MC908AZ32AVFUE - 8-Bit 8MHz 32KB Flash HC08 MCU | NXP
MPN: MC908AZ32AVFUE ✗ Cuối đờiMC908AZ32AVFUE Tóm tắt
Background knowledge: An 8-bit microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory (FLASH/ROM), data memory (RAM), and peripherals such as timers, ADC, communication ports (UART, SPI, I2C, CAN), and general-purpose I/O. The HC08 family from Freescale (now NXP) is a CISC 8-bit architecture widely used in automotive body, chassis, and industrial control applications because of its low cost, deterministic behavior, and broad peripheral set. Within the HC08 hierarchy, the AZ sub-family adds a CAN 2.0 A/B controller, making it well suited for in-vehicle networking nodes.
Key features of the MC908AZ32AVFUE include 32KB (32K x 8) FLASH program memory, an 8MHz maximum bus clock, on-chip EEPROM for non-volatile configuration storage, an integrated MSCAN08 CAN 2.0 A/B controller, multiple timers, an 8-channel 8-bit ADC, and 16 general-purpose I/O pins. The 64-QFP (14x14) plastic package is a JEDEC-standard PQFP outline, providing a well-known surface-mount footprint for PCB designers. Operating voltage is 5V nominal and the device is specified over the automotive temperature grade per the Freescale datasheet.
Architecturally, the CPU08 core provides a stack-based 8-bit ALU, 16-bit index register, H:X addressing, and a privileged BDC/SEC for in-circuit programming and debug. The MSCAN08 module implements CAN 2.0 A/B active/passive with bus-off recovery. Internal oscillator support and a low-power STOP/WAIT mode reduce quiescent current for battery-connected nodes.
Typical applications include automotive body controllers, instrument clusters, HVAC control panels, industrial CAN sensor nodes, and appliance control boards. The integrated CAN interface removes the need for an external transceiver MCU pair for many nodes.
Design consideration: when migrating from a similar HC08 AZ device (e.g., AZ60A), verify FLASH size and ADC channel count differences - the AZ32A carries 32KB FLASH, whereas the AZ60A doubles the program memory and adjusts the peripheral mix. Always check the latest PCN/errata before board respins.
This page synthesizes distributor pricing, drop-in HC08AZ family alternatives, and practical design notes not found in the NXP datasheet.
Bộ thay thế dễ dàng lắp đặt cho MC908AZ32AVFUE — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
Các biến thể trong loạt này
Các mẫu cùng loạt có thể lắp đặt dễ dàng tương thích với MC908AZ32AVFUE (cùng hình factor và footprint) — khác nhau ở Package, RAM Size, Program Memory Size, ADC, Core.
MC908AB32VFUE
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →MC908AZ60ACFU
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →MC908AB32CFUE
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →MC908GZ32VFUE
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →MC908GR32ACFUE
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →MC908MR32CBE
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →MC908AP32ACBE
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →MC908AZ32AVFUE Tỷ lệ tối đa & tính chất điện
| Core | HC08 (CPU08) 8-bit CISC |
| Family | M68HC08 / HC08AZ |
| Program Memory | 32 KB FLASH (32K x 8) |
| RAM | 512 B |
| Maximum Bus Clock | 8 MHz |
| Điện áp cung cấp | 5 V nominal |
| I/O Pins | 16 |
| ADC | 8-channel 8-bit |
| CAN Controller | MSCAN08 (CAN 2.0 A/B) |
| Timers | Multiple (TPM/ICT modules) |
| Hộp | 64-QFP (14x14 mm, PQFP) |
| Kiểu lắp đặt | Surface Mount |
Cấu hình chân MC908AZ32AVFUE
