NXP Semiconductors MC9S08QE128CLHR

Overview

MC9S08QE128CLHR 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 low-power industrial control and sensor interface applications requiring real-time responsiveness and robust peripheral integration.

For engineers reviewing the MC9S08QE128CLHR datasheet, MC9S08QE128CLHR pinout, MC9S08QE128CLHR application, or MC9S08QE128CLHR equivalent, this page delivers verified electrical specs, package mapping to 48-pin QFN (Case 1314), functional pin roles, validated alternatives, and design-critical timing and power characteristics directly traceable to Freescale Document MC9S08QE128 Rev. 7 and QFN_Addendum Rev. 0.

Technical Context

The MC9S08QE128CLHR implements the HCS08 CPU core with BGND instruction support and up to 50.33 MHz operation above 2.4 V, backed by a flexible clock system combining internal FLL (ICS) with ±0.2% trimming and external crystal/oscillator (31.25 kHz–16 MHz). Its interrupt architecture supports 32 sources with priority-based vectoring.

Peripherals include two SCIs with LIN master/slave capability, two SPIs with double-buffered TX/RX, two I²Cs supporting 100 kbps and multi-master mode, six-channel TPM3 plus two 3-channel TPMs, RTC with 1 kHz low-power oscillator, and ADC operating down to 1.8 V with temperature sensor and bandgap reference - all functional in Stop3 mode.

Key Specifications

Pinout & Package

MC9S08QE128CLHR is packaged in a 48-pin QFN (Case 1314) with exposed thermal pad, copper-wire interconnect per Freescale QFN_Addendum Rev. 0. Pinout follows Figure 4 and Table 2 of MC9S08QE128 Rev. 7, with VDD/VSS pins internally connected to dual pads for enhanced current handling.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MC9S08AC128CPUE, MC9S08QE128CLHR adds RTC, dual ACMP, and 24-channel ADC in same-pin-count QFN - enabling richer sensor fusion without PCB redesign; versus S9KEAZ128AMLH, it offers lower BOM cost and simpler certification path for legacy 8-bit designs.

Availability

MC9S08QE128CLHR is available at Aetrix Electronics and suitable for industrial motor control, smart sensor nodes, automotive body electronics, and home appliance interfaces requiring stable component supply, long-term lifecycle support, and qualified QFN packaging.

Supply support for MC9S08QE128CLHR 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 acquired Freescale in 2015 and maintains full technical and supply chain continuity for the HCS08 portfolio, including qualification, documentation, and long-term manufacturing.

The MC9S08QE128CLHR belongs to the QE128 series - an energy-efficient 8-bit MCU family targeting cost-sensitive, low-power industrial and automotive applications where deterministic real-time response and mixed-signal integration are critical.

FAQ

What is the maximum CPU frequency supported by the MC9S08QE128CLHR across its operating voltage range?

The MC9S08QE128CLHR supports up to 50.33 MHz CPU operation above 2.4 V, 40 MHz above 2.1 V, and 20 MHz above 1.8 V - all guaranteed across the full –40°C to +85°C temperature range per MC9S08QE128 Rev. 7 Section 1. The actual achievable frequency depends on bus clock configuration and ICS/FLL settings.

Does the MC9S08QE128CLHR support in-circuit debugging, and what interface is used?

Yes, the MC9S08QE128CLHR supports single-wire background debug (BDC) via the PTA4/BKGD/MS pin. This interface enables full in-circuit emulation, breakpoint setting (one hardware + two software breakpoints), and flash programming without requiring dedicated JTAG pins - reducing PCB routing complexity.

Can the MC9S08QE128CLHR operate in ultra-low-power modes while maintaining analog functionality?

Yes, the MC9S08QE128CLHR supports Stop3 mode where the RTC, ADC, analog comparators (ACMP1/ACMP2), and SCIs remain fully functional. Wake-up from Stop3 takes only 6 μs, and the ADC can perform conversions down to 1.8 V - enabling battery-powered sensing with sub-μA average current.

What are the key differences between the MC9S08QE128CLHR and the MC9S08QE128CLH?

The MC9S08QE128CLHR and MC9S08QE128CLH share identical electrical specifications and functionality. The 'R' suffix denotes RoHS-compliant packaging per Freescale's device numbering system - both use the same 48-pin QFN (Case 1314) with copper-wire bonding as confirmed in QFN_Addendum Rev. 0.

How is flash memory protected against unauthorized access on the MC9S08QE128CLHR?

The MC9S08QE128CLHR includes on-chip security circuitry that prevents unauthorized read access to flash and RAM contents. Once enabled, this protection locks the debug interface and blocks external read attempts - preserving firmware intellectual property in deployed systems without requiring external secure elements.