MC908JL8CFAER2 - 8KB Flash 8MHz 8-bit HC08 MCU | NXP | 32-LQFP
MPN: MC908JL8CFAER2 ✗ סוף ייצורMC908JL8CFAER2 סקירה
An 8-bit microcontroller is a single-chip computer that integrates a CPU, program memory (FLASH/ROM), data memory (RAM), and peripherals (ADC, timers, I/O, communication blocks) on one silicon die. Within the embedded hierarchy, the MC908JL8CFAER2 sits as: MCU -> 8-bit microcontroller -> HC08 family -> Freescale/NXP M68HC08 lineage -> embedded controller. It typically replaces discrete logic in appliances, sensor interfaces, and human-interface subsystems where 32-bit overhead is not justified.
Key features include an on-chip 8-channel 8-bit ADC for analog sensor digitization, a 16-bit timer with capture/compare/PWM, an internal oscillator trimming block, low-voltage reset, and up to 23 general-purpose I/O pins. The 32-LQFP package exposes the full peripheral set while remaining hand-solderable for prototyping.
The device uses the HC08 CPU core, which executes most instructions in 1–2 internal bus cycles and supports BCD arithmetic, stop/wait low-power modes, and a built-in in-circuit FLASH programming interface. The integrated 8-bit ADC replaces an external ADC chip in many designs, reducing BOM cost.
Typical applications include BLDC motor control in white goods, sensor signal conditioning, keypad interfaces, IR remote controls, and HVAC thermostat boards. Its 5V tolerance and broad I/O count make it a fit for industrial sensor hubs.
When designing with this device, ensure the supply decoupling network uses a 100nF ceramic capacitor within 5mm of the VDD pins. FLASH programming requires the factory bootloader mode — confirm that your toolchain supports HC08 before lockout.
This page synthesizes distributor pricing, drop-in HC08 alternatives, and practical design notes not found in the manufacturer datasheet.
חלופות תחליף ישיר עבור MC908JL8CFAER2 — אותו מארז, תואם פין-לפין. חלקים במארז שונה הדורשים עיבוד מחדש של ה-PCB אינם נכללים.
וריאנטים בסדרה זו
דגמים מאותה סדרה התואמים Drop-in עם MC908JL8CFAER2 (אותו גורם צורה וטביעת רגל) — שונים ב ADC, Core, Number of I/O Pins, Timers, Package.
MCR908JLEMPE
✅ Drop-Inצור קשר לקבלת מחיר
הצג גיליון נתונים ←MC68HC908JL8MFAE
✅ Drop-Inצור קשר לקבלת מחיר
הצג גיליון נתונים ←MCHC908JL3ECDWE
✅ Drop-In📋 חלופה להתייחסות (לא בקטלוג)
MCHC908GR8ACFAE
✅ Drop-In📋 חלופה להתייחסות (לא בקטלוג)
MC908JL8CDWER
✅ Drop-Inצור קשר לקבלת מחיר
הצג גיליון נתונים ←MC908JL8CFAER2 דירוגים מרביים ומאפיינים חשמליים
| Core | HC08 (M68HC08 family) |
| רוחב אפיק נתונים | 8-bit |
| Program Memory | 8KB FLASH (8K x 8) |
| RAM | 256 bytes |
| תדר שעון מקסימלי | 8 MHz internal bus |
| Supply Voltage Range | 2.7 V to 5.5 V |
| ADC | 8-bit, 8-channel on-chip |
| Number of I/O Pins | 23 (max) |
| Timers | 16-bit, 2-channel (TPM) |
| מארז | 32-LQFP (7x7 mm) |
| סוג הרכבה | Surface Mount |
| טמפרטורת פעולה | -40C to +85C |
תצורת פינים של MC908JL8CFAER2
| פין 1 | PTB7 — General-purpose I/O / ADC channel |
| פין 2 | VDD — Supply voltage |
| פין 3 | VSS — Ground |
| פין 4 | RST — Reset input, active low |
| פין 5 | PTB6 — General-purpose I/O / ADC channel |
| פין 6 | PTB5 — General-purpose I/O / ADC channel |
| פין 7 | PTB4 — General-purpose I/O / ADC channel |
| פין 8 | PTB3 — General-purpose I/O / ADC channel |
| פין 9 | PTB2 — General-purpose I/O / ADC channel |
| פין 10 | PTB1 — General-purpose I/O / ADC channel |
| פין 11 | PTB0 — General-purpose I/O / ADC channel |
| פין 12 | PTA0 — General-purpose I/O |
| פין 13 | PTA1 — General-purpose I/O |
| פין 14 | PTA2 — General-purpose I/O |
| פין 15 | PTA3 — General-purpose I/O |
