MC705C8ACFNER - 8-Bit 2.1MHz MCU, 8KB OTP | NXP
N.º de pieza: MC705C8ACFNER ✗ Fin de vida| Cant. | Precio unitario | Total |
|---|---|---|
| 1 | $13.7957 | $13,80 |
| 10 | $13.7957 | $137,96 |
| 100 | $13.7957 | $1.379,57 |
| 500 | $13.7957 | $6.897,85 |
| 1.000 | $13.7957 | $13.795,70 |
MC705C8ACFNER Descripción general
A microcontroller is a compact embedded-computing component that integrates a processor core, program memory, data memory, and peripherals into one package. The HC05 belongs to the 8-bit microcontroller hierarchy, where an integrated CPU executes firmware for control, measurement, communication, and automation tasks. OTP memory is intended for fixed programmed behavior and is not rewritable after programming.
The MC705C8ACFNER's principal verified features are its 8-bit HC05 architecture, 2.1 MHz operating speed, 8 KB OTP memory, 3.3 V or 5 V supply description, and 44-pin PLCC package. The listed 16.59 mm by 16.59 mm body size supports legacy through-hole PCB layouts when the original land pattern and pin function assignment are retained. Surface-mount mounting is reported by one distributor source, while another source lists bulk packaging, so assembly planning should follow the exact manufacturer package drawing and orderable variant.
This part is positioned for cost-sensitive embedded controls requiring a straightforward 8-bit architecture and one-time programmable firmware storage. Its 2.1 MHz clock rating provides a concrete performance reference for control loops, digital I/O sequencing, and compact peripheral integration, although the available verified data does not state RAM capacity, peripheral inventories, ADC resolution, timer counts, or communication blocks.
Typical applications include appliance controllers, simple industrial control modules, instrumentation interfaces, keypad and display control, motor sequencing, and legacy embedded systems. A migration or redesign should not assume compatibility with another MCU family solely because the memory size is similar. Firmware timing, interrupt behavior, port multiplexing, reset circuitry, and electrical limits must be checked against the manufacturer datasheet before substitution.
For PCB integration, verify the 44-pin J-lead PLCC footprint, pin-1 orientation, solder-profile requirements, and available board area. Because OTP devices are programmed only once, firmware validation and production provisioning must occur before the final programming operation. This page combines verified distributor data, package information, practical design guidance, and explicitly identified data gaps for engineering review.
Alternativas directas para MC705C8ACFNER — 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 MC705C8ACFNER (mismo factor de forma y huella) — difiere en Mounting Type, Microcontroller Family, Package, Program Memory Size.
Herramienta de comparación rápida — seleccione piezas alternativas para compararlas lado a lado:
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Solicitar alternativasMC705C8ACFNER Valores máximos y características eléctricas
| Microcontroller Family | HC05 series |
| Processor Architecture | 8-bit HC05 CISC |
| Maximum Clock Speed | 2.1 MHz |
| Program Memory Type | OTP |
| Program Memory Size | 8 KB (8K x 8) |
| Supply Voltage Description | 3.3 V or 5 V |
| Package Type | 44-pin PLCC / 44-LCC (J-Lead) |
| Package Body Size | 16.59 mm x 16.59 mm |
| Rango de temperatura de funcionamiento | -40 °C to +85 °C (TA) |
| Tipo de montaje | Surface Mount |
| Manufacturer | NXP Semiconductors |
| Core Processor | HC05 |
| Manufacturer Category | Microcontrollers |
Guía de configuración de pines de MC705C8ACFNER 16.59 mm x 16.59 mm
Configuración de pines para MC705C8ACFNER (encapsulado 16.59 mm x 16.59 mm). Este CI digital incluye GPIO, interfaces de comunicación (UART, SPI, I2C) y pines de alimentación. Consulte la hoja de datos del fabricante para conocer las funciones alternativas de los pines y las opciones de configuración. Esencial para el diseño de sistemas embebidos y el diseño de PCB.
No hay datos detallados de patillaje disponibles para MC705C8ACFNER.
Consulte la hoja de datos para ver la configuración completa de patillas.
Aplicaciones típicas
MC705C8ACFNER es adecuado para 6 aplicacións: Appliance Control, Simple Industrial Control Module, Keypad and Display Interface, Basic Instrumentation Interface, Legacy Equipment Replacement, Motor Sequencing Controller.
Appliance Control
The MC705C8ACFNER fits compact appliance-control logic where an 8-bit processor manages discrete inputs, outputs, timing, and fixed control functions. Its verified 2.1 MHz HC05 core provides a defined execution-rate reference, while 8 KB of OTP memory is appropriate for stable production firmware. The main design constraint is the one-time-programming requirement: validate timing, state-machine logic, and fault handling before programming. The 44-pin PLCC package may also require careful inspection of an existing through-hole footprint and its assembly process.
