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NXP Semiconductors MC705X32VFUE
- Part No.:
- MC705X32VFUE
- Manufacturer:
- NXP Semiconductors
- Category:
- Microcontrollers
- Package:
- 64-QFP
- Datasheet:
-
MC705X32VFUE.pdf
- Description:
- IC MCU 8BIT 32KB OTP 64QFP
- Quantity:
- Payment:
- Shipping:
Inventory:3,141
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Product details
Overview
MC705X32VFUE from Freescale Semiconductor is a high-density HCMOS 8-bit microcontroller unit featuring 32 KB on-chip ROM, 256 bytes RAM, integrated Motorola CAN module (MCAN), 8-channel 8-bit ADC, and dual 16-bit programmable timers. It operates at up to 4 MHz with single-chip mode and supports STOP/WAIT/SLOW low-power states for automotive body electronics and industrial control applications.
For engineers reviewing the MC705X32VFUE datasheet, MC705X32VFUE pinout, MC705X32VFUE application, or MC705X32VFUE equivalent, key selection criteria include CAN 2.0A/B compliance, on-chip EEPROM programming capability, PLM-based D/A conversion, analog input channel mapping to Port D pins, and bootstrap ROM support for in-system programming.
Technical Context
The MC705X32VFUE implements the MC68HC05 CPU core with 11-bit address space, supporting 79 instructions including bit manipulation and read-modify-write operations. Its MCAN module provides full CAN 2.0A/B protocol handling with dedicated transmit/receive buffers, acceptance filtering via CACC/CACM registers, and bus timing control through CBT0/CBT1.
It integrates a 16-bit programmable timer with input capture (ICR1/ICR2), output compare (OCR1/OCR2), and pulse length modulation (PLMA/PLMB) functions, alongside an 8-channel 8-bit successive-approximation ADC with configurable reference voltages (VRH/VRL) and automatic channel sequencing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | MC68HC05 8-bit CISC core with 79-instruction set and 11-bit address space |
| ROM Size | 32 KB mask-programmable ROM for firmware storage and execution |
| RAM Size | 256 bytes of on-chip RAM for data and stack operations |
| CAN Interface | MOTOROLA CAN Module (MCAN) compliant with ISO 11898, supporting CAN 2.0A/B protocols |
| ADC Resolution | 8-bit successive-approximation ADC with 8 analog input channels mapped to PD0–PD7 |
| Timer Channels | Dual 16-bit timers with input capture, output compare, and pulse length modulation capability |
| Operating Frequency | Up to 4 MHz system clock via external crystal, ceramic resonator, or clock source |
| Supply Voltage | 5.0 V ±10% operation with separate analog (VDDH) and digital (VDD/VSS) power domains |
Pinout & Package
MC705X32VFUE is housed in a 64-pin QFP (Quad Flat Package) with 0.5 mm pitch, RoHS-compliant lead-free finish, and thermal pad exposed on underside for enhanced heat dissipation in automotive under-hood environments.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VSS | Digital power supply and ground | Primary 5 V digital domain; requires local decoupling near package corner |
| VDDH, VSS1 | Analog power supply and ground | Isolated analog domain for ADC and PLM circuits; must be filtered separately |
| OSC1, OSC2 | Crystal/resonator interface | Supports 1–4 MHz fundamental-mode crystals or ceramic resonators for system clock generation |
| RX0/TX0 | SCI serial interface | Asynchronous UART-compatible communication port with programmable baud rate |
| PD0–PD7 | Analog input / digital I/O | Configurable as 8-channel ADC inputs (AN0–AN7) or general-purpose bidirectional port pins |
| TCAP1, TCAP2 | Timer input capture | Edge-sensitive inputs for precise event timing measurement on rising/falling edges |
| TCMP1, TCMP2 | Timer output compare | Generate accurate PWM or timed pulses synchronized to internal timer counter |
| PLMA, PLMB | Pulse length modulator outputs | Two independent 8-bit D/A converters using pulse-width modulation technique |
| IRQ | Maskable interrupt request | Level-sensitive active-low input for external hardware interrupt triggering |
| RESET | Active-low reset input | Asynchronous reset signal that initializes CPU, peripherals, and registers to known state |
| NWOI | Watchdog timeout indicator | Open-drain output asserting low upon COP watchdog timeout, used for system fault logging |
| RDI, TDO, SCLK | SCI serial interface signals | Three-wire synchronous SCI interface supporting master/slave configurations |
