NXP Semiconductors MC9S08QG8CDTE

Overview

MC9S08QG8CDTE from Freescale Semiconductor is an 8-bit HCS08 microcontroller featuring a 20-MHz CPU, 8 KB FLASH/512 B RAM, internal clock source with FLL, and integrated peripherals including 10-bit ADC, SCI, SPI, I²C, TPM, ACMP, and KBI. It targets cost-sensitive embedded control in automotive body electronics, industrial sensors, and appliance motor control.

For engineers reviewing the MC9S08QG8CDTE datasheet, MC9S08QG8CDTE pinout, MC9S08QG8CDTE application, or MC9S08QG8CDTE equivalent, key selection criteria include QFN-16 package compatibility, single-wire background debug support, 12 GPIO + dedicated reset/IRQ pins, 10-bit ADC with temperature sensor, and COP watchdog with independent 1-kHz clock source.

Technical Context

The MC9S08QG8CDTE implements the S08CPUV2 core with HC08 instruction set extension (BGND), supporting up to 32 interrupt/reset sources and hardware breakpoint capability via on-chip debug module with two comparators and nine trigger modes. Its ICS module integrates a frequency-locked loop (FLL) with factory-trimmed internal reference enabling ±0.2% resolution and ±2% deviation over voltage/temperature.

Peripherals are tightly coupled to the bus architecture: ADC supports hardware triggering by RTI counter and includes automatic compare function with internal bandgap reference; TPM provides two channels configurable for input capture, output compare, or edge/center-aligned PWM; ACMP output can be routed directly to TPM for analog event-driven timing control.

Key Specifications

Pinout & Package

MC9S08QG8CDTE is housed in a 16-pin quad flat no-lead (QFN) package per outline 98ASA00671D, featuring an exposed thermal pad for improved heat dissipation in thermally demanding environments.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MC9S08QG8CDTE, MC9S08QG8CPBE trades thermal efficiency and miniaturization for assembly flexibility, while S9S08QG8J2CTJR delivers identical functionality with enhanced lifecycle assurance and modern toolchain integration - both serve as validated alternatives without requiring schematic or layout changes.

Availability

MC9S08QG8CDTE is available at Aetrix Electronics and suitable for automotive body electronics, industrial sensor nodes, home appliance motor control, and smart power outlet designs requiring stable component supply and long-term manufacturability.

Supply support for MC9S08QG8CDTE 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

Freescale Semiconductor was a leading designer of embedded processors, analog, and connectivity solutions, acquired by NXP Semiconductors in 2015. Its HCS08 family established benchmarks for low-cost, low-power 8-bit microcontrollers.

The MC9S08QG8 series was designed for cost-sensitive, space-constrained embedded control applications requiring robust analog integration, debug capability, and automotive-grade reliability - particularly in body electronics and appliance subsystems.

FAQ

What is the maximum operating frequency of the MC9S08QG8CDTE CPU?

The MC9S08QG8CDTE features a 20-MHz HCS08 CPU core. This maximum bus frequency is achievable using the internal clock source (ICS) with FLL enabled and properly configured external crystal or resonator, or via the XOSC module with 1–16 MHz crystal. The CPU executes instructions at this rate, enabling responsive real-time control in applications such as motor commutation and sensor polling.

Does the MC9S08QG8CDTE support in-circuit debugging, and what interface is used?

Yes, the MC9S08QG8CDTE supports in-circuit debugging via a single-wire background debug interface using the BKGD/MS pin. This interface enables full read/write memory access, register inspection, breakpoint setting (one hardware + two debug-module breakpoints), and real-time bus capture without halting peripheral operation - critical for validating timing-critical firmware during development.

What analog peripherals are integrated into the MC9S08QG8CDTE?

The MC9S08QG8CDTE integrates an 8-channel, 10-bit analog-to-digital converter (ADC) with internal bandgap reference, temperature sensor channel, and RTI-triggered conversion; plus an analog comparator (ACMP) with internal reference option and output routable to TPM for event-driven timing. These enable standalone sensor processing without external signal conditioning in applications like thermal monitoring and zero-crossing detection.

What power-saving modes does the MC9S08QG8CDTE offer, and how do they differ?

The MC9S08QG8CDTE provides Wait mode plus three Stop modes (Stop1, Stop2, Stop3). Stop3 offers deepest power reduction (sub-μA), retaining RAM and selected registers while disabling clocks to most peripherals; crucially, the COP watchdog remains active using its dedicated 1-kHz internal clock. Stop1/Stop2 retain more peripheral state but consume higher current - selection depends on wake-up latency and retention requirements.

Is the MC9S08QG8CDTE pin-compatible with other members of the QG8 family?

Yes, the MC9S08QG8CDTE shares identical pinout and electrical characteristics with other 16-pin QFN variants in the QG8 family, including MC9S08QG4CDTE (4 KB FLASH/256 B RAM). This allows scalable design reuse: firmware and PCB layout remain unchanged when migrating between memory configurations, reducing qualification effort and accelerating product variants.