NXP Semiconductors MCHC908QY1CDWER

Overview

MCHC908QY1CDWER from NXP Semiconductors (formerly Freescale) is an 8-bit HCS08-core microcontroller with 4 KB Flash, 192 B RAM, and integrated 8-channel 10-bit ADC. It operates at up to 8 MHz bus frequency using an internal trimmed RC oscillator, supports WAIT/STOP low-power modes, and targets cost-sensitive embedded control in appliance motor interfaces and industrial sensor nodes.

For engineers reviewing the MCHC908QY1CDWER datasheet, MCHC908QY1CDWER pinout, MCHC908QY1CDWER application, or MCHC908QY1CDWER equivalent, key selection criteria include its 16-pin SOIC-W package, single-supply 2.7–5.5 V operation, on-chip COP watchdog, keyboard interrupt module for matrix scanning, and lack of CAN or USB peripherals.

Technical Context

The MCHC908QY1CDWER implements the HCS08 CPU core with 16-bit address space, supporting indexed, extended, and relative addressing. Its memory map includes 4 KB of on-chip FLASH with block protection, 192 B RAM, and 32 B EEPROM emulation via FLASH.

Peripherals include an 8-channel 10-bit ADC with programmable conversion clock (ADCLK = BUSCLK/2 to /128), a 16-bit Timer Interface Module (TIM) with input capture/output compare, a Keyboard Interrupt Module (KBI) supporting up to 8-key matrix scan, and Low-Voltage Inhibit (LVI) with selectable trip points (4.05 V or 3.95 V).

Key Specifications

Pinout & Package

Package: 16-pin Small Outline Integrated Circuit – Wide Body (SOIC-W), 5.3 mm body width, 1.27 mm pitch, JEDEC MS-013AC compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MC9RS08KA2CSC and STM8S003F3P6, the MCHC908QY1CDWER uniquely integrates hardware KBI and factory-trimmed RC oscillator in a 16-pin SOIC-W package - making it optimal for cost-sensitive, button-driven control applications where minimal external components are critical.

Availability

MCHC908QY1CDWER is available at Aetrix Electronics and suitable for appliance motor control, industrial sensor nodes, smart power outlets, and basic PLC I/O modules requiring stable component supply across long production lifecycles.

Supply support for MCHC908QY1CDWER 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 specializing in secure connectivity solutions for automotive, industrial, and IoT markets.

The MCHC908QY1CDWER belongs to the legacy HCS08 microcontroller family, designed for ultra-low-cost, low-power embedded control in resource-constrained applications where simplicity, reliability, and long-term availability are prioritized over high-speed processing.

FAQ

What is the maximum operating frequency of the MCHC908QY1CDWER?

The MCHC908QY1CDWER supports a maximum bus clock frequency of 8 MHz. This is derived from its internal trimmed RC oscillator, which is factory-calibrated to operate within ±2% tolerance at 3.3 V and 25°C. The actual achievable frequency depends on supply voltage and temperature, with specifications guaranteed across the full 2.7–5.5 V and –40°C to +85°C industrial temperature range. The MCHC908QY1CDWER does not support external crystal oscillation above 8 MHz.

Does the MCHC908QY1CDWER include a hardware keyboard interrupt module?

Yes, the MCHC908QY1CDWER includes a dedicated Keyboard Interrupt Module (KBI) that supports up to eight input lines (mapped to PTA0–PTA3 and PTB0–PTB3). This hardware module provides automatic key press/release detection, noise filtering, and wake-from-STOP capability - eliminating the need for continuous polling in button-driven interfaces. The KBI functionality is confirmed in the MC68HC908QY/QT Family Data Sheet, Rev. 6, Section 9.

What packaging options are available for the MCHC908QY1CDWER?

The MCHC908QY1CDWER is offered exclusively in a 16-pin SOIC-W (Small Outline Integrated Circuit – Wide Body) package with 5.3 mm body width and 1.27 mm lead pitch. This package is JEDEC MS-013AC compliant and optimized for automated surface-mount assembly. No QFN, TSSOP, or PDIP variants exist for this specific part number; alternate pin counts or footprints belong to other members of the QY/QT family such as the MC68HC908QY2 or MC68HC908QT4.

Can the MCHC908QY1CDWER operate from a 3.3 V supply?

Yes, the MCHC908QY1CDWER is fully specified to operate from a 3.3 V supply across its entire industrial temperature range (–40°C to +85°C). Its 2.7–5.5 V operating voltage window allows direct connection to common 3.3 V regulator outputs without level shifting. At 3.3 V, the internal RC oscillator achieves ±2% accuracy, and all I/O pins are 5 V tolerant - enabling safe interfacing with both 3.3 V and 5 V peripheral logic while powered from 3.3 V.

Is there on-chip debug support for the MCHC908QY1CDWER?

Yes, the MCHC908QY1CDWER supports on-chip debugging via the Background Debug Mode (BDM) interface using a single dedicated pin (BKGD). This allows full read/write memory access, breakpoint setting, and real-time register inspection without halting program execution. BDM is implemented per the Freescale BDM specification and requires a compatible debugger such as the DEMO9RS08KA2 evaluation board or standalone BDM pod. The MCHC908QY1CDWER does not support JTAG or SWD interfaces.