STM32L100C6U6 - 32MHz Cortex-M3 MCU | STMicroelectronics
Référence : STM32L100C6U6 ✓ ActifSTM32L100C6U6 Présentation
An ultra-low-power microcontroller is an embedded semiconductor designed to complete sensing, control, and communications tasks while minimizing energy consumption. The STM32L1 family belongs to the hierarchy of 32-bit microcontrollers, embedded processors, programmable controllers, and general-purpose semiconductors. This makes the STM32L100C6U6 suitable for battery-operated equipment where useful processing capability must coexist with long standby periods and low active current.
The device provides a 32 MHz ARM Cortex-M3 core, 32 KB Flash, 4 KB SRAM, and USB connectivity according to the manufacturer product-page information and distributor records. Its autonomous dynamic voltage scaling adjusts the operating conditions as demand changes, while the low-power architecture includes multiple low-power modes. These characteristics are relevant to portable sensors, compact USB peripherals, industrial controllers, and connected embedded products.
The STM32L100C6U6 combines general-purpose processing with low-power design techniques rather than focusing on a single high-throughput interface. Its 32-bit Cortex-M3 architecture supports efficient control workloads, while the 32 KB embedded Flash provides room for firmware, configuration data, and application code. The 48-pin UFQFPN package provides a compact surface-mount option for space-constrained assemblies, while the exposed thermal pad assists heat transfer when the device is properly soldered.
Typical uses include low-power sensor nodes, USB-connected portable equipment, industrial monitoring modules, compact control boards, and low-energy IoT devices. In a sensor node, the microcontroller can remain in a low-power state between measurements and use its 32 MHz processing capability when data must be filtered, stored, or transmitted. In a USB peripheral, the integrated connectivity can simplify communication with a host computer.
Designers should confirm the exact pin functions, exposed-pad layout, operating-temperature grade, and peripheral assignments against the manufacturer datasheet before layout release. Power sequencing, USB impedance-controlled routing, and low-leakage input design can materially affect reliability. The 48-pin package also requires careful thermal-via placement so heat can leave the exposed pad without compromising USB signal integrity.
This product page combines verified manufacturer and distributor information, same-family drop-in candidates, a package-level comparison, and practical design guidance. It helps engineers evaluate the STM32L100C6U6 for low-power USB designs while clearly identifying specifications that still require confirmation from the official datasheet.
Alternatives de remplacement direct pour STM32L100C6U6 — même boîtier, compatible broche à broche. Les références à boîtier différent nécessitant une retouche du PCB sont exclues.
STM32L100C6U6A
✅ Remplacement direct ⚠️ Spécifications non vérifiées📋 Alternative de référence (hors catalogue)
STM32L100C8U6
✅ Remplacement direct ⚠️ Spécifications non vérifiées📋 Alternative de référence (hors catalogue)
STM32L100CBU6
✅ Remplacement direct ⚠️ Spécifications non vérifiées📋 Alternative de référence (hors catalogue)
STM32L151C6U6A
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
STM32L152C6U6A
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
STM32L100C6U6 Valeurs maximales et caractéristiques électriques
| Device Type | 32-bit ultra-low-power ARM Cortex-M3 microcontroller |
| CPU Core | ARM Cortex-M3 |
| Maximum CPU Frequency | 32 MHz |
| Flash Memory | 32 KB |
| Flash Organization | 32K x 8 |
| SRAM | 4 KB |
| Operating Voltage | 2.5 V or 3.3 V |
| USB Connectivity | Universal Serial Bus supported |
| Voltage Scaling | Autonomous dynamic voltage scaling |
| Low-Power Modes | 5 low-power modes |
| Process Technology | Proprietary ultra-low-leakage process technology |
| Boîtier | 48-pin UFQFPN |
| Nombre de broches | 48 pins |
| Type de montage | Surface Mount |
| Shipping Package | Tray |
Guide de configuration des broches du STM32L100C6U6 tray
Configuration des broches du STM32L100C6U6 (boîtier tray). Ce circuit intégré numérique comprend des GPIO, des interfaces de communication (UART, SPI, I2C) et des broches d'alimentation. Consultez la fiche technique du fabricant pour les fonctions alternatives des broches et les options de configuration. Indispensable pour la conception de systèmes embarqués et la conception de circuits imprimés.
Aucune donnée de brochage détaillée disponible pour STM32L100C6U6.
Consultez la fiche technique pour la configuration complète des broches.
Applications typiques
STM32L100C6U6 convient pour 6 applications: Battery-Powered Sensor Nodes, USB Portable Data Loggers, Industrial Monitoring Modules, Compact USB Peripherals, Low-Energy IoT Controllers, Low-Power Control Boards.
