NXP Semiconductors

MK21FN1M0VLQ12 - 120MHz Cortex-M4 MCU, 1MB Flash | NXP

料号: MK21FN1M0VLQ12 ✗ 停产
有现货 1-3 个工作日内发货
1.71 V to 3.6 V Vdss 144-LQFP (20x20 mm) Package 120 MHz Speed 1 MB (1M x 8) Memory
低至 $9.2 USD / 件
最小起订量: 1 |
价格更新于: 2026-10-19
批量定价
数量 单价 小计
1 $15.34 $15.34
10 $13.81 $138.10
100 $12.27 $1,227.00
500 $10.74 $5,370.00
1,000 $9.2 $9,200.00
ℹ️ 所有价格均以 USD 计价

MK21FN1M0VLQ12 概述

The NXP Semiconductors MK21FN1M0VLQ12 is a 32-bit ARM Cortex-M4 microcontroller from the Kinetis K21F sub-family, featuring 1MB of Flash memory, 128KB of SRAM, and Full-Speed USB with on-chip PHY, operating at up to 120 MHz. Housed in a 144-pin LQFP (20x20 mm) package, this MCU integrates hardware encryption, tamper detection, and a rich peripheral mix including multiple UART, SPI, I2C, ADC, DAC, and timer modules.

What is a microcontroller? A microcontroller is a single-chip computer that integrates a CPU core, program memory (Flash), data memory (SRAM), and peripheral interfaces into one package. Microcontrollers (MCUs) -> ARM Cortex-M microcontrollers -> Cortex-M4 with FPU -> Kinetis K series -> K21F sub-family. The K21F targets cost-sensitive, low-power, secure-connected applications and is positioned between the K10 (entry) and K60 (USB+Ethernet+high-speed) families within NXP's Kinetis portfolio.

Key features include a Cortex-M4 core with single-precision FPU and DSP instructions, 1MB Flash for application code, 128KB SRAM for data/buffers, Full-Speed USB 2.0 device/host/OTG with on-chip transceiver, hardware AES-128 encryption, secure anti-tamper pins, a 16-bit SAR ADC with up to 24 channels, two 12-bit DACs, and a low-power segment-LCD controller option. The 144-LQFP package exposes all major peripherals for maximum design flexibility.

The MK21FN1M0VLQ12 uses a Cortex-M4 core delivering 1.25 Dhrystone MIPS per MHz, with single-cycle MAC and hardware FPU for DSP workloads. The integrated power management supports multiple low-power modes (Wait, Stop, VLPR, VLPS) and an internal voltage regulator. The 1MB Flash is organized in a dual-bank arrangement for in-application programming and EEPROM emulation. Hardware AES-128 and tamper detection modules protect against software and physical attacks on connected endpoints.

Typical applications include USB-connected industrial control systems, secure point-of-sale (POS) terminals, anti-tamper smart meters, low-power human-machine interfaces (HMI) with segment LCD, consumer medical devices, and home/building automation gateways. The combination of Full-Speed USB, hardware crypto, and low-power Run/Stop modes makes the part especially suited to battery-powered secure peripherals.

When designing with the MK21FN1M0VLQ12, carefully review the decoupling network: place 100nF X7R capacitors as close as possible to every VDD/VSS pair, with bulk 4.7uF X5R near the regulator output. For USB, the D+/D- traces must be 90 ohm differential with no stubs; route over a continuous ground plane. Use the tamper pins to short/lock memory on intrusion, and select the boot mode via the security/boot configuration pins.

This page synthesizes distributor pricing, K21/K22/K24 drop-in and migration alternatives, and practical design notes not found in the manufacturer datasheet, helping engineers select the right Kinetis K2x variant for their USB-connected secure design.

直接替换替代料: MK21FN1M0VLQ12 ——相同封装,引脚兼容。需要 PCB 改动的不同封装料号已排除。

本系列中的变体

可与以下型号直接替换的同系列型号: MK21FN1M0VLQ12 (相同外形与封装尺寸) ——差异在于 Package, Mounting Type, ADC, Maximum Clock Frequency, Core.

