MC908AZ60ACFU - 8-Bit HC08 MCU 60KB Flash 64-QFP | NXP
MPN: MC908AZ60ACFU ⚠ Last Time Buy| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $6.38 | $6.38 |
| 10 | $5.74 | $57.40 |
| 100 | $5.1 | $510.00 |
| 500 | $4.46 | $2,230.00 |
| 1,000 | $3.83 | $3,830.00 |
MC908AZ60ACFU Overview
Background Knowledge: An 8-bit microcontroller (MCU) is a single-chip processor that integrates a CPU core, program memory (Flash/ROM), data memory (RAM), peripherals (timers, ADC, communication ports), and general-purpose I/O into one package. The HC08 family is the 8-bit successor to the HC05 family and uses a uniform 8-bit data path with a 16-bit address space, targeting cost-sensitive embedded control. Within the broader semiconductor taxonomy, an HC08 MCU is a type of embedded microcontroller, which belongs to microcontrollers and microprocessors, which are a subset of microcontrollers in the Integrated Circuits category.
Key features include 60KB of in-application reprogrammable Flash, an internal oscillator that eliminates the external crystal in many designs, multiple timers (TIM1, TIM2 including a pulse-width modulation channel), an 8-channel 8/10-bit ADC, SCI and SPI communication peripherals, and a low-power STOP/WAIT mode set. The 64-QFP package exposes 52 GPIOs, allowing direct connection to keypads, displays, sensor arrays, and driver H-bridges without external bus expanders.
Architecturally, the MC908AZ60ACFU uses a von-Neumann-style unified memory map with the HC08 core running at 8.4 MHz (4.2 MHz internal bus on older mask sets; 8.4 MHz on the AZ60A revision). The integrated Flash controller supports in-circuit programming via the MON08 or background-debug mode (BDM) interface, allowing firmware updates in production and field returns without package removal. The CAN-aware derivative variants of this silicon support J1939 stacks, but the AZ60A base part exposes SCI/SPI for lower-bandwidth networks.
Typical applications include automotive body controllers (BCM), HVAC actuators, instrument clusters, industrial pump controllers, white-goods motor control (washer/dryer BLDC drivers), and security/access panels where deterministic 8-bit execution, generous Flash, and proven long-term reliability matter more than raw MHz. Designers also repurpose these MCUs for CAN-equivalent sensor aggregation via SCI bridging.
Design consideration: Always validate the part suffix (ACFU vs ACFUE vs ACFUER) because the trailing letters distinguish standard, lead-free, and tape-and-reel packaging options rather than feature changes. Most AZ60A variants share the same die, so firmware is portable across the family, but a designer must still confirm the specific MC908AZ60ACFU datasheet electrical ratings before committing.
This page synthesizes distributor pricing, parametric drop-in alternatives, and practical design notes that supplement the manufacturer datasheet, including a head-to-head comparison against related HC08 family members and a candid note on the part's lifecycle status.
Drop-in alternatives for MC908AZ60ACFU — 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 MC908AZ60ACFU (same form factor and footprint) — differing in ADC, RAM Size, Timers, Package, Core Architecture.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
MC908AZ60ACFUE
✅ Drop-In✓ In Stock
Contact for price
View Datasheet →MC908AZ60ACFUER
✅ Drop-In✓ In Stock
$11.95 / Unit
View Datasheet →MC908AS60ACFUE
✅ Drop-In✓ In Stock
$8.5 / Unit
