NXP Semiconductors MC9S08QE64CLH

Overview

MC9S08QE64CLH from NXP Semiconductors (formerly Freescale) is an 8-bit HCS08 microcontroller with 64 KB flash, 4 KB RAM, 48-pin QFN package, and integrated 24-channel 12-bit ADC, dual analog comparators, RTC, and multiple serial interfaces (SCI, SPI, I²C). It operates up to 50.33 MHz at ≥2.4 V and supports automotive-grade temperature range (–40°C to +85°C) for body control modules and sensor nodes.

For engineers reviewing the MC9S08QE64CLH datasheet, MC9S08QE64CLH pinout, MC9S08QE64CLH application, or MC9S08QE64CLH equivalent, key selection criteria include its 48-pin QFN thermal performance (θJA = 81°C/W on single-layer board), stop-mode wake-up time (6 μs), internal clock source (ICS) with ±2% deviation, and LIN-compliant SCI peripherals for in-vehicle networking.

Technical Context

The MC9S08QE64CLH implements the HCS08 CPU core with BGND instruction support and handles up to 32 interrupt/reset sources. Its ICS module uses a FLL locked to internal or external reference, enabling CPU frequencies from 2 MHz to 50.33 MHz with factory-trimmed 0.2% resolution on the internal reference.

Power management includes two low-power stop modes and a reduced-power wait mode, with peripheral clock gating and a very low-power external oscillator option for stop3 mode. The real-time counter operates across run/wait/stop modes using either internal 1-kHz oscillator or external clock sources.

Key Specifications

Pinout & Package

MC9S08QE64CLH uses a 48-pin QFN package (Case 1314) with exposed thermal pad. Pin assignments follow the MC9S08QE128 series layout, supporting 38 GPIOs, dual SCI, dual SPI, dual I²C, six TPM channels, RTC, and analog peripherals.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MC9S08AC60CFGE, MC9S08QE64CLH adds RTC and dual ACMP for deterministic timing and fault-tolerant analog sensing; versus S9KEAZN64ACLH, it delivers lower active current and legacy toolchain continuity at the expense of 32-bit scalability.

Availability

MC9S08QE64CLH is available at Aetrix Electronics and suitable for automotive body electronics, industrial sensor nodes, smart appliance control, and portable medical diagnostics requiring stable component supply and long-term lifecycle support.

Supply support for MC9S08QE64CLH 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 company formed from the spin-off of Philips' semiconductor division, specializing in secure connectivity solutions for automotive, industrial, and IoT markets.

The MC9S08QE series was designed as an energy-efficient, cost-optimized HCS08 MCU family targeting automotive body electronics and industrial control applications requiring robust analog integration and low-power operation.

FAQ

What is the maximum operating frequency of the MC9S08QE64CLH at 2.7 V?

The MC9S08QE64CLH achieves up to 50.33 MHz CPU frequency when operating above 2.4 V. At exactly 2.7 V, it sustains full 50.33 MHz operation across the –40°C to +85°C temperature range, as confirmed by the MC9S08QE128 Series Data Sheet Rev. 7 timing specifications under DC Characteristics and AC Characteristics sections.

Does the MC9S08QE64CLH support LIN bus communication?

Yes, the MC9S08QE64CLH supports LIN bus communication via its two SCI modules, which include hardware features for LIN master extended break generation and LIN slave extended break detection. This enables direct implementation of LIN 2.x physical layer protocols without external transceivers beyond standard level-shifting components.

What is the purpose of the exposed pad on the MC9S08QE64CLH QFN package?

The exposed thermal pad on the MC9S08QE64CLH's 48-pin QFN package (Case 1314) must be soldered to a PCB copper pour to achieve specified thermal resistance (θJA = 81°C/W on single-layer board). It provides primary heat dissipation path from the die and improves reliability under sustained 50.33 MHz operation at elevated ambient temperatures.

Can the MC9S08QE64CLH operate from a single 1.8 V supply?

Yes, the MC9S08QE64CLH supports operation down to 1.82 V minimum supply voltage. At 1.8 V, it runs at up to 20 MHz CPU frequency across the full temperature range, with all peripherals including ADC, RTC, and comparators fully functional - verified in the Electrical Characteristics section of the MC9S08QE128 Series Data Sheet Rev. 7.

How many analog comparator outputs can be routed to TPM modules on the MC9S08QE64CLH?

Both analog comparators (ACMP1 and ACMP2) on the MC9S08QE64CLH support optional routing of their outputs to TPM modules. Specifically, ACMP1O and ACMP2O can be directed to TPM input capture or PWM synchronization logic, enabling event-triggered timing actions such as motor phase switching or fault-response pulse termination.