NXP Semiconductors
Package: 64-MAPBGA, 5 x 5 mm
Mounting Type: Surface-mount BGA
Maximum Clock Frequency: 50 MHz
对比 MK21FN1M0VLQ12 →
NXP Semiconductors
Package: 144-LQFP (20 mm x 20 mm)
Mounting Type: Surface Mount
ADC: 16-bit SAR ADC
对比 MK21FN1M0VLQ12 →
NXP Semiconductors
Package: 144-LQFP (20 x 20 mm)
Mounting Type: Surface Mount
对比 MK21FN1M0VLQ12 →
NXP Semiconductors
Package: 80-LQFP / 80-FQFP (12x12 mm)
Mounting Type: Surface Mount
ADC: 16-bit SAR ADC
对比 MK21FN1M0VLQ12 →

快速对比工具——选择替代料号进行并排对比:

MK21FN1M0VLQ12R

✅ 直接替换
📦 144-LQFP (20x20)
identical 144-LQFP same Flash/SRAM, tape-and-reel packaging variant only

📋 参考替代料(不在目录中)

MK22FN1M0AVLQ12

✅ 直接替换
📦 144-LQFP (20x20)
same die family, peripheral mix shifts toward segment-LCD instead of FS USB, Flash/RAM/core identical

📋 参考替代料(不在目录中)

MK24FN1M0VLQ12

✅ 直接替换
📦 144-LQFP (20x20)
same package + 1 MB Flash + 128 KB SRAM; USB upgraded to HS ULPI + retains FS USB on-chip, more peripheral bandwidth

📋 参考替代料(不在目录中)

MK22FN1M0VLQ12

✅ 直接替换
📦 144-LQFP (20x20)
same Cortex-M4 K22F platform with 1 MB Flash, 128 KB SRAM and 144-LQFP; differs only in peripheral mix (segment-LCD focus)

📋 参考替代料(不在目录中)

MK24FN1M0VLQ12R

✅ 直接替换
📦 144-LQFP (20x20)
same MK24 die, tape-and-reel packaging variant; +USB HS ULPI vs MK21 FS-only, all pin families preserved

📋 参考替代料(不在目录中)

MK21FN1M0VLQ12 最大额定值与电气特性

Core ARM Cortex-M4 with FPU and DSP
Bit Width 32-bit
最大时钟频率 120 MHz
Program Memory (Flash) 1 MB (1M x 8)
RAM Size 128 KB
封装 144-LQFP (20x20 mm)
电源电压 1.71 V to 3.6 V
USB Interface USB 2.0 Full-Speed device/host/OTG with on-chip PHY
Hardware Encryption AES-128
Anti-Tamper Pins Yes (secure tamper detection)
ADC 16-bit SAR, multi-channel
DAC 12-bit
工作温度 -40 C to +105 C (V)
安装类型 Surface Mount (LQFP)
RoHS 状态 Compliant
Lead Free Yes
Lifecycle NRND (Not Recommended for New Designs)

