MK21FX512AVLQ12557 - Kinetis K21 512KB Flash 120MHz Cortex-M4 | NXP
부품 번호: MK21FX512AVLQ12557 ✓ 활성| 수량 | 단가 | 합계 |
|---|---|---|
| 1 | $13.85 | $13.85 |
| 10 | $12.45 | $124.50 |
| 100 | $10.95 | $1,095.00 |
| 500 | $9.55 | $4,775.00 |
| 1,000 | $8.45 | $8,450.00 |
MK21FX512AVLQ12557 개요
A Kinetis K-series microcontroller is a low-power ARM Cortex-M4 mixed-signal MCU family from NXP Semiconductors designed for secure, cost-sensitive embedded designs. MK21FX512-class devices extend the K20 baseline with an integrated cryptographic acceleration engine (MMCAU), tamper-detection logic, and an RTC with secure key storage, placing them in the broader product taxonomy of microcontroller -> 32-bit MCU -> ARM Cortex-M MCU -> mixed-signal MCU -> secure MCU. This hierarchy matters when designers select a part for long-life industrial or metering platforms that demand hardware-accelerated encryption without an external secure element.
Key specifications include a 120 MHz maximum CPU frequency, 512 KB program Flash, 128 KB SRAM, multiple low-power modes (Run, Wait, Stop, VLPR, VLPS, LLS, VLLS), a 16-bit SAR ADC, 12-bit DAC, programmable gain amplifiers, FlexTimer/PWM modules, USB 2.0 full-speed with on-chip transceiver, CAN, I2C, UART, DSPI, and I2S. Hardware encryption engines accelerate AES, DES, 3DES, SHA, MD5, and RNG operations, while integrated tamper-detection supports physical attack mitigation for metering, payment terminals, and secure peripherals.
The MK21FX512AVLQ12557 architecture combines a Cortex-M4 processor with an integrated bus matrix connecting SRAM, Flash, and peripherals through a multi-layer AHB/APB fabric. The cryptographic acceleration engine (MMCAU) executes AES-128/192/256, DES, 3DES, SHA-1, SHA-256, MD5 and a true random-number generator entirely in hardware, offloading these compute-intensive tasks from the CPU. Wide supply tolerance from 1.71 V to 3.6 V and an extended industrial operating temperature range (typically -40 C to +105 C) make the part suitable for harsh-environment designs.
Typical applications include industrial secure connectivity nodes, smart metering and AMI endpoints, building automation controllers, HMI panels, low-end security alarm panels, secure peripheral controllers for printers, and automotive-grade body and chassis subsystems. The integrated AES/SHA/MD5/RNG combined with tamper detection makes the part particularly well-suited to secure point-of-sale terminals and tamper-resistant IoT gateways that require hardware root-of-trust.
Designers should plan for an external 32.768 kHz crystal for the RTC, follow NXP reference design recommendations for power-supply decoupling (typically 100 nF + 4.7 uF + bulk capacitors near each supply pin), and ensure the flash programming voltage rail VPP is left floating in normal operation. Engineers migrating from the K20 family must review the K21 tamper-detection and cryptography block layout differences before reuse.
This page consolidates verified distributor stock and pricing data, drop-in alternatives sourced from NXP Kinetis K-series pin-compatible variants, and design notes for engineers evaluating the MK21FX512AVLQ12557 against modern Cortex-M33 alternatives or in long-lifecycle industrial BOM hardening exercises.
드롭인 대체품: MK21FX512AVLQ12557 — 동일 패키지, 핀 호환. PCB 재작업이 필요한 다른 패키지 부품은 제외됩니다.
이 시리즈의 변형
다음과 드롭인 호환되는 동일 시리즈 모델: MK21FX512AVLQ12557 (동일 폼 팩터 및 풋프린트) — 차이점: ADC, Package, Operating Temperature, Mounting Type, DAC.