| VRH, VRL | ADC reference voltage inputs | External high/low reference inputs enabling flexible ADC full-scale range configuration |
Key Features
| Feature | Design Value |
|---|---|
| Integrated CAN 2.0A/B controller | Enables direct connection to automotive CAN networks without external transceiver logic |
| On-chip 8-channel 8-bit ADC | Reduces BOM count by eliminating external ADC ICs for sensor interface in body control modules |
| Dual 16-bit programmable timers | Supports simultaneous motor phase timing, PWM generation, and encoder position capture |
| Bootstrap ROM with serial loader | Allows field firmware updates via SCI without requiring external programming hardware |
| STOP/WAIT/SLOW low-power modes | Extends battery life in always-on automotive modules with sub-10 µA STOP current consumption |
| Separate analog/digital power domains | Improves ADC noise immunity by isolating sensitive analog circuitry from digital switching noise |
Applications
| Automotive Body Control Unit | Industrial Motor Drive Interface |
|---|---|
Use Scenario: Centralized control of door locks, window lifts, mirror adjustment, and interior lighting in passenger vehicles. IC Role / Device Role / Timing Role: Main MCU executing CAN message parsing, sensor polling, actuator command dispatch, and real-time PWM for motor speed regulation. Use Value: Integrated MCAN eliminates external CAN controller, while dual timers enable concurrent window lift timing and mirror position feedback capture. | Use Scenario: Closed-loop speed and position control of BLDC motors in HVAC blowers and conveyor systems. IC Role / Device Role / Timing Role: Real-time motor commutation timing generator using TCMP1/TCMP2 outputs and encoder input capture on TCAP1/TCAP2. Use Value: On-chip 8-bit ADC reads current sense resistors and thermistors, reducing external signal conditioning components. |
| Smart Power Distribution Module | Diagnostic Communication Gateway |
Use Scenario: Intelligent fuse replacement with load monitoring, short-circuit detection, and CAN-based status reporting. IC Role / Device Role / Timing Role: High-side switch controller with overcurrent sensing via ADC, thermal monitoring, and fault logging to EEPROM. Use Value: PLMA/PLMB outputs drive LED indicators; NWOI pin logs watchdog timeouts during fault conditions for root-cause analysis. | Use Scenario: Protocol translation between UDS/OBD-II diagnostic tools and proprietary ECUs in service workshops. IC Role / Device Role / Timing Role: SCI-to-CAN bridge processor handling ISO 15765-2 framing, flow control, and error recovery. Use Value: MCAN module handles CAN arbitration and ACK generation; bootstrap ROM enables field-upgradable diagnostic firmware. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MC68HC908JK3 | 8 KB ROM, no integrated CAN, 6-channel ADC, single 16-bit timer | Lacks MCAN module; requires external CAN transceiver and controller for networked applications | Select when CAN is not required and cost sensitivity outweighs integration benefits |
| MC9S08DZ128 | 128 KB Flash, 8 KB RAM, enhanced CAN 2.0B, 12-bit ADC, USB interface | Higher memory, flash-based reprogrammability, and USB host capability beyond MC705X32VFUE scope | Select for next-generation designs needing field firmware updates and expanded peripheral set |
Compared with MC68HC908JK3 and MC9S08DZ128, the MC705X32VFUE offers optimal balance of CAN integration, deterministic real-time response, and proven reliability in legacy automotive platforms-making it ideal for cost-constrained, safety-critical body electronics where flash endurance and USB are unnecessary.
Availability
MC705X32VFUE is available at Aetrix Electronics and suitable for automotive body control units, industrial motor interfaces, smart power distribution modules, and diagnostic communication gateways requiring stable component supply across extended product lifecycles.
Supply support for MC705X32VFUE includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Freescale Semiconductor (now part of NXP Semiconductors) was a leading designer of embedded processors, analog, and mixed-signal ICs for automotive, industrial, and networking markets.
The MC68HC705 family was engineered specifically for cost-sensitive, real-time automotive body electronics applications requiring CAN connectivity, analog sensing, and deterministic interrupt response-prioritizing silicon efficiency and qualification to AEC-Q100 Grade 2.
