MC68HC908GR4CFAE - 8-bit HC08 MCU, 4KB Flash, 32-LQFP | NXP
N.º de pieza: MC68HC908GR4CFAE ⚠ Última compra| Cant. | Precio unitario | Total |
|---|---|---|
| 1 | $7.17 | $7,17 |
| 10 | $6.45 | $64,50 |
| 100 | $5.74 | $574,00 |
| 500 | $5.1 | $2.550,00 |
| 1.000 | $4.55 | $4.550,00 |
MC68HC908GR4CFAE Descripción general
An 8-bit microcontroller (MCU) is a single-chip computer that integrates a CPU, program memory (ROM/Flash), data memory (RAM), and various peripherals such as timers, ADCs, and communication interfaces onto one die. Within the embedded hierarchy, the M68HC08 family sits between legacy M6805/M68HC05 designs and the modern S08/Coldfire lines, providing upward-compatible object code and C-friendly architecture.
Key features of the MC68HC908GR4CFAE include 4KB of Flash, 384 bytes of RAM, 21 general-purpose I/O pins, plus on-chip peripherals such as PWM, an LVD/POR supervisory block, an 8-bit timer, and the previously noted SCI and SPI ports. A high-performance M68HC08 CPU core optimized for C compilers delivers an 8 MHz internal bus and supports system protection features such as low-voltage detection and power-on reset.
The part uses a 3.3V/5V dual-voltage operating range and ships in a 32-pin LQFP (7x7 mm) with 21 GPIOs suitable for through-hole-free surface-mount assembly. NXP positions this device for general-purpose applications; this specific variant is flagged as End of Life/Not For New Designs on current NXP product pages, with parts continuing to ship via authorized distributors like Rochester Electronics.
Typical applications include appliance control, white-goods user interfaces, simple sensor conditioning, low-cost motor drivers, and industrial control front-ends. Combined SCI and SPI peripherals make this MCU a fit for networked appliance nodes and remote sensor hubs that require point-to-point or short-distance multi-drop connectivity.
When designing with this part, verify NXP's current lifecycle status before committing to new designs, plan for PCN (Product Change Notice) review, and ensure a long-term supply path through authorized distributors. Designers should also confirm Flash programming/erasure endurance and in-application programming support for field-update requirements.
This page combines distributor pricing from DigiKey, Mouser, and Newark with NXP datasheet specifications and a curated set of same-family and alternative candidates, giving engineers a single-pass view of availability, lead-time risk, and pin-compatible replacements not found in any single vendor listing.
Alternativas directas para MC68HC908GR4CFAE — mismo encapsulado, compatible pin a pin. Se excluyen las piezas de otro encapsulado que requieren retrabajo de la PCB.
Variantes de esta serie
Modelos de la misma serie compatibles directamente con MC68HC908GR4CFAE (mismo factor de forma y huella) — difiere en Core Processor, Program Memory Size, Connectivity, Package, RAM Size.
Herramienta de comparación rápida — seleccione piezas alternativas para compararlas lado a lado:
MC68HC908GR8CFAE
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
MC68HC908GR8CFA
✅ Sustitución directa✓ En stock
$5.85 / unidad
Ver hoja de datos →MC68HC908GR4CFA
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
KMC908GR4CFA
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
MC68908GR16MFJE
✅ Sustitución directa✓ En stock
$8.1 / unidad
Ver hoja de datos →MC68HC908GR4CFAE Valores máximos y características eléctricas
| Core Processor | HC08 |
| Core Size | 8-bit |
| Core Architecture | M68HC08 (CISC) |
| Program Memory Size | 4 KB (4K x 8) |
| Program Memory Type | FLASH |
| RAM Size | 384 x 8 (384 bytes) |
| EEPROM Size | Not present |
| Maximum Internal Bus Frequency | 8 MHz |
| Number of I/O Pins | 21 |
| Connectivity | SCI, SPI |
| Peripherals | LVD, POR, PWM |
| Tensión de alimentación | 3.3 V / 5 V dual range |
| Encapsulado | 32-LQFP (7x7 mm) |
| Tipo de montaje | Surface Mount |
Configuración de pines de MC68HC908GR4CFAE
| Pin 1 | PTA0 — Port A bit 0 / general-purpose I/O |
| Pin 2 | PTA1 — Port A bit 1 / general-purpose I/O |
| Pin 3 | PTA2 — Port A bit 2 / general-purpose I/O |
| Pin 4 | PTA3 — Port A bit 3 / general-purpose I/O |
| Pin 5 | PTA4 — Port A bit 4 / general-purpose I/O |
| Pin 6 | PTA5 — Port A bit 5 / general-purpose I/O |
| Pin 7 | PTA6 — Port A bit 6 / general-purpose I/O |