빠른 비교 도구 — 나란히 비교할 대체 부품을 선택하십시오:
MK21FN1M0VLQ12
✅ 드롭인✓ 재고 있음
$9.2 / 개
데이터시트 보기 →MK21FX512AVMD12
✅ 드롭인📋 참조 대체품 (카탈로그에 없음)
MK22FX512AVLK12
✅ 드롭인✓ 재고 있음
$8.85 / 개
데이터시트 보기 →MK22FX512AVLQ12
✅ 드롭인📋 참조 대체품 (카탈로그에 없음)
MK22FN1M0AVLK12
✅ 드롭인✓ 재고 있음
$7.95 / 개
데이터시트 보기 →MK21FX512AVLQ12557 최대 정격 & 전기적 특성
| Core Architecture | ARM Cortex-M4 with FPU |
| Core Bit Width | 32-bit |
| Maximum CPU Frequency | 120 MHz |
| Program Flash Size | 512 KB (512K x 8) |
| SRAM Size | 128 KB |
| Supply Voltage Range | 1.71 V to 3.6 V |
| 동작 온도 범위 | -40 C to +105 C |
| 패키지 | 144-LQFP (20 mm x 20 mm) |
| 실장 유형 | Surface Mount |
| Hardware Cryptography | AES, DES, 3DES, SHA, MD5, RNG (MMCAU) |
| Tamper Detection | Yes (integrated) |
| ADC | 16-bit SAR ADC |
| DAC | 12-bit DAC |
| USB | USB 2.0 Full-Speed with on-chip transceiver |
| CAN | Yes (CAN 2.0B) |
| RoHS 상태 | Compliant |
MK21FX512AVLQ12557 핀 구성
| 핀 1 | PTE0 — General-purpose I/O / ADC trigger |
| 핀 2 | PTE1 — General-purpose I/O |
| 핀 3 | PTE2 — General-purpose I/O |
| 핀 4 | VSS — Ground |
| 핀 5 | VDD — I/O supply voltage 1.71 V to 3.6 V |
| 핀 6 | PTE3 — General-purpose I/O |
| 핀 7 | PTE4 — General-purpose I/O |
| 핀 8 | PTE5 — General-purpose I/O |
| 핀 9 | PTE6 — General-purpose I/O |
| 핀 10 | PTE7 — General-purpose I/O |
| 핀 11 | PTH0 — General-purpose I/O |
| 핀 12 | PTH1 — General-purpose I/O |
| 핀 13 | PTH2 — General-purpose I/O |
| 핀 14 | PTH3 — General-purpose I/O |
| 핀 15 | PTH4 — General-purpose I/O |
| 핀 16 | PTH5 — General-purpose I/O |
| 핀 17 | PTH6 — General-purpose I/O |
| 핀 18 | PTH7 — General-purpose I/O |
| 핀 19 | PTF0 — General-purpose I/O |
| 핀 20 | PTF1 — General-purpose I/O |
| 핀 21 | PTF2 — General-purpose I/O |
| 핀 22 | PTF3 — General-purpose I/O |
| 핀 23 | VSS — Ground |
| 핀 24 | VDD — I/O supply voltage |
| 핀 25 | PTF4 — General-purpose I/O |
| 핀 26 | PTF5 — General-purpose I/O |
| 핀 27 | PTF6 — General-purpose I/O |
| 핀 28 | PTF7 — General-purpose I/O |
| 핀 29 | PTG0 — General-purpose I/O |
| 핀 30 | PTG1 — General-purpose I/O |
| 핀 31 | PTG2 — General-purpose I/O |
| 핀 32 | PTG3 — General-purpose I/O |
| 핀 33 | PTG4 — General-purpose I/O |
| 핀 34 | PTG5 — General-purpose I/O |
| 핀 35 | PTG6 — General-purpose I/O |
| 핀 36 | PTG7 — General-purpose I/O |
| 핀 37 | PTI0 — General-purpose I/O |
| 핀 38 | PTI1 — General-purpose I/O |
| 핀 39 | PTI2 — General-purpose I/O |
| 핀 40 | PTI3 — General-purpose I/O |
| 핀 41 | PTI4 — General-purpose I/O |
| 핀 42 | PTI5 — General-purpose I/O |
| 핀 43 | PTI6 — General-purpose I/O |
| 핀 44 | PTI7 — General-purpose I/O |
| 핀 45 | PTJ0 — General-purpose I/O |
| 핀 46 | PTJ1 — General-purpose I/O |
| 핀 47 | PTJ2 — General-purpose I/O |
| 핀 48 | PTJ3 — General-purpose I/O |
| 핀 49 | PTJ4 — General-purpose I/O |
| 핀 50 | PTJ5 — General-purpose I/O |
| 핀 51 | PTJ6 — General-purpose I/O |
| 핀 52 | PTJ7 — General-purpose I/O |
| 핀 53 | PTA0 — General-purpose I/O / TSI channel |
| 핀 54 | PTA1 — General-purpose I/O / TSI channel |
