NXP Semiconductors MC9S08QE128CLK

Overview

MC9S08QE128CLK from NXP Semiconductors (formerly Freescale) is an 8-bit HCS08 microcontroller with 128 KB flash, 8 KB RAM, and integrated analog peripherals including a 24-channel 12-bit ADC, two analog comparators, RTC, and dual I²C/SPI/SCI interfaces. It operates up to 50.33 MHz at ≥2.4 V and supports multiple low-power stop modes with 6 μs wake-up time - deployed in automotive body control modules, industrial sensor nodes, and smart metering systems requiring robust timing and mixed-signal integration.

For engineers reviewing the MC9S08QE128CLK datasheet, MC9S08QE128CLK pinout, MC9S08QE128CLK application, or MC9S08QE128CLK equivalent, this page delivers verified package mapping (48-pin QFN, Case 1314), confirmed clock architecture (ICS + XOSC), real-world power specs (1.8–3.6 V operation, 6 μs stop-mode wake-up), and validated alternative parts for migration planning.

Technical Context

The MC9S08QE128CLK implements the HCS08 CPU core with BGND instruction support and handles up to 32 interrupt/reset sources. Its internal clock source (ICS) uses FLL control with factory-trimmed internal reference (0.2% resolution, ±2% deviation) to generate CPU frequencies from 2 MHz to 50.33 MHz across voltage and temperature.

Analog subsystem integration includes a 24-channel 12-bit ADC operating down to 1.8 V with 2.5 μs conversion time, internal bandgap reference (1.17 V), and on-chip temperature sensor (1.7 mV/°C); both ACMP1 and ACMP2 support stop3 mode operation and routing to TPM modules.

Key Specifications

Pinout & Package

MC9S08QE128CLK is packaged in a 48-pin QFN (Case 1314, 7 mm² footprint) with exposed thermal pad. Pin assignments are defined per Figure 4 and Table 2 of Rev. 7 datasheet; all pins support configurable drive strength, slew rate, pull-up/pull-down, and hysteresis.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 8-bit microcontroller applications.

Compared with MC9S08QE128CLK, MC9S08AC128 sacrifices RTC and ACMP2 to reduce cost while retaining pinout compatibility, whereas S9KEAZ128AMLH offers ARM-based scalability at the expense of layout change and software rework - making MC9S08QE128CLK optimal for legacy 8-bit upgrades requiring minimal hardware modification.

Availability

MC9S08QE128CLK is available at Aetrix Electronics and suitable for automotive body electronics, industrial sensor nodes, and smart metering applications requiring stable component supply, long-term lifecycle support, and AEC-Q100-qualified reliability.

Supply support for MC9S08QE128CLK includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

NXP Semiconductors is a global semiconductor leader specializing in secure connectivity solutions for automotive, industrial, and IoT markets, with roots in Freescale's microcontroller heritage.

The MC9S08QE128CLK belongs to the energy-efficient HCS08-based QE series, designed specifically for cost-sensitive, mixed-signal embedded applications demanding low-voltage operation, integrated analog peripherals, and automotive-grade robustness.

FAQ

What is the maximum operating frequency of the MC9S08QE128CLK and under what voltage conditions?

The MC9S08QE128CLK achieves up to 50.33 MHz when supplied at ≥2.4 V, 40 MHz at ≥2.1 V, and 20 MHz at ≥1.8 V - all across the full –40°C to +85°C temperature range. This voltage-frequency scaling is managed automatically by the internal clock source (ICS) FLL, ensuring deterministic timing without external frequency margining.

Does the MC9S08QE128CLK support real-time clock functionality in low-power stop modes?

Yes, the MC9S08QE128CLK includes a dedicated 8-bit real-time counter (RTC) that operates in run, wait, and stop3 modes using either an external crystal or its internal 1 kHz low-power oscillator. This allows precise time-of-day tracking and cyclic wake-up events without external components or additional power draw.

How many analog-to-digital converter channels does the MC9S08QE128CLK provide, and what is their resolution and speed?

The MC9S08QE128CLK integrates a 24-channel, 12-bit successive approximation register (SAR) ADC with 2.5 μs conversion time per sample. It operates fully from 1.8 V to 3.6 V, includes an internal bandgap reference (1.17 V), and features automatic compare functions and a built-in temperature sensor calibrated to 1.7 mV/°C.

What debug interface does the MC9S08QE128CLK use, and what capabilities does it offer?

The MC9S08QE128CLK uses a single-wire background debug (BDC) interface compliant with Freescale's BDM specification. It supports one hardware breakpoint during in-circuit debugging, plus two additional breakpoints via the on-chip debug module (DBG), which includes two comparators, nine trigger modes, and an eight-deep FIFO for flow-address tracing.

Is the MC9S08QE128CLK qualified for automotive applications, and what reliability standards does it meet?

Yes, the MC9S08QE128CLK is AEC-Q100 qualified for automotive applications. It meets HBM ESD tolerance of ±2000 V, CDM ESD of ±500 V, and latch-up immunity of ±100 mA. Its operating temperature range is –40°C to +85°C, and thermal resistance in 48-pin QFN is 81°C/W (single-layer board) or 26°C/W (four-layer board).