MC908EY8AMFJE - 8KB Flash HC08 8-Bit MCU, 32-LQFP | NXP
MPN: MC908EY8AMFJE ✗ End of Life| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $12.5 | $12.50 |
| 10 | $11.2 | $112.00 |
| 100 | $9.8 | $980.00 |
| 500 | $8.4 | $4,200.00 |
| 1,000 | $7.1 | $7,100.00 |
MC908EY8AMFJE Overview
An 8-bit microcontroller (MCU) is a microprocessor core that processes data 8 bits at a time, typically used in embedded systems where low cost, deterministic timing, and peripheral integration outweigh raw compute throughput. Within the broader semiconductor hierarchy, an 8-bit MCU sits below a microcontroller family (HC08 -> Freescale/NXP HC -> 8-bit embedded controller -> integrated circuit). The HC08 core pioneered modern flash-friendly 8-bit designs and remains widely deployed in long-life automotive and industrial platforms where software stability across decades matters more than performance benchmarking.
Key features of the MC908EY8AMFJE include two 16-bit 2-channel timers (TIMA and TIMB) with PWM, a serial peripheral interface (SPI), a serial communications interface (SCI), power-on reset (POR), low-voltage inhibit (LVI), and an internal clock generator that eliminates the external crystal in many designs. The Flash memory supports in-application reprogramming via the built-in monitor ROM, simplifying field firmware updates.
The MC908EY8AMFJE uses the M68HC08 instruction set with a von Neumann bus architecture and an internal bus frequency up to 8 MHz at 5V, giving roughly 1 MIPS of integer throughput. The ICG module provides a stable internal reference and supports trimming for accuracy, removing an external resonator in cost-driven designs. The 24 GPIO pins are multiplexed with timer, SCI, SPI, and interrupt functions.
Typical applications include automotive body controllers, instrument clusters, HVAC flap and blower control, seat and mirror actuators, simple sensor interfaces, and low-end consumer appliances where LIN or SCI network connectivity is required.
When designing with this part, note that the part is now marked Obsolete by NXP; long-life production systems should qualify a successor such as the S08 family. Ensure supply decoupling follows the datasheet's recommended 100 nF + bulk capacitor placement near the VDD pins.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found on a single manufacturer datasheet page, including cross-brand cross-references validated against the Verified Web Data set.
Drop-in alternatives for MC908EY8AMFJE — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with MC908EY8AMFJE (same form factor and footprint) — differing in Peripherals, Program Memory Size, RAM Size, Supply Voltage, EEPROM Size.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
MC908EY16AMFJE
✅ Drop-In✓ In Stock
$5.2 / Unit
View Datasheet →MC908EY8ACFJE
✅ Drop-In📋 Reference alternative (not in catalog)
MC908EY8CFAE
✅ Drop-In✓ In Stock
$4.61 / Unit
View Datasheet →MC68HC908EY8AMFJE
✅ Drop-In📋 Reference alternative (not in catalog)
MC908AP32ACFQE
✅ Drop-In📋 Reference alternative (not in catalog)
MC908EY8AMFJE Maximum Ratings & Electrical Characteristics
| Core Processor | HC08 |
| Core Size | 8-bit |
| Program Memory Size | 8 KB (8K x 8) |
| Program Memory Type | FLASH |
| RAM Size | 512 B (512 x 8) |
| EEPROM Size | Not present |
| Number of I/O | 24 |
| Maximum Clock Frequency | 8 MHz internal bus |
| Connectivity | LINbus, SCI, SPI |
| Peripherals | POR, PWM, LVI |
| Timers | 2 x 16-bit, 2-channel (TIMA, TIMB) with PWM |
| Oscillator Type | Internal (ICG) |
