NXP Semiconductors MC68HC908QY2CDTE

Overview

MC68HC908QY2CDTE from NXP (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 package. It integrates COP watchdog, LVI reset protection, keyboard interrupt, and auto-wakeup for low-power embedded control in industrial sensors and appliance interfaces.

For engineers reviewing the MC68HC908QY2CDTE datasheet, MC68HC908QY2CDTE pinout, MC68HC908QY2CDTE application, or MC68HC908QY2CDTE equivalent, key selection criteria include its 16-pin SOIC footprint, 2 KB on-chip FLASH with block protection, 8-bit ADC with software-selectable clock prescaler, and native support for monitor mode programming without high-voltage entry.

Technical Context

The MC68HC908QY2CDTE 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 (4.2 MHz ±25%), external crystal (up to 8 MHz), or external clock input via OSC1.

Peripheral integration includes 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 a Low-Voltage Inhibit (LVI) circuit with programmable trip points (2.5 V or 3.0 V) and hysteresis.

Key Specifications

Pinout & Package

MC68HC908QY2CDTE is housed in a 16-pin SOIC package (case #751A-03) with 1.27 mm pitch, 10.3 mm × 7.5 mm body size, and standard JEDEC MS-012AC outline. Pin functions are validated per Freescale MC68HC908QY/QT Family Data Sheet, Rev. 6 (2010), Figure 1-2 and Table 1-2.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MC9RS08KA2CSC, MC68HC908QY2CDTE delivers hardware KBI and proven HCS08 toolchain support; versus MC68HC908QY4CDTE, it offers identical functionality at lower FLASH cost-ideal for memory-constrained, cost-sensitive deployments.

Availability

MC68HC908QY2CDTE is available at Aetrix Electronics and suitable for industrial sensor nodes, home appliance control panels, and smart power outlets requiring stable component supply across extended product lifecycles.

Supply support for MC68HC908QY2CDTE 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 delivering secure, scalable solutions for automotive, industrial, IoT, and communication infrastructure markets.

The MC68HC908QY/QT family was designed for cost-sensitive, low-power embedded control applications where small footprint, integrated peripherals, and field-programmable FLASH are essential-targeting appliances, sensors, and legacy equipment upgrades.

FAQ

What is the maximum operating frequency of the MC68HC908QY2CDTE?

The MC68HC908QY2CDTE supports a maximum bus clock frequency of 4.2 MHz from its internal RC oscillator. When using an external crystal or clock source, the device operates up to 8 MHz bus clock, limited by the HCS08 core's timing specification and electrical characteristics in the 2.7–5.5 V supply range. The actual achievable frequency depends on configuration register settings and external component selection.

Does the MC68HC908QY2CDTE support in-circuit programming?

Yes, the MC68HC908QY2CDTE supports in-circuit programming via its single-wire background debug interface in Monitor Mode. This allows full FLASH read/write/erase operations without high-voltage programming signals-only VDD, VSS, and BKGD pins are required. The process is documented in Chapter 15 of the MC68HC908QY/QT Family Data Sheet, Rev. 6.

What peripherals are included in the MC68HC908QY2CDTE?

The MC68HC908QY2CDTE integrates an 8-channel 8-bit ADC, Keyboard Interrupt Module (KBI) for hardware matrix scanning, 16-bit Timer Interface Module (TIM) with input capture and output compare, Computer Operating Properly (COP) watchdog, Low-Voltage Inhibit (LVI), Auto Wakeup Module (AWU), and internal 4.2 MHz RC oscillator-all accessible through its 16-pin SOIC package.

Is the MC68HC908QY2CDTE pin-compatible with other QY/QT family members?

Yes, the MC68HC908QY2CDTE shares identical pinout and package with MC68HC908QY4CDTE and MC68HC908QT2CDTE. All three use the same 16-pin SOIC footprint and assign identical functions to each pin (e.g., PTA0–PTA7, PTB0–PTB3, IRQ, RESET). Differences lie in FLASH size (2 KB vs. 4 KB) and oscillator configuration options-not physical connectivity.

What development tools support the MC68HC908QY2CDTE?

The MC68HC908QY2CDTE is supported by the CodeWarrior Development Studio for HCS08 (legacy), as well as open-source tools like naken_asm and hc08-gcc. Hardware debuggers include the P&E Micro USB-ML-HCS08 and compatible BDM interfaces. Freescale Application Note AN2294 details monitor mode entry sequences and flash programming procedures specific to the MC68HC908QY2CDTE.