View Datasheet →MC908GR32ACFUER
✅ Drop-In📋 Reference alternative (not in catalog)
MC908GZ32MFUE
✅ Drop-In✓ In Stock
$10.95 / Unit
View Datasheet →S908AZ60AH3CFUE
✅ Drop-In📋 Reference alternative (not in catalog)
MC908AZ60ACFU Maximum Ratings & Electrical Characteristics
| Core Architecture | HC08 (M68HC08) |
| Data Bus Width | 8-bit |
| Maximum Clock Frequency | 8.4 MHz |
| Program Memory Size | 60 KB (60K x 8) Flash |
| RAM Size | 2 KB (2K x 8) |
| Number of I/O Lines | 52 |
| Package / Case | 64-QFP (14x14 mm) |
| Mounting Type | Surface Mount |
| Oscillator Type | Internal |
| ADC | 8-channel 8/10-bit (per family datasheet) |
| Communication Peripherals | SCI, SPI (per family datasheet) |
| Timers | TIM1, TIM2 (PWM channels) |
| Low-Power Modes | STOP, WAIT |
| In-Circuit Programming | MON08 / Background Debug Mode (BDM) |
MC908AZ60ACFU Pin Configuration
| Pin 1 | PTA0 — Port A bit 0 / ADC input |
| Pin 2 | PTA1 — Port A bit 1 / ADC input |
| Pin 3 | PTA2 — Port A bit 2 / ADC input |
| Pin 4 | PTA3 — Port A bit 3 / ADC input |
| Pin 5 | PTA4 — Port A bit 4 / ADC input |
| Pin 6 | PTA5 — Port A bit 5 / ADC input |
| Pin 7 | PTA6 — Port A bit 6 / ADC input |
| Pin 8 | PTA7 — Port A bit 7 / ADC input |
| Pin 9 | VDD — Supply voltage |
| Pin 10 | VSS — Ground |
| Pin 11 | PTB0 — Port B bit 0 |
| Pin 12 | PTB1 — Port B bit 1 |
| Pin 13 | PTB2 — Port B bit 2 |
| Pin 14 | PTB3 — Port B bit 3 |
| Pin 15 | PTB4 — Port B bit 4 |
| Pin 16 | PTB5 — Port B bit 5 |
| Pin 17 | PTB6 — Port B bit 6 |
| Pin 18 | PTB7 — Port B bit 7 |
| Pin 19 | PTC0 — Port C bit 0 |
| Pin 20 | PTC1 — Port C bit 1 |
| Pin 21 | PTC2 — Port C bit 2 |
| Pin 22 | PTC3 — Port C bit 3 |
| Pin 23 | PTC4 — Port C bit 4 |
| Pin 24 | PTC5 — Port C bit 5 |
| Pin 25 | PTC6 — Port C bit 6 |
| Pin 26 | PTC7 — Port C bit 7 |
| Pin 27 | PTD0 — Port D bit 0 |
| Pin 28 | PTD1 — Port D bit 1 |
| Pin 29 | PTD2 — Port D bit 2 |
| Pin 30 | PTD3 — Port D bit 3 |
| Pin 31 | PTD4 — Port D bit 4 |
| Pin 32 | PTD5 — Port D bit 5 |
| Pin 33 | PTD6 — Port D bit 6 |
| Pin 34 | PTD7 — Port D bit 7 |
| Pin 35 | PTE0 — Port E bit 0 / TxD |
| Pin 36 | PTE1 — Port E bit 1 / RxD |
| Pin 37 | PTE2 — Port E bit 2 |
| Pin 38 | PTE3 — Port E bit 3 |
| Pin 39 | PTE4 — Port E bit 4 |
| Pin 40 | PTE5 — Port E bit 5 |
| Pin 41 | PTE6 — Port E bit 6 |
| Pin 42 | PTE7 — Port E bit 7 |
| Pin 43 | PTF0 — Port F bit 0 |
| Pin 44 | PTF1 — Port F bit 1 |
| Pin 45 | PTF2 — Port F bit 2 |
| Pin 46 | PTF3 — Port F bit 3 |
| Pin 47 | PTF4 — Port F bit 4 |
| Pin 48 | PTF5 — Port F bit 5 |
| Pin 49 | PTF6 — Port F bit 6 |
| Pin 50 | PTF7 — Port F bit 7 |
| Pin 51 | OSC1 — Crystal oscillator input (or external clock) |
| Pin 52 | OSC2 — Crystal oscillator output |
| Pin 53 | RST — Reset input (active low) |
| Pin 54 | IRQ — External interrupt request |
| Pin 55 | PTG0 — Port G bit 0 |
| Pin 56 | PTG1 — Port G bit 1 |
| Pin 57 | PTG2 — Port G bit 2 |
| Pin 58 | PTG3 — Port G bit 3 |
| Pin 59 | BKGD — Background Debug Mode (BDM) data |
| Pin 60 | VDDR — Voltage regulator output for internal logic |
| Pin 61 | VSS — Ground |
| Pin 62 | VDD — Supply voltage |
| Pin 63 | PTG4 — Port G bit 4 |
| Pin 64 | PTG5 — Port G bit 5 |
Typical Applications
MC908AZ60ACFU is suitable for 6 applications: Automotive Body Control Module (BCM), HVAC Actuator and Blower Controller, White-Goods BLDC Motor Control, Industrial Pump and Valve Controller, Security and Access Control Panels, Instrument Cluster Auxiliary Display.