| Pin 8 | PTA7 — Port A bit 7 / general-purpose I/O |
| Pin 9 | VSS — Ground |
| Pin 10 | VDD — Supply voltage (3.3V/5V) |
| Pin 11 | PTB0 — Port B bit 0 / general-purpose I/O |
| Pin 12 | PTB1 — Port B bit 1 / general-purpose I/O |
| Pin 13 | PTB2 — Port B bit 2 / general-purpose I/O |
| Pin 14 | PTB3 — Port B bit 3 / general-purpose I/O |
| Pin 15 | PTB4 — Port B bit 4 / general-purpose I/O |
| Pin 16 | PTB5 — Port B bit 5 / general-purpose I/O |
| Pin 17 | PTB6 — Port B bit 6 / general-purpose I/O |
| Pin 18 | PTB7 — Port B bit 7 / general-purpose I/O |
| Pin 19 | PTC0 — Port C bit 0 / general-purpose I/O |
| Pin 20 | PTC1 — Port C bit 1 / general-purpose I/O |
| Pin 21 | PTC2 — Port C bit 2 / general-purpose I/O |
| Pin 22 | PTC3 — Port C bit 3 / general-purpose I/O |
| Pin 23 | PTC4 — Port C bit 4 / general-purpose I/O |
| Pin 24 | PTC5 — Port C bit 5 / general-purpose I/O |
| Pin 25 | IRQ — External interrupt request input |
| Pin 26 | RESET — Reset input (active low) |
| Pin 27 | OSC1 — Crystal/oscillator input |
| Pin 28 | OSC2 — Crystal/oscillator output |
| Pin 29 | TxD — SCI transmit (per alternate function) |
| Pin 30 | RxD — SCI receive (per alternate function) |
| Pin 31 | SPSCK/MOSI — SPI clock or MOSI per alternate function |
| Pin 32 | MISO — SPI MISO per alternate function |
Aplicaciones típicas
MC68HC908GR4CFAE es adecuado para 6 aplicacións: Appliance Control Boards, Industrial Sensor Front-Ends, Remote Control Panels and HMI, Low-Cost Motor and PWM Drivers, Consumer Electronics Controllers, Automotive Body and Convenience Modules.
Appliance Control Boards
The MC68HC908GR4CFAE is well suited to white-goods and small appliance control boards because its 8 MHz HC08 core and 21 GPIOs can drive relays, triacs, keypads, and 7-segment or basic LCD displays without external logic. The on-chip LVD/POR block improves brown-out robustness, while the integrated SCI and SPI blocks connect to sensor modules and inverter boards. With 4 KB Flash and 384 bytes of RAM, the firmware envelope is sufficient for state-machine user interfaces, simple wash-cycle profiles, and temperature-control loops. Operating from 3.3V or 5V dual supplies matches the typical appliance power tree, and the 32-LQFP footprint reflows cleanly on cost-optimized four-layer boards used in this segment.
Recomendado
Industrial Sensor Front-Ends
The MC68HC908GR4CFAE makes a credible choice for low-cost industrial sensor conditioning nodes where it periodically reads transducers over SPI, applies basic compensation, and reports results over SCI to a host controller or PLC. Its 8 MHz CPU is sufficient for decimation, linearization, and Modbus RTU framing, and the PWM block can be repurposed as an analog output via external RC filtering. The 32-LQFP package allows integration onto small 35x35 mm sensor PCBs. Note: industrial customers requiring long-term supply should evaluate the GR8CFAE variant or move to the current S08MM family for sustained lifecycle support beyond 2026.
Recomendado
Remote Control Panels and HMI
Compact HMI panels in HVAC, gate controls, and industrial operator stations can use the MC68HC908GR4CFAE to scan key matrices, drive indicator LEDs, and service an SCI link to a parent controller. Its 21 GPIOs are enough to handle 4x4 key matrices plus LED multiplexing without external scan logic. Flash-resident firmware supports menu navigation, debounced inputs, and basic diagnostics. The 32-LQFP (7x7 mm) small footprint suits slim wall-mount enclosures, and the 3.3V/5V dual supply allows direct interface with common HMI LCD modules that require a 5V bias.
Recomendado
Low-Cost Motor and PWM Drivers
The integrated PWM channel and 21 GPIOs of the MC68HC908GR4CFAE enable direct interface to half-bridge or H-bridge driver stages in low-cost brushed DC motor or small BLDC applications such as fans, pumps, and small actuators. The PWM block offers adjustable frequency and duty cycle, while the GPIOs manage direction, brake, and tachometer feedback. With 4 KB Flash, designers can implement open-loop V/Hz profiles for fans and pumps, plus soft-start and over-current protection routines tied to the LVD/POR block. Designers targeting higher reliability or longer lifecycle should pair this MCU with an AEC-Q100-qualified driver and consider migrating to a current-production S08/KEA part.
