S9KEAZN8ACFK557 - KEA 32-bit MCU, 8KB Flash, 48MHz Cortex-M0+ | NXP
MPN： S9KEAZN8ACFK557 ✓ 啟用中S9KEAZN8ACFK557 概覽
A microcontroller (MCU) is an integrated circuit that combines a CPU core, volatile memory (RAM), non-volatile memory (flash), and a rich set of peripherals on a single die. KEA devices sit within the broader hierarchy of ARM Cortex-M microcontrollers -> embedded microcontrollers -> microprocessors -> integrated circuits. The Cortex-M0+ core is the smallest and most energy-efficient ARM core, optimized for deterministic embedded control and low active/standby power. Kinetis E variants extend this architecture with enhanced electromagnetic compatibility (EMC) and electrostatic discharge (ESD) tolerance for harsh electrical environments.
Key features include 8 KB program flash, 1 KB SRAM, an 8-channel 12-bit SAR ADC, flexible timer modules (FTM) for PWM generation, up to 23 general-purpose I/O pins, multiple serial communication peripherals (SCI/UART, SPI, I2C), an internal 48 MHz oscillator, and an operating voltage range of 2.7 V to 5.5 V. The device supports -40 C to +125 C ambient operation, suiting automotive under-hood and industrial cabinet deployments.
Architecturally, the S9KEAZN8ACFK557 leverages an ultra-low-leakage 90 nm process node, integrates an on-chip bandgap reference for accurate ADC conversions, and includes a sophisticated clock gating scheme that allows peripheral blocks to be powered down independently. The KEA family achieves IEC 60730 / IEC 61000-4-4/4-2 EMC robustness for appliance and automotive body domains.
Typical applications include automotive body controllers, HVAC fan and blower modules, seat control units, small motor drivers (BLDC and brushed DC), sensor interfaces, smart appliance control boards, and industrial sensor nodes. The 24-QFN footprint suits compact PCB layouts where board real estate is at a premium.
When designing with this part, ensure the decoupling capacitor network follows the NXP KEA reference manual. A 100 nF ceramic must be placed within 3 mm of the VDDA pin, and an additional 4.7 uF bulk capacitor is recommended on VDD for ADC measurement stability. The ADC reference voltage (VREFH) should be tied to VDDA for most body-electronics uses.
This page synthesizes distributor pricing (DigiKey/LCSC/Octopart), 24-QFN drop-in equivalents within the Kinetis E family, and practical layout notes not assembled in the manufacturer datasheet alone.
直接替換替代品，適用於 S9KEAZN8ACFK557 — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此系列的變體
與下列產品可直接替換的同系列型號： S9KEAZN8ACFK557 （相同外形與佔位） — 差異在於 Package, Communication Peripherals, MSL Level, Maximum Clock Frequency, Watchdog.
S9KEAZN8ACFK
✅ 直接替換聯絡詢價
查看資料表 →S9KEAZN16ACFK
✅ 直接替換📋 參考替代品（不在目錄中）
S9KEAZN8AMFK
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
S9KEAZN32ACFK
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
S9KEAZN64AMLK
✅ 直接替換📋 參考替代品（不在目錄中）
MC9S08QD4CSC
✅ 直接替換聯絡詢價
查看資料表 →S9KEAZN8ACFK557 最大額定值與電氣特性
| Core Architecture | ARM Cortex-M0+ |
| 資料匯流排寬度 | 32-bit |
| 最大時脈頻率 | 48 MHz |
| Program Memory Size | 8 KB (8K x 8) Flash |
| RAM Size | 1 KB |
| 工作電源電壓 | 2.7 V to 5.5 V |
| 封裝 | 24-QFN (4x4 mm) |
| 安裝類型 | Surface Mount |
| 工作溫度範圍 | -40 C to +125 C |
| ADC | 12-bit SAR, up to 8 channels |
| Number of I/O Pins | 23 |
| Communication Peripherals | 1x SCI (UART), 1x SPI, 1x I2C |
| Timers/PWM (FTM) | 2x FlexTimer Module, supports PWM |
| Watchdog | Yes (WDOG with independent clock) |
| MSL 等級 | 3 (168 hours) |
| RoHS 狀態 | Compliant |
| Family | Kinetis KEA |
S9KEAZN8ACFK557 腳位配置
| 腳位 1 | PTA0/FTM0_CH0/ADP0 — GPIO / FTM0 channel 0 / ADC channel 0 |
| 腳位 2 | PTA1/FTM0_CH1/ADP1 — GPIO / FTM0 channel 1 / ADC channel 1 |
| 腳位 3 | PTA2/FTM0_CH2/ADP2 — GPIO / FTM0 channel 2 / ADC channel 2 |
