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NXP Semiconductors MC68HC711D3CFNE3
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- Part No.:
- MC68HC711D3CFNE3
- Manufacturer:
- NXP Semiconductors
- Category:
- Microcontrollers
- Package:
- 44-LCC (J-Lead)
- Datasheet:
-
MC68HC711D3CFNE3.pdf
- Description:
- IC MCU 8BIT 4KB OTP 44PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:4,486
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Product details
Overview
MC68HC711D3CFNE3 from NXP (formerly Freescale) is a HCMOS 8-bit microcontroller with 4 KB OTPROM, 192 bytes static RAM, and a 16-bit programmable timer system. It operates at up to 3 MHz bus speed, supports single-chip and expanded multiplexed modes, and integrates SCI, SPI, pulse accumulator, COP watchdog, and RTI - used in legacy industrial control and automotive subsystems requiring deterministic real-time response.
For engineers reviewing the MC68HC711D3CFNE3 datasheet, MC68HC711D3CFNE3 pinout, MC68HC711D3CFNE3 application, or MC68HC711D3CFNE3 equivalent, key selection factors include OTPROM programmability, 40-pin DIP package compatibility, -40°C to +85°C industrial temperature range, and support for legacy HC11 instruction set and memory-mapped I/O architecture.
Technical Context
The MC68HC711D3CFNE3 implements the MC68HC11 CPU core with full backward compatibility to the MC6805 and MC6801 families. Its memory map includes 64 KB address space, with on-chip 4 KB OTPROM mapped to $E000–$EFFF and 192-byte RAM at $0080–$00FF, all retained in STOP/WAIT low-power modes.
Peripheral integration includes a 16-bit timer with four input capture/compare channels, NRZ-format SCI supporting wakeup via idle-line or address-mark detection, and SPI master/slave operation with configurable clock polarity and phase. The COP watchdog and RTI circuit provide fail-safe timing supervision independent of main program flow.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | MC68HC11 8-bit CISC CPU with 16-bit address bus and 8-bit data bus |
| Memory | 4 KB one-time programmable ROM (OTPROM), 192 bytes static RAM, 64 KB addressable space |
| Max Bus Speed | 3 MHz - defines maximum instruction execution rate and peripheral timing margins |
| Operating Temperature | -40°C to +85°C - validated for industrial environments without derating |
| Supply Voltage | 5.0 V ±10% - requires stable regulated 5 V supply; no internal voltage regulation |
| Low-Power Modes | STOP and WAIT modes - halt CPU clock while preserving RAM and register state |
| Peripherals | SCI (asynchronous serial), SPI (synchronous serial), 16-bit timer with IC/OC, pulse accumulator, COP, RTI |
Pinout & Package
MC68HC711D3CFNE3 is packaged in a 40-pin plastic dual in-line package (PDIP), Case 711-03, with 0.6-inch body width and 0.1-inch lead pitch. Pin assignments follow standard HC11 DIP layout with multiplexed address/data bus on Port D and dedicated control signals including RESET, IRQ, XIRQ/VPP, E-clock, XTAL/EXTAL, R/W, and AS.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| PA0–PA7 | Port A bidirectional I/O | General-purpose parallel I/O with internal pull-ups; PA0–PA3 also serve as timer input capture inputs (IC1–IC4) |
| PB0–PB7 | Port B bidirectional I/O | General-purpose I/O; PB0–PB1 double as SCI transmit/receive lines (TXD/RXD) |
| PC0–PC7 | Port C bidirectional I/O | General-purpose I/O; PC0–PC1 double as SPI MOSI/MISO; PC2 = SCK; PC3 = SS |
| PD0–PD7 | Multiplexed address/data bus | Lower 8 bits of address (A0–A7) and data (D0–D7); PD6 = Address Strobe (AS), PD7 = Read/Write (R/W) |
| RESET | Active-low reset input | Asynchronous reset that initializes CPU registers, disables peripherals, and forces boot mode |
| IRQ | Maskable interrupt request | Level-sensitive input triggering lowest-priority hardware interrupt; edge-triggered option via configuration |
| XIRQ/VPP | Non-maskable interrupt / programming voltage | High-priority NMI input; during OTPROM programming, accepts 12.5 V VPP for write enable |
| XTAL / EXTAL | Crystal oscillator inputs | Drive external 3.2768 kHz to 4 MHz crystal or connect to external clock source on EXTAL |
| E | External clock output | Provides synchronized 1/2 or 1/4 bus clock for external logic synchronization and timing reference |
