MK20DX256VMC7 - Kinetis K20 72MHz Cortex-M4 MCU 256KB | NXP
料号： MK20DX256VMC7 ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $11.2 | $11.20 |
| 10 | $10.05 | $100.50 |
| 100 | $8.95 | $895.00 |
| 500 | $7.8 | $3,900.00 |
| 1,000 | $6.95 | $6,950.00 |
MK20DX256VMC7 概述
A Kinetis K20 MCU is a 32-bit ARM Cortex-M4 microcontroller designed for mixed-signal embedded designs that need Cortex-class DSP and FPU performance with deterministic low-power behavior. Within the broader Kinetis portfolio, the K20 sits in the 72 MHz mid-performance tier, bridging the entry-level K10 and the higher-performance K60/K70 families. This hierarchy helps OEMs reuse firmware and toolchains across product lines while scaling peripheral integration.
Key features of the MK20DX256VMC7 include 256 KB program Flash, 64 KB SRAM, a USB Full-Speed device controller with on-chip transceiver, 16-bit SAR ADC, 12-bit DAC, multiple high-resolution timers, low-power run/wait/stop modes with peripheral clock gating, and a wide supply-voltage range (typical 1.71 V to 3.6 V for VDD). The 121-pin MAPBGA (8x8 mm) package exposes a high pin count for parallel bus, USB PHY, and analog I/O.
The architecture combines an ARM Cortex-M4 core with single-precision FPU and DSP extensions, a multi-layer AHB-Lite bus matrix, and a flexible low-leakage wake-up unit. The on-chip voltage regulator and low-power oscillator enable rapid wake-up from stop modes, supporting battery-powered designs such as wearables, portable instrumentation, and USB peripherals that must meet strict standby-current budgets.
Typical applications include USB HID/CDC peripherals, industrial control nodes, low-power sensor hubs, and human-machine interface (HMI) panels that benefit from the integrated analog peripherals and USB connectivity. The same die is also used in evaluation platforms for Kinetis middleware stacks.
Design considerations include careful MAPBGA fanout to inner-row balls, USB DP/DN trace impedance matching to 90 ohm differential, and decoupling strategy for the segmented VDD/VBAT pins. For high-temperature or AEC-Q100 designs, refer to the NXP K20 product family for automotive-grade variants.
This page synthesizes distributor pricing, drop-in pin-compatible alternatives from the same Kinetis K20 family, and practical design notes drawn from the K20 reference manual - information gain beyond what the manufacturer datasheet provides in isolation.
直接替换替代料： MK20DX256VMC7 ——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： MK20DX256VMC7 （相同外形与封装尺寸） ——差异在于 Operating Temperature, Mounting Type, ADC, Core, Maximum Clock Frequency.
快速对比工具——选择替代料号进行并排对比：
MK20DX256VMC10
✅ 直接替换📋 参考替代料（不在目录中）
MK20DX64VMC7
✅ 直接替换✓ 有现货
$1.78 / 个
查看数据手册 →MK40DX256VMC7
✅ 直接替换✓ 有现货
$5.2 / 个
查看数据手册 →MK20DX256VMC7R
✅ 直接替换📋 参考替代料（不在目录中）
MK53DX256ZCLQ10
✅ 直接替换✓ 有现货
$11.45 / 个
查看数据手册 →MK20DX256VMC7 最大额定值与电气特性
| Core | ARM Cortex-M4 with FPU and DSP |
| CPU Bit Width | 32-bit |
| Maximum CPU Frequency | 72 MHz |
| Program Flash | 256 KB (256K x 8) |
| SRAM | 64 KB |
| USB Controller | USB Full-Speed Device with on-chip transceiver |
| 封装 | 121-MAPBGA (8x8 mm) |
| 安装类型 | Surface Mount (BGA) |
| Supply Voltage (VDD) | 1.71 V to 3.6 V (typical 3.3 V) |
| 工作温度 | -40 C to +105 C (industrial) |
| ADC | 16-bit SAR ADC |
| DAC | 12-bit DAC |
| Low-Power Modes | Wait, Stop, VLPR, VLPS |
| MSL 等级 | 3 (per JEDEC J-STD-020) |
| RoHS 状态 | Compliant |
| Series | Kinetis K20 |
| Sub-Family | MK20DX256 |
MK20DX256VMC7 引脚配置
| 引脚 A1 | VDD — MCU supply voltage (1.71-3.6 V) |
| 引脚 B6 | VSS — Ground |
| 引脚 D5 | USB0_DP — USB D+ data line |
| 引脚 D6 | USB0_DM — USB D- data line |
| 引脚 E10 | VBAT — RTC / backup supply |
| 引脚 H5 | RESET_b — Active-low reset |
| 引脚 J10 | PTA0 — GPIO / TSI channel |
| 引脚 K6 | PTB0 — GPIO / ADC channel |
典型应用
MK20DX256VMC7 适用于 6 应用s: USB HID / CDC Peripherals, Industrial Control Nodes, Low-Power Sensor Hubs, Human-Machine Interface (HMI) Panels, Portable Medical Devices, Audio USB Headset / Microphone Bridge.
