NXP Semiconductors MC9S08QA2CDNE

Overview

MC9S08QA2CDNE from NXP (formerly Freescale) is an 8-bit HCS08 microcontroller in an 8-pin SOIC package, featuring 2 KB flash, 128 B RAM, 10-bit ADC with temperature sensor, analog comparator, TPM timer/PWM, and internal FLL clock source operating from 1.8 V to 3.6 V across –40°C to 85°C. It targets ultra-low-power sensor interface and simple control applications.

For engineers reviewing the MC9S08QA2CDNE datasheet, MC9S08QA2CDNE pinout, MC9S08QA2CDNE application, or MC9S08QA2CDNE equivalent, key selection criteria include its 8-pin SOIC footprint, 2 KB flash/128 B RAM memory configuration, stop3-mode operation capability, internal bandgap-referenced ADC, and single-wire background debug interface compatibility.

Technical Context

The MC9S08QA2CDNE implements the HCS08 CPU core with HC08 instruction set plus BGND, supporting up to 32 interrupt/reset sources and operating at up to 20 MHz bus frequency via its internal clock source (ICS) with FLL and factory-trimmed internal reference (±2% deviation over voltage/temperature). Its ICS enables bus frequencies from 1 MHz to 10 MHz without external crystals.

On-chip peripherals include a 4-channel 10-bit ADC with automatic compare, internal 1.7 mV/°C temperature sensor, and bandgap reference channel - all functional down to 1.8 V and in stop3 mode; the analog comparator supports edge-triggered interrupts and internal tie to TPM input capture, while the single-channel TPM supports PWM, input capture, and output compare.

Key Specifications

Pinout & Package

MC9S08QA2CDNE is housed in an 8-pin SOIC (Small Outline Integrated Circuit) package with 1.27 mm pitch, JEDEC MS-012AC compliant, suitable for automated PCB assembly and space-constrained designs.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MC9S08QA2CDNE, MC9S08QG4CDTE offers double flash/RAM in identical packaging for incremental firmware growth, while STM8L051F3P6 delivers significantly lower power and higher ADC resolution at the cost of architecture migration and toolchain requalification.

Availability

MC9S08QA2CDNE is available at Aetrix Electronics and suitable for smart sensor nodes, industrial thermostats, portable medical monitors, and IoT edge controllers requiring stable component supply and long-term manufacturability.

Supply support for MC9S08QA2CDNE 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, now headquartered in Eindhoven, Netherlands, with leadership in secure connectivity and embedded processing.

The MC9S08QA2CDNE belongs to NXP's legacy HCS08 microcontroller family, designed specifically for cost-sensitive, ultra-low-power embedded control applications where minimal pin count, integrated analog peripherals, and robust debug support are critical.

FAQ

What is the maximum operating frequency of the MC9S08QA2CDNE?

The MC9S08QA2CDNE supports a maximum bus frequency of 10 MHz when using its internal clock source (ICS) with FLL enabled. At 3.6 V supply and 25°C, it can achieve up to 20 MHz CPU operation - however, the documented maximum guaranteed bus frequency across full voltage (1.8–3.6 V) and temperature (–40°C to +85°C) ranges is 10 MHz per the MC9S08QA4RM reference manual covering the QA2 variant.

Does the MC9S08QA2CDNE support in-circuit debugging?

Yes, the MC9S08QA2CDNE supports single-wire background debug mode (BDM) via the PTA4/BKGD pin. This allows full in-circuit programming, breakpoint setting, register inspection, and memory read/write during development - all using only one dedicated debug signal, which simplifies board layout and reduces connector count compared to multi-wire JTAG interfaces.

What analog peripherals are integrated into the MC9S08QA2CDNE?

The MC9S08QA2CDNE integrates a 4-channel 10-bit ADC with internal temperature sensor (1.7 mV/°C), bandgap reference channel, and automatic compare function; an analog comparator (ACMP) with selectable interrupt edges and internal tie to TPM input capture; and dedicated analog power (VDDAD/VSSAD) and reference (VREFH/VREFL) pins - all operational down to 1.8 V and in stop3 mode.

Is the MC9S08QA2CDNE pin-compatible with other HCS08 devices?

The MC9S08QA2CDNE shares the same 8-pin SOIC pinout with MC9S08QA4CDNE and MC9S08QG4CDTE, including identical VDD/VSS placement, BKGD/RESET positions, and multi-function I/O assignments. However, differences in flash size and peripheral enablement require firmware validation - it is not a drop-in replacement for higher-memory variants without software review.

What low-power modes does the MC9S08QA2CDNE support?

The MC9S08QA2CDNE supports three stop modes (Stop1, Stop2, Stop3) and wait mode. Stop3 is the deepest low-power state, drawing sub-1 µA current while maintaining RTC operation using the internal 1 kHz clock source. All analog peripherals - ADC, ACMP, and TPM - retain functionality in Stop3, enabling event-driven wake-up without external components.