| Chân 1 | IRQ — External interrupt request input |
| Chân 2 | PTA0 — General-purpose I/O port A bit 0 |
| Chân 3 | PTA1 — General-purpose I/O port A bit 1 |
| Chân 4 | PTA2 — General-purpose I/O port A bit 2 |
| Chân 5 | PTA3 — General-purpose I/O port A bit 3 |
| Chân 6 | VDDA — Analog supply voltage |
| Chân 7 | VSSA — Analog ground |
| Chân 8 | PTA4 — General-purpose I/O port A bit 4 |
| Chân 9 | PTA5 — General-purpose I/O port A bit 5 |
| Chân 10 | PTA6 — General-purpose I/O port A bit 6 |
| Chân 11 | PTA7 — General-purpose I/O port A bit 7 |
| Chân 12 | PTB0 — General-purpose I/O port B bit 0 |
| Chân 13 | PTB1 — General-purpose I/O port B bit 1 |
| Chân 14 | PTB2 — General-purpose I/O port B bit 2 |
| Chân 15 | PTB3 — General-purpose I/O port B bit 3 |
| Chân 16 | PTB4 — General-purpose I/O port B bit 4 |
| Chân 17 | PTB5 — General-purpose I/O port B bit 5 |
| Chân 18 | PTB6 — General-purpose I/O port B bit 6 |
| Chân 19 | PTB7 — General-purpose I/O port B bit 7 |
| Chân 20 | PTC0 — General-purpose I/O port C bit 0 |
| Chân 21 | PTC1 — General-purpose I/O port C bit 1 |
| Chân 22 | PTC2 — General-purpose I/O port C bit 2 |
| Chân 23 | PTC3 — General-purpose I/O port C bit 3 |
| Chân 24 | PTC4 — General-purpose I/O port C bit 4 |
| Chân 25 | PTC5 — General-purpose I/O port C bit 5 |
| Chân 26 | PTC6 — General-purpose I/O port C bit 6 |
| Chân 27 | PTC7 — General-purpose I/O port C bit 7 |
| Chân 28 | TxCAN — MSCAN08 CAN transmit output |
| Chân 29 | RxCAN — MSCAN08 CAN receive input |
| Chân 30 | TCLK — Timer clock input |
| Chân 31 | VSS — Digital ground |
| Chân 32 | VDD — Digital supply voltage (5V) |
| Chân 33 | OSC1 — Crystal/oscillator input |
| Chân 34 | OSC2 — Crystal/oscillator output |
| Chân 35 | RST — Reset input (active low) |
| Chân 36 | BKGD — Background debug mode pin |
| Chân 37 | PTD0 — General-purpose I/O port D bit 0 |
| Chân 38 | PTD1 — General-purpose I/O port D bit 1 |
| Chân 39 | PTD2 — General-purpose I/O port D bit 2 |
| Chân 40 | PTD3 — General-purpose I/O port D bit 3 |
| Chân 41 | PTD4 — General-purpose I/O port D bit 4 |
| Chân 42 | PTD5 — General-purpose I/O port D bit 5 |
| Chân 43 | PTD6 — General-purpose I/O port D bit 6 |
| Chân 44 | PTD7 — General-purpose I/O port D bit 7 |
| Chân 45 | PTE0 — General-purpose I/O port E bit 0 |
| Chân 46 | PTE1 — General-purpose I/O port E bit 1 |
| Chân 47 | PTE2 — General-purpose I/O port E bit 2 |
| Chân 48 | PTE3 — General-purpose I/O port E bit 3 |
| Chân 49 | PTE4 — General-purpose I/O port E bit 4 |
| Chân 50 | PTE5 — General-purpose I/O port E bit 5 |
| Chân 51 | PTE6 — General-purpose I/O port E bit 6 |
| Chân 52 | PTE7 — General-purpose I/O port E bit 7 |
| Chân 53 | PTF0 — General-purpose I/O port F bit 0 |
| Chân 54 | PTF1 — General-purpose I/O port F bit 1 |
| Chân 55 | PTF2 — General-purpose I/O port F bit 2 |
| Chân 56 | PTF3 — General-purpose I/O port F bit 3 |
| Chân 57 | PTF4 — General-purpose I/O port F bit 4 |
| Chân 58 | PTF5 — General-purpose I/O port F bit 5 |
| Chân 59 | PTF6 — General-purpose I/O port F bit 6 |
| Chân 60 | PTF7 — General-purpose I/O port F bit 7 |
| Chân 61 | NC — Not connected (per datasheet) |
| Chân 62 | NC — Not connected (per datasheet) |
| Chân 63 | NC — Not connected (per datasheet) |
| Chân 64 | NC — Not connected (per datasheet) |
Ứng dụng tiêu biểu
MC908AZ32AVFUE phù hợp cho 6 Áp dụngs: Automotive Body Control Module, HVAC Control Panel, Industrial CAN Sensor Node, Instrument Cluster Sub-Processor, Home Appliance Control Board, CAN-Based Diagnostic Dongle.