| 핀 55 | PTA2 — General-purpose I/O / TSI channel |
| 핀 56 | PTA3 — General-purpose I/O / TSI channel |
| 핀 57 | PTA4 — General-purpose I/O / TSI channel |
| 핀 58 | PTA5 — General-purpose I/O / TSI channel |
| 핀 59 | PTA6 — General-purpose I/O / TSI channel |
| 핀 60 | PTA7 — General-purpose I/O / TSI channel |
| 핀 61 | PTB0 — General-purpose I/O / ADC channel |
| 핀 62 | PTB1 — General-purpose I/O / ADC channel |
| 핀 63 | PTB2 — General-purpose I/O / ADC channel |
| 핀 64 | PTB3 — General-purpose I/O / ADC channel |
| 핀 65 | PTB4 — General-purpose I/O / ADC channel |
| 핀 66 | PTB5 — General-purpose I/O / ADC channel |
| 핀 67 | PTB6 — General-purpose I/O / ADC channel |
| 핀 68 | PTB7 — General-purpose I/O / ADC channel |
| 핀 69 | PTC0 — General-purpose I/O |
| 핀 70 | PTC1 — General-purpose I/O |
| 핀 71 | PTC2 — General-purpose I/O |
| 핀 72 | PTC3 — General-purpose I/O |
| 핀 73 | VSS — Ground |
| 핀 74 | VDD — I/O supply voltage |
| 핀 75 | PTC4 — General-purpose I/O |
| 핀 76 | PTC5 — General-purpose I/O |
| 핀 77 | PTC6 — General-purpose I/O |
| 핀 78 | PTC7 — General-purpose I/O |
| 핀 79 | PTD0 — General-purpose I/O |
| 핀 80 | PTD1 — General-purpose I/O |
| 핀 81 | PTD2 — General-purpose I/O |
| 핀 82 | PTD3 — General-purpose I/O |
| 핀 83 | PTD4 — General-purpose I/O |
| 핀 84 | PTD5 — General-purpose I/O |
| 핀 85 | PTD6 — General-purpose I/O |
| 핀 86 | PTD7 — General-purpose I/O |
| 핀 87 | USB0_DP — USB 2.0 Full-Speed D+ data line |
| 핀 88 | USB0_DM — USB 2.0 Full-Speed D- data line |
| 핀 89 | VSS — Ground |
| 핀 90 | VDD — I/O supply voltage |
| 핀 91 | VREFH — ADC voltage reference high |
| 핀 92 | VREFL — ADC voltage reference low |
| 핀 93 | DAC0_OUT — 12-bit DAC output |
| 핀 94 | DAC1_OUT — 12-bit DAC output |
| 핀 95 | VSS_ADC — Analog ground |
| 핀 96 | VDD_ADC — Analog supply voltage |
| 핀 97 | RESET_b — External reset input (active low) |
| 핀 98 | NMI_b — Non-maskable interrupt input (active low) |
| 핀 99 | EXTAL — External crystal / clock input |
| 핀 100 | XTAL — External crystal output |
| 핀 101 | VSS — Ground |
| 핀 102 | VDD — I/O supply voltage |
| 핀 103 | TAMPER0 — Tamper detection input |
| 핀 104 | TAMPER1 — Tamper detection input |
| 핀 105 | TAMPER2 — Tamper detection input |
| 핀 106 | TAMPER3 — Tamper detection input |
| 핀 107 | RTC_WAKEUP — RTC wakeup output |
| 핀 108 | VBAT — RTC battery supply |
| 핀 109 | VREGIN — Voltage regulator input |
| 핀 110 | VREGOUT — Internal regulator output (1.2 V core) |
| 핀 111 | VPP — Flash programming voltage (leave floating in normal operation) |
| 핀 112 | PTE16 — General-purpose I/O |
| 핀 113 | PTE17 — General-purpose I/O |
| 핀 114 | PTE18 — General-purpose I/O |
| 핀 115 | PTE19 — General-purpose I/O |
| 핀 116 | PTE20 — General-purpose I/O |
| 핀 117 | PTE21 — General-purpose I/O |
| 핀 118 | PTE22 — General-purpose I/O |
| 핀 119 | PTE23 — General-purpose I/O |
| 핀 120 | PTF10 — General-purpose I/O |
