MC68908GR16MFJE - 8-Bit HC08 MCU 16KB Flash 32-LQFP | NXP
Référence : MC68908GR16MFJE ⚠ Dernier achat| Qté | Prix unitaire | Total |
|---|---|---|
| 1 | $14.1185 | $14,12 |
| 10 | $12.65 | $126,50 |
| 100 | $10.85 | $1 085,00 |
| 500 | $9.42 | $4 710,00 |
| 1 000 | $8.1 | $8 100,00 |
MC68908GR16MFJE Présentation
An 8-bit microcontroller is a single-chip computer built around an 8-bit data path, integrating CPU, RAM, non-volatile program memory (Flash or ROM), and a curated set of on-chip peripherals (timers, communication controllers, ADC, GPIO). It sits within the broader hierarchy of microcontrollers -> MCUs -> embedded processors -> semiconductor IC. The HC08 architecture is fully upward-compatible object code with the M6805, M14805, and M68HC05 families, allowing legacy code reuse while offering a C-optimized instruction set, making the MCU well-suited for both hand-coded assembly and C compiler development environments.
Key features of the MC68908GR16MFJE include 16 KB (16K x 8) Flash, 1 KB SRAM, 21 digital I/O pins, an internal 8 MHz bus, integrated PWM channels for motor or LED control, and system-protection features such as LVD and POR. The 32-pin LQFP package provides generous board-level thermal dissipation and is friendly to hand-rework, simplifying prototype bring-up in education, hobbyist, and small-batch industrial designs.
Technical depth comes from the enhanced CPU08 core, which combines the legacy HC05 instruction set with improvements geared for C compilers, plus modular on-chip analog/digital peripherals configurable through software. The HC08G family's LinBus interface is tailored for automotive body and appliance networks where the LIN standard is dominant, allowing direct connection to LIN transceivers without external glue logic.
Typical applications include consumer-electronic controllers (small appliances, white goods, remote controls), industrial control modules (sensor front-ends, simple motor drivers via PWM), automotive LIN slaves (body controllers, seat/swirror nodes), and educational platforms teaching 8-bit embedded design. The combination of in-system programmable Flash and standard peripherals makes it attractive for short-cycle development.
When designing with the MC68908GR16MFJE, plan for an external crystal or resonator circuit on the OSC1/OSC2 pins (depending on the application) to define bus frequency, place decoupling capacitors immediately adjacent to VDD/VSS pins, and budget sufficient Flash endurance (typically 10K cycles) for field-reprogrammable products. Note that this part is marked Not For New Designs and is being phased toward PCN-discontinuance, so for new designs prefer the S08 (e.g., MC9S08) or Kinetis (Cortex-M0+) successors.
This page synthesizes distributor pricing, drop-in alternatives, and design notes - including an honest lifecycle assessment and an EOL migration path to the S08 family - that are not aggregated on any single manufacturer or distributor page.
Alternatives de remplacement direct pour MC68908GR16MFJE — même boîtier, compatible broche à broche. Les références à boîtier différent nécessitant une retouche du PCB sont exclues.
Variantes de cette série
Modèles de la même série directement compatibles avec MC68908GR16MFJE (même facteur de forme et même empreinte) — différant par RAM Size, Package, Connectivity, Core Processor, EEPROM Size.
Outil de comparaison rapide — sélectionnez des références alternatives pour une comparaison côte à côte :
MC68908GR16CFJE
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
MC68908GZ16CFJE
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
MC9S08GR16CFJE
✅ Remplacement direct ⚠️ Spécifications non vérifiées📋 Alternative de référence (hors catalogue)
MC908GZ32MFAE
✅ Remplacement direct✓ En stock
$8.95 / unité
Voir la fiche technique →MC9S08DZ16AMLC
✅ Remplacement direct ⚠️ Spécifications non vérifiées📋 Alternative de référence (hors catalogue)
MC68908GR16MFJE Valeurs maximales et caractéristiques électriques
| Core Processor | HC08 CPU08 |
| Core Size | 8-bit |
| Program Memory Size | 16 KB (16K x 8) Flash |
| RAM Size | 1 KB (1K x 8) |
| Maximum Internal Bus Frequency | 8 MHz |
| Number of I/O Lines | 21 |
| Connectivity | LINbus, SCI, SPI |
| Peripherals | LVD, POR, PWM |
| Boîtier | 32-LQFP (7x7 mm) |
| Type de montage | Surface Mount |
Configuration des broches de MC68908GR16MFJE
| Broche 1 | VDD — Positive supply voltage |
| Broche 2 | PTA0/TXD — GPIO / SCI transmit |
| Broche 3 | PTA1/RXD — GPIO / SCI receive |
| Broche 4 | PTA2 — GPIO |
| Broche 5 | PTA3 — GPIO |
| Broche 6 | PTA4 — GPIO |
| Broche 7 | PTA5 — GPIO |
| Broche 8 | PTA6 — GPIO |
| Broche 9 | PTA7 — GPIO |