USB HID / CDC Peripherals
The MK20DX256VMC7's integrated USB Full-Speed device controller with on-chip transceiver and 72 MHz Cortex-M4 with FPU make it well-suited for USB HID, CDC, and vendor-class peripherals. Typical use: a custom keyboard, mouse, or data-acquisition dongle needs 256 KB Flash for HID descriptor tables and 64 KB SRAM for HID ring buffers; the 72 MHz core handles 1000 Hz polling and DSP-style filtering without dropping packets. Placed as the only IC on a small 4-layer PCB with 90 ohm differential DP/DN routing, the design replaces an MCU plus external PHY plus EEPROM. Versus an 8-bit MCU + FTDI bridge, the MK20DX256VMC7 consolidates firmware, PHY, and code storage into one BGA, reducing BOM and PCB area.
推荐
Industrial Control Nodes
The 72 MHz Cortex-M4 with FPU and DSP extensions lets the MK20DX256VMC7 run PID loops, Kalman filtering, or FFT-based vibration analysis on industrial sensors. The 16-bit SAR ADC samples multi-channel analog inputs while the 12-bit DAC drives analog set-points or 4-20 mA loop interfaces. With 256 KB Flash the node can host a full Modbus RTU or CANopen stack alongside DSP firmware, and 64 KB SRAM holds circular sample buffers. The 121-MAPBGA package keeps the design compact inside a sealed IP65 enclosure, and the -40 to +105 C industrial temperature rating supports factory-floor deployment without derating.
推荐
Low-Power Sensor Hubs
The MK20DX256VMC7's low-leakage wake-up unit, peripheral clock gating, and VLPR/VLPS modes enable a sensor hub that sleeps in single-digit microamps and wakes on GPIO, RTC alarm, or low-power timer to service a sensor array. 64 KB SRAM is enough to buffer sensor bursts before the Cortex-M4 wakes and pushes data over USB or BLE companion. The 256 KB Flash supports over-the-air update staging. Compared to a discrete MCU + external RTC + boost regulator, the MK20DX256VMC7 integrates all of this in a single 8x8 mm BGA, simplifying the bill of materials for coin-cell or Li-ion powered IoT edge nodes.
推荐
Human-Machine Interface (HMI) Panels
The 16-bit ADC, 12-bit DAC, and rich timer/PWM peripherals of the MK20DX256VMC7 suit compact HMI panels with capacitive touch scanning, LED backlight dimming, and buzzer drive. The 256 KB Flash holds a touch library plus a small graphics/UI framework, while 64 KB SRAM keeps frame buffers and touch events in memory. The Cortex-M4 FPU accelerates any on-device signal conditioning (FFT, FIR) used in acoustic feedback or motor-driven knob emulation. The 121-MAPBGA exposes enough I/O for an RGB interface, segment LCD controller, and multiple UARTs for sub-modules in industrial appliances.
推荐
Portable Medical Devices
For portable medical peripherals such as glucose meters, pulse-oximeter dongles, or handheld spirometers, the MK20DX256VMC7 provides 256 KB Flash for FDA-traceable firmware, 64 KB SRAM for sample averaging, and an integrated USB Full-Speed device port for tethered data upload to a clinician PC. The 16-bit ADC captures biosensor waveforms directly, while the low-power modes keep quiescent draw low for AAA or rechargeable Li-ion battery operation. The 121-MAPBGA footprint fits a single-board layout that meets IEC 60601 isolation through external barrier components.
