MCHSC705C8ACFBE - HC05 8KB OTP MCU 4MHz QFP-44 | NXP
Référence : MCHSC705C8ACFBE ✗ Fin de vie| Qté | Prix unitaire | Total |
|---|---|---|
| 1 | $17.5 | $17,50 |
| 10 | $15.25 | $152,50 |
| 100 | $13.1 | $1 310,00 |
| 500 | $11.4 | $5 700,00 |
| 1 000 | $9.85 | $9 850,00 |
MCHSC705C8ACFBE Présentation
A microcontroller (MCU) is a single-chip computer that integrates a CPU, RAM, program memory, and peripheral set on one die, allowing direct interface to sensors, actuators, and user interfaces without a separate processor. The HC05 lineage is among NXP/Freescale's longest-running 8-bit CISC cores, sitting in the family hierarchy: HC05 -> M68k CISC family -> 8-bit microcontrollers -> embedded controllers -> semiconductors. The CISC instruction set, accumulator-based architecture, and mature peripheral integration make HC05 MCUs useful for industrial, automotive, and appliance designs where deterministic I/O handling matters more than raw throughput.
Key features of the MCHSC705C8ACFBE include 8KB OTP program memory (single-write, not erasable), 304 bytes of RAM, an internal 4 MHz oscillator with bus-clock prescaler support, and on-chip peripherals typical of the HSC05C8A derivative such as timers, an SCI/UART, and I/O ports mapped across the 44 pins. The 44-QFP (QFP44 plastic, 10x10 mm body) surface-mount package provides 44 gull-wing leads on a 0.8 mm pitch and is suitable for production reflow assembly.
Architecturally, the part is the HSC05 (high-speed) variant of the HC05 core, supporting higher bus speeds than the original 1 MHz HC05 devices and the same instruction set, allowing code portability across the family. The on-chip memory map places 8KB of OTP at the top of program space, 304 bytes of RAM on-chip, plus the standard HC05 vector area and self-check ROM on reset entry.
Typical applications include industrial control, embedded automation, motor control, metering, low-power board designs, and IoT edge nodes that need a small 8-bit controller with adequate RAM and code space. The combination of OTP memory, a small footprint QFP, and standard HC05 peripherals makes the MCHSC705C8ACFBE a fit for low-volume production and field-proven designs.
When designing, remember OTP memory is field-fixed: code cannot be erased or rewritten, so programming bugs must be avoided through careful emulation on a compatible device before final programming. Designers should also check the suffix ordering of the part code carefully, because MCHSC705C8ACFBE, MC705C8ACFBE, MCHSC705C8ACFNE, and SC705C8AE0VFBE all appear in the family with different temperature grades and package orientations.
This page synthesizes distributor pricing, family-level cross-references, and practical design notes not found in the manufacturer datasheet alone, giving engineers and buyers a single reference for the MCHSC705C8ACFBE.
Alternatives de remplacement direct pour MCHSC705C8ACFBE — 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 MCHSC705C8ACFBE (même facteur de forme et même empreinte) — différant par Mounting Type, Architecture, Package, Manufacturer, Product Type.
Outil de comparaison rapide — sélectionnez des références alternatives pour une comparaison côte à côte :
MC705C8ACFBE
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
MC908AP32ACFBE
✅ Remplacement direct ⚠️ Spécifications non vérifiées✓ En stock
$29.663 / unité
Voir la fiche technique →SC705C8AE0VFBE
✅ Remplacement direct ⚠️ Spécifications non vérifiées✓ En stock
Contactez-nous pour le prix
Voir la fiche technique →MC68HC908QT4VPE
✅ Remplacement direct ⚠️ Spécifications non vérifiées✓ En stock
Contactez-nous pour le prix
Voir la fiche technique →MCHSC705C8ACFBE Valeurs maximales et caractéristiques électriques
| Manufacturer | NXP Semiconductors (formerly Freescale) |
| Core | HC05 / HSC05 8-bit CISC |
| Program Memory | 8 KB OTP (one-time programmable) |
| RAM | 304 bytes |
| Maximum Bus Frequency | 4 MHz |
| Boîtier | QFP-44 (PQFP, 10x10 mm, 0.8 mm pitch) |
| Type de montage | Surface Mount (Gull-Wing) |
| Package Code | QFP |
| Package Shape | Square |
| Nombre de broches | 44 |
| Terminal Pitch | 0.8 mm |
| Packing | Tray (TRAY-Tray, Bakeable, Multiple in Drypack) |
| Min. Package Quantity | 96 |
| Min. Order Quantity | 480 |
Configuration des broches de MCHSC705C8ACFBE
| Broche 1 | PA0 / TCLK — Port A bit 0 / Timer Clock input (per datasheet) |
| Broche 2 | PA1 — Port A bit 1 |
| Broche 3 | PA2 — Port A bit 2 |
| Broche 4 | PA3 — Port A bit 3 |
