NXP Semiconductors MCHC11F1CFNE4

Overview

MCHC11F1CFNE4 from Freescale Semiconductor is an 8-bit microcontroller unit (MCU) featuring a 256-byte RAM, 512-byte EEPROM, and 12 KB on-chip ROM. It integrates a serial communications interface (SCI), serial peripheral interface (SPI), 8-channel 8-bit analog-to-digital converter (ADC), and a 16-bit timer system with input capture and output compare functions. It targets embedded control in automotive body electronics and industrial sensor interfaces.

For engineers reviewing the MCHC11F1CFNE4 datasheet, MCHC11F1CFNE4 pinout, MCHC11F1CFNE4 application, or MCHC11F1CFNE4 equivalent, key selection criteria include its single-chip operating mode, 4 MHz maximum bus frequency, 68-pin PLCC package, and support for COP watchdog and real-time interrupt (RTI) functionality.

Technical Context

The MCHC11F1CFNE4 implements the MC68HC11 CPU core with full instruction set compatibility to the Motorola 6800 family. It operates in single-chip mode by default, executing code from internal ROM and using on-chip RAM and EEPROM for data and nonvolatile storage.

Its timing system includes a programmable prescaler chain feeding a 16-bit free-running counter, four input capture registers, five output compare registers, and dedicated pulse accumulator logic. The ADC supports single- and multi-channel conversions with software-triggered start and configurable sample-and-hold timing.

Key Specifications

Pinout & Package

Package: 68-pin Plastic Leaded Chip Carrier (PLCC), JEDEC MO-047AC compliant, 24.2 mm × 24.2 mm footprint, 1.78 mm height, lead-free (Pb-free) variant per RoHS Directive.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 8-bit microcontroller applications.

Compared with MC68HC11E9CP2 and MC9S12XDP512, the MCHC11F1CFNE4 offers optimal balance of proven reliability, minimal external components, and sufficient resources for cost-sensitive embedded control-making it ideal for legacy system maintenance and low-complexity OEM modules where footprint and toolchain continuity matter.

Availability

MCHC11F1CFNE4 is available at Aetrix Electronics and suitable for automotive body electronics, industrial sensor nodes, smart meter auxiliary functions, and legacy machine controller retrofits requiring stable component supply and long-term lifecycle support.

Supply support for MCHC11F1CFNE4 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 since 2015) was a leading designer of embedded processors, analog, and mixed-signal ICs for automotive, industrial, and consumer markets.

The MC68HC11 family-including the MCHC11F1CFNE4-was engineered for deterministic real-time control in resource-constrained environments, emphasizing low-power operation, on-chip nonvolatile storage, and robust peripheral integration for automotive and industrial applications.

FAQ

What is the maximum operating frequency of the MCHC11F1CFNE4?

The MCHC11F1CFNE4 supports a maximum bus frequency of 4 MHz, derived from an external crystal (1–4 MHz) or oscillator connected to XTAL/EXTAL pins. This frequency governs instruction execution speed, peripheral timing, and ADC conversion rate. The internal clock divider ensures stable operation across voltage and temperature ranges, and all timing specifications in the datasheet assume this 4 MHz maximum condition.

Does the MCHC11F1CFNE4 support in-circuit programming?

No, the MCHC11F1CFNE4 does not support in-circuit programming. Its 12 KB ROM is mask-programmed during fabrication and cannot be modified post-manufacture. However, the integrated 512-byte EEPROM can be reprogrammed in-system via standard firmware routines using the PPROG register and CONFIG register controls, enabling field updates of calibration data or configuration parameters without replacing the MCHC11F1CFNE4.

How many I/O pins does the MCHC11F1CFNE4 provide in its 68-pin PLCC package?

The MCHC11F1CFNE4 provides 56 dedicated I/O pins across seven 8-bit ports (PORT A through PORT G), all fully programmable as input or output with individual direction control. Additional pins serve fixed functions including RESET, IRQ, XIRQ, E, 4XOUT, R/W, and power/ground. No port pins are multiplexed with analog functions-the ADC inputs are separate pins (AD0–AD7), preserving full digital I/O count.

What power-saving modes does the MCHC11F1CFNE4 support?

The MCHC11F1CFNE4 supports two low-power modes: WAIT and STOP. In WAIT mode, the CPU halts while peripherals (SCI, SPI, timer, ADC) remain active and responsive to interrupts. In STOP mode, all clocks are gated except for RAM retention circuitry, reducing current draw to ~10 µA. Both modes are entered via software instruction and exited by interrupt or reset, enabling flexible energy management in battery-powered or thermally constrained applications using the MCHC11F1CFNE4.

Is the MCHC11F1CFNE4 RoHS-compliant?

Yes, the MCHC11F1CFNE4 is RoHS-compliant and Pb-free, meeting EU Directive 2011/65/EU requirements. Freescale confirmed RoHS compliance for this part number in its official ordering information appendix (Appendix B), and the device carries appropriate marking per JEDEC standards. Functionality and electrical characteristics match those of non-RoHS versions, and no derating or design changes are required when substituting the MCHC11F1CFNE4 into legacy RoHS-compliant designs.