NXP Semiconductors MC68HC908QY2CP

Overview

MC68HC908QY2CP from Freescale Semiconductor is an 8-bit HCS08-core microcontroller with 2 KB FLASH, 128 B RAM, integrated 8-channel 8-bit ADC, on-chip oscillator, and 16-pin SOIC package. It supports low-power wait/stop modes, keyboard interrupt, auto-wakeup, and COP watchdog - designed for cost-sensitive embedded control in appliance user interfaces and industrial sensor nodes.

For engineers reviewing the MC68HC908QY2CP datasheet, MC68HC908QY2CP pinout, MC68HC908QY2CP application, or MC68HC908QY2CP equivalent, key selection criteria include its 16-pin SOIC footprint, internal RC oscillator trim capability, 8-bit ADC with 8 input channels, COP timeout range (0.5–1024 ms), and support for monitor mode debugging via single-wire background interface.

Technical Context

The MC68HC908QY2CP implements the M68HC08 CPU core with 16-bit address bus, supporting up to 64 KB memory space. Its oscillator module includes a factory-trimmed internal RC oscillator (typically 4.2 MHz ±2% at V_DD = 5 V, T_A = 25°C) and supports external crystal or RC configurations.

Peripheral integration includes a 16-bit Timer Interface Module (TIM) with input capture/output compare, Keyboard Interrupt Module (KBI) with 8 programmable wake-up inputs, and Low-Voltage Inhibit (LVI) with selectable trip points (4.05 V or 3.75 V). All modules operate under unified SIM control with shared reset and clock gating logic.

Key Specifications

Pinout & Package

MC68HC908QY2CP is housed in a 16-pin SOIC package (JEDEC MS-012AC, 300 mil body width) with 1.27 mm pitch. Pin 1 is marked by notch or dot; pin numbering follows standard counter-clockwise convention.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MC68HC908QY4CP and MC9RS08KA2CP, the MC68HC908QY2CP offers optimal balance of cost, integrated peripherals (KBI, AWU, COP), and proven field reliability in resource-constrained control applications - especially where keypad interface and ultra-low-power periodic wake-up are essential.

Availability

MC68HC908QY2CP is available at Aetrix Electronics and suitable for home appliance control panels, industrial sensor nodes, and smart power outlets requiring stable component supply across multi-year production cycles.

Supply support for MC68HC908QY2CP 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 (now part of NXP Semiconductors) is a global leader in embedded processing solutions, specializing in automotive, industrial, and consumer microcontrollers.

The MC68HC908QY2CP belongs to the M68HC08 family - designed specifically for cost-optimized, low-pin-count embedded control applications demanding high integration, low power, and robust debug capabilities.

FAQ

What is the maximum operating frequency of the MC68HC908QY2CP?

The MC68HC908QY2CP supports a maximum bus clock frequency of 20 MHz when using the BUSCLKX4 option with the internal oscillator running at 5 MHz. Its factory-trimmed internal RC oscillator operates at 4.2 MHz ±2% at 5 V and 25°C, and can be adjusted via the OSCTRIM register. External crystal or RC sources up to 8 MHz are also supported.

Does the MC68HC908QY2CP support in-circuit programming?

Yes, the MC68HC908QY2CP supports in-system programming via its single-wire background debug interface (BDM). This allows full FLASH erase, program, and verify operations without removing the device from the PCB. Programming requires only V_DD, V_SS, and the BKGD pin - no external high-voltage signals or dedicated programming header.

How many analog input channels does the ADC in the MC68HC908QY2CP support?

The MC68HC908QY2CP integrates an 8-bit successive-approximation ADC with 8 configurable analog input channels (AN0–AN7), mapped to Port A pins PTA0–PTA7. Each channel supports software-selectable reference (V_DD or internal bandgap) and conversion trigger via software, timer, or external event.

What low-power modes are available on the MC68HC908QY2CP?

The MC68HC908QY2CP supports two hardware low-power modes: Wait Mode (CPU halted, peripherals active, RAM retained) and Stop Mode (all clocks stopped except AWU RC oscillator, RAM lost). The Auto Wakeup Module (AWU) provides programmable wake-up intervals from 16 ms to 4.2 s in Stop Mode.

Is the MC68HC908QY2CP pin-compatible with other devices in the QY/QT family?

Yes, the MC68HC908QY2CP shares identical pinout and electrical characteristics with MC68HC908QY1CP, MC68HC908QY4CP, MC68HC908QT1CP, MC68HC908QT2CP, and MC68HC908QT4CP in the 16-pin SOIC package variant. Firmware and hardware designs are interchangeable across these parts, differing only in FLASH size (1 KB, 2 KB, or 4 KB) and oscillator configuration options.