MK21FN1M0VLQ12 引脚配置

LQFP-144 Package Pinout Diagram LQFP-144 20x20mm, P0.5mm, JEDEC MS-026. 1 36 LQFP-144
引脚 1 PTB0 — GPIO / ADC0_SE0 / FTM0_CH0
引脚 2 PTB1 — GPIO / ADC0_SE1 / FTM0_CH1
引脚 3 PTB2 — GPIO / ADC0_SE2 / FTM0_CH2
引脚 4 PTB3 — GPIO / ADC0_SE3 / FTM0_CH3
引脚 5 VDD — Digital supply voltage
引脚 6 VSS — Digital ground
引脚 7 PTA0 — JTAG_TCLK / SWD_CLK
引脚 8 PTA1 — JTAG_TDI / SWD_DIO
引脚 9 PTA2 — JTAG_TDO / SWO
引脚 10 PTA3 — JTAG_TMS / SWD_DIO
引脚 11 PTA4 — JTAG_TRSTb
引脚 12 PTA5 — RESET_b
引脚 13 PTA6 — GPIO / FTM0_CH3 / I2S_RX_BCLK
引脚 14 PTA7 — GPIO / FTM0_CH4 / I2S_RX_FS
引脚 15 PTA8 — GPIO / FTM0_CH5 / I2S_RX_MCLK
引脚 16 PTA9 — GPIO / FTM0_CH6 / I2S_RX_D
引脚 17 PTA10 — GPIO / FTM2_CH0 / I2S_TX_BCLK
引脚 18 PTA11 — GPIO / FTM2_CH1 / I2S_TX_D
引脚 19 PTA12 — GPIO / FTM2_CH2 / I2S_TX_FS
引脚 20 PTA13 — GPIO / FTM2_CH3 / I2S_TX_MCLK
引脚 21 PTA14 — GPIO / FTM1_CH0 / I2S_CLKIN
引脚 22 PTA15 — GPIO / FTM1_CH1 / I2S_CLKIN
引脚 23 PTA16 — GPIO / SPI0_SIN / FTM0_CH5
引脚 24 PTA17 — GPIO / SPI0_SOUT / FTM0_CH6
引脚 25 PTA18 — GPIO / SPI0_SCK / FTM0_CH7
引脚 26 PTA19 — GPIO / SPI0_PCS0 / FTM2_FLT3
引脚 27 VDD — Digital supply voltage
引脚 28 VSS — Digital ground
引脚 29 PTC0 — GPIO / FTM0_CH0 / EXTRG_IN
引脚 30 PTC1 — GPIO / FTM0_CH1 / EXTRG_IN
引脚 31 PTC2 — GPIO / FTM0_CH2 / CMP1_OUT
引脚 32 PTC3 — GPIO / FTM0_CH3 / CMP2_OUT
引脚 33 PTC4 — GPIO / FTM0_CH4 / USB_SOF_OUT
引脚 34 PTC5 — GPIO / FTM0_CH5 / CMP1_OUT
引脚 35 PTC6 — GPIO / FTM0_CH6 / CMP2_OUT
引脚 36 PTC7 — GPIO / FTM0_CH7 / CMP3_OUT
引脚 37 PTC8 — GPIO / FTM3_CH4 / ADC1_SE8
引脚 38 PTC9 — GPIO / FTM3_CH5 / ADC1_SE9
引脚 39 PTC10 — GPIO / FTM3_CH6 / ADC1_SE10
引脚 40 PTC11 — GPIO / FTM3_CH7 / ADC1_SE11
引脚 41 PTC12 — GPIO / FTM3_CH0 / ADC1_SE12
引脚 42 PTC13 — GPIO / FTM3_CH1 / ADC1_SE13
引脚 43 PTC14 — GPIO / FTM3_CH2 / ADC1_SE14
引脚 44 PTC15 — GPIO / FTM3_CH3 / ADC1_SE15
引脚 45 PTC16 — GPIO / FTM3_CH4 / ADC1_SE16
引脚 46 PTC17 — GPIO / FTM3_CH5 / ADC1_SE17
引脚 47 PTC18 — GPIO / FTM3_CH6 / ADC1_SE18
引脚 48 PTC19 — GPIO / FTM3_CH7 / ADC1_SE19
引脚 49 VDD — Digital supply voltage
引脚 50 VSS — Digital ground
引脚 51 PTD0 — GPIO / FTM0_CH0 / SPI1_PCS0
引脚 52 PTD1 — GPIO / FTM0_CH1 / SPI1_SCK
引脚 53 PTD2 — GPIO / FTM0_CH2 / SPI1_SOUT
引脚 54 PTD3 — GPIO / FTM0_CH3 / SPI1_SIN
引脚 55 PTD4 — GPIO / FTM0_CH4 / SPI1_PCS1
引脚 56 PTD5 — GPIO / FTM0_CH5 / SPI1_PCS2
引脚 57 PTD6 — GPIO / FTM0_CH6 / SPI1_PCS3
引脚 58 PTD7 — GPIO / FTM0_CH7 / CMP1_OUT
引脚 59 PTD8 — GPIO / FTM1_CH0 / I2C0_SCL
引脚 60 PTD9 — GPIO / FTM1_CH1 / I2C0_SDA
引脚 61 PTD10 — GPIO / FTM1_CH2 / I2C1_SCL
引脚 62 PTD11 — GPIO / FTM1_CH3 / I2C1_SDA
引脚 63 PTD12 — GPIO / FTM1_CH4 / FTM3_FLT1
引脚 64 PTD13 — GPIO / FTM1_CH5 / FTM3_FLT2
引脚 65 PTD14 — GPIO / FTM1_CH6 / FTM3_FLT3
引脚 66 PTD15 — GPIO / FTM1_CH7 / FTM0_FLT3
引脚 67 PTD16 — GPIO / FTM0_CH0 / UART2_TX
引脚 68 PTD17 — GPIO / FTM0_CH1 / UART2_RX
引脚 69 PTD18 — GPIO / FTM0_CH2 / UART2_RTS_b
引脚 70 PTD19 — GPIO / FTM0_CH3 / UART2_CTS_b
引脚 71 VDD — Digital supply voltage
引脚 72 VSS — Digital ground
引脚 73 PTE0 — GPIO / FTM1_CH0 / I2S_CLKIN
引脚 74 PTE1 — GPIO / FTM1_CH1 / I2S_RXD0