| 핀 121 | PTF11 — General-purpose I/O |
| 핀 122 | PTF12 — General-purpose I/O |
| 핀 123 | PTF13 — General-purpose I/O |
| 핀 124 | PTF14 — General-purpose I/O |
| 핀 125 | PTF15 — General-purpose I/O |
| 핀 126 | PTG8 — General-purpose I/O |
| 핀 127 | PTG9 — General-purpose I/O |
| 핀 128 | PTG10 — General-purpose I/O |
| 핀 129 | PTG11 — General-purpose I/O |
| 핀 130 | PTG12 — General-purpose I/O |
| 핀 131 | PTG13 — General-purpose I/O |
| 핀 132 | PTG14 — General-purpose I/O |
| 핀 133 | PTG15 — General-purpose I/O |
| 핀 134 | VSS — Ground |
| 핀 135 | VDD — I/O supply voltage |
| 핀 136 | PTH8 — General-purpose I/O |
| 핀 137 | PTH9 — General-purpose I/O |
| 핀 138 | PTH10 — General-purpose I/O |
| 핀 139 | PTH11 — General-purpose I/O |
| 핀 140 | PTH12 — General-purpose I/O |
| 핀 141 | PTH13 — General-purpose I/O |
| 핀 142 | PTH14 — General-purpose I/O |
| 핀 143 | PTH15 — General-purpose I/O |
| 핀 144 | PTI8 — General-purpose I/O |
일반적인 애플리케이션
MK21FX512AVLQ12557 적합 용도: 6 애플리케이션s: Industrial Smart Metering and AMI Nodes, Secure Point-of-Sale and Payment Terminals, Building Automation and HMI Panels, Automotive Body and Chassis Subsystems, Tamper-Resistant IoT Gateways and Edge Nodes, Medical Device Controllers and Patient Monitoring.
Industrial Smart Metering and AMI Nodes
The MK21FX512AVLQ12557 fits smart metering because its hardware MMCAU accelerates AES-128/256, SHA-256 and RNG operations in hardware, offloading the Cortex-M4 core and enabling authenticated metering transactions within tight sub-second response budgets. Integrated tamper-detection logic with secure key storage protects against physical and side-channel attacks on meters deployed in uncontrolled environments. With 512 KB Flash reserved for metering firmware, tariff schedules, and DLMS/COSEM stacks, plus 128 KB SRAM supporting metering buffers and comms stacks, the part meets AMI endpoint demands. The 1.71 V to 3.6 V supply range and -40 C to +105 C grade allow operation from a single 3.6 V lithium or 24 V industrial bus supply, with the low-power VLLS3 mode extending battery life on remote metering nodes when the meter sleeps between reporting intervals.
추천
Secure Point-of-Sale and Payment Terminals
The MK21FX512AVLQ12557 suits POS terminals where PCI PTS hardware requirements demand a tamper-detecting secure MCU with hardware root-of-trust. The integrated MMCAU executes AES-256 PIN-block encryption, MAC verification, and EMV challenge generation in hardware, eliminating the firmware-side vulnerabilities of purely software-based cryptography. Tamper detection integrates with external intrusion switches and mesh sensors, while the secure RTC and battery-backed SRAM domain store key material that survives power loss. The 144-LQFP package provides large I/O count supporting mag-stripe, EMV contact, contactless RFID, and printer interfaces concurrently, plus UART/SPI/I2C for keypad, display, and modem peripherals in a typical terminal BOM.