| Package / Case | 32-LQFP (7x7 mm) |
| Mounting Type | Surface Mount |
| Packaging | Tray |
| Series | HC08 |
| Operating Voltage | 5 V typical |
MC908EY8AMFJE Pin Configuration
| Pin 1 | PTA0/TCLK — Port A bit 0 / Timer A clock input |
| Pin 2 | PTA1 — Port A bit 1 |
| Pin 3 | PTA2 — Port A bit 2 |
| Pin 4 | PTA3 — Port A bit 3 |
| Pin 5 | PTA4 — Port A bit 4 |
| Pin 6 | PTA5 — Port A bit 5 |
| Pin 7 | VSS — Ground |
| Pin 8 | VDD — Power supply |
| Pin 9 | PTB0 — Port B bit 0 |
| Pin 10 | PTB1 — Port B bit 1 |
| Pin 11 | PTB2 — Port B bit 2 |
| Pin 12 | PTB3 — Port B bit 3 |
| Pin 13 | PTB4 — Port B bit 4 |
| Pin 14 | PTB5 — Port B bit 5 |
| Pin 15 | PTC0 — Port C bit 0 |
| Pin 16 | PTC1 — Port C bit 1 |
| Pin 17 | PTC2 — Port C bit 2 |
| Pin 18 | PTC3 — Port C bit 3 |
| Pin 19 | PTC4 — Port C bit 4 |
| Pin 20 | PTC5 — Port C bit 5 |
| Pin 21 | PTD0/RxD — Port D bit 0 / SCI receive |
| Pin 22 | PTD1/TxD — Port D bit 1 / SCI transmit |
| Pin 23 | PTD2/MISO — Port D bit 2 / SPI MISO |
| Pin 24 | VDD — Power supply (second VDD) |
| Pin 25 | VSS — Ground (second VSS) |
| Pin 26 | PTD3/MOSI — Port D bit 3 / SPI MOSI |
| Pin 27 | PTD4/SPSCK — Port D bit 4 / SPI clock |
| Pin 28 | PTD5/ICGOUT — Port D bit 5 / ICG output |
| Pin 29 | RST — Reset input (active low) |
| Pin 30 | IRQ — External interrupt request |
| Pin 31 | OSC1 — Crystal oscillator input |
| Pin 32 | OSC2 — Crystal oscillator output |
Typical Applications
MC908EY8AMFJE is suitable for 6 applications: Automotive Body Controller, HVAC Flap and Blower Control, Instrument Cluster Indicator, Seat and Mirror Actuator Module, Industrial Sensor Interface Node, Low-End Consumer Appliance Controller.
Automotive Body Controller
The MC908EY8AMFJE suits automotive body modules because its LINbus connectivity, 24 GPIO pins, and two 16-bit PWM timers can drive lamp, wiper, and door-lock actuators. With 8 KB of Flash and 512 B RAM it fits cost-sensitive nodes running a small RTOS or simple scheduler, while the internal clock generator eliminates a crystal to reduce BOM cost. The integrated LVI module prevents code corruption during crank-and-start brown-out events.
Recommended
HVAC Flap and Blower Control
HVAC modules use the MC908EY8AMFJE to drive mixed-air stepper or DC blower motors through the integrated PWM timers and 24 GPIOs. The SCI peripheral interfaces with the HVAC control panel, while the 8 KB Flash easily fits typical flap control tables. The internal ICG keeps the bill of materials low, and the small LQFP-32 package simplifies the compact module housing used behind the dashboard.
Recommended
Instrument Cluster Indicator
The MC908EY8AMFJE powers low-end instrument cluster sub-displays where it reads sensor inputs via the ADC channels, drives LEDs via PWM, and serial-links to the main cluster MCU over SCI. The 8 MHz internal bus and 512 B RAM are sufficient for indicator control, while the LINbus support enables keypad backlighting and telltale sharing. The Flash memory supports in-field firmware updates through the monitor mode bootloader.
Recommended
Seat and Mirror Actuator Module
Body-electronics seat and mirror modules rely on the MC908EY8AMFJE's PWM channels to control motor speed and direction through external H-bridge drivers. The 24 GPIO pins are multiplexed to read position switches and Hall sensors while SPI/SCI handles communication with the body controller. AEC-qualified temperature grades and the small LQFP footprint are well matched to the under-seat and door-mirror mechanical envelope.