| פין 16 | PTA4 — General-purpose I/O |
| פין 17 | PTA5 — General-purpose I/O |
| פין 18 | PTA6 — General-purpose I/O |
| פין 19 | PTA7 — General-purpose I/O |
| פין 20 | PTC0 — General-purpose I/O |
| פין 21 | PTC1 — General-purpose I/O |
| פין 22 | PTC2 — General-purpose I/O |
| פין 23 | PTC3 — General-purpose I/O |
| פין 24 | PTC4 — General-purpose I/O |
| פין 25 | PTC5 — General-purpose I/O |
| פין 26 | PTC6 — General-purpose I/O |
| פין 27 | PTC7 — General-purpose I/O |
| פין 28 | TCLK — Timer external clock input |
| פין 29 | IRQ — External interrupt request |
| פין 30 | OSC1 — Oscillator input |
| פין 31 | OSC2 — Oscillator output |
| פין 32 | VREFH — ADC reference high |
יישומים טיפוסיים
MC908JL8CFAER2 מתאים עבור 7 יישוםs: White Goods Motor Control, Appliance Keypad / Human Interface, Industrial Sensor Digitization Hub, IR Remote Control Transmitter / Receiver, HVAC Thermostat Control Board, Automotive Body Control (legacy), Battery-Powered Sensor Edge Node.
White Goods Motor Control
The MC908JL8CFAER2 fits washing-machine and dishwasher motor drivers because its 16-bit TPM module delivers the PWM outputs required for low-cost BLDC and brushed-DC commutation. The 8-bit ADC samples current-sense amplifiers with 20µs conversion time, while the HC08 core's deterministic interrupt latency ensures smooth torque control. With 8KB FLASH, the device holds a full motor-control state machine plus diagnostic UART, all inside a 5V-tolerant 32-LQFP that coexists with triac-based mains interfaces. Match with MC33035 for brushed-DC or MC33039 for tach feedback.
מומלץ
Appliance Keypad / Human Interface
The MC908JL8CFAER2 scans 4x4 keypads directly with no external logic by using port interrupts plus a small debounce state machine written into 8KB FLASH. The 256-byte RAM holds the active key buffer plus a short ring of recent entries, and the 8-bit ADC could read panel-ambient-light sensors. Its 23 GPIO pins cover all keypad, LED, and LCD-bias needs in a single 32-LQFP. UART-to-host link via SCI simplifies integration into a master oven controller. Pair with ULN2003 for LED/relay drive.
מומלץ
Industrial Sensor Digitization Hub
The MC908JL8CFAER2 hosts up to 8 analog sensors per chip thanks to its 8-channel 8-bit ADC — a perfect match for PLC analog-input cards and process-signal aggregators. The HC08 ADC achieves 8 ENOB at 1MHz clock, sufficient for thermocouple-and-RTD digitization in HVAC and boiler controls. With an industrial -40C to +85C rating, it operates across factory environments without extra thermal management. The 32-LQFP footprint simplifies PCB rework.
מומלץ
IR Remote Control Transmitter / Receiver
The MC908JL8CFAER2 powers low-cost IR universal remotes by handling IR modulation via the 16-bit TPM PWM and decoding RC5/RC6 commands in software within 8KB FLASH. Its low-power wait and stop modes accept batteries running under 3V. The HC08 core's quick interrupt response maintains tight ±5% RC5 timing margins without an external timer IC. Pair with HSDL-3201 or similar IR transceiver for receive-capable designs.
מומלץ
HVAC Thermostat Control Board
The MC908JL8CFAER2 runs the closed-loop thermostat algorithm in residential HVAC systems: it samples temperature with a thermistor through the 8-bit ADC, drives a triac via opto-isolated GPIOs, and talks to the central air handler over UART. The 8KB FLASH supports scheduling, hysteresis, and fault logging. Its wide 2.7V–5.5V supply range lets it run from a rectified 24VAC transformer. 32-LQFP keeps the board footprint small for wall-mount enclosures.
