STM32L011K4U6 - 32 MHz 16KB Cortex-M0+ | STMicroelectronics
부품 번호: STM32L011K4U6 ✓ 활성STM32L011K4U6 개요
A microcontroller is a programmable semiconductor that integrates a processor core, memory, and peripherals into one device. The STM32L0 access-line family combines Arm Cortex-M0+ processing with embedded flash, SRAM, communication interfaces, timers, and low-power features. This hierarchy places the STM32L011K4U6 in the category of low-power embedded MCU, where the device controls sensors, communication links, user interfaces, and power-management functions in battery-operated or compact industrial systems.
The headline specifications are a 32-bit Arm Cortex-M0+ core operating up to 32 MHz, 16 KB of Flash, and 2 KB of SRAM. The 32-UFQFPN package uses a 5 x 5 mm footprint and provides 32 pins, including access to the device's GPIO and selected communication functions. The 16 K x 8 Flash organization supports on-chip program storage without requiring an external memory device in applications whose firmware fits within the available capacity.
The STM32L0 architecture is intended for energy-conscious embedded control. Its compact 2 KB SRAM supports stack space, working variables, and modest data buffers, while the 16 KB Flash budget is suitable for focused firmware rather than complex graphical workloads. The manufacturer identifies the STM32L011x3/4 family as an ultra-low-power access line with an Arm Cortex-M0+ 32-bit RISC core, reset and supply-management functions, and integrated low-power control resources.
Typical uses include connected sensors, compact industrial controllers, low-power monitoring equipment, battery-powered accessories, and small household appliances. Designers can assign GPIO pins to digital inputs, outputs, and mixed functions while using on-chip timers and serial interfaces for sensing, actuation, and communication. Firmware should be sized against both the 16 KB Flash limit and the 2 KB SRAM limit during early architecture planning.
The primary design consideration is careful allocation of memory and board area. Place the decoupling network and exposed-pad thermal connection according to the manufacturer's layout recommendations, keep sensitive signal paths compact, and confirm the exact pin multiplexing before assigning connectors. Software must also account for the small SRAM capacity by avoiding unnecessarily large buffers and deep recursive call structures.
This page combines the manufacturer product information, distributor availability references, drop-in replacement analysis, application guidance, comparison parameters, and practical design notes to help engineers evaluate the STM32L011K4U6 before integrating it into a compact, low-power embedded design.
드롭인 대체품: STM32L011K4U6 — 동일 패키지, 핀 호환. PCB 재작업이 필요한 다른 패키지 부품은 제외됩니다.
STM32L011K3U6
✅ 드롭인 ⚠️ 사양 미검증📋 참조 대체품 (카탈로그에 없음)
STM32L011K4U6 최대 정격 & 전기적 특성
| Product Type | Ultra-low-power 32-bit microcontroller |
| CPU Core | Arm Cortex-M0+ |
| Instruction Set Width | 32 bit |
| Maximum CPU Frequency | 32 MHz |
| Flash Memory | 16 KB (16K x 8) |
| SRAM | 2 KB |
| Architecture | Arm Cortex-M0+ 32-bit RISC |
| Family | STM32L011x3/4 access line |
| 패키지 | 32-UFQFPN (5 x 5 mm) |
| 핀 수 | 32 pins |
| 실장 유형 | Surface mount |
STM32L011K4U6 32-ufqfpn (5 x 5 mm) 핀 구성 가이드
STM32L011K4U6(32-ufqfpn (5 x 5 mm) 패키지)의 핀 구성입니다. 이 디지털 IC에는 GPIO, 통신 인터페이스(UART, SPI, I2C), 전원 핀이 포함되어 있습니다. 대체 핀 기능과 구성 옵션은 제조사 데이터시트를 참조하십시오. 임베디드 시스템 설계와 PCB 레이아웃에 필수적입니다.
다음에 대한 상세 핀아웃 데이터 없음: STM32L011K4U6.
다음을 참조하십시오: 데이터시트 전체 핀 구성은 다음을 참조하십시오.
일반적인 애플리케이션
STM32L011K4U6 적합 용도: 6 애플리케이션s: Battery-Powered Sensor Node, Industrial Condition Monitoring, Smart Home Control Module, Low-Power Environmental Monitor, Compact Access-Control Reader, Battery-Powered Appliance Controller.
Battery-Powered Sensor Node
The STM32L011K4U6 fits compact sensor nodes that periodically acquire measurements, evaluate them locally, and transmit results through a low-power serial link. Its 32 MHz Arm Cortex-M0+ core provides timely handling of sensor interrupts and protocol tasks, while 16 KB of Flash leaves more room for application code than the 2 KB option in STM32L011K3U6. The 2 KB SRAM is sufficient for focused firmware with modest buffers. Place the MCU close to the sensor interface, keep the board compact, and review sleep-mode current against the system duty cycle.
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Industrial Condition Monitoring
The STM32L011K4U6 is appropriate for compact condition-monitoring modules that combine digital inputs, a low-speed serial interface, and local state tracking. Its 32-bit Cortex-M0+ architecture supports event handling and communication framing at a 32 MHz maximum clock frequency. Sixteen kilobytes of Flash can hold a control loop, diagnostics, and communication handlers, whereas 2 KB of SRAM favors event-based rather than high-volume buffering. Use GPIO interrupt routing for sensors, isolate long field-wired inputs, and validate logic thresholds against the electrical limits in the manufacturer documentation.
