MC9S08QD4CSCR

Product Overview

The MC9S08QD4CSCR is an 8-bit S08 microcontroller from NXP USA Inc. that integrates 4KB of FLASH program memory, 256 x 8 RAM, and four I/O pins in an 8-SOIC surface-mount package. It operates at 16MHz using an internal oscillator and supports a 2.7V to 5.5V supply range. The device includes analog-to-digital conversion with four 10-bit channels, as well as PWM, low-voltage detection, power-on reset, and watchdog timer peripherals. Its specified operating temperature range is -40°C to 85°C (TA).

Key Features

• 8-bit S08 core with a 16MHz operating speed and internal oscillator.
• 4KB (4K x 8) FLASH program memory and 256 x 8 RAM.
• Four I/O pins and four 10-bit analog-to-digital converter channels.
• Includes PWM, low-voltage detection, power-on reset, and watchdog timer peripherals.
• 8-SOIC surface-mount package, 0.154 inch / 3.90mm width.
• Operates from 2.7V to 5.5V over a -40°C to 85°C ambient range.

Applications

• Compact embedded control functions in surface-mount assemblies where four I/O pins are sufficient.
• Analog sensor monitoring using the four 10-bit ADC channels.
• Simple pulse-width-modulated output for basic load or actuator control.
• Low-pin-count subsystems requiring power-on reset, low-voltage detection, and watchdog timer support.

Design & Procurement Notes

Design considerations should account for the available 4KB FLASH and 256 x 8 RAM, which constrain firmware size and runtime data storage. The four I/O pins and four 10-bit ADC channels also define the achievable peripheral count and analog input flexibility. Because the device uses an internal oscillator, clocking should be planned around the 16MHz core speed. The 2.7V to 5.5V supply range and 8-SOIC surface-mount footprint should be checked against board voltage and mechanical layout requirements. The -40°C to 85°C ambient operating range is relevant for selecting thermal margins in the final assembly.