NXP Semiconductors S9KEAZN8AMFKR

Overview

S9KEAZN8AMFKR from NXP Semiconductors is an automotive-qualified Arm® Cortex-M0+ microcontroller with 8 KB flash, 1 KB RAM, and operation up to 48 MHz-designed for embedded control in harsh environments. It features a 12-bit SAR ADC (12-channel), dual analog comparators with integrated 6-bit DACs, and supports -40°C to +125°C ambient operation on 2.7–5.5 V supply.

For engineers reviewing the S9KEAZN8AMFKR datasheet, S9KEAZN8AMFKR pinout, S9KEAZN8AMFKR application, or S9KEAZN8AMFKR equivalent, key selection criteria include its QFN-24 package, automotive temperature grade (M), absence of CAN interface (N), and support for low-power Stop mode with 2 µA typical current at 5 V.

Technical Context

The S9KEAZN8AMFKR implements a single-cycle 32-bit x 32-bit multiplier and single-cycle I/O access port, enabling deterministic real-time control. Its clock system integrates an internal 37.5 kHz factory-trimmed reference for FLL-based 48 MHz system clock generation, plus optional external crystal support (32.768 kHz or 4–24 MHz).

System-level power management includes three operational modes (Run, Wait, Stop), low-voltage detection with configurable trip points, and independent-clock watchdog (WDOG). Peripheral integration covers one SPI, one UART, one I²C, six-channel FlexTimer/PWM, RTC, and programmable CRC module-all accessible via SWD debug interface.

Key Specifications

Pinout & Package

24-pin QFN (4 mm × 4 mm, 0.5 mm pitch) with wettable flanks; thermal pad exposed on underside for enhanced heat dissipation in high-temperature environments.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MC9S08QG8CDTE and S32K116LHT0MLF, the S9KEAZN8AMFKR delivers optimal balance of automotive qualification, modern Cortex-M0+ architecture, and minimal footprint - making it ideal for cost- and space-constrained entry-level automotive and industrial control where CAN is unnecessary.

Availability

S9KEAZN8AMFKR is available at Aetrix Electronics and suitable for automotive body electronics, industrial sensor nodes, smart appliance motor control, and portable medical diagnostics requiring stable component supply across extended temperature ranges.

Supply support for S9KEAZN8AMFKR 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.

The KEA8 family-including S9KEAZN8AMFKR-is engineered for cost-sensitive, high-reliability embedded control applications demanding automotive qualification, low-power operation, and simplified design-in with integrated analog and timing peripherals.

FAQ

What is the maximum operating frequency of the S9KEAZN8AMFKR?

The S9KEAZN8AMFKR operates at up to 48 MHz using its Arm® Cortex-M0+ core. This frequency is achieved via the internal FLL locked to either the 37.5 kHz factory-trimmed internal reference or an external crystal/resonator (4–24 MHz). Bus frequency runs at half the core speed (24 MHz), and all timing-critical peripherals-including FTM and ADC-are synchronized to this bus clock. The S9KEAZN8AMFKR maintains full specification compliance across its entire -40°C to +125°C temperature range at this speed.

Does the S9KEAZN8AMFKR support CAN communication?

No, the S9KEAZN8AMFKR does not include a CAN controller. The 'N' in its part number (S9KEAZN8AMFKR) explicitly denotes "CAN not available" per NXP's KEA part numbering scheme. Communication interfaces are limited to one SPI, one UART, and one I²C module. For CAN-enabled variants in the same KEA8 family, engineers should consider part numbers with blank 'C' field (e.g., S9KEAZ16AMFKR), but those require separate qualification and layout validation.

What is the lowest power consumption mode supported by the S9KEAZN8AMFKR?

The lowest power mode is Stop mode, with typical current draw of 2 µA at 5 V and -40°C to +125°C ambient. In this mode, the 1 kHz low-power oscillator (LPO) remains active to sustain RTC and allow wake-up via GPIO, comparator output, or RTC alarm. Additional current adders apply if ADC or LVD are enabled (e.g., +86 µA for ADC in low-power configuration). The S9KEAZN8AMFKR achieves this ultra-low quiescent current without external components, leveraging internal clock gating and retention logic for SRAM.

How many GPIO pins does the S9KEAZN8AMFKR provide in its QFN-24 package?

The S9KEAZN8AMFKR in the 24-pin QFN package provides 18 usable GPIO pins. While the KEA8 family supports up to 57 GPIO across larger packages, pin count is constrained by the 24-pin footprint: PTA0–PTA7 (8 pins), PTB0–PTB7 (8 pins), and PTC0–PTC3 (4 pins) are available, with remaining pins dedicated to power, reset, debug, and oscillator functions. All GPIO support programmable pull-ups, slew rate control, and interrupt capability via KBI or IRQ modules.

Is the S9KEAZN8AMFKR pin-compatible with other KEA8 family members?

No, the S9KEAZN8AMFKR is not pin-compatible with other KEA8 variants in different packages (e.g., TSSOP-16 or QFN-32). Its 24-pin QFN layout is unique to the FK package option. Pin assignments for PTA/PTB/PTC banks, peripheral multiplexing, and power/ground distribution follow the QFN-24 mechanical and electrical specifications defined in the S9KEA8P44M48SF0 datasheet. Migration to another package requires PCB redesign and signal routing validation-even within the same KEA8 sub-family.