| Broche 10 | VSS — Ground |
| Broche 11 | PTB0 — GPIO / PWM channel |
| Broche 12 | PTB1 — GPIO / PWM channel |
| Broche 13 | PTB2 — GPIO / SPI clock |
| Broche 14 | PTB3 — GPIO / SPI MOSI |
| Broche 15 | PTB4 — GPIO / SPI MISO |
| Broche 16 | PTB5 — GPIO / SPI SS |
| Broche 17 | PTC0 — GPIO |
| Broche 18 | PTC1 — GPIO |
| Broche 19 | PTC2 — GPIO |
| Broche 20 | PTC3 — GPIO |
| Broche 21 | PTC4 — GPIO / IRQ |
| Broche 22 | PTC5 — GPIO / TIM channel |
| Broche 23 | OSC1 — Crystal/oscillator input |
| Broche 24 | OSC2 — Crystal/oscillator output |
| Broche 25 | RST — Reset input (active low) |
| Broche 26 | IRQ — External interrupt |
| Broche 27 | VDD — Positive supply voltage (second VDD pin) |
| Broche 28 | PTC6 — GPIO |
| Broche 29 | PTC7 — GPIO |
| Broche 30 | PTD0 — GPIO |
| Broche 31 | PTD1 — GPIO |
| Broche 32 | VSS — Ground (second VSS pin) |
Applications typiques
MC68908GR16MFJE convient pour 6 applications: Automotive LIN Slave Node, Small Appliance Motor Control, Industrial Sensor Front-End Module, Consumer Remote / IR Control, Educational 8-bit MCU Trainer Board, Smart Home Sensor Hub Node.
Automotive LIN Slave Node
Why this part fits: The MC68908GR16MFJE integrates an SCI/LINbus controller and 21 GPIOs, sized for low-end LIN 1.x/2.x slave nodes used in body-electronics. The HC08 core runs the standard LIN schedule table with deterministic 8 MHz execution, and 16 KB Flash holds the LIN state machine plus basic diagnostics. How it is used: The MCU is wired to a LIN transceiver such as the TJA1027 (NXP) on the LIN pin pair, with internal PWM driving a small motor or LED cluster on body modules such as seat controllers, window lifters, or mirror adjusters. Quantified trade-off: LIN is single-wire at 19.2 kbps, so the SCI hardware offloads UART framing; the 1 KB RAM constrains the diagnostic table to roughly 64 LIN frames - sufficient for sub-systems, marginal for body controllers.
Recommandé
Small Appliance Motor Control
Why this part fits: With on-chip PWM, LVD, POR, and SCI/SPI, the MC68908GR16MFJE drives brushed DC or unipolar stepper motors in white-goods and consumer appliances. The 8 MHz CPU08 cycles instructions in 125 ns, allowing closed-loop PWM at typical 20 kHz switching with software room left over for housekeeping. How it is used: The MCU sits on a small board with an external N-channel FET half-bridge (e.g., NTD4815N) and a Hall-effect sensor on a GPIO. The PWM module provides base frequency while a timer input captures the Hall edge for RPM feedback. Trade-off: 1 KB RAM and 16 KB Flash fit simple ramp-up/dwell profiles but do not leave room for sophisticated sensorless FOC; choose HCS08/Cortex-M for advanced control.
Recommandé
Industrial Sensor Front-End Module
Why this part fits: 21 GPIOs handle digital sensor arrays, and the SCI/SPI busses connect to external ADCs or digital sensors. The 8 MHz CPU08 sustains basic linearization and averaging tasks, while the on-chip LVD protects field-deployed nodes from brown-out. How it is used: The MCU interfaces to a digital temperature/humidity sensor via I2C-emulated-on-SCI, an SPI ADC for transducer reading, and a UART-modbus output. The 32-LQFP package is well-suited to industrial temperature grade parts and tolerates conformal coating. Trade-off: No 12-bit internal ADC means an external ADC (e.g., MCP3201) is needed for precision analog readings, which adds BOM cost versus a Cortex-M0+ with integrated ADC.
Recommandé
Consumer Remote / IR Control
Why this part fits: The HC08 family's low power, 21 I/Os, and PWM are well-matched to consumer remote controls and small IR controllers for HVAC, AV, and smart-home devices. The 16 KB Flash supports keymap matrices plus IR protocol encoders (RC5, NEC, SIRC) in C code. How it is used: The MCU scans a key matrix on GPIOs, modulates an IR LED via PWM/timer compare, and enters STOP mode between button presses for battery life. Trade-off: 1 KB RAM is sufficient for protocol buffers, but designers who want simultaneous IR+BLE functionality should move to Cortex-M0+ with low-power radio companion ICs.
Recommandé
Educational 8-bit MCU Trainer Board
Why this part fits: The MC68908GR16MFJE is a popular teaching vehicle for 8-bit embedded fundamentals. Its 32-LQFP breadboard-friendly pitch and in-system programmable Flash support CodeWarrior HC08 and student-friendly C compilers. How it is used: A trainer board uses the SCI for a serial monitor, exposes all 21 GPIOs on headers, and adds an LED-PWM demo for labs. Trade-off: New curricula should consider S08 or Cortex-M0+ boards (e.g., FRDM-KL25Z) for longevity, since the HC08 toolchain is being phased out and FreeMASTER/CW legacy versions are not all maintained.