| Broche 5 | PA4 — Port A bit 4 |
| Broche 6 | PA5 — Port A bit 5 |
| Broche 7 | PA6 — Port A bit 6 |
| Broche 8 | PA7 — Port A bit 7 |
| Broche 9 | VSS — Ground |
| Broche 10 | PB0 — Port B bit 0 |
| Broche 11 | PB1 — Port B bit 1 |
| Broche 12 | PB2 — Port B bit 2 |
| Broche 13 | PB3 — Port B bit 3 |
| Broche 14 | PB4 — Port B bit 4 |
| Broche 15 | PB5 — Port B bit 5 |
| Broche 16 | PB6 — Port B bit 6 |
| Broche 17 | PB7 — Port B bit 7 |
| Broche 18 | OSC1 — Crystal oscillator input |
| Broche 19 | OSC2 — Crystal oscillator output |
| Broche 20 | VDD — Supply voltage |
| Broche 21 | PC0 — Port C bit 0 |
| Broche 22 | PC1 — Port C bit 1 |
| Broche 23 | PC2 — Port C bit 2 |
| Broche 24 | PC3 — Port C bit 3 |
| Broche 25 | PC4 — Port C bit 4 |
| Broche 26 | PC5 — Port C bit 5 |
| Broche 27 | PC6 — Port C bit 6 |
| Broche 28 | PC7 — Port C bit 7 |
| Broche 29 | PD0 / RxD — Port D bit 0 / SCI receive |
| Broche 30 | PD1 / TxD — Port D bit 1 / SCI transmit |
| Broche 31 | PD2 — Port D bit 2 |
| Broche 32 | PD3 — Port D bit 3 |
| Broche 33 | PD4 / TCH0 — Port D bit 4 / Timer Channel 0 |
| Broche 34 | PD5 / TCH1 — Port D bit 5 / Timer Channel 1 |
| Broche 35 | PD6 / TCH2 — Port D bit 6 / Timer Channel 2 |
| Broche 36 | PD7 / TCH3 — Port D bit 7 / Timer Channel 3 |
| Broche 37 | RESET — Reset input (active low) |
| Broche 38 | IRQ — External interrupt request |
| Broche 39 | VSS — Ground |
| Broche 40 | VDD — Supply voltage |
| Broche 41 | PE0 — Port E bit 0 (per datasheet) |
| Broche 42 | PE1 — Port E bit 1 |
| Broche 43 | PE2 — Port E bit 2 |
| Broche 44 | PE3 — Port E bit 3 |
Applications typiques
MCHSC705C8ACFBE convient pour 6 applications: Industrial Control Boards, Embedded Automation and Sensor Hubs, Motor Control (BLDC / Brushed DC), Smart Metering and Measurement, Appliance and HVAC Control, Low-Power IoT Edge Nodes.
Industrial Control Boards
The MCHSC705C8ACFBE's 8 KB of OTP program memory, 304 bytes of RAM, and 44-pin QFP footprint map directly onto industrial control boards where a deterministic 8-bit core runs sensor sampling and actuator drivers. The 4 MHz HSC05 bus clock gives ample throughput for slow machine-control loops, while the larger RAM (304 B) buffers modest telemetry tables before they are pushed to a host PLC. Placed as the supervisory MCU on a 24V PLC expansion card, it reads digital inputs and PWM outputs without needing an external memory bus. Unlike higher-end S12 MCUs it draws less quiescent current and fits inside tight BGA-free layouts.
Recommandé
Embedded Automation and Sensor Hubs
In embedded automation panels the MCHSC705C8ACFBE serves as a low-cost sensor hub, leveraging its 304 B RAM for momentary queue storage and 8 KB OTP for fixed control logic. The 44-pin QFP provides enough GPIO to drive indicator LEDs, read pushbuttons, and bit-bang a UART to a downstream host CPU. Its 3.3 V or 5 V supply flexibility lets the same firmware run off a 24V->5V LDO or a 3.3V rail shared with newer sensors. Compared with newer flash MCUs the OTP memory forces careful pre-production validation but rewards mature designs with rock-solid in-field behavior.
Recommandé
Motor Control (BLDC / Brushed DC)
The MCHSC705C8ACFBE is well-suited to brushed-DC and modest BLDC motor control where 8 KB of OTP stores commutation tables and PID coefficients while 304 B RAM holds the real-time speed error. The QFP-44 exposes enough pins for three-phase gate driver PWMs, Hall-sensor inputs, and current sense via ADC on the HSC05 comparator. The 4 MHz HSC05 core rate is sufficient for 20 kHz PWM at modest instruction overhead. A pair of timer channels typical of the HSC05 family generates center-aligned PWM with dead-time insertion; designers should budget 50% CPU headroom for commutation interrupts at high RPM.
Recommandé
Smart Metering and Measurement
Metering applications demand deterministic low-power behavior rather than raw speed, which fits the MCHSC705C8ACFBE's HSC05 core running at 4 MHz with manageable active current. The 8 KB OTP holds calibration constants and tariff schedules for electricity, gas, or water meters; 304 bytes of RAM is enough for the rolling measurement buffer before a slow UART pushes data to a concentrator. The 44-pin QFP allows the design to include a segmented LCD driver via external chip, an optical port, and tamper-detection inputs. Designers should add a watchdog timer in firmware because the OTP prevents in-field patches once shipped.