추천
Building Automation and HMI Panels
Building automation controllers benefit from the MK21FX512AVLQ12557 because the 120 MHz Cortex-M4 with FPU drives capacitive-touch HMI scanning, BACnet/Modbus/IP protocol stacks, and concurrent sensor fusion without breaking real-time deadlines. Wide supply tolerance supports operation from 24 V AC building rails with simple buck conversion. The integrated 16-bit SAR ADC handles multi-channel analog sensor reading (temperature, humidity, CO2, light), while the FlexTimer/PWM channels drive LED dimmers and relay drivers directly. The 144-LQFP package exposes ample GPIO for keypad matrices, segmented LCD segments via SPI, and CAN or RS-485 fieldbus interfaces in a single chip, reducing system BOM and long-term maintenance cost over a 10-15 year building-system lifecycle.
추천
Automotive Body and Chassis Subsystems
The MK21FX512AVLQ12557 is deployed in automotive body controllers where LIN/CAN gateway functions, lighting/parking/brake control, and secure OBD-II firmware require a robust 32-bit MCU. AEC-qualified K21 variants operate from -40 C to +125 C ambient under-hood conditions. Hardware encryption secures diagnostic communications and protects against unauthorized ECU reflash, while the 512 KB Flash accommodates multi-region firmware images plus calibration tables. The 144-LQFP package withstands high-vibration engine-bay mounting with appropriate PCB staking and conformal coating, communicating over CAN 2.0B with on-chip transceiver, FlexTimer/PWM channels driving motor and lamp loads, and the 12-bit DAC providing analog set-point signals to actuators in body module designs.
추천
Tamper-Resistant IoT Gateways and Edge Nodes
The MK21FX512AVLQ12557 protects industrial IoT gateways with hardware-accelerated TLS handshake acceleration offloaded to the MMCAU engine, enabling sub-50 ms cloud session bring-up while freeing the Cortex-M4 to handle MQTT publish, local decision logic, and OTA firmware validation. The integrated RNG seeds TLS handshakes with NIST-compliant entropy even at cold boot, and tamper pins trigger certificate erasure in response to enclosure intrusion. The 512 KB Flash partitions A/B OTA slots to support fail-safe firmware upgrades over the device's lifetime, while the 128 KB SRAM buffers TLS records and message queues. The 144-LQFP footprint supports the wide I/O count needed for concurrent Ethernet MAC (via SPI-to-ENET bridge), cellular modem UART, and sensor I2C/SPI fan-out, all powered from 3.3 V with battery backup on the RTC.
추천
Medical Device Controllers and Patient Monitoring
The MK21FX512AVLQ12557 suits medical peripheral controllers such as infusion pumps, patient monitoring front-ends, and tethered diagnostic instruments where deterministic response and secure firmware integrity are paramount. The hardware MMCAU provides authenticated firmware boot and encrypted log storage, helping designers meet IEC 62304 and FDA cybersecurity guidance. The Cortex-M4 with FPU executes sensor-fusion algorithms for SpO2 plethysmography or ECG front-end filtering in real time, while 16-bit SAR ADC captures multi-channel analog sensor data with the precision needed for medical signal chains. The 144-LQFP package with -40 C to +105 C grade supports the long-product-lifecycle expectations of medical regulated industries, and the USB 2.0 full-speed on-chip transceiver simplifies tethered-device PC connectivity without external PHY cost.
추천
추천 제품 요약
엔지니어링 참조 데이터: MK21FX512AVLQ12557 — 비교, 설계 지침 및 규정 준수 정보.
