × I2C interface for sensor and peripheral interfacing.
• Oscillators & Clock  Internal high-frequency oscillator (32 MHz typical ±1.5% at 25 °C) and internal low-frequency oscillator (256 kHz ±10% in normal/IDLE). Supports external crystal or ceramic resonators from 0.4 to 16 MHz for the main clock.
• Power and System Reliability  Power-On Reset (POR), Low Voltage Reset (LVR), Low Voltage Indicator (LVI) with multi-level detection, and an on-chip Watchdog Timer (WDT) for robust system supervision.
• Low-power Modes  IDLE and STOP power-down modes plus a sub-active mode using the internal 128 kHz ring oscillator to reduce power consumption while maintaining essential operation.
• Packaging & Environmental Range  Available in a 20-TSSOP (173 mil) surface-mount package; operating temperature range −40 °C to +85 °C. Supply voltage range 2.0 V to 5.5 V (internal clock operation) and external clock operation supported.
• GPIO and Peripherals  18 GPIO pins (P0[7:0], P1[5:0], P2[3:0]), comparator, CRC, ADC interrupt and multiple external and peripheral interrupt sources for flexible system integration.

Typical Applications

• Small Home Appliances  Embedded control for appliances where integrated ADCs, PWM with dead-band and system supervision simplify motor and actuator control.
• Embedded Control Systems  General purpose embedded control tasks that benefit from 8051 compatibility, on-chip Flash ISP and diverse timer/interrupt resources.
• Sensor Interfacing and Monitoring  Multi-channel 12-bit ADC and comparator functions enable accurate sensor reading and threshold-based monitoring.
• Power and Safety Supervision  POR, LVR, LVI and Watchdog Timer support reliable power sequencing and fault detection in compact designs.

Unique Advantages

• Highly integrated mixed-signal peripherals: Combines 12-bit ADC, comparator, PWM with dead-band and multiple timers to reduce external components and BOM.
• Flash with in-system programming: 8 Kbytes of on-chip Flash with ISP and specified endurance/retention simplifies development and field updates.
• Flexible clocking: Internal 32 MHz HF and 256 kHz LF oscillators plus external crystal support provide design options for performance and low-power operation.
• Comprehensive system supervision: POR, LVR, LVI and an on-chip watchdog increase system reliability for long-term embedded deployments.
• Compact package for space-constrained designs: 20-TSSOP surface-mount package (173 mil) supports compact PCB layouts while exposing 18 GPIOs for control and I/O.

Why Choose A94B114FRN?

The A94B114FRN positions itself as a compact, integrated solution for small appliance and embedded control applications that require precise analog inputs, programmable PWM output with dead-band, and robust system monitoring. Its 8051-compatible core, on-chip Flash with ISP and comprehensive peripheral set make it suitable for developers seeking a balance of integration, predictable performance and straightforward migration from established 8-bit toolchains.

Designed for robust operation across a wide supply range and −40 °C to +85 °C, the A94B114FRN delivers long-term value through reduced BOM, flexible clocking options, and on-chip features that accelerate development and simplify system-level safety and power management.

Request a quote or submit a product inquiry to receive pricing and availability details for the A94B114FRN and support for integration into your design.