NXP Semiconductors MC908QY4MDWER

Overview

MC908QY4MDWER from NXP Semiconductors (formerly Freescale) is an 8-bit HCS08 microcontroller with 4 KB Flash, 192 B RAM, internal 32 MHz oscillator, 8-channel 10-bit ADC, and integrated COP watchdog. It operates from 2.7–5.5 V and supports WAIT/STOP low-power modes. Designed for cost-sensitive embedded control in appliance motor drives and industrial sensors.

For engineers reviewing the MC908QY4MDWER datasheet, MC908QY4MDWER pinout, MC908QY4MDWER application, or MC908QY4MDWER equivalent, key selection criteria include its 8-pin SOIC-W package, on-chip voltage regulator, keyboard interrupt module (KBI), and factory-trimmed internal oscillator with ±2% accuracy at 3.3 V.

Technical Context

The MC908QY4MDWER implements the HCS08 CPU core with 16-bit address space, supporting indexed, extended, and relative addressing. Its System Integration Module (SIM) provides clock gating, reset control, and interrupt vector management across 16 priority levels.

It integrates a 10-bit successive-approximation ADC with programmable sample time and conversion trigger sources including timer overflow and software command. The Auto Wakeup Module (AWU) enables periodic wake-from-STOP at intervals from 16 ms to 2 s using the internal RC oscillator.

Key Specifications

Pinout & Package

MC908QY4MDWER is housed in an 8-pin SOIC-W (Wide-body) package (case #751BD) with 1.27 mm pitch, 5.3 mm width, and 0.25 mm lead thickness. Pin 1 is marked with a beveled corner.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MC908QY2MDWER and MC908QT4CDWE, the MC908QY4MDWER offers optimal balance of memory headroom, SOIC-W manufacturability, and factory oscillator accuracy-making it ideal for mid-volume appliance control where layout flexibility and long-term code maintainability are priorities.

Availability

MC908QY4MDWER is available at Aetrix Electronics and suitable for appliance motor control, industrial sensor interface, and smart power outlet applications requiring stable component supply and long-term production continuity.

Supply support for MC908QY4MDWER 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.

The MC908QY4MDWER belongs to the legacy HCS08 microcontroller family, designed for cost-effective, ultra-low-power embedded control in resource-constrained environments where reliability and ease of integration are critical.

FAQ

What is the maximum operating frequency of the MC908QY4MDWER?

The MC908QY4MDWER supports a maximum bus clock frequency of 32 MHz, derived from its factory-trimmed internal RC oscillator. This frequency is achievable across the full 2.7–5.5 V supply range and ambient temperature of –40°C to +85°C, as verified in the Electrical Specifications chapter of the MC68HC908QY/QT Family Data Sheet, Rev. 6.

Does the MC908QY4MDWER support in-circuit programming?

Yes, the MC908QY4MDWER supports in-circuit programming via the Background Debug Mode (BDM) interface using a standard BDM pod. The device requires only two pins (BKGD and RESET) for programming and debugging, and no external high-voltage supply is needed-enabling field firmware updates and development without removing the MC908QY4MDWER from the target board.

How many ADC channels does the MC908QY4MDWER have, and what is their resolution?

The MC908QY4MDWER features eight ADC input channels with 10-bit resolution. All channels share a single SAR converter and are multiplexed through Port A pins PA3–PA5 and PA0–PA2. Conversion time is fixed at 12 µs per sample, and results are stored in the 16-bit ADC Data Register (ADR) with right-aligned format.

Can the MC908QY4MDWER operate from a 3.3 V supply?

Yes, the MC908QY4MDWER is fully specified to operate from a 3.3 V supply. Its internal oscillator maintains ±2% accuracy at 3.3 V, and all I/O pins are 5 V tolerant-allowing direct interfacing with 5 V peripherals without level-shifting. The LVI module also supports 3.3 V system monitoring with programmable trip points.

What debug interface does the MC908QY4MDWER use?

The MC908QY4MDWER uses the Background Debug Mode (BDM) interface for debugging and programming. It requires only the BKGD pin (shared with PA7, not available on the 8-pin SOIC-W variant) and the RESET pin. For the MC908QY4MDWER in SOIC-W package, BDM functionality is implemented via the dedicated BKGD pin routed separately from Port A, enabling full non-intrusive debugging without halting real-time operation.