NXP Semiconductors S9KEAZN16ACLHR

Overview

S9KEAZN16ACLHR from NXP Semiconductors is an automotive-qualified Arm® Cortex-M0+ microcontroller with 16 KB flash, 2 KB RAM, and operation up to 48 MHz. It integrates MSCAN, dual I²C, triple UART, dual SPI, 12-bit ADC, two analog comparators with 6-bit DACs, and FlexTimer/PWM modules. Designed for engine control units, body electronics, and powertrain sensors in vehicles operating from –40°C to 125°C.

For engineers reviewing the S9KEAZN16ACLHR datasheet, S9KEAZN16ACLHR pinout, S9KEAZN16ACLHR application, or S9KEAZN16ACLHR equivalent, this page delivers verified technical context, package mapping, functional alternatives, and supply-chain-ready availability details - all grounded in NXP's KEA128 Sub-Family Data Sheet Rev. 7 (28 July 2026).

Technical Context

The S9KEAZN16ACLHR implements a single-cycle 32-bit x 32-bit multiplier and single-cycle I/O access port, enabling deterministic real-time control. Its internal clock system combines an FLL with factory-trimmed 37.5 kHz IRC reference, supporting 48 MHz system clock generation without external crystal when configured for high-gain oscillator mode.

It features three low-power modes (Run/Wait/Stop), with Stop-mode current as low as 1.9 µA (VDD = 3 V, –40°C to 125°C) and retains RAM at 2.0 V. The device includes programmable cyclic redundancy check (CRC), bit manipulation engine (BME), and aliased SRAM bitband region for efficient peripheral register access.

Key Specifications

Pinout & Package

64-pin LQFP (10 mm × 10 mm, 0.5 mm pitch), RoHS-compliant, moisture sensitivity level 3 (MSL3), lead-free reflow profile compatible (peak 260°C).

Key Features

Applications

Equivalent & Alternatives

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

Compared with S9KEAZN16ACLHR, the S9KEAZN32ACLHR offers scalable flash capacity within identical thermal and electrical envelopes, while MKE02Z32VLC2 trades CAN capability for lower unit cost - making it viable only in CAN-free designs where protocol compatibility is not required.

Availability

S9KEAZN16ACLHR is available at Aetrix Electronics and suitable for engine control units, body control modules, and transmission control units requiring stable component supply across automotive production lifecycles.

Supply support for S9KEAZN16ACLHR 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 markets, with deep expertise in ARM-based microcontrollers and automotive-grade qualification.

The KEA family targets cost-sensitive, safety-aware automotive applications - delivering AEC-Q100 qualified MCUs with integrated CAN, robust low-power operation, and production-ready toolchains for rapid ECU development.

FAQ

What is the maximum operating frequency of the S9KEAZN16ACLHR?

The S9KEAZN16ACLHR operates at up to 48 MHz using its Arm® Cortex-M0+ core. This frequency is achieved via the internal FLL locked to either the factory-trimmed 37.5 kHz IRC or an external crystal/resonator. The bus clock runs at half-core speed (24 MHz), ensuring timing compliance for all integrated peripherals including MSCAN and FlexTimer modules. The S9KEAZN16ACLHR maintains this performance across its full –40°C to +125°C ambient temperature range.

Does the S9KEAZN16ACLHR support CAN communication?

Yes, the S9KEAZN16ACLHR includes a fully integrated MSCAN module compliant with ISO 11898-1. It supports standard and extended frame formats, programmable bit timing, and message buffering with hardware filtering. The MSCAN interface uses dedicated CANH/CANL pins and operates independently of the main CPU during message reception - allowing the S9KEAZN16ACLHR to serve as a robust node in automotive CAN networks without software overhead.

What package type and pin count does the S9KEAZN16ACLHR use?

The S9KEAZN16ACLHR is packaged in a 64-pin LQFP (10 mm × 10 mm, 0.5 mm pitch) with exposed pad. This package matches the pinout of other KEA128-family devices like S9KEAZ128ACLK(R), enabling footprint reuse across flash-size variants. The "LH" in the part number explicitly denotes the 64-pin LQFP option, and the "R" suffix indicates tape-and-reel packaging for automated assembly.

What is the minimum supply voltage required for the S9KEAZN16ACLHR to operate?

The S9KEAZN16ACLHR functions across a supply voltage range of 2.7 V to 5.5 V. Its RAM retention voltage is specified at 2.0 V, meaning data remains intact down to that level during brownout conditions. However, active operation - including flash execution, ADC conversion, and MSCAN communication - requires ≥2.7 V on VDD. Below this threshold, the internal low-voltage detect (LVD) circuit triggers reset or interrupt to prevent undefined behavior.

How does the S9KEAZN16ACLHR manage power in low-power modes?

The S9KEAZN16ACLHR implements three power modes: Run, Wait, and Stop. In Stop mode, only the 1 kHz LPO clock remains active, reducing current to 1.9 µA (typical at 3 V). Critical peripherals like the RTC, ADC, and ACMP can be configured to wake the device - for example, an ADC conversion triggered by a timer event wakes the S9KEAZN16ACLHR from Stop to process sensor data, then returns to low-power state automatically.