MC68HC908GZ8VFJ - 8MHz 8KB Flash 8-bit HC08 MCU | NXP
N.º da peça: MC68HC908GZ8VFJ ✗ Fim de vida| Qtd. | Preço unitário | Total |
|---|---|---|
| 1 | $12.5 | $12,50 |
| 10 | $11.2 | $112,00 |
| 100 | $9.85 | $985,00 |
| 500 | $8.6 | $4.300,00 |
| 1.000 | $7.4 | $7.400,00 |
MC68HC908GZ8VFJ Visão geral
An 8-bit microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory (ROM/FLASH), data memory (RAM), timers, communication peripherals, and I/O onto one die. The MC68HC908GZ8 belongs to the HC08 family, NXP/Freescale's widely deployed 8-bit architecture that evolved from the earlier M68HC05 series. Within the broader taxonomy, HC08 sits below 16/32-bit cores such as HCS12, ColdFire, and ARM Cortex-M, and is selected when cost, deterministic behaviour, and code density outweigh raw MIPS needs.
Key features of the MC68HC908GZ8VFJ include an 8 MHz internal bus frequency from a Clock Generation Module that supports 1-8 MHz crystals, an MSCAN08 controller implementing CAN 2.0B (per Bosch September 1991 spec), FLASH program memory security, and on-chip programming firmware that allows in-system programming without high voltage. Additional peripherals typical of the GZ family include an 8-channel 10-bit ADC, multiple timers (TBM, TIM08), and SCI/SPI interfaces.
Architecturally, the HC08 core uses a von Neumann bus with 16-bit addressing for linear memory access, a B accumulator pair, and H register for indexed operations. The integrated MSCAN08 peripheral enables robust CAN networking for automotive body and chassis applications. Security features include FLASH security bytes to prevent unauthorized read-out of program code, plus a monitor ROM for factory test and user programming.
Typical applications include CAN node automotive body controllers, HVAC control modules, instrument clusters, industrial CAN-based sensor interfaces, and low-cost appliance control. The combination of FLASH, CAN, ADC, and timer resources makes the GZ8 particularly suited to distributed nodes on a CAN bus that require local analog sensing and actuator drive.
When designing with this device, plan for an external CAN transceiver such as the TJA1050 or MC33901 to interface between the MCU's TTL-level MSCAN08 pins and the physical CAN bus. The 32-LQFP is footprint-compatible with other 68HC908GZ-family variants, enabling reuse when scaling FLASH/RAM up to the GZ16 or GZ60.
This page synthesizes distributor pricing, drop-in compatible alternatives from the same GZ family, and practical design notes not consolidated in the manufacturer datasheet.
Alternativas drop-in para MC68HC908GZ8VFJ — mesmo encapsulamento, compatível pino a pino. Peças de encapsulamento diferente que exigem retrabalho na PCB são excluídas.
Ferramenta de comparação rápida — selecione peças alternativas para comparação lado a lado:
MC68HC908GZ16
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
MC68HC908GZ48CFA
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
MC68HC908GZ60
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
MC68HC908GZ8MFA
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
MC68HC908GZ8CFJ
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
MC68HC908GZ8VFJ Classificações máximas e características elétricas
| Core Architecture | HC08 (8-bit M68HC08 family) |
| Internal Bus Frequency | 8 MHz |
| Program Memory (FLASH) | 8 KB (8K x 8) |
| Encapsulamento | 32-LQFP (7x7 mm) |
| Tipo de montagem | Surface Mount |
| CAN Controller | MSCAN08 (CAN 2.0B per Bosch 09/1991 spec) |
| Crystal Range (CGM) | 1 MHz to 8 MHz |
| Serial Interfaces | SCI + SPI |
| FLASH Security | Yes (security bytes for code protection) |
| In-System Programming | Yes (monitor ROM, no high voltage required) |
Configuração de pinos do MC68HC908GZ8VFJ
| Pino 1 | VDDR — Voltage regulator supply (internal voltage regulator power) |
| Pino 2 | VSS — Ground |
| Pino 3 | VDDA — Analog supply voltage for ADC |
| Pino 4 | VSSA — Analog ground for ADC |
| Pino 5 | PTE0/TxD — GPIO / SCI transmit |
| Pino 6 | PTE1/RxD — GPIO / SCI receive |
| Pino 7 | PTE2 — GPIO |
| Pino 8 | PTE3 — GPIO |
| Pino 9 | PTD0/SS — GPIO / SPI slave select |
| Pino 10 | PTD1/MISO — GPIO / SPI master-in slave-out |
| Pino 11 | PTD2/MOSI — GPIO / SPI master-out slave-in |
| Pino 12 | PTD3/SPSCK — GPIO / SPI clock |
| Pino 13 | PTC0/CANTX — GPIO / MSCAN08 transmit |
| Pino 14 | PTC1/CANRX — GPIO / MSCAN08 receive |
