NXP Semiconductors MC908EY8MFAE

Overview

MC908EY8MFAE from NXP Semiconductors (formerly Freescale) is an 8-bit HCS08 microcontroller with 8 KB Flash, 512 B RAM, and integrated ADC, ESCI, SPI, TIMA/TIMB, BEMF counter, and LVI protection - designed for motor control and embedded sensor interface applications in industrial and appliance systems.

For engineers reviewing the MC908EY8MFAE datasheet, MC908EY8MFAE pinout, MC908EY8MFAE application, or MC908EY8MFAE equivalent, this page delivers verified technical context, package mapping, functional pin roles, real-world use cases, and validated alternative options for design-in and supply continuity.

Technical Context

The MC908EY8MFAE implements the HCS08 CPU core with 20 MHz max bus frequency, internal clock generator (ICG) supporting DCO-based trimming and external crystal/oscillator modes, and dual timer modules (TIMA/TIMB) with input capture, output compare, and PWM capabilities. It integrates a 10-bit ADC with 8 channels and programmable sample time.

Its peripheral set includes ESCI (UART), SPI, keyboard interrupt (KBD) matrix scan, BEMF counter for brushless DC motor commutation, and COP watchdog with configurable timeout. Low-power operation is supported via WAIT and STOP modes with selective peripheral wake-up.

Key Specifications

Pinout & Package

MC908EY8MFAE is housed in a 48-pin QFP (Quad Flat Package) with 0.5 mm pitch, measuring 7 mm × 7 mm. The package supports reflow soldering and provides full I/O access for mixed-signal control applications.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MC908EY16MFAE, the MC908EY8MFAE trades Flash capacity for lower unit cost while retaining identical peripherals and footprint - ideal for fixed-function applications. Versus S9KEAZ128AMLH, it offers proven reliability and minimal BOM impact but lacks ARM ecosystem advantages.

Availability

MC908EY8MFAE is available at Aetrix Electronics and suitable for industrial motor control, smart appliance interface, and embedded sensor node applications requiring stable component supply across multi-year production cycles.

Supply support for MC908EY8MFAE 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 markets, with deep heritage in microcontroller innovation.

The MC908EY8MFAE belongs to the HCS08 family - engineered for cost-effective, low-power embedded control in motor-driven and human-interface applications where deterministic timing and analog integration are critical.

FAQ

What is the maximum operating frequency of the MC908EY8MFAE?

The MC908EY8MFAE features an HCS08 CPU core with a maximum bus frequency of 20 MHz. This is achieved using the internal clock generator (ICG) with DCO trimming or an external crystal oscillator. The actual instruction throughput depends on the selected clock source and bus divider settings, but the core reliably executes code at this rate under specified voltage and temperature conditions. MC908EY8MFAE maintains timing integrity across its full 2.7–5.5 V operating range.

Does the MC908EY8MFAE support in-circuit programming?

Yes, the MC908EY8MFAE supports in-circuit programming via its background debug mode (BDM) interface using standard Freescale/NXP BDM tools. The on-chip 8 KB Flash memory can be erased and reprogrammed in-system without removing the device from the PCB. Programming requires the dedicated BKGD pin and compatible debugger hardware; no external high-voltage programming signals are needed. MC908EY8MFAE retains full functionality during and after programming cycles.

How many ADC channels does the MC908EY8MFAE provide, and what is their resolution?

The MC908EY8MFAE integrates a 10-bit successive-approximation ADC with 8 multiplexed input channels (AD0–AD7), accessible via Port B pins PTB0–PTB7. Conversion results are stored in 16-bit registers (ADRH/ADRL) and support left/right justification modes. The ADC operates across the full 2.7–5.5 V supply range with typical INL of ±1 LSB and supports both single-shot and continuous conversion modes. MC908EY8MFAE ADC performance is characterized per Freescale datasheet Rev. 10.

What low-power modes are available on the MC908EY8MFAE?

The MC908EY8MFAE supports WAIT and STOP low-power modes. In WAIT mode, the CPU halts while peripherals (ADC, timers, ESCI) remain active and can generate interrupts to wake the core. In STOP mode, the oscillator is disabled and only asynchronous events (IRQ, KBD, BEMF, reset) can restore operation. Both modes reduce current consumption significantly - down to ~10 µA in STOP - while preserving RAM contents and register states. MC908EY8MFAE exit latency and wake-source configuration are fully documented in the SIM and ICG chapters.

Is the MC908EY8MFAE pin-compatible with other members of the EY series?

Yes, the MC908EY8MFAE is pin-compatible with the MC908EY16MFAE and shares identical 48-pin QFP packaging, pin assignments, and I/O functionality. All EY-series devices in the MFAE suffix use the same mechanical footprint and electrical pinout, enabling direct substitution where Flash size permits. This compatibility simplifies design reuse and migration paths. MC908EY8MFAE maintains full functional equivalence for all shared peripherals including ADC, ESCI, SPI, TIMA/TIMB, and BEMF modules.