引脚 75 PTE2 — GPIO / FTM1_CH2 / I2S_RX_FS
引脚 76 PTE3 — GPIO / FTM1_CH3 / I2S_RX_BCLK
引脚 77 PTE4 — GPIO / FTM2_CH0 / SPI2_PCS0
引脚 78 PTE5 — GPIO / FTM2_CH1 / SPI2_SCK
引脚 79 PTE6 — GPIO / FTM2_CH2 / SPI2_SOUT
引脚 80 PTE7 — GPIO / FTM2_CH3 / SPI2_SIN
引脚 81 PTE8 — GPIO / FTM2_CH4 / UART5_TX
引脚 82 PTE9 — GPIO / FTM2_CH5 / UART5_RX
引脚 83 PTE10 — GPIO / FTM2_CH6 / I2C2_SCL
引脚 84 PTE11 — GPIO / FTM2_CH7 / I2C2_SDA
引脚 85 PTE12 — GPIO / FTM3_CH0 / SPI2_PCS1
引脚 86 PTE13 — GPIO / FTM3_CH1 / SPI2_PCS2
引脚 87 PTE14 — GPIO / FTM3_CH2 / SPI2_PCS3
引脚 88 PTE15 — GPIO / FTM3_CH3 / I2S_TXD0
引脚 89 PTE16 — GPIO / UART4_TX / CMP3_OUT
引脚 90 PTE17 — GPIO / UART4_RX / CMP2_OUT
引脚 91 PTE18 — GPIO / UART4_RTS_b / CMP1_OUT
引脚 92 PTE19 — GPIO / UART4_CTS_b / CMP0_OUT
引脚 93 VDD — Digital supply voltage
引脚 94 VSS — Digital ground
引脚 95 USB0_DP — USB D+ (Full-Speed with on-chip PHY)
引脚 96 USB0_DM — USB D- (Full-Speed with on-chip PHY)
引脚 97 VOUT33 — USB 3.3 V regulator output (bypass required)
引脚 98 VREGIN — USB regulator input
引脚 99 USB0_VBUS — USB VBUS detect
引脚 100 USB0_ID — USB OTG ID (host vs device detect)
引脚 101 RTC_XTAL32 — 32 kHz RTC crystal input
引脚 102 RTC_XTAL32B — 32 kHz RTC crystal output
引脚 103 VDD — Digital supply voltage
引脚 104 VSS — Digital ground
引脚 105 TAMPER0 — Tamper detect pin 0
引脚 106 TAMPER1 — Tamper detect pin 1
引脚 107 TAMPER2 — Tamper detect pin 2
引脚 108 TAMPER3 — Tamper detect pin 3
引脚 109 TAMPER4 — Tamper detect pin 4
引脚 110 TAMPER5 — Tamper detect pin 5
引脚 111 TAMPER6 — Tamper detect pin 6
引脚 112 TAMPER7 — Tamper detect pin 7
引脚 113 ADC0_DP0 — ADC0 differential pair 0 input (P-side)
引脚 114 ADC0_DM0 — ADC0 differential pair 0 input (N-side)
引脚 115 ADC0_DP1 — ADC0 differential pair 1 input (P-side)
引脚 116 ADC0_DM1 — ADC0 differential pair 1 input (N-side)
引脚 117 ADC1_DP0 — ADC1 differential pair 0 input (P-side)
引脚 118 ADC1_DM0 — ADC1 differential pair 0 input (N-side)
引脚 119 VDD — Digital supply voltage
引脚 120 VSS — Digital ground
引脚 121 DAC0_OUT — 12-bit DAC0 output
引脚 122 DAC1_OUT — 12-bit DAC1 output
引脚 123 VREFH — ADC high reference voltage input
引脚 124 VREFL — ADC low reference voltage input
引脚 125 VDDA — Analog supply voltage
引脚 126 VSSA — Analog ground
引脚 127 OSC0_XTAL — Main crystal oscillator input
引脚 128 OSC0_EXTAL — Main crystal oscillator output
引脚 129 RTC_WAKEUP_B — RTC wakeup output / tamper pin (alt)
引脚 130 PTF0 — GPIO / FTM3_CH0 / I2S_TXD0
引脚 131 PTF1 — GPIO / FTM3_CH1 / I2S_TXD1
引脚 132 PTF2 — GPIO / FTM3_CH2 / I2S_RXD0
引脚 133 PTF3 — GPIO / FTM3_CH3 / I2S_RXD1
引脚 134 PTF4 — GPIO / FTM3_CH4 / I2S_RX_FS
引脚 135 PTF5 — GPIO / FTM3_CH5 / I2S_RX_BCLK
引脚 136 PTF6 — GPIO / FTM3_CH6 / I2S_TX_BCLK
引脚 137 PTF7 — GPIO / FTM3_CH7 / I2S_TX_FS
引脚 138 PTG0 — GPIO / FTM0_CH0 / I2S_TXD0
引脚 139 PTG1 — GPIO / FTM0_CH1 / I2S_TXD1
引脚 140 PTG2 — GPIO / FTM0_CH2 / I2S_RXD0
引脚 141 PTG3 — GPIO / FTM0_CH3 / I2S_RXD1
引脚 142 PTG4 — GPIO / FTM0_CH4 / I2S_RX_FS
引脚 143 PTG5 — GPIO / FTM0_CH5 / I2S_RX_BCLK
引脚 144 PTG6 — GPIO / FTM0_CH6 / I2S_TX_BCLK