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Smart Home Control Module
The STM32L011K4U6 can serve as the central controller in a small smart-home module that reads switches, drives indicators, and coordinates a serial accessory bus. The 32-pin UFQFPN package supports integration on a dense board, while the 16 KB Flash capacity accommodates protocol logic and application routines. Its 2 KB SRAM is adequate for compact state machines but requires disciplined buffer management. Assign GPIOs according to the pin table, provide local decoupling, and expose firmware updates through a protected programming interface.
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Low-Power Environmental Monitor
The STM32L011K4U6 suits environmental monitoring products that sample sensors on a schedule and remain in a low-energy state between measurements. The ultra-low-power STM32L011x3/4 family targets battery-operated equipment, and the 32 MHz Cortex-M0+ core provides enough performance for calibration logic and local threshold decisions. Sixteen kilobytes of Flash supports a complete measurement and logging routine, while 2 KB of SRAM encourages compact sample processing. Minimize always-on peripherals, select serial communication only during data exchange, and verify wake-up behavior and average current in the final board configuration.
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Compact Access-Control Reader
The STM32L011K4U6 can be used in a compact access-control reader that reads a keypad or digital credential interface and reports status over a serial link. Its 32-bit Cortex-M0+ core supports event handling at up to 32 MHz, and the 16 KB Flash capacity allows firmware for input debouncing, credential processing, and status reporting. The 2 KB SRAM is suitable for short-lived working buffers but not large credential databases. Preserve deterministic input timing, protect programming access, and validate supply and I/O levels for the complete access-control assembly.
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Battery-Powered Appliance Controller
The STM32L011K4U6 is a practical controller for a small battery-powered appliance requiring local logic, user feedback, and simple actuator management. The 32 MHz Arm Cortex-M0+ core handles timers and control tasks, while 16 KB of Flash provides room for a dedicated state machine and safety checks. Its 2 KB SRAM is most effective with event-driven firmware that avoids large display or communication buffers. Keep actuator drive stages separate from sensitive logic, use the exposed pad as intended for thermal performance, and verify that startup and shutdown sequences meet the appliance's energy targets.
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추천 제품 요약
엔지니어링 참조 데이터: STM32L011K4U6 — 비교, 설계 지침 및 규정 준수 정보.
선택 가이드
대체품과의 비교
| 파라미터 | 이 제품 | STM32L011K3U6 |
|---|---|---|
| Package | 32-UFQFPN (5 x 5 mm) | 32-UFQFPN (5 x 5 mm) - same package |
| Brand | STMicroelectronics | STMicroelectronics |
| CPU Core | Arm Cortex-M0+ | Arm Cortex-M0+ |
| Maximum CPU Frequency | 32 MHz | 32 MHz |
| Flash Memory | 16 KB (16K x 8) | 2 KB |
| SRAM | 2 KB | 2 KB |
| Architecture | 32-bit RISC | 32-bit RISC |
| Product Class | Ultra-low-power access-line MCU | Ultra-low-power access-line MCU |
주요 차별점
- Eight times the Flash capacity of the closest identified same-package alternative (vs STM32L011K3U6)
- Matches the alternative's core speed and SRAM (vs STM32L011K3U6)
- Retains the compact 32-pin 5 x 5 mm footprint (vs STM32L011K3U6)
설계 노트
Place the device's input, output, and reference decoupling capacitors directly beside their corresponding pins, following the capacitor values and routing details in the manufacturer package documentation. The UFQFPN package is only 5 x 5 mm, so component placement and trace geometry can materially affect assembly yield. Keep sensitive sensor and communication traces away from switching nodes and route the exposed pad to the required ground-copper area.
Design the power tree around the manufacturer's permitted supply range and verify startup, reset, and brownout behavior at the minimum battery or supply voltage. The 32 MHz Cortex-M0+ operating point is not a reason to run the core continuously in a low-power product. Select clock and peripheral states deliberately, measure sleep current on the assembled board, and include leakage from pull resistors and external interface devices in the total energy budget.
Do not select the STM32L011K3U6 merely because it has the same footprint. Its 2 KB Flash is 14 KB smaller than the target's 16 KB, and an image built for the K4 may not fit or operate correctly in the K3. Similarly, confirm the exact suffix functions, peripheral mix, temperature grade, and pin multiplexing before releasing a replacement order. A footprint-compatible part is only a candidate until firmware and electrical compatibility are established.
Assign GPIO and communication functions from the official pin-description table rather than from the package drawing alone. Several alternate functions can share a pin, and fixed functions such as reset, debug, and supply pins can constrain the usable GPIO map. Plan the PCB around the final pin assignment, keep oscillator and high-speed clock routes short, and provide accessible test points for programming, reset, and power-state measurements.
Treat the exposed thermal pad as an electrical and thermal connection specified by the manufacturer rather than as an optional heat-spreading feature. Although the STM32L011K4U6 is designed for low-power embedded use, switching-node proximity or unsuitable copper thermal design can increase junction temperature and upset timing-sensitive behavior. Follow the package drawing for pad geometry, keep the pad free of unintended shorts, and provide adequate copper without compromising EMI separation.
규정 준수 정보
Compliance declarations are not stated in the product-page summary. Confirm RoHS, REACH, AEC-Q100, lead-free, halogen-free, and conflict-minerals status from current manufacturer documentation before production release.