NXP Semiconductors MC68HC908EY16MFA

Overview

MC68HC908EY16MFA from NXP (formerly Freescale) is an 8-bit HCS08-core microcontroller with 16 KB on-chip Flash memory, 512 B RAM, and integrated peripherals including 10-bit ADC, ESCI, SPI, dual timers (TIMA/TIMB), BEMF counter, and keyboard interrupt module. It operates at up to 8 MHz bus frequency and supports automotive-grade temperature range (–40°C to +125°C) in a 44-pin QFP package.

For engineers reviewing the MC68HC908EY16MFA datasheet, MC68HC908EY16MFA pinout, MC68HC908EY16MFA application, or MC68HC908EY16MFA equivalent, key selection criteria include Flash endurance (100k erase/write cycles), internal clock generator trim capability, LVI reset threshold (typically 2.5 V), and support for low-power wait/stop modes in motor control and sensor interface designs.

Technical Context

The MC68HC908EY16MFA implements the HCS08 CPU core with 16-bit address space, 8-bit data path, and enhanced instruction set including bit manipulation and indexed addressing. Its Internal Clock Generator (ICG) integrates a digitally controlled oscillator (DCO), modulo-N divider, and frequency comparator for precise internal clock synthesis without external crystal.

Peripheral integration includes a 10-bit successive-approximation ADC with 8 input channels, ESCI supporting asynchronous full-duplex UART operation, and dedicated BEMF counter for brushless DC motor commutation timing. All modules are memory-mapped and accessible via standard I/O registers with configurable interrupt vectors.

Key Specifications

Pinout & Package

MC68HC908EY16MFA is housed in a 44-pin Quad Flat Package (QFP) with 0.8 mm lead pitch and exposed thermal pad. Package dimensions are 10 × 10 × 1.4 mm (L × W × H), compliant with JEDEC MS-026.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MC9RS08KA8CFD and S9KEAZ128AMLH, the MC68HC908EY16MFA delivers optimal balance of mature HCS08 toolchain support, hardware BEMF acceleration, and automotive-grade reliability - making it uniquely suited for cost-constrained, high-volume BLDC motor control where deterministic timing is critical.

Availability

MC68HC908EY16MFA is available at Aetrix Electronics and suitable for automotive body control, industrial motor drives, appliance control units, and sensor interface modules requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for MC68HC908EY16MFA 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.

The MC68HC908EY16MFA belongs to the legacy HCS08 microcontroller family, designed specifically for cost-sensitive, real-time embedded control in automotive and industrial motor systems with emphasis on analog integration and low-power operation.

FAQ

What is the maximum operating frequency of the MC68HC908EY16MFA?

The MC68HC908EY16MFA supports a maximum bus frequency of 8 MHz. This is derived from its internal clock generator's DCO output divided by the modulo-N divider. The actual core instruction execution rate depends on the selected bus prescaler; most instructions execute in 1–3 bus cycles. The MC68HC908EY16MFA maintains timing integrity across its full –40°C to +125°C operating range due to factory-trimmed ICG calibration.

Does the MC68HC908EY16MFA include a hardware BEMF counter?

Yes, the MC68HC908EY16MFA includes a dedicated BEMF Counter Module (BEMF) that detects back-EMF zero-crossing events on motor windings. This hardware accelerator eliminates the need for software-based edge detection and enables precise, jitter-free commutation timing in sensorless BLDC motor applications - a key differentiator versus general-purpose MCUs without this feature.

What packaging and pin count does the MC68HC908EY16MFA use?

The MC68HC908EY16MFA is supplied in a 44-pin Quad Flat Package (QFP) with 0.8 mm lead pitch and an exposed thermal pad. This package supports reflow soldering and provides mechanical stability for automotive vibration environments. Pin assignments include dedicated tachometer inputs (TACH0/TACH1), ESCI serial lines (TxD/RxD), and 8-channel ADC inputs mapped to Port B pins - all documented in Chapter 1.4 of the MC68HC908EY16MFA datasheet.

How many Flash erase/write cycles does the MC68HC908EY16MFA support?

The MC68HC908EY16MFA guarantees 100,000 erase/write cycles for its 16 KB on-chip Flash memory. Each Flash block can be independently protected via the FLASH Block Protect Register (FBPROT), allowing selective locking of bootloader or calibration sections. Endurance testing was performed per JEDEC JESD22-A117, and wear-leveling must be implemented in firmware if field updates exceed cycle limits in specific sectors.

Is the MC68HC908EY16MFA qualified for automotive applications?

Yes, the MC68HC908EY16MFA is AEC-Q100 qualified for automotive applications. It meets Grade 1 specifications (–40°C to +125°C ambient operating temperature), includes Low-Voltage Inhibit (LVI) with hysteresis, COP watchdog, and robust ESD protection (±2 kV HBM). Its Flash memory and I/O structures are validated for automotive longevity requirements, and the part number suffix "MFA" explicitly denotes the automotive-grade variant with extended temperature screening.