NXP Semiconductors S9KEAZN32ACLC

Overview

S9KEAZN32ACLC from NXP Semiconductors is a 32-bit ARM® Cortex®-M0+ microcontroller designed for cost-sensitive automotive body electronics. It integrates 32 KB Flash, 4 KB RAM, 256 B EEPROM emulation, operates at up to 40 MHz bus frequency, and features FlexTimer (FTM), UART, ADC, GPIO, and I²C peripherals - deployed in entry-level window controllers, seat/mirror modules, and ambient lighting systems.

For engineers reviewing the S9KEAZN32ACLC datasheet, S9KEAZN32ACLC pinout, S9KEAZN32ACLC application, or S9KEAZN32ACLC equivalent, key selection criteria include its 40 MHz max bus speed with internal clock source (ICS) FLL, 57 GPIOs across multiple ports, automotive-grade EMC/ESD robustness, and support for 2.7–5.5 V supply voltage in LQFP-64 packaging.

Technical Context

The S9KEAZN32ACLC implements an Internal Clock Source (ICS) module with Frequency-Locked Loop (FLL), configurable for FEI mode using internal reference oscillator (31.25 kHz or 39.0625 kHz depending on variant), enabling stable 20 MHz bus clock via BDIV prescaler. Its FlexTimer Module (FTM) provides 16-bit counter capability with output compare, input capture, and PWM generation for motor control and timing-critical functions.

Peripherals include three UART channels supporting 9600 baud (bus-clock-derived), 12-bit ADC with up to 16 channels, two I²C interfaces, analog comparators (ACMP), and keyboard interrupt (KBI) inputs. All modules are clock-gated via SIM and mapped to dedicated GPIO pins with flexible port control registers (PDDR, PSOR, PCOR, PTOR).

Key Specifications

Pinout & Package

LQFP-64 package with 0.5 mm pitch, 10 mm × 10 mm body size, and exposed thermal pad - suitable for automotive PCB layouts requiring thermal reliability and reflow compatibility.

Key Features

Applications

Equivalent & Alternatives

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

Compared with S9KEAZN16ACLC and S9KEAZN64ACLC, the S9KEAZN32ACLC offers balanced memory capacity for mid-tier automotive body controllers - providing headroom beyond basic functions while avoiding over-provisioning that increases cost and power consumption.

Availability

S9KEAZN32ACLC is available at Aetrix Electronics and suitable for automotive body control units, seat/mirror actuation systems, and ambient lighting modules requiring stable component supply, long-term lifecycle support, and AEC-Q100-compliant sourcing.

Supply support for S9KEAZN32ACLC 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 qualification standards.

The Kinetis EA series - including S9KEAZN32ACLC - was engineered specifically for cost-optimized, robust automotive body electronics, emphasizing low-pin-count scalability, EMC resilience, and integrated analog/motor-control peripherals.

FAQ

What is the maximum operating frequency of the S9KEAZN32ACLC core?

The S9KEAZN32ACLC uses an ARM® Cortex®-M0+ core running at a maximum bus frequency of 40 MHz, achieved via its Internal Clock Source (ICS) module with Frequency-Locked Loop (FLL). This frequency governs peripheral timing including UART baud rate generation, ADC sampling, and FTM counter increments - all verified in AN4942 configuration examples for the S9KEAZN32ACLC.

Does the S9KEAZN32ACLC support external crystal oscillators?

Yes, the S9KEAZN32ACLC supports external crystals via XTAL/EXTAL pins for frequencies between 4 MHz and 32 MHz, enabling higher clock accuracy than the internal ICS FLL. However, AN4942 confirms the S9KEAZN32ACLC can operate fully in FEI mode using only the internal reference oscillator - eliminating crystal BOM cost where timing tolerance permits.

How many UART interfaces does the S9KEAZN32ACLC include, and what are their key capabilities?

The S9KEAZN32ACLC integrates three UART modules supporting full-duplex NRZ communication, programmable 8-/9-bit character length, 1-/2-stop-bit selection, parity enable/disable, and hardware flow control. Each UART derives baud rate from the bus clock and supports both polling and interrupt-driven operation - validated in AN4942 Lab 1 for S9KEAZN32ACLC-compatible TRK-KEA platforms.

What is the role of the FlexTimer Module (FTM) in the S9KEAZN32ACLC?

The FTM in the S9KEAZN32ACLC is a 16-bit timer supporting output compare, input capture, and PWM generation. It enables precise timing functions such as LED dimming, motor speed control, and ultrasonic echo measurement - with channel interrupts triggered on counter match events. AN4942 Lab 2 demonstrates FTM use for LED toggling on S9KEAZN32ACLC-targeted evaluation boards.

Is the S9KEAZN32ACLC qualified for automotive applications?

Yes, the S9KEAZN32ACLC is AEC-Q100 Grade 2 qualified (−40°C to +105°C) and designed for automotive body electronics. Its datasheet and AN4942 emphasize exceptional EMC/ESD robustness, 2.7–5.5 V supply range accommodating battery transients, and features like EEPROM emulation for fault logging - all aligned with automotive reliability requirements for the S9KEAZN32ACLC.