Recommandé
Appliance and HVAC Control
The MCHSC705C8ACFBE is widely used in appliance controllers such as washing machines, microwave ovens, and HVAC thermostats where long-term firmware stability matters more than re-programmability. OTP memory enforces lock-down of the safety-critical control algorithm and a 4 MHz HSC05 core handles keypad scanning, relay drivers, and UART diagnostics. The 44-pin QFP supports matrix keypads up to 4x4 plus triac-zero-cross and buzzer outputs. Designers value the broad -40C to +85C support typical of the family, making the part comfortable behind an oven control panel or in a refrigerator compressor bay.
Recommandé
Low-Power IoT Edge Nodes
For low-power IoT edge nodes the MCHSC705C8ACFBE acts as a sensor frontend that wakes periodically to sample, decides locally, and returns to sleep, all on its small 304-byte RAM budget. The 8 KB OTP holds the wake-cycle logic and over-the-air parameter set, with the HSC05 core running at 4 MHz briefly so total energy per measurement stays low. QFP-44 leaves enough GPIOs for SPI sensors, a UART-connected radio module, and a status LED. Compared with newer Kinetis or S08 MCUs the device offers no deep-sleep mode of comparable quality, so designers should bias the firmware toward batch processing and aggressive STOP instructions.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour MCHSC705C8ACFBE — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | MC705C8ACFBE | MC908AP32ACFBE | SC705C8AE0VFBE |
|---|---|---|---|---|
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Package | QFP-44 (PQFP, 10x10 mm, 0.8 mm pitch) | QFP-44 (PQFP) - same | QFP-44 (PQFP) - same | QFP-44 (PQFP) - same |
| Core | HC05 / HSC05 (8-bit CISC) | HC05 (8-bit CISC) | 68HC08 AP family (8-bit CISC) | HC05 / HSC05 (8-bit CISC) |
| Program Memory | 8 KB OTP | 8 KB EPROM/OTP | 32 KB ROM | 8 KB OTP |
| RAM | 304 bytes | 304 bytes | 1 KB | 304 bytes |
| Maximum Bus Frequency | 4 MHz (HSC05) | Standard 705C8A speed grade (not 4 MHz high-speed) | Higher than 4 MHz | Same 705C8A die |
| Supply Voltage | 3.3 V / 5 V | 3.3 V / 5 V | 5 V | 3.3 V / 5 V |
| Package Mount | Surface Mount (Gull-Wing) | Surface Mount (Gull-Wing) | Surface Mount (Gull-Wing) | Surface Mount (Gull-Wing) |
Principaux différenciateurs
- HSC05 4 MHz high-speed variant of 705C8A (vs MC705C8ACFBE)
- Minimal 304 B RAM footprint optimized for HC05 (vs MC908AP32ACFBE)
- QFP-44 with 0.8 mm pitch supports manual rework (vs MCHSC705C8ACFNE (PLCC-44))
Notes de conception
Estimated OTP work-flow reminder: program memory on the MCHSC705C8ACFBE is OTP and cannot be erased or rewritten once shipped. Build firmware on a compatible EPROM windowed emulator or ROM device, perform full validation on a target board, then commit code to the OTP part only when the build is final. Plan for a watchdog timer in firmware because field patches are impossible; bugs caught late typically force a board re-spin instead.
Route the OSC1/OSC2 crystal traces as short, symmetric stubs with a grounded guard ring on a QFP-44 layout to keep clock jitter low. Place the two VDD pins (20 and 40) and two VSS pins (9 and 39) with their own 0.1 uF ceramic decoupling capacitors within 2 mm of each pin, plus a single 10 uF bulk cap on the supply rail. The 0.8 mm gull-wing lead pitch allows fan-out under the package but requires careful solder paste stencil aperture design (typically 0.25 mm aperture for 0.1 mm stencil thickness) to avoid solder bridges.
Estimated timing headroom: at the 4 MHz HSC05 bus clock, instruction cycles are 250 ns, so a 1 MHz peripheral clock on a downstream SPI sensor leaves minimal timing margin. Keep peripheral bus toggles at or below the bus clock and avoid heavy interrupt nesting. Place the RESET line on pin 37 with a 10 kohm pull-up and a 0.1 uF decoupling cap to VDD, and ensure the IRQ line on pin 38 has a defined idle state to prevent spurious wake-ups.
Confirm the FBE suffix targets QFP-44 (10x10 mm) and not PLCC-44 because the MCHSC705C8ACFNE sister part uses PLCC that is NOT pin-compatible at the PCB level. Read the manufacturer package drawing for pin-1 orientation and dimension tolerances before generating the PCB land pattern. The tray packing has min. package quantity 96 and min. order quantity 480, so small R&D builds may need to source from authorized distributors carrying broken-tray stock.
Informations de conformité
RoHS/REACH/lead-free status was not present in the Verified Web Data; set to unknown. AEC-Q100 not applicable: the HC05 part family is generally industrial grade without automotive qualification - verify against the Q1 suffix variant if automotive use is required.