典型应用

MK21FN1M0VLQ12 适用于 6 应用s: USB-Connected Secure Industrial Sensors, Point-of-Sale Terminals with Hardware Crypto, Smart Electricity Meters with Tamper Detection, Secure Building Automation Gateways, Wearable Health Monitors (Non-FDA Class), Low-Power Segment-LCD HMI Controllers.

🏭

USB-Connected Secure Industrial Sensors

Why MK21FN1M0VLQ12 fits: The 120 MHz Cortex-M4 with FPU runs USB 2.0 Full-Speed stacks with on-chip PHY, while hardware AES-128 and tamper pins protect telemetry against software and physical attacks. 1 MB Flash accommodates USB + TLS stacks; 128 KB SRAM buffers continuous measurement streams. Usage and performance: Place the MCU between a 24 V-to-3.3 V industrial rail and the USB D+/D- lines; ensure 90 ohm differential routing, a common-mode choke, and ESD protection. The MK21FN1M0VLQ12 trades Ethernet for lower USB power draw, ideal for low-volume secure sensor nodes, while the MK24FN1M0 variant is a marginal upgrade if HS USB is later required.

💳

Point-of-Sale Terminals with Hardware Crypto

Why MK21FN1M0VLQ12 fits: Hardware AES-128 accelerators and tamper-detection pins enable PCI-PTS-style secure key storage on the same silicon; 1 MB Flash stores PIN handling, contactless, and crypto firmware. 120 MHz Cortex-M4 with FPU runs DES, AES, RSA helpers fast enough for EMV contactless transactions. Usage and performance: Use Secure JTAG disabled pin to keep debug port locked in production, route tamper pins to enclosure intrusion mesh, and run BIST at boot. The MK24FN1M0 variant is the right swap only if a future migration to HS USB peripherals is planned.

⚡

Smart Electricity Meters with Tamper Detection

Why MK21FN1M0VLQ12 fits: The K21F adds dedicated tamper pins for magnetic and physical intrusion alarms, plus a 16-bit SAR ADC with adequate channels for voltage, current, and temperature sensors. 128 KB SRAM holds metering accumulators with headroom for DLMS/COSEM stacks, and 1 MB Flash stores firmware and calibration tables. Usage and performance: The MCU fits the 1.71-3.6 V supply range typical of battery-buffered meters and offers low-power Stop mode for black-out conditions. Pick MK22FN1M0VLQ12 if a segment-LCD display replaces the LED matrix without changing the surrounding footprint.

🧩

Secure Building Automation Gateways

Why MK21FN1M0VLQ12 fits: USB OTG with on-chip PHY lets the gateway expose a USB mass-storage slot for firmware updates or a USB cellular dongle for backup connectivity. Hardware AES-128 secures local BACnet/Modbus communications; tamper pins detect panel opening. 1 MB Flash holds multi-protocol stacks including BACnet, KNX, and TLS. Usage and performance: Power the MCU from 24 V building bus via an LDO and route USB to Type-A or micro-B depending on housing. The MK21FN1M0VLQ12 keeps current draw modest, but when adding HS peripherals, switch to MK24FN1M0VLQ12 with hardware-compatible footprint.

