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NXP Semiconductors MC68HC711E20CFN2
- Part No.:
- MC68HC711E20CFN2
- Manufacturer:
- NXP Semiconductors
- Category:
- Microcontrollers
- Package:
- 52-LCC (J-Lead)
- Datasheet:
-
MC68HC711E20CFN2.pdf
- Description:
- IC MCU 8BIT 20KB OTP 52PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:2,879
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Product details
Overview
MC68HC711E20CFN2 from Freescale Semiconductor is an 8-bit microcontroller in the M68HC11E family, featuring 20 KB on-chip EPROM, 512 bytes RAM, and integrated peripherals including a 8-channel 8-bit ADC, SCI, SPI, and timer subsystem with input capture/output compare. It operates at up to 2 MHz bus speed and supports single-chip mode for embedded control in automotive sensors and industrial motor controllers.
For engineers reviewing the MC68HC711E20CFN2 datasheet, MC68HC711E20CFN2 pinout, MC68HC711E20CFN2 application, or MC68HC711E20CFN2 equivalent, key selection criteria include EPROM programmability, 5 V operation, 40-pin ceramic DIP package, and compatibility with HC11 development tools like EVBU and PCbug11.
Technical Context
The MC68HC711E20CFN2 implements the M68HC11 CPU core with 65,536-byte address space, Harvard architecture memory mapping, and configurable operating modes (single-chip, expanded, bootstrap). Its on-chip EPROM is user-programmable via on-board programming algorithm using VPP=12 V.
Peripheral integration includes a 16-bit timer system with four input capture/one output compare channels, full-duplex asynchronous SCI supporting wakeup modes, and synchronous SPI master/slave interface. All I/O ports are individually configurable as input or output with internal pull-ups enabled in reset state.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | M68HC11 8-bit CISC core with 65,536-byte address space and 16-bit index registers |
| Memory | 20 KB on-chip EPROM (user-programmable), 512 bytes RAM, no external memory interface in single-chip mode |
| ADC | 8-channel 8-bit analog-to-digital converter with software-selectable conversion sequence and 25 µs max conversion time |
| Bus Speed | 2 MHz maximum E-clock frequency; derived from crystal or external clock via internal divide-by-two logic |
| Supply Voltage | 5.0 V ±10% operation; no low-voltage extended range (unlike L-version variants) |
| I/O Ports | Port A (8-bit, bidirectional), Port B (8-bit, bidirectional), Port C (6-bit, bidirectional), Port D (6-bit, bidirectional), Port E (8-bit, input-only) |
| Package | 40-pin ceramic dual in-line package (CERDIP), 0.6-inch width, lead spacing 0.1 inch |
Pinout & Package
MC68HC711E20CFN2 uses a 40-pin ceramic DIP (CERDIP) package with 0.6-inch body width and 0.1-inch lead pitch. Pin functions conform to M68HC11E family standard layout, with dedicated VDD/VSS, reset, interrupt, E-clock, and port signal assignments.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD (Pin 1) | Power supply | +5 V main supply rail; decoupling capacitor required adjacent to pin |
| VSS (Pin 20) | Ground reference | Digital ground return; separate analog ground not provided |
| RESET (Pin 21) | Active-low reset input | Asynchronous reset assertion forces CPU to vector to $FFFE–$FFFF; internal pull-up ensures default high state |
| XTAL (Pin 39) | Clock oscillator input | Connects to crystal or external clock source; internal oscillator circuit requires 3.2768 kHz to 4 MHz crystal |
| EXTAL (Pin 40) | Clock oscillator output | Drives crystal; must be left unconnected when using external clock source |
| PORT A0–A7 (Pins 11–18) | General-purpose I/O | Bidirectional 8-bit port; direction controlled by DDRA register; internal pull-ups active on reset |
| PORT E0–E7 (Pins 22–29) | Dedicated input port | 8-bit read-only port; used for system status monitoring and external event detection |
Key Features
| Feature | Design Value |
|---|---|
| On-chip EPROM programming | Supports in-system EPROM programming via VPP=12 V and dedicated bootstrap mode; eliminates need for external programmer |
| SCI wakeup capability | Enables low-power wait mode exit via idle-line or address-mark detection on serial line - critical for battery-powered remote nodes |