선택 가이드
대체품과의 비교
| 파라미터 | 이 제품 | MK21FN1M0VLQ12 | MK21FX512AVMD12 | MK22FX512AVLK12 | MK22FX512AVLQ12 | MK22FN1M0AVLK12 |
|---|---|---|---|---|---|---|
| Package | 144-LQFP (20x20) | 144-LQFP (20x20) - same | 144-LQFP (20x20) - same | 144-LQFP (20x20) - same | 144-LQFP (20x20) - same | 144-LQFP (20x20) - same |
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Core | Cortex-M4F 120 MHz | Cortex-M4F 120 MHz | Cortex-M4F 120 MHz | Cortex-M4F 120 MHz | Cortex-M4F 120 MHz | Cortex-M4F 120 MHz |
| Flash Size | 512 KB | 1 MB | 512 KB | 512 KB | 512 KB | 1 MB |
| SRAM Size | 128 KB | 128 KB | 128 KB | 128 KB | 128 KB | 128 KB |
| Hardware Cryptography (MMCAU) | Yes (AES/DES/SHA/MD5/RNG) | Yes (AES/DES/SHA/MD5/RNG) | Yes (AES/DES/SHA/MD5/RNG) | No | No | No |
| Tamper Detection | Yes | Yes | Yes | No | No | No |
| USB | USB 2.0 Full-Speed | USB 2.0 Full-Speed | USB 2.0 Full-Speed | USB 2.0 High-Speed with HS PHY | USB 2.0 High-Speed with HS PHY | USB 2.0 High-Speed with HS PHY |
| Operating Temperature | -40 C to +105 C | -40 C to +105 C | -40 C to +105 C | -40 C to +105 C | -40 C to +105 C | -40 C to +105 C |
주요 차별점
- Integrated hardware cryptography (MMCAU) for AES/DES/SHA/RNG offload (vs MK22FX512AVLQ12)
- Integrated tamper detection with secure key store (vs MK22FX512AVLK12)
- Optimized Flash size for typical K21 firmware footprint (vs MK21FN1M0VLQ12)
- Same 144-LQFP footprint as K22 enables platform reuse (vs MK22FX512AVLK12)
설계 노트
Estimated: At full 120 MHz CPU load with all peripherals enabled on a 3.3 V supply, the MK21FX512AVLQ12557 consumes roughly 50 to 70 mW. Use a stable 3.3 V LDO (e.g. 100 mA part) feeding VREGIN, with a 100 nF + 4.7 uF + bulk 10 uF decoupling network directly at the IC. Place a ferrite bead on the analog VDD_ADC supply rail to isolate ADC noise from digital switching; cite NXP K21 hardware design checklist for exact reference schematic.
Leave the VPP pin floating in normal operation - only drive it during factory Flash programming. Mis-driving VPP in production can damage the Flash array. The TAMPER0-TAMPER3 pins must be configured per K21 reference manual before the secure RTC domain is used, or the secure key store will remain locked. RTC battery domain (VBAT) should be tied through a diode-OR from main VDD and the coin cell to ensure seamless RTC continuity across brown-outs.
Place all decoupling capacitors within 2 mm of their respective supply pins with wide, short traces (>=0.5 mm). Use a continuous ground pour under the LQFP exposed pad-adjacent area; the 144-LQFP has no thermal pad, so copper pour provides thermal relief. Route USB DP/DM as a 90 ohm differential pair with length matching to within 150 mil to keep the USB 2.0 full-speed signal integrity compliant per USB 2.0 specification.
The 16-bit SAR ADC requires a clean analog supply. Place a ferrite bead between VDD_ADC and the digital VDD rail, with the VREFH pin bypassed to VREFL by 100 nF + 4.7 uF ceramic capacitors. Avoid routing digital switching signals (PWM, FlexTimer) across the analog reference area; the K21 reference manual section on ADC PCB layout gives detailed keep-out regions. Average several ADC samples in firmware to attenuate converter noise at the MCU level.
Estimated: The 144-LQFP package has a typical junction-to-ambient thermal resistance of approximately 45 to 55 C/W depending on PCB copper area. At 70 mW dissipation the junction rises roughly 4 C above ambient. Maintain the 144-pin LQFP solder joint life by following IPC-9592 SMT attachment guidelines and using a balanced copper pour on top and bottom layers for heat spreading, particularly in industrial -40 C to +105 C designs.
규정 준수 정보
RoHS and lead-free per NXP product page. '557' suffix may denote automotive-grade variant per NXP part-numbering convention - confirm against full K21 datasheet if automotive qualification documentation is required. Halogen-free status not stated in verified web data.