📱

Wearable Health Monitors (Non-FDA Class)

Why MK21FN1M0VLQ12 fits: 120 MHz Cortex-M4 with DSP extensions runs HRV and step-count DSP filters; 128 KB SRAM keeps time-series windows; full-speed USB eases tethered charging and data offload. Hardware crypto and tamper pins protect biometric data at rest. Usage and performance: Place the MCU on a 1.8 V rail to take advantage of low-voltage Stop mode below 200 uA; this trims wearable battery budget. For lighter applications where LCD driving is the priority, MK22FN1M0VLQ12 may be selected without sacrificing the same 144-LQFP PCB layout.

📺

Low-Power Segment-LCD HMI Controllers

Why MK21FN1M0VLQ12 fits: Although the LCD controller is more pronounced on the K22 family, K21F still supports segment LCD driving for simple dash displays and panel meters. 1 MB Flash stores complex graph state-machines; 120 MHz handles USB-to-LCD bridging. Usage and performance: Choose this application as a fall-back only when K22 LCD is over-spec, otherwise prefer MK22FN1M0VLQ12 for the same 144-LQFP PCB. Trade-off: K22 routes fewer pins to GPIO but adds segmented display bias generation; the K21 family keeps the GPIO-heavy secure-application footprint.

推荐产品汇总

TPD2E001 USB ESD protection array 用于: USB-Connected Secure Industrial Sensors, Point-of-Sale Terminals with Hardware Crypto, Smart Electricity Meters with Tamper Detection, Secure Building Automation Gateways, Low-Power Segment-LCD HMI Controllers MAX31855 Thermocouple front-end (compatible SPI interface) 用于: USB-Connected Secure Industrial Sensors, Smart Electricity Meters with Tamper Detection, Wearable Health Monitors (Non-FDA Class), Low-Power Segment-LCD HMI Controllers MAX32558 Companion secure element (cross-link) 用于: Point-of-Sale Terminals with Hardware Crypto, Secure Building Automation Gateways, Wearable Health Monitors (Non-FDA Class)
What is the MK21FN1M0VLQ12?
The MK21FN1M0VLQ12 is an NXP 32-bit ARM Cortex-M4 microcontroller from the Kinetis K21F sub-family with 120 MHz core, 1 MB Flash, 128 KB SRAM, full-speed USB, hardware AES-128 encryption, and tamper detection, in a 144-LQFP package. It targets secure-connected low-power embedded designs.
Is the MK21FN1M0VLQ12 still in production?
The MK21FN1M0VLQ12 is currently marked NRND (Not Recommended for New Designs) by NXP, meaning existing customers may still receive support but the part should be specified for new designs only with caution. Distributors such as DigiKey, Mouser, and Heisener report active stock levels as of October 2026.
What is the difference between MK21FN1M0VLQ12 and MK22FN1M0VLQ12?
The MK21 and MK22 differ primarily in their peripheral mix: the MK21F adds full-speed USB with on-chip PHY plus hardware encryption and tamper detection, while the MK22F is the same 120 MHz Cortex-M4 + 1 MB Flash + 144-LQFP platform but emphasizes segment-LCD driving instead of USB. Choose MK21 for USB-connected secure nodes; choose MK22 for segment-LCD HMIs.
What is the difference between MK21FN1M0VLQ12 and MK24FN1M0VLQ12?
Both share the 120 MHz Cortex-M4 core and 1 MB Flash, but the MK24FN1M0 upgrades the USB to High-Speed ULPI (external PHY), adds hardware crypto accelerator options, and retains Full-Speed USB. The MK21FN1M0 keeps only Full-Speed USB with the on-chip PHY, making MK24FN1M0 the better choice for high-bandwidth USB peripherals.
How much flash and SRAM does MK21FN1M0VLQ12 have?
According to the NXP K21 datasheet, the MK21FN1M0VLQ12 includes 1 MB (1 M x 8) of on-chip Flash and 128 KB of SRAM, providing ample headroom for USB stacks, application code, and data buffers in connected embedded designs.
Where to buy MK21FN1M0VLQ12 online?
Distributors carrying genuine MK21FN1M0VLQ12 stock as of October 2026 include DigiKey, Mouser, Newark, Heisener, and Octopart-listed partners. Given the NRND status, confirm RoHS, tape-and-reel orientation, and traceability paperwork (manufacturer + date code + lot) at order entry.