| Configurable timer subsystem | Four input capture channels and one output compare channel support precise pulse-width measurement and PWM generation without CPU overhead |
| Single-chip mode operation | Eliminates external memory and glue logic; reduces BOM count and PCB area for cost-sensitive embedded applications |
| Hardware COP watchdog | Computer Operating Properly monitor provides fail-safe reset if software hangs - essential for automotive and safety-critical systems |
Applications
| Automotive Engine Sensor Interface | Industrial Motor Control Panel |
|---|---|
Use Scenario: Reading throttle position, coolant temperature, and oxygen sensor signals in engine control units. IC Role / Device Role / Timing Role: Central data acquisition unit performing real-time ADC sampling, digital filtering, and CAN message preparation (via external transceiver). Use Value: Integrated 8-channel ADC and deterministic 2 MHz bus timing enable synchronized sampling of multiple analog sensors within tight engine cycle deadlines. | Use Scenario: Monitoring motor current, temperature, and encoder feedback while generating gate drive signals for three-phase inverters. IC Role / Device Role / Timing Role: Real-time controller executing PID loops and managing I/O handshaking with power stage drivers and HMI buttons. Use Value: Input capture timers measure encoder edge timing with 500 ns resolution; SCI interface enables configuration updates from operator panel without halting control loop. |
| Legacy Industrial PLC I/O Module | Medical Infusion Pump Controller |
Use Scenario: Replacing obsolete discrete logic in DIN-rail mounted I/O expansion modules with isolated digital inputs and relay outputs. IC Role / Device Role / Timing Role: Deterministic scan engine polling 16 digital inputs and updating 8 relay outputs every 10 ms. Use Value: Single-chip mode and internal EPROM eliminate external memory, reducing failure points and enabling field firmware updates via serial bootloader. | Use Scenario: Controlling stepper motor dosage, monitoring pressure transducers, and logging dose history in Class II medical devices. IC Role / Device Role / Timing Role: Safety-critical controller executing watchdog-checked control tasks and storing calibration data in EEPROM. Use Value: Hardware COP reset and non-volatile EEPROM storage ensure dose accuracy integrity even after unexpected power loss or software fault. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MC68HC11A8CP | 8 KB ROM (mask-programmed), no EPROM; identical pinout and peripheral set | Suitable only for high-volume production with fixed firmware; no field reprogramming capability | Select when firmware is finalized and cost-per-unit optimization is prioritized over flexibility |
| MC68HC11E9CFN | 9 KB EPROM, same CPU core and peripherals; lacks VPP programming voltage pin (Pin 10) | Requires external EPROM programmer; incompatible with in-system programming workflows used for MC68HC711E20CFN2 | Select only if lower memory capacity suffices and bootstrap-mode programming is unnecessary |
Compared with MC68HC11A8CP and MC68HC11E9CFN, the MC68HC711E20CFN2 uniquely supports in-system EPROM programming at 20 KB capacity, making it the only option among the three for iterative firmware development and field updates without hardware changes.
Availability
MC68HC711E20CFN2 is available at Aetrix Electronics and suitable for automotive engine management, industrial motor control, legacy PLC modules, and medical infusion pump controllers requiring stable component supply across long-lifecycle programs.
Supply support for MC68HC711E20CFN2 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 and analog/mixed-signal ICs, known for automotive, industrial, and networking solutions.
The MC68HC711E20CFN2 belongs to the M68HC11E family - a line of cost-optimized, single-chip microcontrollers targeting resource-constrained embedded systems where reliability, in-field programmability, and toolchain maturity were critical design requirements.
FAQ
What is the maximum operating frequency of the MC68HC711E20CFN2?
