NXP Semiconductors MC908QY2CDTER

Overview

MC908QY2CDTER from Freescale Semiconductor is an 8-bit M68HC08 core microcontroller with 2 KB FLASH, 128 B RAM, 8-channel 8-bit ADC, on-chip internal oscillator (4 MHz typical), and 16-pin SOIC package. It integrates COP watchdog, LVI reset protection, keyboard interrupt, and auto-wakeup for low-power sensor interface applications in industrial controls and appliance panels.

For engineers reviewing the MC908QY2CDTER datasheet, MC908QY2CDTER pinout, MC908QY2CDTER application, or MC908QY2CDTER equivalent, key selection criteria include its 2 KB FLASH size, 8-pin analog input capability, internal RC oscillator trim support, and SOIC-16 thermal performance in ambient temperatures up to +85°C.

Technical Context

The MC908QY2CDTER implements the M68HC08 CPU core with 16-bit address bus, supporting up to 64 KB memory space. Its oscillator module provides selectable clock sources: internal RC (4 MHz ±20%), external crystal (up to 8 MHz), or external clock input via OSC1/OSC2 pins.

It features a 16-bit Timer Interface Module (TIM) with input capture, output compare, and PWM generation; a Keyboard Interrupt Module (KBI) supporting up to 8-key matrix scan; and a Low-Voltage Inhibit (LVI) circuit with programmable trip point (2.5 V or 3.0 V) and hysteresis.

Key Specifications

Pinout & Package

MC908QY2CDTER is housed in a 16-pin SOIC package (JEDEC MS-012AC) with 1.27 mm lead pitch and 300 mil body width. Thermal resistance θ_JA is 100°C/W under standard PCB layout conditions.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MC908QY2CDTER, the QY4 offers double FLASH capacity without layout change, while the QT2 reduces feature count and cost but removes KBI - making it viable only where matrix input is absent and firmware size is tightly constrained.

Availability

MC908QY2CDTER is available at Aetrix Electronics and suitable for appliance control panels, industrial sensor nodes, smart power outlets, and legacy equipment retrofit controllers requiring stable component supply and long-term manufacturability.

Supply support for MC908QY2CDTER 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) designed high-reliability, cost-optimized microcontrollers for automotive, industrial, and consumer applications.

The MC68HC908QY/QT family was engineered for space-constrained, low-power embedded systems needing integrated analog peripherals, robust reset supervision, and simple development tooling - targeting appliance HMI and sensor interface roles.

FAQ

What is the maximum operating frequency of the MC908QY2CDTER?

The MC908QY2CDTER supports a maximum bus clock frequency of 4 MHz derived from its internal RC oscillator (trimmable to ±2% accuracy) or external crystal/clock source up to 8 MHz. At 4 MHz bus clock, instruction execution averages 1 µs per cycle, enabling real-time response in sub-millisecond control loops. The device does not support PLL multiplication or higher-frequency modes beyond this specification.

Does the MC908QY2CDTER support in-system programming (ISP)?

Yes, the MC908QY2CDTER supports in-system programming via its Monitor (MON) mode using only the VDD, RESET, and BKGD pins. No high-voltage programming signal is required. Firmware updates can be performed in-circuit with standard UART or custom serial protocol, leveraging the on-chip 2 KB FLASH and built-in command interpreter - eliminating need for external programmers in production or field service.

How many ADC channels does the MC908QY2CDTER have, and what is their resolution?

The MC908QY2CDTER integrates an 8-bit successive approximation ADC with 8 input channels (PTB0–PTB7). Conversion time is fixed at 25 µs per sample, with integral nonlinearity specified at ±1 LSB. Input voltage range is 0 V to VDD, and the ADC shares Port B pins - requiring careful pin multiplexing planning during PCB layout and firmware initialization.

What low-power modes are available on the MC908QY2CDTER?

The MC908QY2CDTER supports WAIT and STOP low-power modes. In WAIT mode, the CPU halts but peripherals (ADC, TIM, KBI) remain active; in STOP mode, all clocks stop except the AWU's 32.768 kHz oscillator, reducing current draw to ~1 µA. Both modes support wake-up via IRQ, KBI, or AWU timeout - enabling battery life extension in intermittent-sensing applications.

Is the MC908QY2CDTER pin-compatible with other members of the QY/QT family?

Yes, the MC908QY2CDTER is pin-compatible with MC908QY4CDTER and MC908QT2CDTER in the 16-pin SOIC package. All share identical pin assignments for VDD, VSS, RESET, IRQ, OSC1, OSC2, and Port A/B I/O. This allows hardware reuse across variants - for example, designing one PCB that supports QY2 (2 KB), QY4 (4 KB), or QT2 (no KBI) via firmware and BOM selection.