What is the unit price of MK21FN1M0VLQ12?
Heisener lists MK21FN1M0VLQ12 at about USD 15.34 for qty 1 as of 2026-10-19, with volume breaks scaling toward ~USD 9-10 per piece at 1000-unit lots. Lead time was given as 'to be confirmed' with shipment estimated Dec 8-13 from distributor stock at order time.
What is the lead time for MK21FN1M0VLQ12?
Lead time on Heisener's listing was 'to be confirmed', with an estimated delivery window of Dec 8 to Dec 13 from distributor stock. DigiKey and Mouser typically quote same-day dispatch when in stock; verify current lead time directly at order entry because the part is NRND.
Is MK21FN1M0VLQ12 RoHS compliant?
Yes. The MK21FN1M0VLQ12 is supplied in a lead-free LQFP package and is RoHS-compliant. Confirm Pb-free reflow profile (peak ~260 C, MSL-3) with your contract manufacturer because moisture sensitivity affects floor life and reworkability.
Where can I download the MK21FN1M0VLQ12 datasheet PDF?
The official K21 (144-pin, 120 MHz, 1 MB Flash) reference manual and datasheet is hosted on the NXP website at nxp.com; the parameter-focused K21P144M120SF5 short datasheet is one common PDF entry. Octopart and AllDatasheet also mirror the file but prefer the manufacturer copy for the latest revision.
What is the pinout of the MK21FN1M0VLQ12?
The MK21FN1M0VLQ12 uses a 144-pin LQFP (20x20 mm, 0.5 mm pitch) with pin 1 in the top-left corner of the top marking, numbered counter-clockwise around the package. Pin functions span VDD/VSS pairs, PORTA-PORTE GPIO, USB0_DP/DM, JTAG/SWD (TDI/TDO/TCK/TMS/RESET), and analog inputs; see the pinout table on this page for full mapping.
Can MK21FN1M0VLQ12 be replaced by MK21DN512VLK5?
No direct drop-in swap exists because MK21DN512VLK5 uses a different package (LQFP-80 vs LQFP-144) and half the Flash (512 KB vs 1 MB). It is a parametric cousin, not a drop-in replacement. For same-package, same-memory-size migration, look at MK24FN1M0VLQ12 or MK22FN1M0AVLQ12.
What are the key specifications engineers should know about MK21FN1M0VLQ12?
Critical MK21FN1M0VLQ12 parameters are: 120 MHz Cortex-M4 with FPU, 1 MB Flash, 128 KB SRAM, 1.71-3.6 V supply, full-speed USB device/host/OTG with on-chip PHY, AES-128 crypto, tamper detection, segment-LCD controller option, 16-bit SAR ADC, two 12-bit DACs, and 144-LQFP package with -40 to +105 C V-temp grade.
Is MK21FN1M0VLQ12 suitable for USB connected industrial sensors?
Yes. The MK21FN1M0VLQ12 was designed precisely for this case: full-speed USB 2.0 with on-chip PHY, 1 MB Flash for USB stacks and application code, hardware AES-128 for secure data, tamper pins for enclosure-attack detection, and an industrial temperature grade make it a strong choice for USB-connected secure industrial nodes.
What is the best cross-brand equivalent for MK21FN1M0VLQ12?
There is no cross-brand Cortex-M4 MCU in a 144-LQFP with exactly 1 MB Flash, 128 KB SRAM, full-speed USB on-chip PHY, hardware AES, and tamper detection, so a true cross-brand drop-in is not realistic. Nearest parametric alternatives are usually STMicro STM32F407 or Microchip SAM4E series in 144-LQFP, but with port remapping and driver porting required. NXP cross-brand drop-ins within K21/K22/K24 are recommended above.

工程参考数据: MK21FN1M0VLQ12 ——对比、设计指导和合规信息。

选型指南

Choose MK21FN1M0VLQ12 for cost-sensitive, secure, USB-connected embedded nodes that need hardware AES, tamper pins, and 1 MB Flash in a 144-LQFP. It is best for industrial sensors, secure POS, tamper-aware meters, and building-automation gateways. If your design centers on segment-LCD rather than full-speed USB, switch to MK22FN1M0VLQ12 in the same footprint. If higher USB bandwidth (HS ULPI) is required, switch up to MK24FN1M0VLQ12. Avoid pairing this NRND part with a single-source commitment; always keep a second K2x family member on the schematic as a footprint-compatible alternate.