| Pino 15 | PTC2 — GPIO |
| Pino 16 | PTC3 — GPIO |
| Pino 17 | PTB0/ADC0 — GPIO / ADC channel 0 |
| Pino 18 | PTB1/ADC1 — GPIO / ADC channel 1 |
| Pino 19 | PTB2/ADC2 — GPIO / ADC channel 2 |
| Pino 20 | PTB3/ADC3 — GPIO / ADC channel 3 |
| Pino 21 | PTB4/ADC4 — GPIO / ADC channel 4 |
| Pino 22 | PTB5/ADC5 — GPIO / ADC channel 5 |
| Pino 23 | PTB6/ADC6 — GPIO / ADC channel 6 |
| Pino 24 | PTB7/ADC7 — GPIO / ADC channel 7 |
| Pino 25 | PTA0 — GPIO |
| Pino 26 | PTA1 — GPIO |
| Pino 27 | PTA2 — GPIO |
| Pino 28 | PTA3 — GPIO |
| Pino 29 | IRQ/TBMCLK — External interrupt / Time Base Module clock input |
| Pino 30 | RST — Reset input (active low) |
| Pino 31 | OSC1 — Crystal oscillator input (CGM, 1-8 MHz) |
| Pino 32 | OSC2 — Crystal oscillator output (CGM) |
Aplicações típicas
MC68HC908GZ8VFJ é adequado para 6 aplicaçãos: Automotive CAN Body Control Module, HVAC Control Module, Automotive Instrument Cluster Node, Industrial CAN-Based Sensor Interface, Low-Cost Appliance Control Board, CAN-Enabled Security and Access Panel.
Automotive CAN Body Control Module
The MC68HC908GZ8VFJ is a strong fit for distributed automotive body controller nodes because its integrated MSCAN08 controller implements CAN 2.0B per the Bosch 09/1991 specification directly on-die, removing the need for an external CAN controller. With an 8 MHz HC08 core and 8 KB of FLASH, the GZ8 can run body-control message handlers, debounce switch inputs, and drive lamp relays. The 32-LQFP footprint is small enough for door-module and seat-controller PCBs, and the on-chip 10-bit ADC handles analog ratiometric sensor inputs from seat-position or mirror-angle pots. In a typical design the MCU sits behind an NXP TJA1050 or TJA1040 transceiver that converts TTL CANTX/CANRX to the differential CANH/CANL bus. Compared with adding a discrete CAN controller to an 8-bit MCU, the integrated MSCAN08 reduces BOM cost and frees PCB area for the relay-driver stage.
Recomendado
HVAC Control Module
Heating, ventilation, and air-conditioning (HVAC) modules benefit from the MC68HC908GZ8VFJ's combination of 10-bit ADC for mixed-signal temperature sensors, timer channels for PWM blower control, and SCI for communication with the dashboard controller. The 8 MHz HC08 core executes the closed-loop temperature algorithm and CAN stack concurrently, while FLASH security bytes protect the OEM calibration table from unauthorized read-back. The 32-LQFP package provides ample GPIO for keypad scan, LED status, and backlight drive. A practical HVAC board places the GZ8 alongside a TJA1050 CAN transceiver and a single N-channel MOSFET blower driver; the MCU's PWM output modulates blower speed with 10-bit resolution. Power consumption is modest because the HC08 core parks in WAIT or STOP mode between CAN frames.
Recomendado
Automotive Instrument Cluster Node
Instrument clusters increasingly use distributed CAN nodes to drive stepper-motor gauges, LCD segments, and tell-tale LEDs. The MC68HC908GZ8VFJ's MSCAN08 receives vehicle-speed and engine-RPM messages over the bus, while its timers generate the precise step pulses for air-core gauges. FLASH security bytes prevent cloning of OEM gauge calibration curves. In a cluster reference design the GZ8 sits on a small sub-board connected to the main cluster MCU via CAN, simplifying harness routing and reducing the main board's pin count. Compared to using a larger 16-bit MCU for every gauge, the GZ8 keeps node cost below one dollar while still providing deterministic real-time behaviour through the HC08's simple interrupt model and small, predictable interrupt latency.
Recomendado
Industrial CAN-Based Sensor Interface
Distributed industrial sensors on a CANopen or DeviceNet backbone are an excellent fit for the MC68HC908GZ8VFJ. The 10-bit ADC digitizes analog sensor signals (pressure, temperature, level), the MSCAN08 publishes them as CAN frames, and FLASH holds the calibration coefficients. The wide operating temperature and 32-LQFP's small footprint suit IP65 sensor housings. In a typical pressure-transmitter design the GZ8 reads a bridge sensor via the ADC, applies linearization in software, and broadcasts the result as a CAN PDO every 100 ms; the external TJA1050 handles bus arbitration and fault tolerance. Compared with 4-20 mA loops, CAN-based sensors reduce wiring and enable plug-and-play node addition.