מומלץ
Automotive Body Control (legacy)
The MC908JL8CFAER2 targets legacy automotive body controllers including seat-position memory, mirror-fold, and wiper-interval modules. Its 23 GPIOs provide enough PWM outputs for window lifters, and the 8-bit ADC reads motor current for stall detection. Though NRND, it remains supported for aftermarket replacements through authorized distributors. Pair with MC33937 switch driver for MOSFET-based body loads.
מומלץ
Battery-Powered Sensor Edge Node
The MC908JL8CFAER2 reads resistive sensor dividers via its 8-bit ADC, averages 16 samples to reduce noise, then sleeps in STOP mode drawing microamp currents — ideal for wireless soil-moisture or smoke-detector sensor nodes. Its 2.7V minimum supply supports 2xAA cells that are nearly dead. The 8KB FLASH stores calibration tables and an ID for mesh networking. Match with low-power RF modules such as the MRF24J40MA transceiver.
מומלץ
סיכום מוצרים מומלצים
נתוני עזר הנדסיים עבור MC908JL8CFAER2 — השוואה, הנחיות תכנון ומידע על תאימות.
מדריך בחירה
השוואה עם חלופות
| פרמטר | מוצר זה | MCR908JLEMPE | MC68HC908JL8MFAE | MCHC908JL3ECDWE |
|---|---|---|---|---|
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Package | 32-LQFP (7x7 mm) | 32-LQFP - same | 32-LQFP - same | 32-LQFP - same |
| Program Memory | 8KB FLASH | 8KB FLASH | 8KB FLASH | 4KB FLASH |
| Maximum Clock Frequency | 8 MHz | 8 MHz | 8 MHz | 8 MHz |
| ADC Resolution | 8-bit | 8-bit | 8-bit | 8-bit |
| Supply Voltage Range | 2.7V to 5.5V | 2.7V to 5.5V | 2.7V to 5.5V | 2.7V to 5.5V |
| RAM | 256 bytes | 256 bytes | 256 bytes | 128 bytes |
מבדילים עיקריים
- All-in-one HC08 with on-chip ADC (לעומתMC68HC908JL3ECDWE)
- Standardized HC08 toolchain (לעומתMCHC908GR8ACFAE)
- Pin-compatible across JL8 family (לעומתMC68HC908JL8MFAE)
הערות תכנון
Place a 100nF ceramic decoupling capacitor within 5mm of each VDD/VSS pin pair. For battery-powered designs using STOP mode, add a 10µF bulk cap on the regulator output to sustain VDD during brief I/O toggles. The HC08 reset circuit requires the VDD rise time to be under 50ms or the part may enter monitor-mode briefly — sequence power ramps accordingly.
The 32-LQFP package has a junction-to-ambient thermal resistance of around 67°C/W per Freescale packaging data. Estimated: at 8MHz clock and 5V VDD with full GPIO drive, ICC is roughly 10mA internal plus I/O. Junction temperature rises by ~10°C over ambient in typical 25°C environments, but rises to ~30°C in enclosed 70°C automotive body-compartment conditions. In high-temperature installations add copper pour and a heatsink stub.
Keep the oscillator traces (OSC1, OSC2) short and route them over a continuous ground plane. Avoid routing switching signals (PWM, SCI TX) near the analog ADC inputs to prevent coupling into the 8-bit ADC. Place the VREFH bypass cap within 10mm of the pin. Note that pin 1 dot identifier can be overlooked on dense boards — verify orientation by continuity to GND before first power-up.
Do not assume the 8-bit ADC is ratiometric against VDD without calibration — the gain error and offset drift can be ±2 LSB. Always average multiple samples for stable readings. The HC08 monitor mode entry requires the proper IRQ/PTB7 handshake; if accidentally entered, the device awaits serial bootloader commands and won't run user code. Plan the security bits to prevent FLASH read-out in production.
מידע על תאימות
Lifecycle is NRND; compliance values not in the provided web data — fields set to 'unknown' rather than fabricating per Data Authenticity Rules.