Recommended
Industrial Sensor Interface Node
Industrial sensor hubs use the MC908EY8AMFJE to aggregate analog sensor data, perform basic linearization in firmware, and forward the result to a master PLC over SCI or LIN. The 8 KB Flash and 512 B RAM cover compact signal-conditioning code, while two 16-bit timers handle PWM excitation for ratiometric sensors. The internal ICG and integrated LVI simplify the power architecture in 24 V industrial environments.
Recommended
Low-End Consumer Appliance Controller
The MC908EY8AMFJE fits small kitchen and white-goods controllers where 8-bit throughput is adequate for user-input handling, indicator LED driving, and a UART link to an inverter or display. The integrated PWM channels control simple brushless or brushed DC loads, while the 8 KB Flash easily accommodates state-machine control firmware. The small 32-LQFP package and the internal clock generator minimize BOM cost in mass-market appliances.
Recommended
Recommended Products Summary
Engineering reference data for MC908EY8AMFJE — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | MC908EY16AMFJE | MC908EY8ACFJE | MC908EY8CFAE | MC68HC908EY8AMFJE | MC908AP32ACFQE |
|---|---|---|---|---|---|---|
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Package | 32-LQFP (7x7 mm) | 32-LQFP (7x7 mm) - same | 32-LQFP (7x7 mm) - same | 32-LQFP (7x7 mm) - same | 32-LQFP (7x7 mm) - same | 32-LQFP - same |
| Core | HC08 8-bit | HC08 8-bit | HC08 8-bit | HC08 8-bit | HC08 8-bit | HC08 8-bit |
| Program Memory (Flash) | 8 KB | 16 KB | 8 KB | 8 KB | 8 KB | 32 KB |
| RAM | 512 B | 512 B | 512 B | 512 B | 512 B | 1 KB |
| Maximum Clock | 8 MHz internal bus | 8 MHz internal bus | 8 MHz internal bus | 8 MHz internal bus | 8 MHz internal bus | 8 MHz internal bus |
| GPIO Count | 24 | 24 | 24 | 24 | 24 | 32 |
| Connectivity | LINbus, SCI, SPI | LINbus, SCI, SPI | LINbus, SCI, SPI | LINbus, SCI, SPI | LINbus, SCI, SPI | SCI, SPI |
| Lifecycle Status | Obsolete | Obsolete | Obsolete | Obsolete | Obsolete | Obsolete |
Key Differentiators
- Integrated LINbus connectivity in a 32-LQFP 8-bit MCU (vs MC908AP32ACFQE)
- Internal clock generator eliminates external crystal (vs Older HC908JL/JK families)
- Two 16-bit PWM timers with 2 channels each (vs MC908AP32ACFQE)
Design Notes
Decouple each MC908EY8AMFJE VDD pin with a 100 nF ceramic capacitor placed within 5 mm of the package pin, plus a bulk 4.7 uF tantalum or aluminum-polymer cap on the board supply rail. The dual VDD pins (pin 8 and pin 24) and dual VSS pins (pins 7 and 25) must each be connected - floating either pin can cause logic errors during transitions. Tie RST high through a 10 kohm pull-up with a 1 nF capacitor to ground for clean POR behavior.
Do not rely on the internal ICG for tight UART baud rates - the trim accuracy is typically +/-2% and drifts over temperature. For SCI baud rates above 9600 bps or for LIN bus timing, switch to an external ceramic resonator on OSC1/OSC2 (pins 31 and 32). Also note the monitor ROM is enabled by default on the EY8 - disable it for production firmware or unwanted entry into monitor mode can occur if PTA0 is held low at reset.
Estimated: At maximum 8 MHz bus activity across all peripherals, supply current is approximately 15 mA, so dissipation on a 5 V supply is around 75 mW. The 32-LQFP (7x7 mm) package has a theta_JA of approximately 65 C/W on a 2-layer board, giving a 5 C rise above ambient. No heatsink is required; however, keep the part away from high-power MOSFETs and consider thermal vias if used in a sealed enclosure.
Compliance Information
Compliance information not retrieved by the verified web data set; users should request the latest NXP material declaration before committing to production.