NXP Semiconductors MC68HC908QY2MDTE

Overview

MC68HC908QY2MDTE from NXP (formerly Freescale) is an 8-bit HCS08-core microcontroller in a 16-pin SOIC package, featuring 2 KB on-chip FLASH, 128 bytes RAM, 8-channel 8-bit ADC, internal RC oscillator (1–8 MHz), and integrated LVI, COP, and keyboard interrupt modules. It targets low-cost embedded control in battery-powered consumer and industrial sensors.

For engineers reviewing the MC68HC908QY2MDTE datasheet, MC68HC908QY2MDTE pinout, MC68HC908QY2MDTE application, or MC68HC908QY2MDTE equivalent, key selection criteria include its 16-pin SOIC footprint, 2 KB FLASH/128 B RAM memory map, 8-bit ADC with 8 input channels, internal oscillator trim capability, and support for WAIT/STOP low-power modes - all critical for space-constrained, cost-sensitive MCU designs.

Technical Context

The MC68HC908QY2MDTE implements the M68HC08 CPU core with 16-bit address bus and Harvard architecture, executing instructions at up to 8 MHz bus clock derived from its internal RC oscillator or external crystal. Its System Integration Module (SIM) integrates reset generation, clock control, and interrupt vectoring with priority-based IRQ handling.

Peripheral integration includes a 4-channel 16-bit Timer Interface Module (TIM) with input capture/output compare, a Keyboard Interrupt Module (KBI) supporting up to 8-key matrix scanning, and a Low-Voltage Inhibit (LVI) circuit with programmable trip point (2.5 V or 3.0 V) and hysteresis - enabling robust operation across varying supply conditions.

Key Specifications

Pinout & Package

MC68HC908QY2MDTE is housed in a 16-pin SOIC (Small Outline Integrated Circuit) package with 1.27 mm pitch, compatible with standard surface-mount assembly processes and reflow profiles.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MC68HC908QY2MDTE, the MC68HC908QT2CDTE removes ADC functionality to reduce cost for pure digital control, while the MC9RS08KA2CFD offers newer architecture but sacrifices KBI and LVI - making MC68HC908QY2MDTE uniquely balanced for low-cost, analog-capable, battery-aware embedded control.

Availability

MC68HC908QY2MDTE is available at Aetrix Electronics and suitable for home appliance control, industrial sensor nodes, consumer remote controls, and point-of-sale peripherals requiring stable component supply and long-term manufacturability.

Supply support for MC68HC908QY2MDTE 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 specializing in secure connectivity solutions for automotive, industrial, and IoT applications, with roots in Freescale's embedded controller heritage.

The MC68HC908QY/QT family was designed for cost-sensitive, low-power 8-bit control applications requiring integrated analog interfaces, robust reset supervision, and minimal external components - especially in white goods and portable electronics.

FAQ

What is the maximum operating frequency of the MC68HC908QY2MDTE?

The MC68HC908QY2MDTE supports a maximum bus clock frequency of 8 MHz, achievable either via its trimmed internal RC oscillator or an external crystal/clock source. This frequency determines instruction execution speed and ADC conversion rate, with typical performance delivering ~2 million instructions per second (MIPS) at 8 MHz bus clock.

Does the MC68HC908QY2MDTE include a hardware watchdog timer?

Yes, the MC68HC908QY2MDTE includes a Computer Operating Properly (COP) watchdog timer with user-selectable timeout intervals ranging from 0.5 ms to 1.0 s. The COP module resets the device if not periodically cleared by firmware, preventing system lockup due to software faults or electromagnetic interference.

Can the MC68HC908QY2MDTE operate from a single 3.3 V supply?

Yes, the MC68HC908QY2MDTE operates across a supply voltage range of 2.7 V to 5.5 V, fully supporting 3.3 V nominal systems. Its internal LVI circuit can be configured for 3.0 V trip point, ensuring reliable brown-out detection and reset assertion within 3.3 V logic domains.

How many analog input channels does the ADC in the MC68HC908QY2MDTE support?

The MC68HC908QY2MDTE features an 8-channel 8-bit successive-approximation ADC, with inputs mapped to PTA0–PTA3 (AN0–AN3) and PTB0–PTB3 (AN4–AN7). All eight channels are accessible simultaneously in software-controlled scan mode, enabling multi-sensor monitoring without external multiplexing.

Is the MC68HC908QY2MDTE pin-compatible with other devices in the QY/QT family?

Yes, the MC68HC908QY2MDTE shares identical 16-pin SOIC pinout and electrical characteristics with MC68HC908QY4MDTE and MC68HC908QT2CDTE, enabling drop-in replacement within the same package variant. However, functional differences - such as ADC presence or KBI configuration - require firmware validation before substitution.