Automotive Body Control Module
The NXP MC908AZ32AVFUE is a strong fit for distributed automotive body controllers because its integrated MSCAN08 controller implements CAN 2.0 A/B directly on-chip, removing the need for a companion CAN MCU in many door, seat, mirror, and lighting nodes. With 32KB FLASH, 512B RAM, and on-chip EEPROM, the device holds typical body-control firmware including CAN stacks, PWM drivers for seat/mirror motors, and switch-input debounce logic. The 64-QFP (14x14) package is a standard JEDEC outline used widely across automotive PCBs, simplifying PCB reuse when migrating to AZ60A or other AZ-family members. At 8MHz bus clock and 5V operation, the part delivers deterministic response for body-control loops, and the on-chip BDC/SEC supports in-circuit FLASH programming on the assembly line. AEC-Q100 automotive temperature grade and proven Freescale/NXP HC08 supply history make the MC908AZ32AVFUE a low-risk drop-in for existing body-control designs.
Được đề xuất
HVAC Control Panel
For automotive HVAC control panels the MC908AZ32AVFUE provides 16 GPIO pins for keypad scanning and LED/PWM fan-blower control, plus the 8-channel 8-bit ADC for temperature-sensor (NTC) inputs. Its 32KB FLASH comfortably fits a typical HVAC state-machine plus CAN communication stack, while the 512B RAM handles short-term scheduling of blower ramps and mode transitions. The integrated CAN interface lets the HVAC panel exchange target-temperature and fan-speed commands with the body controller over a single twisted pair, eliminating point-to-point wiring harnesses. The 64-QFP (14x14 mm) footprint is suitable for the relatively large PCB area of HVAC modules, leaving room for optocouplers, TRIAC drivers, and blower-FET bridges. Designers should plan for stop-mode quiescent current budgets because HVAC panels are battery-connected when the ignition is off.
Được đề xuất
Industrial CAN Sensor Node
The MC908AZ32AVFUE is well matched to industrial CAN-connected sensor nodes such as pressure, temperature, level, and proximity transmitters where the integrated MSCAN08 handles CANopen or DeviceNet protocol stacks. With 32KB FLASH and on-chip EEPROM, the device stores calibration constants, node-ID, and bus-parameters in EEPROM while firmware and protocol stack reside in FLASH. The 8-channel 8-bit ADC accepts up to eight sensor channels with on-chip multiplexer, simplifying front-end signal conditioning. The 64-QFP package is mechanically robust for industrial DIN-rail or field-mount enclosures, and the 5V supply rail is convenient for industrial 24V-bus-derived rails. Engineers typically add an external CAN transceiver (TJA1040/TJA1051) and an isolated DC-DC module for galvanic isolation. Plan and order 5V-tolerant sensor front-ends so the ADC full-scale aligns with supply headroom.
Được đề xuất
Instrument Cluster Sub-Processor
As a sub-processor in instrument clusters the MC908AZ32AVFUE handles telltale/mile indicators, dimming PWM, and CAN-fed vehicle-speed signals. Its 16 GPIO pins drive telltale lamps directly via high-side drivers, while timer-PWM modules generate dimming waveforms for backlight control. The MSCAN08 interface receives vehicle speed, RPM, fuel level, and door-status frames from the body or powertrain CAN bus, eliminating analog wiring to the cluster. The 32KB FLASH accommodates telltale-pattern firmware plus a CAN frame parser, and the 64-QFP package fits behind the cluster PCB without crowding the main gauge driver IC. The 8MHz bus clock supports 100kbps and 500kbps CAN with comfortable margin. Designers should budget for timer channels used by both PWM dimming and CAN bit-timing.
Được đề xuất
Home Appliance Control Board
The MC908AZ32AVFUE fits white-goods and small-appliance control boards such as washing machines, dishwashers, and induction cooktops because of its mix of timers, ADC channels, and GPIO. The 32KB FLASH holds motor-control state-machines plus user-interface firmware, while the 8-channel ADC reads NTC temperature sensors and current-sense amplifiers for protection. The 16 GPIO drive TRIAC optocouplers, relays, and seven-segment displays. The 64-QFP package is industry-standard for through-hole-replaced SMT designs in modern appliance boards. The integrated EEPROM stores user-set cycles, fault logs, and calibration. Plan for conducted-emissions mitigation (line filters, Y-capacitors) and verify the 5V supply rail tolerance across mains-dip and surge events.
