NXP Semiconductors MCIMX281AVM4C

Overview

MCIMX281AVM4C from NXP Semiconductors is an AEC-Q100 qualified automotive applications processor based on the ARM926EJ-S core running at 454 MHz, featuring integrated power management (triple-output DC-DC + linear regulators), dual FlexCAN interfaces, USB 2.0 OTG + host PHYs, and a 128-Kbyte on-chip SRAM for RTOS-based infotainment gateways. It supports DDR2, LV-DDR2, and NAND Flash with 20-bit BCH ECC.

For engineers reviewing the MCIMX281AVM4C datasheet, MCIMX281AVM4C pinout, MCIMX281AVM4C application, or MCIMX281AVM4C equivalent, key selection criteria include its –40°C to +85°C automotive temperature rating, MAPBGA-289 package with 0.8 mm pitch, dual CAN bus support, integrated PMU with Li-ion charging, and absence of LCD/touchscreen interface (distinguishing it from i.MX285).

Technical Context

The MCIMX281AVM4C implements a single ARM926EJ-S CPU with 16-Kbyte instruction and 32-Kbyte data cache, CoreSight ETM9 debug support, and parallel JTAG interface. Its memory subsystem includes 128-Kbyte mask-ROM, 128-Kbyte SRAM, and external memory interface supporting DDR2 (1.8 V), LV-DDR2 (1.5 V), and mobile DDR up to 205 MHz clock frequency.

Connectivity is defined by two FlexCAN 2.0B controllers (1 Mbps), one USB 2.0 OTG + one USB 2.0 host (both with integrated PHYs), 10/100 Ethernet MAC with IEEE 1588 timestamping, four SSPs (SDIO/MMC/SPI), five AUARTs (up to 3.25 Mbps), two I²C interfaces (400 kbps), and SPDIF/SAIF audio interfaces - all mapped to dedicated pins in the MAPBGA-289 package.

Key Specifications

Pinout & Package

MCIMX281AVM4C uses the MAPBGA-289 plastic package (14 × 14 mm, 0.8 mm pitch), with ball assignments documented in Section 4.4 ("i.MX281 Ball Map") of the IMX28AEC datasheet. Power, ground, and signal terminals are organized across four quadrants with dedicated VDDA/VDDD/VDDIO rails, differential USB DP/DN, CANH/CANL pairs, and EMI-controlled DDR/NAND routing zones.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MCIMX283AVM4C and MCIMX285AVM4C, the MCIMX281AVM4C delivers identical processing, networking, and power management capabilities while omitting display-specific peripherals - making it the most cost-effective and thermally efficient choice for automotive gateway and telematics applications where external display controllers are used.

Availability

MCIMX281AVM4C is available at Aetrix Electronics and suitable for automotive infotainment gateways, telematics control units, and industrial vehicle display controllers requiring stable component supply across extended product lifecycles.

Supply support for MCIMX281AVM4C 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 specializing in secure connectivity solutions for automotive, industrial, and IoT applications, with deep expertise in ARM-based application processors and automotive-grade reliability.

The i.MX28 family - including MCIMX281AVM4C - was designed specifically for cost-optimized, AEC-Q100 qualified automotive infotainment and gateway systems requiring integrated power management, dual CAN, and secure boot capabilities.

FAQ

What is the maximum operating frequency of the ARM926EJ-S core in MCIMX281AVM4C?

The MCIMX281AVM4C integrates an ARM926EJ-S core rated for operation at up to 454 MHz under specified voltage and temperature conditions (VDDD = 1.35–1.55 V, TA = –40°C to +85°C). This frequency is achieved using the on-chip PLL with fractional divider configuration and requires proper decoupling and thermal management per the IMX28AEC datasheet layout guidelines.

Does MCIMX281AVM4C support secure boot, and what cryptographic algorithms are implemented?

Yes, MCIMX281AVM4C supports hardware-accelerated secure boot via High Assurance Boot version 4 (HAB4), using 128-bit AES decryption for encrypted images and SHA-1/SHA-256 hashing for signature verification. These functions are implemented in the DCP (Data Co-Processor) and OCOTP modules, enabling tamper-resistant firmware validation during cold boot and recovery sequences.

How does the power management unit (PMU) in MCIMX281AVM4C handle battery charging and 5-V system supply?

The MCIMX281AVM4C PMU integrates a Li-ion battery charger, triple-output DC-DC converter, and four linear regulators. It supports automatic switchover between 5-V input and battery supply, generates VDD4P2 (4.2 V) for USB host output, and enforces programmable current limits to prevent overloading the 5-V source - all managed through dedicated PMU registers without external components.

What NAND Flash configurations are supported by MCIMX281AVM4C's GPMI interface?

The MCIMX281AVM4C supports up to eight NAND Flash devices via its General-Purpose Media Interface (GPMI), with 8-bit data width, 50-MBps I/O speed, and hardware-accelerated 20-bit BCH error correction. It supports SLC and MLC NAND types, including ONFI-compliant devices, and allows chip-select multiplexing to reduce pin count in space-constrained automotive PCB layouts.

Is MCIMX281AVM4C pin-compatible with other i.MX28 variants such as MCIMX285AVM4C?

Yes, MCIMX281AVM4C is pin-compatible with MCIMX285AVM4C and MCIMX283AVM4C in the MAPBGA-289 package (14 × 14 mm, 0.8 mm pitch), sharing identical ball maps for power, ground, and all I/O signals. Functional differences - such as LCDIF and touchscreen controller presence - are implemented internally and do not affect PCB layout or mechanical compatibility.