NXP Semiconductors MCIMX281AVM4B

Overview

MCIMX281AVM4B from NXP Semiconductors is an AEC-Q100 qualified automotive applications processor based on the ARM926EJ-S core operating at up to 454 MHz, featuring integrated power management (triple-output DC-DC + Li-ion charger), dual FlexCAN interfaces, and 128 KB on-chip SRAM - designed for cost-optimized infotainment gateways and telematics control units in passenger vehicles.

For engineers reviewing the MCIMX281AVM4B datasheet, MCIMX281AVM4B pinout, MCIMX281AVM4B application, or MCIMX281AVM4B equivalent, key selection criteria include its –40°C to +85°C automotive temperature grade, MAPBGA-289 (14 × 14 mm, 0.8 mm pitch) package, dual CAN 2.0B support, absence of LCD interface (distinguishing it from i.MX285), and integrated PMU with battery charging capability.

Technical Context

The MCIMX281AVM4B implements a single ARM926EJ-S CPU with 16 KB instruction and 32 KB data cache, CoreSight ETM9 debug, and parallel JTAG interface. Its memory subsystem supports mobile DDR, DDR2, and LV-DDR2 up to 205 MHz, plus up to eight NAND Flash devices with 20-bit BCH ECC.

Connectivity includes two 10/100 Ethernet MACs (one with IEEE 1588 timestamping), USB 2.0 OTG + host PHYs, four SSPs (SDIO/MMC/SPI), two I²C interfaces (400 kbps), five UARTs (3.25 Mbps), SPDIF transmitter, dual SAIF audio interfaces, and 16-channel LRADC + 12-bit HSADC (2 Msps). The integrated PMU delivers regulated VDD4P2 (4.2 V), linear regulators, and battery charge control with brownout detection.

Key Specifications

Pinout & Package

MCIMX281AVM4B uses a plastic MAPBGA-289 package (14 × 14 mm, 0.8 mm pitch) with exposed thermal pad. Ball assignments are defined in Section 4.4 ("i.MX281 Ball Map") of the IMX28AEC datasheet. Key functional groups include dedicated power/ground balls (VDDA, VDDD, VDDIO, VDD5V, BATT), analog inputs (LRADC0–LRADC7, RTC_XTALI/O), digital I/O banks (GPIO0–GPIO4), and high-speed interface balls (USB_DP/DN, ENET_MDC/MDIO, CANH/CANL).

Key Features

Applications

Equivalent & Alternatives

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

Compared with MCIMX285AVM4B, MCIMX281AVM4B removes LCD interface circuitry to reduce cost and power for headless gateways; compared with MCIMX233CJM4B, it integrates PMU, USB PHY, and dual CAN - eliminating ≥7 external components and shortening time-to-certification for automotive deployments.

Availability

MCIMX281AVM4B is available at Aetrix Electronics and suitable for automotive infotainment gateways, telematics control units, and industrial vehicle telematics requiring stable component supply across extended product lifecycles.

Supply support for MCIMX281AVM4B 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 automotive, industrial, and IoT applications, delivering secure, energy-efficient processors and connectivity solutions.

The i.MX28 family was engineered specifically for cost-sensitive automotive infotainment and gateway systems, integrating power management, security, and multiple high-speed interfaces into a single AEC-Q100 qualified SoC.

FAQ

What is the maximum operating frequency of the MCIMX281AVM4B CPU core?

The MCIMX281AVM4B features an ARM926EJ-S core rated for operation up to 454 MHz. This frequency is achievable under specified voltage (VDDD ≥ 1.35 V) and temperature (–40°C to +85°C) conditions per the IMX28AEC datasheet Rev. 4. The core includes 16 KB instruction and 32 KB data cache, and supports JTAG and CoreSight ETM9 for real-time trace and debug. Performance scales linearly with supply voltage and ambient temperature within rated limits.

Does the MCIMX281AVM4B support LCD display interfaces?

No, the MCIMX281AVM4B does not include an LCD interface (LCDIF) or touchscreen controller. This is a deliberate functional differentiation from the i.MX285 variant, as confirmed in Table 2 ("i.MX28 Functional Differences") of the IMX28AEC datasheet. Systems requiring RGB or system-mode LCD panels must use MCIMX285AVM4B instead. The MCIMX281AVM4B is optimized for headless gateway applications where display hardware is absent.

What power supply rails does the MCIMX281AVM4B require?

The MCIMX281AVM4B requires five primary supply rails: VDDA (1.62–2.10 V analog), VDDD (1.35–1.55 V core), VDDIO (3.0–3.6 V I/O), VDD5V (4.75–5.25 V), and BATT/DCDC_BATT (3.10–4.24 V). The integrated PMU generates VDD4P2 (4.2 V) and regulates linear supplies for internal blocks. External decoupling capacitors per the reference schematic are mandatory; no external DC-DC converters are needed for basic operation.

How many CAN interfaces does the MCIMX281AVM4B support?

The MCIMX281AVM4B supports two Controller Area Network (FlexCAN) 2.0B interfaces, each capable of 1 Mbps operation. These are independent hardware modules with dedicated message buffers and FIFOs, enabling concurrent communication on separate CAN buses - for example, one for powertrain and one for body electronics. External CAN transceivers are required for physical layer interfacing.

Is the MCIMX281AVM4B qualified for automotive use?

Yes, the MCIMX281AVM4B is AEC-Q100 qualified for Grade 3 (–40°C to +85°C ambient), as explicitly stated in the Introduction section of the IMX28AEC datasheet. It meets automotive reliability requirements including ESD immunity (2 kV HBM, 500 V CDM), thermal performance (TJ ≤ 105°C), and long-term stability under vibration, humidity, and temperature cycling - making it suitable for dashboard, center console, and under-hood telematics applications.