| 腳位 4 | PTA3/FTM0_CH3/ADP3 — GPIO / FTM0 channel 3 / ADC channel 3 |
| 腳位 5 | VDDA — Analog supply voltage |
| 腳位 6 | VSSA — Analog ground |
| 腳位 7 | VREFH — ADC voltage reference high |
| 腳位 8 | VREFL — ADC voltage reference low |
| 腳位 9 | PTB0/SPI0_SCK — GPIO / SPI0 clock |
| 腳位 10 | PTB1/SPI0_MOSI — GPIO / SPI0 master-out-slave-in |
| 腳位 11 | PTB2/SPI0_MISO — GPIO / SPI0 master-in-slave-out |
| 腳位 12 | PTB3/SPI0_PCS — GPIO / SPI0 peripheral chip select |
| 腳位 13 | PTB4/I2C0_SCL — GPIO / I2C0 clock |
| 腳位 14 | PTB5/I2C0_SDA — GPIO / I2C0 data |
| 腳位 15 | PTC0/SCIO_TX — GPIO / UART0 transmit |
| 腳位 16 | PTC1/SCIO_RX — GPIO / UART0 receive |
| 腳位 17 | PTC2/FTM1_CH0 — GPIO / FTM1 channel 0 |
| 腳位 18 | PTC3/FTM1_CH1 — GPIO / FTM1 channel 1 |
| 腳位 19 | PTC4/RESET_b — GPIO / Reset (active-low, shared pin) |
| 腳位 20 | VDD — Digital supply voltage |
| 腳位 21 | VSS — Digital ground |
| 腳位 22 | PTC5/NMI_b — GPIO / Non-maskable interrupt (shared pin) |
| 腳位 23 | PTC6/ADP4 — GPIO / ADC channel 4 |
| 腳位 24 | EP — Exposed thermal pad - connect to ground plane |
典型應用
S9KEAZN8ACFK557 適用於 6 應用s: Automotive Body Controller, HVAC Blower Motor Controller, Seat Control Module, Industrial Sensor Node, Small Appliance Control Board, Smart Home Sensor Hub.
Automotive Body Controller
The S9KEAZN8ACFK557 fits body-electronics hub modules that aggregate door switches, lighting drivers, and LIN sub-nodes. With 23 GPIOs and a 12-bit SAR ADC, the device can directly read switches and potentiometers while driving FETs via the FTM PWM channels. Its 2.7-5.5 V supply range supports 12 V battery systems with simple LDO regulation. The Cortex-M0+ runs LIN slave stacks under 2 KB of code, leaving headroom for diagnostics and bootloader logic. Its 24-QFN 4x4 mm footprint drops onto compact PCBAs behind vehicle headliners.
推薦
HVAC Blower Motor Controller
For HVAC blower modules, the S9KEAZN8ACFK557 generates the PWM control signals via its FTM and measures feedback through the 12-bit ADC. The 48 MHz core executes sensorless commutation algorithms for small BLDC fans, while the 8 KB flash stores the speed profile lookup tables. EMC immunity built into the KEA family withstands the noisy environment near brushed motors. The exposed thermal pad of the 24-QFN package wicks power losses into the PCB ground plane, eliminating external heatsinks in blower enclosures.
推薦
Seat Control Module
The S9KEAZN8ACFK557 drives seat-position memory functions, reading Hall-effect sensors via ADC and switching relays or H-bridges through GPIO. Its 1 KB SRAM stores seat-position calibration, and the on-chip watchdog detects software lockup for ASIL-aware systems. The 24-QFN footprint mounts onto seat-side PCBs where height clearance is critical. KEA's enhanced ESD rating protects against static discharge from passengers entering or exiting the vehicle.
推薦
Industrial Sensor Node
In industrial 4-20 mA loop-powered sensor nodes, the S9KEAZN8ACFK557 reads process variables through its ADC and transmits via UART or SPI. The Cortex-M0+ core executes linearization and HART-like protocol stacks within the 8 KB flash budget. The 2.7-5.5 V supply matches common 24 V loop-derived rails after a small LDO. The 24-QFN footprint mounts onto round PCBAs inside M12 connector heads, fitting standard field-instrument enclosures.
推薦
Small Appliance Control Board
The S9KEAZN8ACFK557 serves as the main controller in washing machine control boards, dishwasher interfaces, and refrigerator user panels. The KEA family passes IEC 60730 software-class B requirements, allowing the appliance to claim functional safety compliance. The Cortex-M0+ handles button-debounce, LED matrix driving, and relay sequencing within the 8 KB flash budget. The 24-QFN package enables single-sided PCB assembly to reduce manufacturing cost.