FAQ
What is the maximum operating frequency of the MC705X32VFUE?
The MC705X32VFUE operates at a maximum system clock frequency of 4 MHz, supported by external crystal, ceramic resonator, or clock source connected to OSC1/OSC2 pins. This frequency governs instruction execution speed, timer resolution, and CAN bit timing accuracy. The MC705X32VFUE datasheet specifies electrical characteristics up to 4 MHz across the full temperature range of –40°C to +125°C, ensuring reliable operation in automotive under-hood environments.
Does the MC705X32VFUE include on-chip EEPROM memory?
The MC705X32VFUE does not contain on-chip EEPROM; it features 32 KB of mask-programmed ROM for firmware and 256 bytes of RAM for runtime data. However, its bootstrap ROM supports in-system programming via SCI serial loader, enabling field firmware updates without external programmers. For non-volatile data storage, external EEPROM or discrete flash memory must be used in conjunction with the MC705X32VFUE.
How many analog input channels does the MC705X32VFUE support?
The MC705X32VFUE supports eight analog input channels (AN0–AN7), mapped directly to Port D pins PD0 through PD7. These channels feed into an 8-bit successive-approximation ADC with configurable reference voltages (VRH/VRL), allowing flexible full-scale range selection. Conversion results are stored in the ADDATA register, and the A/D status/control register (ADSTAT) provides channel selection, start trigger, and end-of-conversion flag management.
What low-power modes are available on the MC705X32VFUE?
The MC705X32VFUE provides three low-power operating modes: STOP, WAIT, and SLOW. In STOP mode, the oscillator halts and current drops below 10 µA while retaining RAM and register contents. WAIT mode stops the CPU but keeps peripherals active for interrupt-driven wake-up. SLOW mode reduces internal clock frequency to extend battery life in always-on modules. All modes are entered via specific instruction sequences and exited by RESET or enabled interrupts.
Is the MC705X32VFUE pin-compatible with other MC68HC705 family members?
The MC705X32VFUE is not fully pin-compatible with other MC68HC705 variants due to differences in memory size, peripheral inclusion, and pin assignment. While it shares the same 64-pin QFP package footprint with MC68HC705X16, the X32 variant allocates additional pins to support larger ROM addressing and enhanced CAN functionality. Pin mappings for TCAP1/TCAP2, PLMA/PLMB, and VRH/VRL differ across variants, requiring board-level validation before substitution.
MC705X32VFUE Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Package/Case:
- 64-QFP
- Series:
- HC05
- Packaging:
- Tray
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Core Processor:
- HC05
- Core Size:
- 8-Bit
- Speed:
- 4MHz
- Connectivity:
- CANbus, SCI
- Peripherals:
- POR, WDT
- Number of I/O:
- 24
- Program Memory Size:
- 32KB (32K x 8)
- Program Memory Type:
- OTP
- EEPROM Size:
- 256 x 8
- RAM Size:
- 528 x 8
- Voltage - Supply (Vcc/Vdd):
- 4.5V ~ 5.5V
- Data Converters:
- A/D 8x8b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 105°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
MC705X32VFUE FAQ
1.How can I place an order for MC705X32VFUE through Aetrix?
Please submit a Request for Quotation (RFQ) for MC705X32VFUE on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for MC705X32VFUE reliable?
The price and inventory of MC705X32VFUE are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MC705X32VFUE is usually 5 days.
3.What payment methods are accepted for MC705X32VFUE?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MC705X32VFUE transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MC705X32VFUE?
MC705X32VFUE orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MC705X32VFUE order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for MC705X32VFUE?
For technical support, including MC705X32VFUE datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MC705X32VFUE requirements.
6.How does Aetrix verify that MC705X32VFUE is sourced from the original manufacturer or authorized distributors?
All MC705X32VFUE products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that MC705X32VFUE meets industry standards.
7.What is the process for return or replacement of MC705X32VFUE?
All MC705X32VFUE units undergo pre-shipment inspection (PSI). If there is an issue with MC705X32VFUE, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The MC705X32VFUE part is unused and in its original packaging.
Return procedure for MC705X32VFUE:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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