Recomendado
Low-Cost Appliance Control Board
White goods such as washing machines, dishwashers, and refrigerators use 8-bit MCUs to control motors, valves, and user interfaces. The MC68HC908GZ8VFJ offers 8 KB FLASH for the main control loop, 10-bit ADC for water-level or temperature sensing, and timer PWMs for motor-speed control. The 32-LQFP footprint is cost-effective and provides enough GPIO for the keypad, LED matrix, and relay drivers. In a washing-machine reference design the GZ8 reads water temperature via the ADC, drives the drum motor with a PWM channel through an optoisolator + triac, and sequences the inlet valves. Compared with older HC05 designs, the FLASH-based GZ8 supports in-system firmware updates without removing the board from the appliance.
Recomendado
CAN-Enabled Security and Access Panel
Building-security keypads, card-reader controllers, and access panels benefit from the MC68HC908GZ8VFJ's MSCAN08 for centralized reporting to a building-management controller over CAN. The 8 KB FLASH holds the credential database and access logic, the 10-bit ADC monitors tamper switches and battery voltage, and FLASH security bytes protect the credential table. The 32-LQFP (7x7 mm) package is small enough to fit inside a standard EU 60-mm electrical back-box. A typical design wires the GZ8 to a TJA1050 transceiver and to a Wiegand card reader; access events are reported as CAN messages while the local keypad provides offline PIN entry. Compared with RS-485 panels, CAN provides deterministic arbitration and built-in error handling that improves reliability in electrically noisy building environments.
Recomendado
Resumo dos produtos recomendados
Dados de referência de engenharia para MC68HC908GZ8VFJ — comparação, orientação de projeto e informações de conformidade.
Guia de seleção
Comparação com alternativas
| Parâmetro | Este produto | MC68HC908GZ16 | MC68HC908GZ48CFA | MC68HC908GZ60 | MC68HC908GZ8MFA | MC68HC908GZ8CFJ |
|---|---|---|---|---|---|---|
| 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 (7x7 mm) - same |
| Core Architecture | HC08 (8-bit) | HC08 (8-bit) | HC08 (8-bit) | HC08 (8-bit) | HC08 (8-bit) | HC08 (8-bit) |
| Internal Bus Frequency | 8 MHz | 8 MHz | 8 MHz | 8 MHz | 8 MHz | 8 MHz |
| Program Memory (FLASH) | 8 KB | 16 KB | 48 KB | 60 KB | 8 KB | 8 KB |
| MSCAN08 CAN 2.0B Controller | Yes | Yes | Yes | Yes | Yes | Yes |
| FLASH Security Bytes | Yes | Yes | Yes | Yes | Yes | Yes |
| In-System Programming | Yes (monitor ROM, no high voltage) | Yes | Yes | Yes | Yes | Yes |
Principais diferenciais
- Integrated MSCAN08 CAN 2.0B controller on-die (vs Generic 8-bit MCU without CAN)
- 8 MHz HC08 core with FLASH security and monitor-ROM ISP (vs Mask-ROM HC05 predecessors)
- 32-LQFP (7x7 mm) footprint shared across the entire GZ family (vs MC68HC908GZ16 / GZ48 / GZ60)
Notas de projeto
The MC68HC908GZ8VFJ integrates an internal voltage regulator powered via the VDDR pin; place a 0.1 uF decoupling capacitor directly between VDDR and VSS, plus a bulk 4.7-10 uF tantalum or ceramic on the VDD rail. Analog VDDA must be tied to VDD through a ferrite bead or small filter resistor and bypassed with a 0.1 uF + 10 uF capacitor pair to keep ADC noise low. Source: NXP MC68HC908GZ8 datasheet power-supply recommendations.
Route the CANTX and CANRX traces from the MSCAN08 pins to the TJA1050 transceiver as a short differential pair, keep them away from PWM or relay-driver switching nodes, and place the transceiver's split termination (typically 60 ohm between CANH and CANL with capacitor to ground) close to the bus connector. Route OSC1/OSC2 traces short and symmetric, and keep them clear of the analog ADC inputs to avoid clock feedthrough into measurements.
Avoid leaving unused PTC/PTB pins floating when they are configured as inputs - tie them to VDD or VSS through 10 kohm resistors to prevent shoot-through current in the input structures. Confirm that the FLASH security bytes are programmed after final code load to lock read-out; once secured, mass-erase through the monitor ROM is the only recovery path. When migrating from GZ8 to GZ16, verify vector remapping because the larger FLASH changes the reset vector placement.
Informações de conformidade
Specific RoHS/REACH/AEC-Q100 status for MC68HC908GZ8VFJ was not present in the verified web data; consult the latest NXP product environmental compliance documentation. The GZ family is generally AEC-Q100 capable for automotive nodes, but qualification is suffix-dependent - verify the exact part marking against NXP's automotive-grade catalogue before use in safety-relevant systems.