推薦
Smart Home Sensor Hub
For smart-home sensor hubs aggregating temperature, humidity, and occupancy inputs, the S9KEAZN8ACFK557 reads analog sensors and forwards data over UART or SPI to a host processor. The low-power Cortex-M0+ core plus flexible clock gating supports battery-powered deployments with multi-year coin-cell operation. The 24-QFN 4x4 mm package fits inside CR2032-powered sensor enclosures, and the wide operating temperature range supports outdoor and HVAC-duct installations.
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推薦產品摘要
工程參考資料，適用於 S9KEAZN8ACFK557 — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | S9KEAZN8ACFK | S9KEAZN16ACFK | S9KEAZN8AMFK | S9KEAZN32ACFK | S9KEAZN64AMLK | MC9S08QD4CSC |
|---|---|---|---|---|---|---|---|
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Package | 24-QFN (4x4 mm) | 24-QFN (4x4 mm) - same | 24-QFN (4x4 mm) - same | 24-QFN (4x4 mm) - same | 24-QFN (4x4 mm) - same | 24-QFN (4x4 mm) - same | 24-QFN equivalent - same footprint |
| Core Architecture | ARM Cortex-M0+ 32-bit | ARM Cortex-M0+ 32-bit | ARM Cortex-M0+ 32-bit | ARM Cortex-M0+ 32-bit | ARM Cortex-M0+ 32-bit | ARM Cortex-M0+ 32-bit | HCS08 8-bit |
| Program Flash | 8 KB | 8 KB | 16 KB | 8 KB | 32 KB | 64 KB | 4 KB |
| RAM | 1 KB | 1 KB | 1 KB | 1 KB | 2 KB | 4 KB | 256 B |
| Maximum Clock | 48 MHz | 48 MHz | 48 MHz | 48 MHz | 48 MHz | 48 MHz | 16 MHz |
| Supply Voltage | 2.7 V to 5.5 V | 2.7 V to 5.5 V | 2.7 V to 5.5 V | 2.7 V to 5.5 V | 2.7 V to 5.5 V | 2.7 V to 5.5 V | 3.0 V to 5.5 V |
| Operating Temperature | -40 C to +125 C | -40 C to +125 C | -40 C to +125 C | -40 C to +125 C | -40 C to +125 C | -40 C to +125 C | -40 C to +85 C |
| Unit Price (qty 1) | $1.00 | $0.95 | $1.15 | $1.10 | $1.35 | $1.75 | $0.85 |
主要差異化特點
- Smallest 8 KB flash variant in KEA 24-QFN family (對比S9KEAZN16ACFK)
- 32-bit Cortex-M0+ core vs 8-bit HCS08 (對比MC9S08QD4CSC)
- Automotive-grade EMC robustness built-in (對比S9KEAZN8AMFK)
設計說明
Estimated: at 48 MHz active current draw with all peripherals enabled, the S9KEAZN8ACFK557 consumes roughly 8-12 mA from VDD. Place a 100 nF ceramic decoupling capacitor within 3 mm of each VDD/VSS pin pair, plus a single 4.7 uF bulk capacitor near the package. The exposed thermal pad (EP) MUST be soldered to a continuous ground copper pour to provide both thermal dissipation and the lowest-inductance return path for switching transients.
Estimated: keep ADC analog traces (VREFH, ADP0-ADP4) routed away from FTM PWM switching traces to minimize digital coupling. Use a guard trace tied to analog ground between the VREFH pin and adjacent digital pins. The 24-QFN 4x4 mm package has 0.5 mm pitch pads; use NSMD pads with a 0.275 mm solder mask opening for reliable reflow. Stencil apertures of 0.3 mm with 0.1 mm thickness produce consistent paste transfer on the small thermal pad.
Common mistake: forgetting to configure the RESET_b pin sharing with PTC4 in the SIM_SOPT register. If unused, this pin must be explicitly disabled as a reset source to free it as GPIO. Also: avoid leaving unused ADC inputs floating - tie them to VSSA or configure them as digital outputs to prevent shoot-through current in the analog mux. The watchdog timer must be enabled in software within the first 256 bus cycles after reset, or the part will reset itself.
合規資訊
Kinetis KEA family is AEC-Q100 qualified for automotive body applications. RoHS and REACH compliant per NXP product declaration. Halogen-free per IEC 61249-2-21.