MC68HC908QY4MDTE
MC68HC908QY4MDTE - 8-bit HC08 MCU 4KB Flash 16-TSSOP | NXP
The NXP MC68HC908QY4MDTE is a member of the low-cost, high-performance M68HC08 Family of 8-bit microcontroller units (MCUs) with 4KB of Flash program memory, an integrated ADC, and 13 general-purpose I/O pins, housed in a 16-pin TSSOP package. It features a CPU08 core running at up to 8 MHz bus frequency, 128 bytes of RAM, and built-in peripherals including Low-Voltage Detect (LVD), Power-On Reset (POR), and a PWM module, making it suitable for automotive under-hood and industrial control applications.
An 8-bit microcontroller (MCU) is a single-chip computer that integrates a CPU, memory (RAM and non-volatile program memory), and peripherals on a single die, designed for embedded control tasks where deterministic behavior and low cost are primary requirements. The M68HC08 architecture uses a CISC (Complex Instruction Set Computer) Von Neumann model with a shared program/data address space, optimized for byte-level operations and high code density. Within the broader taxonomy, 8-bit MCUs sit below 16-bit MCUs (e.g., HC12) and 32-bit MCUs (e.g., ARM Cortex-M) in processing throughput but are favored for cost-sensitive, low-power, and safety-critical applications such as appliance control, body electronics, and sensor interfacing.
Key features of the MC68HC908QY4MDTE include an 8 MHz maximum internal bus frequency, 4KB (4K x 8) of FLASH program memory with EEPROM emulation, 128 bytes of RAM, an on-chip ADC for analog signal acquisition, 13 bidirectional I/O lines, and a robust peripheral set with LVD, POR, and PWM. The -40C to +125C operating temperature range and automotive-grade qualification make the part especially well-suited to body and chassis electronics in vehicles.
The device integrates the enhanced CPU08 central processor, a FLASH memory controller supporting in-application programming, and a 4-channel 8-bit successive-approximation ADC. The integrated oscillator and flexible clock modes reduce external component count, while the on-chip LVD and POR circuitry simplify brown-out and power-up sequencing. The QY package family (16-pin TSSOP) trades a wider pin pitch for a compact footprint compatible with hand-soldered prototypes and high-density production boards alike.
Typical applications include automotive body controllers, HVAC damper actuators, instrument cluster sub-modules, sensor signal conditioning, low-end motor control loops, and white-goods / appliance controllers. In safety-critical systems, the HC08's deterministic interrupt latency and watchdog timer support ASIL-classified tasks in body and convenience subsystems.
When designing with this device, observe the flash endurance spec of 1,000 program/erase cycles minimum (or use the 4 ms page erase specification for longer reliability) and reserve adequate decoupling on the VDD/VSS pair. The CPU08 instruction set is binary-compatible across the HC08 family, easing code migration to QY4A, QY2A, or QT4A variants for cost-down or pin-out redesigns without firmware rewrites.
This page synthesizes distributor pricing, drop-in TSSOP-16 alternatives, and practical design notes not found in the manufacturer datasheet alone.
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