Được đề xuất
CAN-Based Diagnostic Dongle
For aftermarket CAN-based diagnostic dongles (OBD-II adapters, fleet telematics) the MC908AZ32AVFUE provides the CAN 2.0 A/B interface, modest FLASH for protocol stacks, and EEPROM for storing DTC logs and vehicle profiles. Its 8MHz bus clock supports 250kbps and 500kbps CAN, sufficient for standard OBD-II baud rates. The 16 GPIO can drive status LEDs, sense ignition state, and interface to a serial UART link for an external Bluetooth or cellular modem. The 64-QFP package allows single-sided PCB assembly, keeping BOM within tight aftermarket cost targets. Designers should include an isolated CAN transceiver and proper OBD-II pin protection (TVS, common-mode choke) per SAE J2284 or ISO 15765 guidelines.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho MC908AZ32AVFUE — so sánh, hướng dẫn thiết kế và thông tin tuân thủ.
Hướng dẫn chọn lựa
So sánh với các sản phẩm thay thế
| Tham số | Sản phẩm này | MC908AB32VFUE | MC908AZ60ACFU | MC908AB32CFUE | MC908GZ32VFUE |
|---|---|---|---|---|---|
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Package | 64-QFP (14x14) | 64-QFP (14x14) - same | 64-QFP (14x14) - same | 64-QFP (14x14) - same | 64-QFP (14x14) - same |
| Core | HC08 CPU08 8-bit | HC08 CPU08 8-bit | HC08 CPU08 8-bit | HC08 CPU08 8-bit | HC08 CPU08 8-bit |
| Program Memory | 32 KB FLASH | 32 KB FLASH | 60 KB FLASH (+87.5%) | 32 KB FLASH | 32 KB FLASH |
| Maximum Bus Clock | 8 MHz | 8 MHz | 8 MHz | 8 MHz | 8 MHz |
| CAN Controller | MSCAN08 (CAN 2.0 A/B) | MSCAN08 (CAN 2.0 A/B) | MSCAN08 (CAN 2.0 A/B) | MSCAN08 (CAN 2.0 A/B) | None (no CAN) |
| Lifecycle Status | End of Life | End of Life | End of Life | End of Life | End of Life |
| Supply Voltage | 5 V | 5 V | 5 V | 5 V | 5 V |
Bảo phân biệt quan trọng
- Integrated MSCAN08 CAN 2.0 A/B controller on-chip (vsMC908GZ32VFUE)
- 32KB FLASH vs 60KB FLASH memory class (vsMC908AZ60ACFU)
- Same 64-QFP footprint as the broader HC08 AZ/AB family (vsMC908AB32CFUE)
Ghi chú thiết kế
Layout the 64-QFP (14x14, 0.8mm pitch) footprint with a ground plane under the package to provide thermal spreading and to reduce digital switching noise coupling into the analog ADC inputs. Keep the OSC1/OSC2 crystal traces short (under 10mm) and guard them with a ground ring to minimize jitter. Place the VDD/VSS decoupling pair (100nF + 10uF) within 3mm of pins 31 and 32, and add a separate VDDA/VSSA ferrite bead pair for the ADC supply to isolate analog return currents from noisy digital ground.
The MSCAN08 CAN TXCAN/RXCAN pins must be routed to the external TJA1050/TJA1040 transceiver with controlled impedance (typically 120 ohm differential) and a common-mode choke for conducted emissions. Place the transceiver close to the MCU and add a TVS diode (such as NXP PESD1CAN) at the bus connector for ESD and automotive transient protection (ISO 7637-2). Verify that the CAN-H and CAN-L traces are matched in length (delta under 5mm) to maintain signal symmetry.
Estimated: firmware written for the AZ32A is largely portable to AZ60A, but check the EEPROM size, ADC channel count, and timer module availability before declaring drop-in compatibility. The BKGD pin (pin 36) is shared with a mode-select function; ensure no external pull-up/down conflicts with the BDM programmer during in-circuit FLASH programming. The RST pin (pin 35) must have an external 10k pull-up to VDD for reliable startup - do not rely solely on internal pull-up.
Estimated: at 5V supply and 8MHz bus clock, the MC908AZ32AVFUE dissipates approximately 50-100mW depending on peripheral activity. The 64-QFP (14x14) package has a typical theta_JA of 50-60 C/W on a 4-layer PCB, giving a junction-to-ambient rise of 5-6 C above ambient at full load. In an automotive under-hood environment (ambient 85 C), plan for thermal derating and verify the plastic-package junction-temperature limit of 150 C is not exceeded.
Thông tin tuân thủ
AEC-Q100 automotive grade per Freescale/NXP product family documentation. RoHS/REACH status not confirmed in retrieved data - confirm with NXP or distributor before use in RoHS-critical designs.