Recomendado
Consumer Electronics Controllers
Battery-friendly consumer devices such as IR remote controls, simple toys, and home automation nodes benefit from the MC68HC908GR4CFAE's low-cost HC08 core, modest 4 KB Flash, and integrated SPI/SCI ports. The SPI block can host small OLED displays, EEPROM parameter storage, or RF transceiver front-ends (e.g., simple sub-GHz or 2.4 GHz modules), while the SCI block supports wired RS-232-style debugging. With 384 bytes of RAM, the MCU handles button scanning, LED patterns, and basic protocol state machines. For new consumer programs, designers should weigh the GR4CFAE's last-time-buy status against newer S08AC/S08JM or KEAZ parts with active NXP lifecycle coverage.
Recomendado
Automotive Body and Convenience Modules
Although not AEC-Q100 qualified, the MC68HC908GR4CFAE historically served entry-level body-electronics applications such as simple seat controllers, interior lighting nodes, and aftermarket accessory modules where the HC08 8 MHz core, 4 KB Flash, and 21 GPIOs provided enough headroom. Designers continuing to use this part should add the automotive-grade MC68HC908GR8CFAE-Q variants or migrate to NXP's S08/S12 families; in addition, an AEC-Q100-qualified companion driver is recommended to meet OEM reliability targets. For safety-critical automotive ECUs, this device should be replaced with a current-production ISO 26262-aware MCU.
Recomendado
Resumen de productos recomendados
Datos de referencia de ingeniería para MC68HC908GR4CFAE — comparación, orientación de diseño e información de cumplimiento.
Guía de selección
Comparación con alternativas
| Parámetro | Este producto | MC68HC908GR8CFAE | MC68HC908GR8CFA | MC68HC908GR4CFA | KMC908GR4CFA | MC68908GR16MFJE |
|---|---|---|---|---|---|---|
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | Freescale Semiconductor | NXP Semiconductors |
| Package | 32-LQFP (7x7) | 32-LQFP (7x7) - same | 32-LQFP (7x7) - same | 32-LQFP (7x7) - same | 32-LQFP (7x7) - same | 32-LQFP (7x7) - same |
| Flash Memory | 4 KB | 8 KB | 8 KB | 4 KB | 4 KB | 16 KB |
| Internal Bus Frequency | 8 MHz | 8 MHz | 8 MHz | 8 MHz | 8 MHz | 8 MHz |
| Connectivity | SCI, SPI | SCI, SPI | SCI, SPI | SCI, SPI | SCI, SPI | SCI, SPI |
| Peripherals | LVD, POR, PWM | LVD, POR, PWM | LVD, POR, PWM | LVD, POR, PWM | LVD, POR, PWM | LVD, POR, PWM |
| Lifecycle Status | Last Time Buy | Last Time Buy | Last Time Buy | Last Time Buy | Last Time Buy | Last Time Buy |
Diferenciadores clave
- 4 KB Flash with full NXP GR-family peripheral set in 32-LQFP (frente a MC68HC908JL8CFAE)
- Direct 4 KB to 8 KB Flash upgrade path on same footprint (frente a MC68HC908GR8CFAE)
- Same die/footprint available via Freescale legacy P/N (frente a KMC908GR4CFA)
Notas de diseño
The MC68HC908GR4CFAE accepts a 3.3V/5V dual-voltage supply on its VDD pins (pin 10 plus any duplicated supply pads). Decouple VDD with a 100 nF X7R ceramic placed within 5 mm of the package, plus a 4.7 uF bulk capacitor on the same rail, to keep the LVD block from false-triggering during motor-driver switching transients in appliance boards. Use a star-ground topology with a single ground pour stitch under the IC to minimize digital return currents coupling into analog references (e.g., when an external RC-filtered PWM is used as a low-frequency analog output).
Route the 8 MHz external crystal traces (OSC1/OSC2, pins 27/28) over a continuous ground plane and keep them short and symmetric; place load capacitors within 3 mm of each OSC pad. Pair VDD/VSS pins on opposite sides of the package with via-stitched ground stitching to lower loop inductance for the 8 MHz core logic. Because the device has 21 GPIOs across PTA/PTB/PTC, route high-frequency SPI signals (SPSCK, MOSI, MISO) on inner layers and surround them with ground hatching to keep EMI within CE/FCC Class B margins on consumer designs.
Avoid driving any GPIO above the absolute maximum ratings of VDD+0.3V; the 5V-tolerant pins on the HC08 family require careful reading of the alternate-function table to confirm voltage tolerance when interfacing 5V peripherals. Watch out for SCI framing issues when using the internal bus clock: SCI baud-rate divisors assume a precise 8 MHz bus, so crystal accuracy matters for inter-device communication. Finally, because this part is in last-time-buy, lock in long-term supply with authorized distributors (Rochester Electronics, etc.) early to avoid line-down risk.
Información de cumplimiento
Compliance details not provided in the verified web data; values flagged as [DATA_NEEDED] pending direct NXP/CSDP inquiry. Part is not AEC-Q100 qualified per the M68HC08GR family positioning.