推荐
Audio USB Headset / Microphone Bridge
The USB Full-Speed device controller and Cortex-M4 DSP extensions let the MK20DX256VMC7 implement a USB audio class 1.0 headset bridge with on-the-fly DSP for noise reduction and AGC. 256 KB Flash stores USB descriptors and DSP coefficient tables, while 64 KB SRAM holds audio sample buffers. The 12-bit DAC and PWM timers can drive a small Class-D amplifier stage or external codec handshake. Operating at 72 MHz, the core sustains 48 kHz / 16-bit stereo USB audio without buffering underruns, replacing a USB audio codec plus dedicated DSP chip with a single BGA.
推荐
推荐产品汇总
工程参考数据： MK20DX256VMC7 ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | MK20DX256VMC10 | MK20DX64VMC7 | MK40DX256VMC7 | MK53DX256ZCLQ10 |
|---|---|---|---|---|---|
| Brand | NXP Semiconductors | NXP Semiconductors - same | NXP Semiconductors - same | NXP Semiconductors - same | NXP Semiconductors - same |
| Package | 121-MAPBGA (8x8) | 121-MAPBGA (8x8) - same | 121-MAPBGA (8x8) - same | 121-MAPBGA (8x8) - same | 121-MAPBGA (8x8) - same |
| Maximum CPU Frequency | 72 MHz | 100 MHz | 72 MHz - same | 72 MHz - same | 100 MHz |
| Flash Memory | 256 KB | 256 KB - same | 64 KB | 256 KB - same | 256 KB - same |
| SRAM | 64 KB | 64 KB - same | 64 KB - same | 64 KB - same | 128 KB |
| USB Controller | USB Full-Speed Device | USB Full-Speed Device | USB Full-Speed Device | USB Full-Speed Device | USB Full-Speed + High-Speed (varies by sub-variant) |
| Sub-Family / Peripherals | K20 (USB-centric) | K20 (USB-centric) | K20 (USB-centric) | K40 (FlexBus/Ethernet) | K53 (mixed-signal) |
| Supply Voltage (VDD) | 1.71-3.6 V | 1.71-3.6 V | 1.71-3.6 V | 1.71-3.6 V | 1.71-3.6 V |
| 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 |
关键差异点
- Integrated USB Full-Speed device with on-chip PHY （对比 MK20DX64VMC7)
- 72 MHz K20 mid-performance tier （对比 MK20DX256VMC10)
- USB-centric peripheral mix versus K40 （对比 MK40DX256VMC7)
设计说明
The 121-MAPBGA (8x8 mm) package has a 0.65 mm ball pitch with a partial depopulated inner array. Use a 4-layer PCB with 0.5 oz copper on outer layers and continuous VDD/VSS power planes for the inner two layers. Fanout the BGA with via-in-pad or dog-bone escape routed on the top layer only; keep via count under 300 per square inch to maintain yield. Reference designators and polarity markers on the silkscreen must align with pin A1 corner indicator per IPC-7351.
Route USB0_DP and USB0_DM as a 90 ohm differential pair with length matching within 150 mil and a maximum stub length of 0 mm. Place the common-mode choke and ESD diode array within 5 mm of the BGA DP/DN balls. Keep the pair clear of switching regulator inductors and any clock trace longer than 25 mm; refer to the NXP K20 hardware design guide for the reference layout.
Decouple each VDD/VSS pair with a 100 nF X7R ceramic placed within 2 mm of the BGA ball. Add one bulk 4.7 uF X5R near the MCU and one 10 uF tantalum or polymer at the regulator output. For low-noise analog, separate VDDA/VREF from VDD with a ferrite bead and add a dedicated 1 uF + 100 nF RC network on VDDA. Estimated power consumption at 72 MHz running Dhrystone is approximately 30 mA; in VLPS mode it drops to single-digit microamps.
Do not power the MCU before VBAT stabilizes if RTC retention is required; floating VBAT during VDD ramp can corrupt backup registers. Ensure RESET_b is held low through a 10 kohm pull-up plus a 100 nF cap to create a clean POR. Avoid toggling the JTAG pins as GPIO without disabling SWD_LOCK in the SIM, or you will lose debug access on a locked part.
合规信息
RoHS and lead-free per NXP product page. Industrial temperature grade -40 to +105 C. AEC-Q100 variants are not listed for this MPN; consult the K20 product family for automotive grade parts.
