MC68HSC705C8ACFB - 8-Bit 2.1MHz OTP MCU | NXP | 44-QFP
N.º de pieza: MC68HSC705C8ACFB ✗ Fin de vida| Cant. | Precio unitario | Total |
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| 1 | $0 | $0,00 |
| 10 | $0 | $0,00 |
| 100 | $0 | $0,00 |
| 500 | $0 | $0,00 |
| 1.000 | $0 | $0,00 |
MC68HSC705C8ACFB Descripción general
An 8-bit microcontroller is a programmable control component built around a central processing unit, memory, and peripheral interfaces. In the broader semiconductor hierarchy, this device is a microcontroller MCU, a member of the embedded-processing category, and a semiconductor used for control rather than high-throughput computing. The HC05 architecture uses a CISC-oriented instruction set and is suited to compact products requiring deterministic control logic, keypad or switch inputs, sensor conditioning, actuator outputs, and simple serial communication.
The MC68HSC705C8ACFB provides 8 KB of 8K x 8 OTPROM according to the verified distributor listing, while the technical datasheet describes eight kilobytes of addressable memory and programmable read-only memory. Its 2.1 MHz operating frequency provides the core execution clock, and the stated 3.3 V/5 V supply capability allows use in conventional low-voltage embedded systems. The package is identified as a 44-QFP with a 10 mm x 10 mm body.
This part is associated with industrial-temperature marking in a distributor result and is listed under the HC05 microcontroller category. Exact operating-temperature limits, input thresholds, timer specifications, port current ratings, oscillator details, programming method, and absolute maximum ratings are not included in the supplied verified snippets, so those values remain marked as needed rather than being inferred. Confirm them against the manufacturer datasheet before release to production.
Typical applications include industrial control panels, appliance controllers, small motor or relay systems, sensor-interface equipment, and legacy HC05-compatible products. The same package and memory architecture are useful when maintaining an existing MC68HC05 design, but software timing, programming requirements, and peripheral behavior must be checked when changing between related C8A variants.
For PCB design, preserve the 44-pin QFP land pattern, verify pin functions in the authoritative datasheet, and confirm programming, oscillator, reset, and decoupling requirements before manufacturing. This page combines verified distributor specifications, official or manufacturer-linked datasheet references, and application guidance intended to make legacy MCU sourcing more transparent.
Alternativas directas para MC68HSC705C8ACFB — 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 MC68HSC705C8ACFB (mismo factor de forma y huella) — difiere en Mounting Type, Package, Architecture, Microcontroller Type, Peripherals.
Herramienta de comparación rápida — seleccione piezas alternativas para compararlas lado a lado:
MC68HC705C8ACFB
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SC705C8AE0VFBE
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Ver hoja de datos →MC68HSC705C8ACFB Valores máximos y características eléctricas
| Architecture | 8-bit HC05 CISC |
| Frecuencia de reloj máxima | 2.1 MHz |
| Program Memory | 8 KB OTPROM (8K x 8) |
| Tensión de alimentación | 3.3 V/5 V |
| Microcontroller Type | 8-bit MCU |
| CPU Core | HC05 CISC core |
| Addressable Memory | 8 Kbytes |
| Program Memory Type | One-time programmable read-only memory (OTPROM) |
| Encapsulado | 44-pin QFP (10 mm x 10 mm) |
| Package Family | QFP |
| Terminal Form | Gull wing |
| Number of Terminals | 44 |
| Tipo de montaje | Surface mount |
| Temperature Grade | Industrial |
| Datasheet Page Count | 222 pages |
| Manufacturer History | Motorola, Inc. / Freescale Semiconductor, Inc. / NXP Semiconductors |
Guía de configuración de pines de MC68HSC705C8ACFB qfp
Configuración de pines para MC68HSC705C8ACFB (encapsulado qfp). 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 MC68HSC705C8ACFB.
Consulte la hoja de datos para ver la configuración completa de patillas.
Aplicaciones típicas
MC68HSC705C8ACFB es adecuado para 6 aplicacións: Industrial Control Panels, Appliance Controllers, Sensor Interface Equipment, Small Motor and Relay Systems, Legacy HC05 Product Maintenance, Embedded Keypad and Human-Interface Products.
Industrial Control Panels
The MC68HSC705C8ACFB fits legacy industrial control-panel designs that use an 8-bit HC05 controller for switch scanning, relay sequencing, status indication, and operator input. Its verified 2.1 MHz operating frequency and 8 KB OTPROM provide a defined execution and firmware-storage baseline, while the 44-QFP package supports compact controller boards. The industrial temperature-grade listing makes it a reasonable candidate for controlled indoor equipment. Before release, verify the complete pinout, I/O current limits, timing, and operating-temperature limits from the datasheet, and qualify any relay or motor interface for its own surge and isolation requirements.
Recomendado
Appliance Controllers
The MC68HSC705C8ACFB is suitable for appliance-control boards requiring deterministic state-machine control of motors, heaters, displays, and user inputs. The HC05 CISC architecture and 8 KB OTPROM support compact embedded firmware, while the verified 3.3 V/5 V supply classification is relevant to common appliance electronics. Use it primarily for products whose existing design already depends on HC05 timing and memory organization. Validate reset behavior, watchdog or timer resources, output drive, and programming requirements against the exact datasheet because those details are not present in the supplied search snippets.