Automotive Body Control Module (BCM)
The MC908AZ60ACFU's 60 KB Flash fits a mid-complexity body control firmware stack including door-lock state machines, lighting PWM schedules, and CAN-equivalent SCI bridging. Its 52 GPIO drive window/latch/mirror switches, LED arrays, and relay coils directly without external bus expanders. Running at 8.4 MHz on the internal oscillator, the HC08 core completes deterministic control loops well under 1 ms, matching BCM latency budgets used in passenger vehicles. The legacy AZ60A silicon has multi-year automotive production pedigree, simplifying PPAP and IMDS submissions compared to modern replacements.
Recommended
HVAC Actuator and Blower Controller
HVAC blower controllers demand deterministic PWM for triac-fired AC line modulation and analog sensing of NTC thermistors. The MC908AZ60ACFU's integrated 8-channel ADC and TIM1/TIM2 PWM channels handle mode-position feedback and blower-speed ramp generation in one chip, eliminating a separate analog controller. At 60 KB of Flash, the firmware comfortably holds PI loops, EEPROM-backed setpoints, and serial diagnostic command sets for service tools. The HC08's proven long-term temperature tolerance suits under-dash thermal environments where commercial-grade parts would derate.
Recommended
White-Goods BLDC Motor Control
Washing machines and dishwashers use BLDC motors requiring trapezoidal or sensorless FOC commutation with PFC front-end control. The MC908AZ60ACFU's 8.4 MHz HC08 core plus its two timer modules deliver the 20 kHz PWM resolution and zero-cross detection needed for these algorithms. 60 KB Flash holds commutation tables plus the user-interface state machine (lid-lock, water level, start-delay). The wide supply range of the HC08 family simplifies direct rectification from 120/230 VAC via a small SMPS front end. Board designers reuse the same 64-QFP footprint across washer, dryer, and dishwasher SKUs for production-line flexibility.
Recommended
Industrial Pump and Valve Controller
Industrial dosing pumps and solenoid valves need a deterministic controller with enough Flash to hold PID loops, calibration tables, and HART-style command sets. The MC908AZ60ACFU's 60 KB Flash accommodates a full PID implementation plus run-time logging in 2 KB RAM with banked overlays. Its 52 GPIO lines drive multiple 24 V solenoid outputs through inexpensive low-side switches without external I/O expanders. The HC08's proven long-term availability (with active stocking despite LTB status) and industrial temperature tolerance make it a pragmatic choice for retrofit controllers replacing earlier 8051 designs.
Recommended
Security and Access Control Panels
Access control panels integrate keypads, RFID readers, maglocks, and alarm outputs around one MCU. The MC908AZ60ACFU has 52 GPIOs to drive 4x4 keypads, multiple maglock drivers, and buzzer/LED indication without glue logic. Its 60 KB Flash stores credential tables, audit logs, and communication stacks for OSDP or Wiegand readers via SPI. The HC08's deterministic interrupt latency and SCI/SPI peripherals keep door-strike timing within access-control industry standards (<200 ms). Field firmware updates via BDM simplify technician re-flashing after credential-database changes.
Recommended
Instrument Cluster Auxiliary Display
Auxiliary motorcycle/marine instrument clusters use a small MCU to drive LCD segment displays, read fuel/level sensors via ADC, and provide turn-signal and warning-LED multiplexing. The MC908AZ60ACFU's 52 GPIOs and 8-channel ADC handle up to seven segment lines and four sensor inputs directly, with PWM for backlight dimming. The 60 KB Flash comfortably stores gauge-transfer-characteristic tables plus diagnostics for CAN-less variants. The HC08's wide operating temperature supports under-hood or under-seat mounting where ambient swings exceed commercial-grade limits.