Recomendado
Simple Industrial Control Module
The MC705C8ACFNER can serve as the control core for a small automation module when the required functions are limited and the product is programmed once during manufacturing. The verified -40 °C to +85 °C ambient range provides a documented temperature envelope, but industrial qualification is not established by the supplied data. Designers should verify I/O thresholds, reset behavior, watchdog requirements, isolation, and EMC performance. The 44-pin PLCC footprint also makes it suitable mainly for boards designed around the same package and assembly constraints.
Recomendado
Keypad and Display Interface
The MC705C8ACFNER is appropriate for a compact keypad, display, or menu-control subsystem when firmware must combine input scanning with fixed output sequencing. The 8-bit architecture and 2.1 MHz operating speed are useful for straightforward digital state machines, but the verified material does not specify LCD drivers, serial interfaces, GPIO count, or RAM. Those missing details must be checked before claiming direct interface compatibility. OTP storage favors fixed production behavior, while the PLCC package requires a matching mechanical footprint.
Recomendado
Basic Instrumentation Interface
The MC705C8ACFNER can support basic instrumentation front ends that require digital control, status handling, and fixed acquisition sequencing. Its 2.1 MHz core is a useful starting point for low-bandwidth control logic, but the verified sources do not confirm ADC resolution, sensor interfaces, calibration storage, or communication peripherals. Those features must be established from the manufacturer datasheet and firmware requirements. The OTP format is useful for production-stable control code, although field updates would require a different device strategy.
Recomendado
Legacy Equipment Replacement
The MC705C8ACFNER is relevant to maintenance and continuation of legacy equipment where the original PCB uses a 44-pin PLCC footprint and the original firmware behavior is known. Its 8 KB OTP memory can preserve a stable control image, but OTP programming limits revision flexibility. Before installing the part, compare pin functions, supply rails, clock circuitry, port loads, and timing with the installed device. A package match alone is insufficient to establish a safe drop-in replacement.
Recomendado
Motor Sequencing Controller
The MC705C8ACFNER can implement a small motor-sequencing controller when the design uses discrete outputs, simple interlocks, and fixed timing. The 8-bit core and 2.1 MHz clock are sufficient as a documented starting point for state-machine control, but motor-drive protection, current sensing, isolation, and timing tolerances are not specified in the verified results. Use external driver circuitry as required and validate worst-case startup, stall, and fault behavior. The PLCC package must match the mechanical and soldering requirements of the target assembly.
Recomendado
Resumen de productos recomendados
Datos de referencia de ingeniería para MC705C8ACFNER — comparación, orientación de diseño e información de cumplimiento.
Guía de selección
Diferenciadores clave
- Legacy HC05 control architecture in a 44-pin PLCC package (frente a MC68HC705L32FU)
- OTP-based production configuration (frente a MC9S08QG4CDNER)
- Defined 2.1 MHz operating point (frente a MC908AP32CFAER)
Notas de diseño
Treat the 44-pin PLCC footprint as a mechanical and electrical commitment. Before layout, obtain the exact manufacturer land-pattern drawing and verify pin-1 orientation, J-lead geometry, pad dimensions, and solder-process requirements. The verified distributor data identifies a 44-pin PLCC/LCC package and a 16.59 mm x 16.59 mm body, but those summary values alone are not sufficient to generate a production footprint.
Do not substitute an MCU solely by matching the 8-bit core and 8 KB memory size. Firmware compatibility depends on the pinout, memory map, reset behavior, clock configuration, timer resources, interrupt vector table, peripheral registers, and electrical timing. Validate the original schematic and manufacturer datasheet before treating any candidate as a replacement.
Confirm the exact supply and I/O voltage limits from the manufacturer datasheet. The verified results describe the device as 3.3 V or 5 V, but they do not provide separate core, I/O, reset, and absolute-maximum limits. Include appropriate decoupling, validate power-up and reset behavior in the final circuit, and avoid assuming that the package operating-temperature report establishes industrial or automotive compliance.
OTP program memory cannot be erased and rewritten during normal production. Maintain a controlled programming process, version the firmware externally, test identical devices before the final program operation, and provide a recovery plan for incorrect images. This is especially important when the MCU controls safety interlocks, motor sequencing, or equipment that cannot tolerate a failed update.
Información de cumplimiento
The verified search results identify NXP Semiconductors as the manufacturer but do not provide RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals declarations. Compliance must be confirmed from the current manufacturer product documentation.
