NXP Semiconductors MC9S08QA2CFQE

Overview

MC9S08QA2CFQE from NXP Semiconductors (formerly Freescale) is an 8-bit HCS08 microcontroller designed for ultra-low-power embedded control in space-constrained applications. It features a 20 MHz CPU core, 2 KB on-chip flash memory, 160 B RAM, integrated 10-bit ADC with temperature sensor, analog comparator, and single-channel TPM timer-all operating across 1.8–3.6 V supply and –40°C to +85°C ambient.

For engineers reviewing the MC9S08QA2CFQE datasheet, MC9S08QA2CFQE pinout, MC9S08QA2CFQE application, or MC9S08QA2CFQE equivalent, this page delivers verified technical context, validated package mapping to 8-pin DFN (Case 1452-02), confirmed low-power stop modes (Stop1/Stop2/Stop3), real-time interrupt capability in all modes, and precise ICS frequency trimming specs critical for timing-sensitive sensor interface and battery-powered control designs.

Technical Context

The MC9S08QA2CFQE implements the HCS08 CPU core with HC08 instruction set plus BGND, supporting up to 32 interrupt/reset sources and executing at up to 20 MHz across full voltage (1.8–3.6 V) and temperature (–40°C to +85°C) range. Its Internal Clock Source (ICS) integrates a frequency-locked loop (FLL) with trimmed internal reference enabling ±0.2% resolution and ≤±2% total deviation over voltage and temperature.

System-level protection includes watchdog COP reset (with dedicated 1 kHz clock option), low-voltage detection with configurable trip points (VLVD = 1.80–1.91 V), illegal opcode/address detection, and flash block protection. Peripherals include a 4-channel 10-bit ADC with 1.7 mV/°C temp sensor, ACMP with internal bandgap reference, and TPM module supporting input capture, output compare, and PWM-each accessible via shared GPIO pins with software-configurable drive strength and slew rate.

Key Specifications

Pinout & Package

MC9S08QA2CFQE is packaged in an 8-pin DFN (Case 1452-02), measuring 2.0 × 2.0 mm with 0.5 mm pitch and exposed thermal pad. This RoHS-compliant, surface-mount package supports automated assembly and provides thermal performance (θJA = 41 °C/W on 4-layer board) suitable for compact industrial and consumer modules.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MC9S08QA2CFQE, MC9S08QD4CFQE offers double flash/RAM in identical form factor for seamless firmware scaling, while STM8L051F3P6 provides ARM compatibility and higher resources but demands redesign of timing-critical ISR routines and ADC calibration logic.

Availability

MC9S08QA2CFQE is available at Aetrix Electronics and suitable for smart thermostats, industrial sensor nodes, medical wearables, and home appliance controls requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.

Supply support for MC9S08QA2CFQE 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 markets, with deep heritage in microcontrollers dating back to Motorola's 68HC08 family.

The MC9S08QA2CFQE belongs to the HCS08 ultra-low-power MCU product line, engineered specifically for cost-sensitive, space-constrained embedded control applications where sub-1 μA stop current, integrated analog peripherals, and robust debug capability are essential.

FAQ

What is the maximum bus frequency supported by the MC9S08QA2CFQE?

The MC9S08QA2CFQE supports a maximum bus frequency of 10 MHz, enabled by its Internal Clock Source (ICS) with FLL-controlled DCO output trimmed to 16–20 MHz. This allows reliable operation at 10 MHz bus speed across the full 1.8–3.6 V supply range and –40°C to +85°C temperature range, as verified in Table 9 of the official datasheet.

Does the MC9S08QA2CFQE include an integrated temperature sensor, and what is its accuracy?

Yes, the MC9S08QA2CFQE includes an integrated temperature sensor within its 10-bit ADC subsystem, with a calibrated slope of 1.646 mV/°C (–40°C to 25°C) and 1.769 mV/°C (25°C to 85°C). At 25°C, the sensor outputs 701.2 mV, and total unadjusted error is ±1.5 LSB (10-bit mode), enabling ±1°C typical accuracy after one-point calibration.

What are the key differences between Stop1, Stop2, and Stop3 modes on the MC9S08QA2CFQE?

Stop1 (475 nA typ) disables all clocks except RTI; Stop2 (600 nA typ) adds optional LVD monitoring; Stop3 (750 nA typ) enables full ADC operation and LVD interrupt capability. All three retain RAM and register contents, but only Stop3 supports active analog peripherals-critical for wake-on-sensor-event designs using the integrated ADC or ACMP.

Can the MC9S08QA2CFQE operate from a 1.8 V supply while running at maximum CPU speed?

Yes, the MC9S08QA2CFQE is fully specified to operate at up to 20 MHz CPU speed down to 1.8 V supply across –40°C to +85°C, as stated in the "8-bit HCS08 Central Processor Unit (CPU)" feature list and confirmed in Table 7 (supply current) and Table 9 (bus frequency) of the MC9S08QA4 series datasheet, which explicitly covers the MC9S08QA2 variant.

Is the MC9S08QA2CFQE pin-compatible with other members of the MC9S08QA4 series?

Yes, the MC9S08QA2CFQE shares identical 8-pin DFN (Case 1452-02), 8-pin SOIC (Case 751-07), and 8-pin PDIP (Case 626-06) package options and pin assignments with the MC9S08QA4 series, including identical pin sharing priority and electrical characteristics per Table 1 and Figure 2 in the datasheet-enabling drop-in replacement where flash/RAM requirements allow.