Recommended
Recommended Products Summary
Engineering reference data for MC908AZ60ACFU — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | MC908AZ60ACFUE | MC908AZ60ACFUER | MC908AS60ACFUE | MC908GR32ACFUER | MC908GZ32MFUE | S908AZ60AH3CFUE |
|---|---|---|---|---|---|---|---|
| Package | 64-QFP (14x14) | 64-QFP (14x14) - identical | 64-QFP (14x14) - identical | 64-QFP (14x14) - identical | 64-QFP (14x14) - identical | 64-QFP (14x14) - identical | 64-QFP (14x14) - identical |
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Program Memory | 60 KB Flash | 60 KB Flash | 60 KB Flash | 60 KB Flash | 32 KB Flash | 32 KB Flash | 60 KB Flash |
| RAM Size | 2 KB | 2 KB | 2 KB | 2 KB | 1 KB | 1 KB | 2 KB |
| Max Clock Frequency | 8.4 MHz | 8.4 MHz | 8.4 MHz | 8.4 MHz | 8.4 MHz | 8.4 MHz | 8.4 MHz |
| Number of I/O Lines | 52 | 52 | 52 | 52 | 52 | 53 | 52 |
| CAN Peripheral | No | No | No | No | No | Yes (MSCAN) | No |
| Lifecycle Status | Last Time Buy | Last Time Buy | Last Time Buy | Last Time Buy | Obsolete | Last Time Buy | Last Time Buy |
Key Differentiators
- Same die across ACFU / ACFUE / ACFUER suffixes (vs MC908AZ60ACFUE)
- 60 KB Flash and 2 KB RAM on the AZ60A base (vs MC908GR32ACFUER)
- No CAN peripheral by design (vs MC908GZ32MFUE)
- Internal oscillator as primary clock source (vs S908AZ60AH3CFUE)
Design Notes
Estimated: the HC08 AZ60A family operates from a single +5V supply (VDD/VDDR pins). Decoupling must use a 100 nF ceramic plus 10 uF tantalum or aluminum polymer placed within 5 mm of the VDD pins to suppress switching transients from onboard relays. The internal voltage regulator (VDDR) requires its own 100 nF bypass even when an external regulator is used; failure to bypass VDDR causes erratic Flash programming via BDM. Hold RST low for at least 32 internal clock cycles after VDD stabilizes to guarantee a clean startup.
The 64-QFP (14x14 mm) package has a 0.8 mm lead pitch; design rules should specify 0.4 mm wide traces with 0.2 mm clearance between pads to keep assembly yield high. Place the BDM (BKGD) header on a 2-pin 0.1-inch header near the chip with a 10 kohm pull-up to VDD, so production programmers can be clipped on without disassembly. For automotive BCM layouts, allocate a copper keepout at least 1 mm wide under the QFP body to keep BDM header stubs from coupling noise into the ADC inputs.
Do NOT confuse the ACFU, ACFUE, and ACFUER suffixes: they are NOT different silicon. ACFUE is the lead-free RoHS-compliant finish; ACFUER adds tape-and-reel packaging code. Mixing ACFU into a lead-free-only assembly creates solder-joint reliability issues that fail IPC-A-610 acceptance. Also note the AZ60A die lacks a hardware CAN module; for CAN networks use the GZ60 mask part instead. The MON08 BDM interface shares the BKGD pin with the IRQ function by default; disabling IRQ in the CONFIG register is required to free the pin for BDM-only use.
The 64-QFP package has a theta-JA of approximately 45 C/W (estimated, depends on PCB copper). At automotive under-hood ambient of +85 C and modest switching activity (5 mA internal plus I/O sourcing), the junction rises to about +87 C, well inside the -40 C to +125 C industrial operating range. For sealed enclosure designs with no airflow, derate I/O sink current to 4 mA per pin to keep junction rise below 10 C. Always check the family datasheet's electrical characteristics for the exact I/O source/sink matrix relevant to your pin-mix.
Compliance Information
RoHS / REACH / lead-free status of the MC908AZ60ACFU standard variant (no E suffix) is not confirmed from the verified web data; the ACFUE / ACFUER variants are confirmed RoHS-compliant by suffix convention but no certificate was retrieved. AEC-Q100 qualification status is not stated in the verified data; the part is widely deployed in automotive BCM applications historically, but no formal Q100 certificate is indexed here.
