SX48 Technical Summary

Overview

The SX48 is a high-performance microcontroller featuring a rich set of peripherals and I/O capabilities. Designed for embedded applications requiring fast processing and flexible I/O configurations, the SX48 offers a 50 MIPS performance at 50 MHz oscillator frequency. It includes 4096 x 12 bits of EE/Flash program memory, 256 x 8 bits of SRAM, and multiple bidirectional I/O pins with symmetrical source/sink capabilities. The device supports in-system programming and includes an internal RC oscillator for flexible clocking options.

Features

• High Performance: 50 MIPS at 50 MHz oscillator frequency.
• Memory: 4096 x 12 bits EE/Flash program memory rated for 10,000 rewrite cycles and 256 x 8 bits SRAM.
• Timers: Two 16-bit timers with 8-bit prescalers supporting:
  • Software Timer mode
  • PWM mode
  • Simultaneous PWM/Capture mode
  • External Event mode
• I/O Pins: Multiple bidirectional I/O pins with TTL/CMOS/ST input levels and symmetrical source/sink capability.
• Programming: In-system programming capability through OSC pins.
• Clock Options: Internal RC oscillator with configurable rate from 31.25 kHz to 8 MHz.
• Comparator and MIWU: Integrated comparator with positive/negative inputs and multiple MIWU (Multiple Input Wake-Up) inputs.

Applications

The SX48 is suitable for a wide range of embedded applications, including but not limited to:

• Industrial control systems
• Motor control and PWM-driven applications
• Sensor interfacing and data acquisition
• Consumer electronics with low-power requirements
• Automotive control modules
• Home automation and IoT devices

Electrical Characteristics

Absolute Maximum Ratings

• Supply Voltage (V_DD): -0.3V to +6.5V
• Input Voltage (V_IN): -0.3V to V_DD + 0.3V
• Operating Temperature Range: -40°C to +85°C
• Storage Temperature Range: -65°C to +150°C

DC Characteristics

• High-Level Input Voltage (V_IH): 0.8V_DD (min)
• Low-Level Input Voltage (V_IL): 0.2V_DD (max)
• High-Level Output Voltage (V_OH): V_DD - 0.7V (min) at I_OH = -8.7 mA
• Low-Level Output Voltage (V_OL): 0.6V (max) at I_OL = 8.7 mA
• Supply Current (I_DD): 10 mA (typical) at 5V, 50 MHz

AC Characteristics

• Oscillator Frequency: Up to 50 MHz (external crystal or clock input)
• Instruction Cycle Time: 20 ns (at 50 MHz)
• Timer Resolution: 16-bit with 8-bit prescaler
• PWM Resolution: 10-bit (typical)

Package Information

Available Packages

• 40-Pin PDIP: Plastic Dual In-Line Package
• 44-Pin PLCC: Plastic Leaded Chip Carrier
• 52-Pin QFP: Quad Flat Package (additional I/O pins RA4-RA7 available)

Pinout Description

The SX48 features multiple bidirectional I/O pins grouped into ports (RA, RB, RC, RD, RE). Below is a summary of key pin functions:

• RA0-RA7: Bidirectional I/O pins with TTL/CMOS levels (RA4-RA7 available in 52-pin package only).
• RB0-RB7: Bidirectional I/O pins with TTL/CMOS/ST levels; includes comparator inputs/outputs and MIWU functionality.
• RC0-RC7: Bidirectional I/O pins with Timer T2 capture/PWM/compare functions.
• RD0-RD7: General-purpose bidirectional I/O pins.
• RE0-RE7: General-purpose bidirectional I/O pins.
• RTCC: Real-Time Clock/Counter input.
• MCLR: Master Clear reset input (active low).
• OSC1/In/V_PP: Crystal oscillator input or external clock source.
• OSC2/Out: Crystal oscillator output (pulled to V_DD in R/C mode).

Thermal Considerations

• Thermal Resistance (θ_JA): 70°C/W (PDIP), 50°C/W (PLCC), 45°C/W (QFP)
• Maximum Power Dissipation: 1W (at 25°C ambient temperature)