与替代料对比

参数 本产品 MK21FN1M0VLQ12R MK22FN1M0AVLQ12 MK24FN1M0VLQ12 MK22FN1M0VLQ12 MK24FN1M0VLQ12R
Brand NXP Semiconductors NXP Semiconductors NXP Semiconductors NXP Semiconductors NXP Semiconductors NXP Semiconductors
Package 144-LQFP (20x20) 144-LQFP (20x20) 144-LQFP (20x20) 144-LQFP (20x20) 144-LQFP (20x20) 144-LQFP (20x20)
Core Cortex-M4 with FPU Cortex-M4 with FPU Cortex-M4 with FPU Cortex-M4 with FPU Cortex-M4 with FPU Cortex-M4 with FPU
Max Clock 120 MHz 120 MHz 120 MHz 120 MHz 120 MHz 120 MHz
Flash 1 MB 1 MB 1 MB 1 MB 1 MB 1 MB
SRAM 128 KB 128 KB 128 KB 128 KB 128 KB 128 KB

关键差异点

  • Hardware AES-128 and tamper pins on-chip (对比 MK22FN1M0AVLQ12)
  • Pin-compatible upgrade path to High-Speed USB (对比 MK24FN1M0VLQ12)
  • On-chip full-speed USB PHY (no external ULPI chip) (对比 MK60 series (NRND/legacy))

设计说明

Estimated: For a 144-pin 0.5 mm pitch LQFP, the standard NXP K-series decouple recipe is one 100 nF X7R per VDD/VSS pair plus 4.7 uF X5R bulk within ~10 mm. With about 8 VDD pins on this package the cap count is roughly 9. Without this, MCORE ripple can corrupt ADC readings and corrupt USB 2.0 eye tests.

USB 2.0 Full-Speed D+/D- must be 90 ohm differential over a continuous ground plane with no stubs; include a common-mode choke and a transient suppressor. Without these, full-speed eye diagrams fail compliance and full-speed enumeration may fail at the host. NXP provides a dedicated Application Note for K2x USB layout that should be followed exactly.

The MK21FN1M0VLQ12 is NRND, so production orders must be confirmed against the latest NXP PCN stream before lock-in. Failing to do this may trap a design into a 1-year Last-Time-Buy if demand suddenly contracts; pair the part with MK24FN1M0 as a footprint-compatible second-source and keep firmware portable between the two.

Estimated: at maximum 120 MHz, the K21F typically draws about 30 mA with peripherals active, so dissipation stays under 0.1 W at 3.3 V. Theta_JA on 144-LQFP is around 50-55 C/W on a 4-layer JEDEC test board with adequate vias - well within safety - but a small copper pour on VDD/VSS pairs is recommended for cold-swap transients.

合规信息

RoHS
Compliant
REACH
Unknown
AEC-Q100
Not Qualified
无铅
Yes
无卤
Unknown
冲突矿物
Unknown

MK21FN1M0VLQ12 ships in a lead-free 144-LQFP that is RoHS-compliant; reach, halogen-free, and conflict-minerals declarations are not present in the verified web data and should be requested from NXP product compliance if required.

数据核验日期: 2026-10-19 ——数据由 XAIPART 元器件工程团队核验和整理

相关搜索

MK21FN1M0VLQ12 MK21FN1M0VLQ12 datasheet MK21FN1M0VLQ12 price NXP Kinetis K21F 1MB MK21FN1M0VLQ12 buy MK21FN1M0VLQ12 vs MK24FN1M0VLQ12 MK21FN1M0VLQ12 vs MK22FN1M0VLQ12 MK21FN1M0VLQ12 pinout 144-LQFP MK21FN1M0VLQ12 USB MCU with AES tamper MK21FN1M0VLQ12 replacement MK21FN1M0VLQ12 lead time Cortex-M4 1MB Flash full-speed USB MCU Kinetis K21F 144-LQFP NRND

相关元器件 & 术语

NXP Semiconductors MK21FN1M0VLQ12 MK21FN1M0VLQ12R MK22FN1M0AVLQ12 MK22FN1M0VLQ12 MK24FN1M0VLQ12 MK24FN1M0VLQ12R Kinetis K21 Kinetis K22 Kinetis K24 ARM Cortex-M4 FPU DSP Full-Speed USB USB 2.0 AES-128 Tamper detection LQFP 144-LQFP RT1050 RoHS Industrial sensor POS terminal Smart meter Segment LCD
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