NXP Semiconductors MC68HC711E9MFNE2

Overview

MC68HC711E9MFNE2 from NXP (formerly Freescale) is an 8-bit microcontroller in the M68HC11E family, featuring 512 bytes of on-chip EEPROM, 256 bytes of RAM, a 10-bit ADC with 8 channels, two 16-bit timer modules, and integrated SCI/SPI serial interfaces. It operates at up to 3 MHz in single-chip mode and supports automotive and industrial control applications requiring nonvolatile program storage and analog sensing.

For engineers reviewing the MC68HC711E9MFNE2 datasheet, MC68HC711E9MFNE2 pinout, MC68HC711E9MFNE2 application, or MC68HC711E9MFNE2 equivalent, key selection criteria include EPROM programmability, on-chip security features, 3.0–5.5 V extended voltage operation, and compatibility with legacy HC11 development tools including EVBU and PCbug11.

Technical Context

The MC68HC711E9MFNE2 implements the M68HC11 CPU core with full instruction set compatibility, supporting single-chip, expanded, bootstrap, and test operating modes. Its memory architecture includes mask-programmed ROM (not present in E9 variant), user-programmable EPROM (512 B), and EEPROM (512 B), with dedicated CONFIG register for protection and boot-mode configuration.

Peripheral integration includes a 10-bit successive-approximation ADC with 8 input channels and software-selectable conversion time, dual 16-bit timer systems supporting input capture, output compare, pulse accumulation, and real-time interrupt generation, plus full-duplex asynchronous SCI and synchronous SPI interfaces with independent baud rate and clock control.

Key Specifications

Pinout & Package

MC68HC711E9MFNE2 is housed in a 52-pin Plastic Leaded Chip Carrier (PLCC) package with J-lead geometry, designed for reflow soldering and high-reliability industrial mounting. Pin numbering follows standard PLCC convention (pin 1 marked by corner notch).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar microcontroller applications.

Compared with MC68HC711E9MFNE2, the MC68HC11A8CP offers lower unit cost but forfeits field-upgradability, while the MC912B32CFUE8 delivers modern peripherals and flash density at the expense of HC11 instruction set compatibility and design continuity.

Availability

MC68HC711E9MFNE2 is available at Aetrix Electronics and suitable for automotive engine management, industrial temperature control, medical infusion pumps, and legacy PLC I/O modules requiring stable component supply and long-term obsolescence management.

Supply support for MC68HC711E9MFNE2 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 is a global semiconductor leader focused on secure connectivity solutions for automotive, industrial, and IoT applications.

The M68HC11E family was designed for cost-sensitive, real-time embedded control in automotive and industrial environments where deterministic timing, analog integration, and long-lifecycle support are critical.

FAQ

What is the maximum operating frequency of the MC68HC711E9MFNE2?

The MC68HC711E9MFNE2 operates at a maximum system clock frequency of 3 MHz. This corresponds to a 1.5 MHz E-clock output and defines the upper limit for instruction execution speed, timer resolution, and serial baud rates. The device achieves this timing using an external crystal or clock source applied to the XTAL/EXTAL pins, with internal divide-by-two circuitry generating the E-clock.

Does the MC68HC711E9MFNE2 support in-system programming of its EPROM?

Yes, the MC68HC711E9MFNE2 supports in-system EPROM programming via the XIRQ/VPPE pin, which accepts 12.5 V programming voltage. This capability enables field firmware updates without removing the IC from the PCB. Programming requires specific timing sequences and verification steps documented in Freescale Application Note AN1060 and EB296, and must be performed under controlled voltage and temperature conditions.

How does the MC68HC711E9MFNE2 handle analog-to-digital conversion?

The MC68HC711E9MFNE2 integrates a 10-bit successive-approximation ADC with eight multiplexed input channels. Conversion is initiated by software or timer trigger, with configurable sample time and result stored in 16-bit result registers. The ADC operates from the same VDD supply, uses internal reference, and achieves ±1 LSB integral nonlinearity - enabling accurate sensor interfacing in industrial and automotive applications.

What packaging format is used for the MC68HC711E9MFNE2?

The MC68HC711E9MFNE2 is packaged in a 52-pin Plastic Leaded Chip Carrier (PLCC) with MFNE2 suffix. This surface-mount J-lead package provides mechanical robustness, thermal stability, and compatibility with standard reflow soldering processes. Pin 1 is identified by a corner notch, and the package footprint matches industry-standard PLCC-52 land patterns.

Can the MC68HC711E9MFNE2 operate from a 3.3 V supply?

Yes, the MC68HC711E9MFNE2 supports an extended operating voltage range of 3.0 V to 5.5 V, making it compatible with 3.3 V logic systems. At 3.3 V, the maximum guaranteed operating frequency is reduced per the DC characteristics table in Section 10.7 of the datasheet; full 3 MHz operation is specified at VDD ≥ 4.5 V, while 2 MHz is guaranteed at 3.3 V with appropriate derating.