Key Features
| Feature | Design Value |
|---|---|
| 4 KB OTPROM | Field-programmable nonvolatile storage for firmware; eliminates need for external EPROM and UV eraser |
| 192-byte static RAM | Fully retained during STOP/WAIT modes - enables ultra-low-power wake-on-event operation |
| 16-bit timer with 4 IC/OC channels | Supports precise pulse-width measurement, frequency generation, and quadrature decoding without CPU overhead |
| SCI with wakeup capability | Reduces system power by enabling deep sleep until valid serial frame arrives - critical for battery-backed nodes |
| COP watchdog timer | Hardware-enforced timeout resets CPU if software hangs - mandatory for safety-critical industrial firmware |
| Single-chip and expanded modes | Enables migration from simple embedded control to systems requiring external memory or peripherals via multiplexed bus |
Applications
| Industrial Motor Control | Automotive Body Controller |
|---|---|
Use Scenario: Closed-loop DC motor speed regulation using PWM output and tachometer feedback. IC Role / Device Role / Timing Role: MCU executes PID loop, generates OC-driven PWM, captures tach pulses via IC pins, and communicates status over SCI. Use Value: On-chip timer IC/OC and 192-byte RAM allow deterministic 1 ms control loop with zero external timing components. |
Use Scenario: Centralized door lock, window lift, and mirror control in entry-level vehicles. IC Role / Device Role / Timing Role: Manages discrete I/O, debounces switches, drives relays/LEDs, and exchanges commands with main ECU via SCI. Use Value: OTPROM ensures firmware immutability post-assembly; COP watchdog prevents latch-up in harsh electrical environments. |
| Legacy HVAC Controller | Test Equipment Firmware Loader |
Use Scenario: Temperature monitoring and fan speed modulation in commercial air handlers. IC Role / Device Role / Timing Role: Reads thermistor ADC (via external converter), controls fan via PWM, logs events to EEPROM, and reports via RS-232 (SCI). Use Value: 3 MHz bus speed and integrated SCI reduce BOM cost vs. adding UART bridge IC; 40-pin DIP simplifies through-hole prototyping. |
Use Scenario: In-system programming interface for field-upgradable modules using serial bootloader. IC Role / Device Role / Timing Role: Host processor receives firmware image over SCI, validates checksum, and writes to OTPROM using XIRQ/VPP high-voltage sequence. Use Value: Dedicated VPP pin and OTPROM architecture eliminate need for external programmer hardware - enables factory or depot reprogramming. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MC68HC11D3CP | ROM-based (not OTPROM); identical pinout, timing, and peripheral set; requires mask ROM fabrication | Fixed firmware only - unsuitable for prototyping or low-volume customization | Select when firmware is finalized and volume justifies mask ROM NRE cost |
| MC912B32CPV | Enhanced HC12 core; 32 KB FLASH, 2 KB RAM, higher 8 MHz bus speed; different pinout and memory map | Requires PCB redesign and firmware porting; supports CAN 2.0B and enhanced debug features | Select for new designs needing FLASH reprogrammability, CAN, or higher performance - not drop-in compatible |
Compared with MC68HC11D3CP and MC912B32CPV, the MC68HC711D3CFNE3 uniquely balances field-programmable OTPROM, 40-pin DIP compatibility, and proven industrial temperature reliability - making it the only choice for maintaining legacy systems where firmware updates are infrequent but essential.
Availability
MC68HC711D3CFNE3 is available at Aetrix Electronics and suitable for industrial motor control, automotive body electronics, legacy HVAC systems, and test equipment firmware loaders requiring stable component supply across extended product lifecycles.
Supply support for MC68HC711D3CFNE3 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
NXP Semiconductors (formerly Freescale Semiconductor) is a global semiconductor leader focused on secure connectivity solutions for automotive, industrial, and IoT markets.
The MC68HC711D3CFNE3 belongs to the HC11 microcontroller family, designed for cost-sensitive, real-time embedded control applications demanding high reliability, low power, and long-term availability in industrial and automotive environments.