The MC68HC711E20CFN2 supports a maximum E-clock frequency of 2 MHz, corresponding to a 4 MHz crystal or external clock input. This bus speed defines instruction execution timing and peripheral throughput limits. The device does not support higher frequencies due to internal timing constraints of the EPROM array and CPU pipeline. For designs requiring faster processing, engineers should consider migrating to the M68HC12 family or modern NXP S12 derivatives.
Does the MC68HC711E20CFN2 support in-system programming of its EPROM?
Yes, the MC68HC711E20CFN2 supports in-system EPROM programming using the bootstrap mode and VPP=12 V applied to Pin 10. This capability allows firmware updates without removing the device from the target board. Programming requires the MC68HC11EVBU evaluation board or compatible hardware running PCbug11 software. The process is documented in Freescale Application Note AN1060 and EB296.
What are the key differences between MC68HC711E20CFN2 and MC68HC11E9CFN?
The MC68HC711E20CFN2 features 20 KB of EPROM versus 9 KB in the MC68HC11E9CFN, and includes Pin 10 (VPP) for in-system programming. The MC68HC11E9CFN lacks VPP and requires external programming equipment. Both share identical peripheral sets, CPU core, and 40-pin CERDIP package. Firmware developed for MC68HC11E9CFN can run on MC68HC711E20CFN2 if memory map usage stays within 9 KB.
Is the MC68HC711E20CFN2 RoHS compliant?
No, the MC68HC711E20CFN2 is not RoHS compliant. It is a legacy ceramic DIP device manufactured prior to the 2006 RoHS directive implementation and contains leaded solder in its package construction. For RoHS-compliant alternatives, engineers should evaluate NXP's S12XE or S12G families, which offer pin-compatible migration paths with updated packaging and environmental compliance.
Can the MC68HC711E20CFN2 operate from a 3.3 V supply?
No, the MC68HC711E20CFN2 is specified for 5.0 V ±10% operation only. It lacks the internal voltage regulation or level-shifting circuitry required for 3.3 V compatibility. Attempting to power it from 3.3 V will result in undefined behavior, failed EPROM reads, and unreliable peripheral operation. For 3.3 V systems, consider the MC68HC11L series or modern 3.3 V microcontrollers with compatible instruction sets.
MC68HC711E20CFN2 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Package/Case:
- 52-LCC (J-Lead)
- Series:
- HC11
- Packaging:
- Tube
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Core Processor:
- HC11
- Core Size:
- 8-Bit
- Speed:
- 2MHz
- Connectivity:
- SCI, SPI
- Peripherals:
- POR, WDT
- Number of I/O:
- 38
- Program Memory Size:
- 20KB (20K x 8)
- Program Memory Type:
- OTP
- EEPROM Size:
- 512 x 8
- RAM Size:
- 768 x 8
- Voltage - Supply (Vcc/Vdd):
- 4.5V ~ 5.5V
- Data Converters:
- A/D 8x8b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
MC68HC711E20CFN2 FAQ
1.How can I place an order for MC68HC711E20CFN2 through Aetrix?
Please submit a Request for Quotation (RFQ) for MC68HC711E20CFN2 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 MC68HC711E20CFN2 reliable?
The price and inventory of MC68HC711E20CFN2 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MC68HC711E20CFN2 is usually 5 days.
3.What payment methods are accepted for MC68HC711E20CFN2?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MC68HC711E20CFN2 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MC68HC711E20CFN2?
MC68HC711E20CFN2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MC68HC711E20CFN2 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 MC68HC711E20CFN2?
For technical support, including MC68HC711E20CFN2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MC68HC711E20CFN2 requirements.
6.How does Aetrix verify that MC68HC711E20CFN2 is sourced from the original manufacturer or authorized distributors?
All MC68HC711E20CFN2 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 MC68HC711E20CFN2 meets industry standards.
7.What is the process for return or replacement of MC68HC711E20CFN2?
All MC68HC711E20CFN2 units undergo pre-shipment inspection (PSI). If there is an issue with MC68HC711E20CFN2, 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 MC68HC711E20CFN2 part is unused and in its original packaging.
Return procedure for MC68HC711E20CFN2:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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