Recomendado
Sensor Interface Equipment
The MC68HSC705C8ACFB can serve as the controller for low- to moderate-complexity sensor-interface equipment, including discrete sensor inputs, threshold logic, alarms, and actuator signaling. Its verified 8 KB OTPROM provides a defined program-memory budget for embedded control code, and its 2.1 MHz clock supports straightforward polling and state-machine designs. The choice is strongest when existing HC05 code and the 44-QFP footprint already exist. Confirm analog-adjacent circuitry, ADC resources, input thresholds, port loading, and grounding separately; the supplied verified data does not specify the complete peripheral set.
Recomendado
Small Motor and Relay Systems
The MC68HSC705C8ACFB can control relays, solenoids, indicators, and small motor-drive logic in legacy embedded systems. The MCU should provide sequencing and protection decisions while external transistors, drivers, flyback paths, and isolation networks handle the switched load. The 2.1 MHz operating frequency is sufficient for many control loops, and the 8 KB OTPROM allows compact firmware when the application does not require complex protocol stacks. Do not infer output-current suitability from the MCU frequency or memory; verify each port's drive limits and use appropriately rated external power devices.
Recomendado
Legacy HC05 Product Maintenance
The MC68HSC705C8ACFB is particularly relevant to maintenance and continuation programs for products already built around the MC68HC05 family. Maintaining the HC05 instruction set, 2.1 MHz timing, 8 KB OTPROM, and 44-QFP footprint can reduce software and PCB migration risk compared with changing to a newer MCU architecture. The supplied NXP application note identifies the 68HC705C8A as an enhanced drop-in replacement for the 705C8, but calls out port C7 drive, MOR programming, SPI, manufacturing, and boot-ROM differences. Therefore, use the note for screening and the complete datasheet for final qualification.
Recomendado
Embedded Keypad and Human-Interface Products
The MC68HSC705C8ACFB can support keypad scanning, menu logic, indicator control, and simple embedded user interfaces. Its verified 8 KB OTPROM is suitable for compact state-machine firmware, and the 2.1 MHz HC05 core provides deterministic execution for debouncing and display sequencing. The 44-QFP package allows a conventional surface-mount controller footprint with external drivers where required. Before schematic release, confirm port direction, multiplexed functions, pull-up requirements, and timing from the full pinout and electrical tables, because these details are not included in the verified snippets.
Recomendado
Resumen de productos recomendados
Datos de referencia de ingeniería para MC68HSC705C8ACFB — comparación, orientación de diseño e información de cumplimiento.
Guía de selección
Comparación con alternativas
| Parámetro | Este producto | MC68HC705C8ACFB | MC68HC705C8A | MC68HSC705C8A | SC705C8AE0VFBE | SC705C8AE0VFNE |
|---|---|---|---|---|---|---|
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | Freescale Semiconductor | Freescale Semiconductor |
| Replacement Status | Target legacy MCU | Same source-listed device class | Enhanced drop-in replacement for 705C8, with documented differences | Family alternative requiring suffix verification | Legacy family candidate requiring verification | Legacy family candidate requiring verification |
Diferenciadores clave
- Directly identified legacy HC05 source configuration (frente a MC68HC705C8A)
- Enhanced 705C8 replacement path with documented caveats (frente a MC68HC705C8ACFB)
- Package continuity for legacy PCB maintenance (frente a SC705C8AE0VFBE)
Notas de diseño
Use the manufacturer’s exact 44-QFP land pattern rather than relying only on the generic QFP label. Confirm pin-1 orientation, pin numbering, lead pitch, courtyard, solder-mask clearance, and whether the package has an exposed thermal pad. The verified data confirms a 44-QFP 10 mm x 10 mm package, but it does not provide the complete footprint drawing or pinout, so both must be checked before PCB release.
The verified product data identifies 3.3 V/5 V operation, but it does not provide the complete minimum and maximum supply limits or current budget. Follow the manufacturer’s recommended decoupling and power-entry layout, verify ground continuity, and calculate the worst-case supply current including I/O loads and external circuitry. Do not treat the supply-class label as permission to exceed the datasheet’s absolute maximum ratings.
Reserve the oscillator, reset, and programming connections according to the authoritative datasheet. Keep sensitive signal routing away from switching nodes and high-current actuator paths, and provide a clean return path for digital ground. Because the supplied snippets do not identify all 44 pins, the layout cannot be approved from the package description alone; cross-check oscillator, reset, programming, and port multiplexing signals before routing.
Do not select a replacement solely because the part is called a 705C8 or uses a QFP package. The supplied NXP application note identifies differences involving port C7 drive, MOR programming, SPI behavior, manufacturing geometry, and boot ROM code. Treat legacy MC68HC05 firmware as part of the qualification: compare startup vectors, timing assumptions, programming flow, interrupt behavior, and any peripheral register differences before substitution.
The verified data identifies an industrial temperature grade but does not provide thermal resistance, maximum power dissipation, or ambient-temperature limits. Estimate junction temperature from actual supply voltage, current, and package thermal resistance only after those values are obtained from the datasheet. For legacy production designs, verify solder-joint reliability and board thermal performance across the intended temperature range rather than relying on the industrial-grade label alone.
Información de cumplimiento
The supplied verified data identifies an industrial temperature grade and legacy MC68HC05 family documentation, but it does not provide explicit RoHS, REACH, lead-free, halogen-free, conflict-minerals, or automotive qualification statements.