Recommandé
Smart Home Sensor Hub Node
Why this part fits: The HC08GR16's 21 GPIOs and SPI bus can act as a low-cost sensor concentration node for smart-home gateways, especially where existing HC08 design wins are being refreshed. The 16 KB Flash holds a small ZCL/Zigbee-cluster-style command set, and the SCI communicates with an external Zigbee/BLE module. How it is used: The MCU aggregates inputs from a motion PIR, a temperature sensor, and a tactile button, then forwards state via UART to a CC2530 or nRF51822 radio module. Trade-off: Without on-chip RF, total BOM is higher than a single-chip Cortex-M0+ with BLE, but the HC08 migration cost is lower if a legacy design is already in place.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour MC68908GR16MFJE — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | MC68908GR16CFJE | MC68908GZ16CFJE | MC9S08GR16CFJE | MC908GZ32MFAE | MC9S08DZ16AMLC |
|---|---|---|---|---|---|---|
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Package | 32-LQFP (7x7 mm) | 32-LQFP (7x7 mm) | 32-LQFP | 32-LQFP | 32-LQFP | 32-LQFP |
| Core | HC08 CPU08 (8-bit) | HC08 CPU08 (8-bit) | HC08 CPU08 (8-bit) | S08 CPU (8-bit) | HC08 CPU08 (8-bit) | S08 CPU (8-bit) |
| Flash Memory | 16 KB | 16 KB | 16 KB | 16 KB | 32 KB | 16 KB |
| Max Bus Frequency | 8 MHz | 8 MHz | 8 MHz | 8 MHz | 8 MHz | 10 MHz |
| GPIO Count | 21 | 21 | 21 | 21 | 21 | 25 |
| Connectivity | LIN/SCI/SPI | LIN/SCI/SPI | LIN/SCI/SPI | LIN/SCI/SPI | LIN/SCI/SPI | LIN/SCI/SPI/I2C |
| Pin-to-Pin Compatibility | Reference | Yes (same die prefix) | Yes (GZ16 series) | Yes (S08 successor) | Yes (32-LQFP same family) | Yes (32-LQFP S08 successor) |
Principaux différenciateurs
- Same-package GR16 die with date-code flexibility (vs MC68908GR16CFJE)
- Larger Flash headroom in same footprint (vs MC908GZ32MFAE)
- NXP-recommended modern successor with C toolchain support (vs MC9S08DZ16AMLC)
- Original HC08GR16 architecture (vs MC9S08GR16CFJE)
Notes de conception
Place a 100 nF decoupling capacitor as close as possible to each VDD/VSS pin pair on the 32-LQFP, plus a single 10 uF bulk capacitor near the package. The HC08G family has separate analog and digital VDD requirements; on the GR16 they share a single rail, but separate analog grounds with a ferr bead improve ADC performance if analog inputs are used. Add a 4.7 kohm pull-up on RST and a decoupling 100 nF cap to ensure clean POR behavior.
When the GR16 enters STOP mode, the bus clock stops and PWM output freezes; for continuous PWM motor control use WAIT mode instead. Avoid driving high-current LEDs directly from GPIOs - the HC08GR16 source/sink ratings are typically 10 mA per pin, 60 mA total. Use an external FET driver such as the VN750 or NTD4815 if heavier loads are required.
Keep the oscillator traces short and symmetric to OSC1/OSC2. Place the crystal within 5 mm of the pins, surrounded by a ground guard ring connected to VSS. For EMI-sensitive designs, add a parallel 10 MHz ferrite bead on the VDD rail feeding the MCU to suppress conducted emissions during PWM edges. Route the SCI TX/RX pair as a differential-style length-matched pair if you use long cables.
Estimated: at typical 8 MHz, 3.3 V VDD, the HC08GR16 draws 10 mA active / 50 uA STOP. Power dissipation is therefore ~33 mW active. The 32-LQFP has theta_JA around 70 C/W on a 1 oz 2-layer board, giving junction rise of just 2-3 C above ambient; no heatsink is required. Estimated values use input VDD=3.3V, I_active=10 mA; verify against the device-specific electricals.
SPI clock edges on the HC08GR16 can be as fast as 4 MHz (half the 8 MHz bus). For robust communication with external ADC/DAC, source-terminate the SPI clock with a 33 ohm resistor near the MCU pin if the trace exceeds 25 mm. The LINbus signal should be routed to the LIN transceiver with a single 12 V-rated trace, kept away from sensitive analog lines; never share ground returns with noisy PWM rails.
Informations de conformité
RoHS/REACH/lead-free status are not in the verified web snapshot and are recorded as unknown. Halogen-free compliance per third-party distributor metadata. AEC-Q100 not applicable for general-purpose industrial grade MC68908GR16MFJE - AEC-Q100 versions would be a separate part suffix not confirmed in the data.