NXP Semiconductors MCHC908QY2CDWE

Overview

MCHC908QY2CDWE from NXP Semiconductors (formerly Freescale) is an 8-bit HCS08-core microcontroller with 2 KB Flash, 128 B RAM, internal 4.2 MHz RC oscillator, 8-channel 8-bit ADC, and 16-pin SOIC-W package. It integrates COP watchdog, LVI reset, KBI, AWU, and TIM modules for embedded control in space-constrained industrial sensors and low-power metering.

For engineers reviewing the MCHC908QY2CDWE datasheet, MCHC908QY2CDWE pinout, MCHC908QY2CDWE application, or MCHC908QY2CDWE equivalent, key selection criteria include its 16-pin SOIC-W footprint, 2 KB Flash/128 B RAM memory map, internal RC oscillator trim capability, 8-bit ADC with 8 input channels, and support for WAIT/STOP low-power modes without external clock dependency.

Technical Context

The MCHC908QY2CDWE implements the HCS08 CPU core with 16-bit address bus and 8-bit data path, executing instructions at up to 4.2 MHz bus clock derived from its factory-trimmed internal RC oscillator. Its memory architecture includes 2 KB of on-chip FLASH with block protection and 128 bytes of RAM mapped at $0080–$00FF.

Peripherals include a 16-bit Timer Interface Module (TIM) with input capture/output compare, Keyboard Interrupt Module (KBI) supporting up to 8 keys, Auto Wakeup Module (AWU) with programmable timeout, and Low-Voltage Inhibit (LVI) circuitry triggering reset at 2.5 V ±0.1 V. All modules are integrated into a single die with no external memory interface.

Key Specifications

Pinout & Package

16-pin SOIC-W (Wide-body) package, 7.5 mm × 10.3 mm body, 1.27 mm pitch, RoHS-compliant, moisture sensitivity level 3.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MC9RS08KA2CSC and STM8S003F3P6, the MCHC908QY2CDWE delivers optimal balance of KBI/AWU hardware acceleration, minimal footprint, and proven reliability in cost-sensitive, low-power sensing nodes - without requiring layout changes or sacrificing essential analog control features.

Availability

MCHC908QY2CDWE is available at Aetrix Electronics and suitable for smart sensor nodes, industrial HMI interfaces, and portable medical monitors requiring stable component supply across extended product lifecycles.

Supply support for MCHC908QY2CDWE 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 MCHC908QY2CDWE belongs to the legacy HCS08 microcontroller family designed for cost-optimized, ultra-low-power embedded control in space-constrained applications where analog integration and hardware-accelerated peripherals reduce system complexity.

FAQ

What is the maximum operating frequency of the MCHC908QY2CDWE?

The MCHC908QY2CDWE operates with a maximum bus clock frequency of 4.2 MHz, derived from its internal RC oscillator. This frequency is factory-trimmed and remains stable across temperature and voltage ranges specified in the datasheet. The MCHC908QY2CDWE does not support external crystal or ceramic resonator operation above this frequency, and no PLL or frequency multiplier is present on-die.

Does the MCHC908QY2CDWE support in-circuit programming via standard interfaces?

Yes, the MCHC908QY2CDWE supports in-circuit programming using the Background Debug Mode (BDM) interface through dedicated pins (BKGD and RESET). This allows full FLASH read/write/erase operations and real-time debugging without removing the MCHC908QY2CDWE from the target board, enabling efficient development and field firmware updates.

Can the MCHC908QY2CDWE operate reliably at 3.3 V supply voltage?

Yes, the MCHC908QY2CDWE is fully specified to operate across 2.7–5.5 V, including 3.3 V nominal supply. At 3.3 V, all peripherals-including the 8-bit ADC, TIM, and KBI-function within datasheet limits. The internal RC oscillator maintains ±2% accuracy, and STOP mode current remains below 1 µA, making the MCHC908QY2CDWE suitable for mixed-voltage 3.3 V systems.

How many ADC input channels does the MCHC908QY2CDWE provide, and what is their resolution?

The MCHC908QY2CDWE provides eight 8-bit ADC input channels, mapped to PTA0–PTA3 and PTB0–PTB3. Conversion time is fixed at 12 µs per sample, and the ADC uses the internal RC oscillator as its clock source. No external reference is required-the ADC uses VDD as its reference, delivering 8-bit quantization with typical INL of ±1 LSB across the operating range.

Is the MCHC908QY2CDWE pin-compatible with other members of the QY/QT family?

No, the MCHC908QY2CDWE is not pin-compatible with MC68HC908QY4, QT2, or QT4 variants. While all share the 16-pin SOIC-W package, pin functions differ significantly-for example, PTA5–PTA7 and PTB3 are not bonded on the MCHC908QY2CDWE die. Pin assignments must be verified against the specific device's datasheet Figure 1-2 and Table 1-2 before PCB layout.