NXP Semiconductors MC9S08QE128CLH

Overview

MC9S08QE128CLH from NXP Semiconductors (formerly Freescale) is an 8-bit HCS08 microcontroller with 128 KB flash, 8 KB RAM, 70 GPIOs, 24-channel 12-bit ADC, dual analog comparators, and triple timer/PWM modules - designed for automotive body electronics, industrial control, and low-power sensor interface applications.

For engineers reviewing the MC9S08QE128CLH datasheet, MC9S08QE128CLH pinout, MC9S08QE128CLH application, or MC9S08QE128CLH equivalent, key selection criteria include its 50.33-MHz CPU at >2.4V, stop-mode wake-up in 6 μs, integrated RTC with 1-kHz low-power oscillator, and support for LIN, I²C, SPI, and SCI protocols across multiple package options including 48-pin QFN.

Technical Context

The MC9S08QE128CLH implements the HCS08 CPU core with HC08 instruction set plus BGND, supporting up to 32 interrupt/reset sources and operating at 50.33 MHz above 2.4 V, 40 MHz above 2.1 V, and 20 MHz above 1.8 V. Its internal clock source (ICS) uses FLL with factory-trimmed internal reference (0.2% resolution, ±2% deviation) to generate CPU frequencies from 2–50.33 MHz.

System-level timing is managed via three independent TPM modules (6+3+3 channels), a real-time counter (RTC) with external clock input and free-running 1-kHz oscillator, and dual SCIs with LIN master/slave break generation/detection. Analog subsystem includes a 24-channel 12-bit ADC with 2.5 μs conversion time, temperature sensor (1.7 mV/°C), and two ACMPs with edge-selectable interrupts and bandgap reference comparison.

Key Specifications

Pinout & Package

MC9S08QE128CLH is packaged in a 48-pin QFN (Case 1314, 7 mm² footprint) with exposed thermal pad. Pin assignments follow the 48-pin variant of the MC9S08QE128 series, featuring 70 GPIOs (including 1 input-only and 1 output-only pin), dual analog comparator I/O, 24 ADC inputs, and dedicated debug (BKGD/MS) and reset (RESET) pins.

Key Features

Applications

Equivalent & Alternatives

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

Compared with S9KEAZ128AMLH and MC9S08AC128CPUE, the MC9S08QE128CLH delivers optimal balance of legacy-code compatibility, rich analog/peripheral integration, and ultra-low-power stop3 operation - making it ideal for incremental upgrades and long-lifecycle automotive/industrial deployments where HCS08 toolchain continuity matters.

Availability

MC9S08QE128CLH is available at Aetrix Electronics and suitable for automotive body electronics, industrial sensor hubs, smart HVAC actuators, and energy-efficient smart meter interfaces requiring stable component supply across extended product lifecycles.

Supply support for MC9S08QE128CLH 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 focused on secure connectivity solutions for automotive, industrial, and IoT applications, with deep heritage in microcontrollers originating from Freescale.

The MC9S08QE128CLH belongs to the HCS08-based QE series - engineered for energy efficiency and robust operation in harsh environments, targeting cost-sensitive automotive body electronics and industrial control where reliability, low power, and proven toolchain support are paramount.

FAQ

What is the maximum operating frequency of the MC9S08QE128CLH and under what voltage conditions?

The MC9S08QE128CLH achieves a maximum CPU frequency of 50.33 MHz when operating above 2.4 V, 40 MHz above 2.1 V, and 20 MHz above 1.8 V across the full –40°C to +85°C temperature range. This voltage-dependent scaling allows dynamic performance adjustment to match power budget constraints while maintaining deterministic real-time behavior in the MC9S08QE128CLH.

Does the MC9S08QE128CLH support LIN communication, and how is it implemented?

Yes, the MC9S08QE128CLH supports LIN communication through its two SCI modules, which provide LIN master extended break generation and LIN slave extended break detection per ISO 9141-2. Each SCI can operate independently as master or slave, enabling dual-network capability - a feature confirmed in the official MC9S08QE128 datasheet Rev. 7 and directly applicable to the MC9S08QE128CLH in 48-pin QFN packaging.

What power-saving modes does the MC9S08QE128CLH offer, and what is its typical wake-up time?

The MC9S08QE128CLH offers two low-power stop modes and a reduced-power wait mode, with peripheral clock gating to disable unused modules. It features a very low power external oscillator option for stop3 mode and a dedicated 1-kHz RTC oscillator. Wake-up from stop modes is typically 6 μs - a value explicitly specified in the MC9S08QE128 datasheet Rev. 7 and validated for the MC9S08QE128CLH variant.

Can the MC9S08QE128CLH operate from a single 1.8 V supply, and what peripherals remain functional at that voltage?

Yes, the MC9S08QE128CLH operates from 1.82 V minimum and maintains full functionality of its 24-channel 12-bit ADC, dual analog comparators (ACMP1/ACMP2), real-time counter (RTC), and selected TPM channels in stop3 mode down to 1.8 V - as verified in Section 3.6 (DC Characteristics) and Section 3.12 (ADC Characteristics) of the MC9S08QE128 Rev. 7 datasheet applicable to the MC9S08QE128CLH.

What debug interface does the MC9S08QE128CLH use, and what capabilities does it provide?

The MC9S08QE128CLH uses a single-wire background debug (BKGD/MS) interface supporting in-circuit debugging with breakpoint capability (one active + two additional), on-chip ICE with two comparators and nine trigger modes, and an eight-deep FIFO for change-of-flow address logging - all documented in the MC9S08QE128 Rev. 7 datasheet and fully supported on the MC9S08QE128CLH in its 48-pin QFN package.