18AC75 Technical Summary

Overview

The 18AC75 is a high-performance microcontroller from the SX18/20/28AC75 series, designed for applications requiring fast processing speeds and efficient power consumption. This 28-pin SSOP (Shrink Small Outline Package) device is optimized for embedded systems, offering a robust set of features for real-time control and signal processing tasks. With its advanced architecture, the 18AC75 delivers up to 75 MIPS (Million Instructions Per Second) at a 75 MHz oscillator frequency, making it suitable for demanding applications in industrial, automotive, and consumer electronics.

Features

• High Performance: 75 MIPS at 75 MHz oscillator frequency (SX18/20/28AC75).
• Scalable Speed: Capable of 100 MIPS at 100 MHz oscillator frequency (higher-speed variants).
• Advanced Architecture: Optimized for real-time control and signal processing.
• Versatile I/O: Multiple general-purpose I/O pins (RC4, RC3, RB6, RB5, etc.) for flexible interfacing.
• Integrated Oscillator: Supports external oscillator inputs (OSC1, OSC2) for precise timing.
• Power Management: Includes Vdd (power supply) and Vss (ground) pins for efficient power distribution.
• Reset Functionality: MCLR (Master Clear Reset) pin for system reset control.
• RTCC Support: Real-Time Clock/Calendar (RTCC) functionality for time-sensitive applications.
• Compact Package: 28-pin SSOP package for space-constrained designs.

Applications

The 18AC75 microcontroller is ideal for a wide range of applications, including but not limited to:

• Industrial Automation: Motor control, PLCs (Programmable Logic Controllers), and sensor interfacing.
• Automotive Systems: Engine control units (ECUs), dashboard displays, and infotainment systems.
• Consumer Electronics: Smart home devices, wearables, and portable gadgets.
• Medical Devices: Patient monitoring systems and diagnostic equipment.
• Communication Systems: Modems, routers, and wireless communication modules.

Electrical Characteristics

Absolute Maximum Ratings

• Supply Voltage (Vdd): -0.3V to +6.0V
• Input Voltage (any pin): -0.3V to Vdd + 0.3V
• Operating Temperature Range: -40°C to +85°C
• Storage Temperature Range: -65°C to +150°C

Recommended Operating Conditions

• Supply Voltage (Vdd): 2.0V to 5.5V
• Oscillator Frequency: Up to 75 MHz (for 75 MIPS operation)
• I/O Pin Current (sink/source): ±25 mA (max per pin)

Power Consumption

• Active Mode (75 MHz): 50 mA (typical)
• Idle Mode: 10 mA (typical)
• Sleep Mode: 1 µA (typical)

Package Information

28-Pin SSOP Mechanical Dimensions

• Package Type: SSOP (Shrink Small Outline Package)
• Pin Count: 28
• Body Size: 5.3 mm x 10.2 mm
• Lead Pitch: 0.65 mm
• Lead Width: 0.22 mm (min)
• Lead Length: 0.6 mm (min)

Pin Configuration

The 18AC75 features a 28-pin SSOP package with the following pinout:

• Pin 1: RC4
• Pin 2: RC3
• Pin 3: RB6
• Pin 4: RB5
• Pin 5: SX
• Pin 6: OSC2
• Pin 7: RC7
• Pin 8: RC6
• Pin 9: RC5
• Pin 10: Vdd
• Pin 11: Vdd
• Pin 12: RA2
• Pin 13: RA3
• Pin 14: RB0
• Pin 15: RB1
• Pin 16: RB2
• Pin 17: RB3
• Pin 18: RB4
• Pin 19: Vss
• Pin 20: MCLR
• Pin 21: OSC1
• Pin 22: RC2
• Pin 23: RC1
• Pin 24: RC0
• Pin 25: RB7
• Pin 26: Vss
• Pin 27: RTCC
• Pin 28: RA0

Conclusion

The 18AC75 microcontroller is a powerful and versatile component, offering high-speed processing, low power consumption, and a compact form factor. Its rich feature set and robust electrical characteristics make it an excellent choice for a wide range of embedded applications. Whether used in industrial automation, automotive systems, or consumer electronics, the 18AC75 delivers reliable performance and flexibility.