FAQ
What is the programming voltage required for OTPROM on the MC68HC711D3CFNE3?
The MC68HC711D3CFNE3 requires 12.5 V applied to the XIRQ/VPP pin during OTPROM programming cycles. This high-voltage signal enables the internal charge pump for oxide breakdown and bit programming. Standard 5 V operation resumes immediately after programming completes. Always verify voltage tolerance and timing per Section 2.4 of the Rev. 2.1 datasheet before initiating write sequences.
Does the MC68HC711D3CFNE3 support in-circuit debugging?
The MC68HC711D3CFNE3 does not include on-chip debug interfaces like BDM or JTAG. Debugging relies on external tools such as logic analyzers monitoring E-clock and bus signals, or using the onboard COP and RTI to validate timing behavior. The absence of dedicated debug hardware means firmware validation must occur pre-deployment or via SCI-based diagnostic messaging implemented in user code.
Can the MC68HC711D3CFNE3 operate from a 3.3 V supply?
No. The MC68HC711D3CFNE3 is specified only for 5.0 V ±10% operation (4.5 V to 5.5 V). It lacks internal level-shifting or voltage regulation and will not function reliably below 4.5 V. For 3.3 V systems, external level translators are required on all I/O and bus lines, and the oscillator must be driven with a 5 V-compatible clock source.
What is the function of the MODA and MODB pins on the MC68HC711D3CFNE3?
MODA/LIR and MODB/VSTBY are mode-select inputs that configure the MC68HC711D3CFNE3's operating mode at reset: MODA=low/MODB=low selects Single-Chip Mode; MODA=high/MODB=low selects Expanded Multiplexed Mode; MODA=low/MODB=high enters Special Bootstrap Mode for PROM programming. These pins must be hardwired or pulled via resistors - they are sampled only during reset assertion.
Is the MC68HC711D3CFNE3 pin-compatible with the MC68HC11E9?
No. While the MC68HC711D3CFNE3 shares the same HC11 instruction set and peripheral architecture as the MC68HC11E9, it uses a 40-pin DIP package versus the E9's 52-pin PLCC. Pin functions differ significantly - especially for address/data bus mapping and interrupt routing - and memory maps are not identical. Direct replacement requires PCB redesign and firmware adaptation.
MC68HC711D3CFNE3 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Package/Case:
- 44-LCC (J-Lead)
- Series:
- HC11
- Packaging:
- Tube
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Core Processor:
- HC11
- Core Size:
- 8-Bit
- Speed:
- 3MHz
- Connectivity:
- SCI, SPI
- Peripherals:
- POR, WDT
- Number of I/O:
- 26
- Program Memory Size:
- 4KB (4K x 8)
- Program Memory Type:
- OTP
- EEPROM Size:
- -
- RAM Size:
- 192 x 8
- Voltage - Supply (Vcc/Vdd):
- 4.5V ~ 5.5V
- Data Converters:
- -
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
MC68HC711D3CFNE3 FAQ
1.How can I place an order for MC68HC711D3CFNE3 through Aetrix?
Please submit a Request for Quotation (RFQ) for MC68HC711D3CFNE3 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 MC68HC711D3CFNE3 reliable?
The price and inventory of MC68HC711D3CFNE3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MC68HC711D3CFNE3 is usually 5 days.
3.What payment methods are accepted for MC68HC711D3CFNE3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MC68HC711D3CFNE3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MC68HC711D3CFNE3?
MC68HC711D3CFNE3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MC68HC711D3CFNE3 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 MC68HC711D3CFNE3?
For technical support, including MC68HC711D3CFNE3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MC68HC711D3CFNE3 requirements.
6.How does Aetrix verify that MC68HC711D3CFNE3 is sourced from the original manufacturer or authorized distributors?
All MC68HC711D3CFNE3 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 MC68HC711D3CFNE3 meets industry standards.
7.What is the process for return or replacement of MC68HC711D3CFNE3?
All MC68HC711D3CFNE3 units undergo pre-shipment inspection (PSI). If there is an issue with MC68HC711D3CFNE3, 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 MC68HC711D3CFNE3 part is unused and in its original packaging.
Return procedure for MC68HC711D3CFNE3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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