NXP Semiconductors MCHC908QY1VDWE

Overview

MCHC908QY1VDWE from NXP Semiconductors (formerly Freescale) is an 8-bit HCS08-core microcontroller with 4 KB Flash, 192 B RAM, internal 32 MHz RC oscillator, 8-channel 10-bit ADC, and 16-pin SOIC package. It integrates COP watchdog, LVI reset, keyboard interrupt, and auto-wakeup modules for low-power embedded control in battery-powered sensors and industrial I/O modules.

For engineers reviewing the MCHC908QY1VDWE datasheet, MCHC908QY1VDWE pinout, MCHC908QY1VDWE application, or MCHC908QY1VDWE equivalent, key selection criteria include its 16-pin SOIC footprint, 3.3–5.5 V operating range, on-chip oscillator trim register (OSCTRIM), and support for WAIT/STOP low-power modes with wake-on-IRQ/KBI events.

Technical Context

The MCHC908QY1VDWE implements the HCS08 CPU core with 16-bit address bus, supporting up to 64 KB memory space. Its oscillator module provides selectable clock sources: internal RC (±2% typical after trim), external crystal (up to 8 MHz), or external clock input via OSC1.

It features a System Integration Module (SIM) that manages reset sources (power-on, COP timeout, LVI, IRQ), interrupt vectors (16 priority levels), and low-power mode entry/exit. The ADC operates with programmable prescaler, supports single-shot and continuous conversion, and delivers ±2 LSB integral nonlinearity at 10-bit resolution.

Key Specifications

Pinout & Package

Package: 16-pin SOIC (Small Outline Integrated Circuit), 300 mil width, JEDEC MS-012AC standard, RoHS-compliant lead finish.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MC9RS08KA2CPD and MC9S08QG4CDTE, the MCHC908QY1VDWE uniquely combines KBI hardware, 16-pin SOIC packaging, and factory-trimmable RC oscillator - making it optimal for cost-sensitive, keypad-driven industrial controls where minimal BOM count and guaranteed wake-on-keypress are essential.

Availability

MCHC908QY1VDWE is available at Aetrix Electronics and suitable for industrial sensor nodes, smart thermostat interfaces, and legacy equipment retrofit projects requiring stable component supply and long-term manufacturing continuity.

Supply support for MCHC908QY1VDWE 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 specializing in secure connectivity solutions for automotive, industrial, and IoT applications.

The MCHC908QY1VDWE belongs to the legacy HCS08 microcontroller family, designed for cost-effective, low-power embedded control in resource-constrained industrial and consumer systems where reliability and long-term availability are critical.

FAQ

What is the maximum operating frequency of the MCHC908QY1VDWE?

The MCHC908QY1VDWE supports a maximum internal bus clock of 32 MHz using its trimmed RC oscillator. When driven by an external crystal, the maximum frequency is 8 MHz. The actual achievable system clock depends on configuration of the BUSCLK divider and oscillator source selection in the CONFIG registers. The MCHC908QY1VDWE datasheet specifies timing parameters up to 32 MHz for internal operation and 8 MHz for crystal-based designs.

Does the MCHC908QY1VDWE support in-circuit programming?

Yes, the MCHC908QY1VDWE supports in-system programming (ISP) via the background debug mode (BDM) interface using a standard Freescale/NXP BDM pod. Flash memory can be reprogrammed without removing the MCHC908QY1VDWE from the target board, enabling field firmware updates and production programming. The MCHC908QY1VDWE requires only four BDM pins (BKGD, RESET, VDD, VSS) for full debug and programming access.

What power supply voltage range is supported by the MCHC908QY1VDWE?

The MCHC908QY1VDWE operates across a supply voltage range of 3.3 V to 5.5 V. This dual-voltage capability allows direct integration into both modern 3.3 V systems and legacy 5 V industrial control circuits without level translation. The internal LVI module provides three programmable reset thresholds (4.25 V, 3.85 V, 3.45 V) to ensure reliable operation across the full MCHC908QY1VDWE voltage range.

How does the keyboard interrupt (KBI) module function on the MCHC908QY1VDWE?

The KBI module on the MCHC908QY1VDWE monitors up to four Port A pins (PTA0–PTA3) for transitions and generates an interrupt on configurable edges. It remains fully functional in STOP mode, drawing less than 2 µA, and wakes the MCHC908QY1VDWE on keypress. The MCHC908QY1VDWE KBI does not require external pull-ups or debouncing circuitry, reducing BOM count and PCB area for keypad-based user interfaces.

Is the MCHC908QY1VDWE pin-compatible with other members of the QY/QT family?

Yes, the MCHC908QY1VDWE shares identical pinout and package (16-pin SOIC) with MC68HC908QY2 and MC68HC908QY4. Differences lie in Flash size (4 KB vs. 8 KB vs. 16 KB) and RAM (192 B vs. 256 B vs. 384 B), but all share the same peripheral register map, interrupt vector table, and electrical characteristics. Firmware written for the MCHC908QY1VDWE can run unmodified on higher-memory variants within the same package.