Battery-Powered Sensor Nodes
The STM32L100C6U6 fits battery-powered sensor nodes because its ultra-low-leakage process, autonomous dynamic voltage scaling, and five low-power modes support duty-cycled measurement systems. Its 32 MHz ARM Cortex-M3 core can perform acquisition, filtering, and local data processing, while 32 KB of Flash holds application firmware and 4 KB of SRAM supports short-lived buffers and sensor state. The device is placed in a low-power state between samples, wakes to process readings, and returns to sleep. The expected benefit is lower standby demand than a continuously running general-purpose MCU, although final battery life depends on sensor current, wake frequency, regulator losses, and measured firmware behavior.
Recommandé
USB Portable Data Loggers
The STM32L100C6U6 is suitable for a compact USB data logger because the manufacturer identifies USB connectivity in the STM32L100C6 family while the verified device data confirms a 32 MHz Cortex-M3 core and 32 KB Flash. The MCU can collect sensor or system data, timestamp events, format records, and transfer them over USB. Its 4 KB SRAM is sufficient for controlled-size buffers rather than large simultaneous datasets, so a designer should use streaming or compact buffering. The key benefit is integration of general-purpose control and USB in one low-power MCU, reducing component count while retaining flexibility for firmware updates and configuration.
Recommandé
Industrial Monitoring Modules
The STM32L100C6U6 can serve as the control core in an industrial monitoring module that must combine low-power operation with multiple digital and analog functions. Its 32-bit Cortex-M3 core provides enough performance for local threshold checks, state-machine control, data logging, and communication handling, while the 48-pin UFQFPN package reduces board area compared with many leaded devices. The 2.5 V or 3.3 V operating options support integration with conventional embedded power systems. Its trade-off is limited memory: 32 KB of Flash and 4 KB of SRAM require disciplined firmware sizing, and environmental requirements such as extended temperature or industrial qualification must be checked separately.
Recommandé
Compact USB Peripherals
The STM32L100C6U6 is appropriate for compact USB peripherals requiring both control logic and host connectivity in a small surface-mount footprint. The MCU can manage buttons, indicators, sensors, protocol handling, and USB enumeration within a 48-pin UFQFPN package. Its 32 MHz Cortex-M3 performance is suitable for protocol and low-rate data-processing tasks rather than high-bandwidth streaming. Compared with a discrete USB interface plus separate microcontroller, the integrated solution can reduce board area and firmware coordination. The design must still allocate careful routing and grounding for USB, verify connector and transceiver requirements, and confirm that the available 4 KB of SRAM satisfies the selected protocol stack.
Recommandé
Low-Energy IoT Controllers
The STM32L100C6U6 can act as a low-energy IoT controller for sensing, local decision-making, and intermittent communication. Its autonomous dynamic voltage scaling and five low-power modes allow the processor to match changing workload conditions, while the ultra-low-leakage process supports applications where standby leakage is significant. The 32 KB Flash and 4 KB SRAM are suitable for compact protocol stacks and local logic but may constrain richer radio stacks, certificates, or buffering. Compared with a general Cortex-M3 running at a fixed frequency, the STM32L100C6U6 provides more explicit low-power design options. Actual energy savings must be measured with the final radio, sensor, regulator, and wake schedule.
Recommandé
Low-Power Control Boards
The STM32L100C6U6 is well suited to a compact, low-power control board that executes sequencing, debouncing, actuator decisions, and communications tasks. The 32-bit Cortex-M3 core handles control logic efficiently, and the low-power modes permit the board to remain mostly inactive between operator commands or sensor events. The 48-pin UFQFPN form factor supports dense assemblies, although its exposed pad and fine-pitch routing require careful PCB design. Compared with a higher-performance Cortex-M4-class MCU, this device offers a simpler low-power platform but offers only 32 KB of Flash and 4 KB of SRAM. Firmware architecture should therefore avoid unnecessary middleware and concurrent resource demand.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour STM32L100C6U6 — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | STM32L100C6U6A | STM32L100C8U6 | STM32L100CBU6 | STM32L151C6U6A | STM32L152C6U6A |
|---|---|---|---|---|---|---|
| Brand | STMicroelectronics | STMicroelectronics | STMicroelectronics | STMicroelectronics | STMicroelectronics | STMicroelectronics |
| Package | UFQFPN-48 | UFQFPN-48 - same | UFQFPN-48 - same | UFQFPN-48 - same | 48-pin UFQFPN - same | 48-pin UFQFPN - same |
| CPU Core | ARM Cortex-M3 | ARM Cortex-M3 | ARM Cortex-M3 | ARM Cortex-M3 | ARM Cortex-M3 | ARM Cortex-M3 |
| Maximum Frequency | 32 MHz | 32 MHz | 32 MHz | 32 MHz | 32 MHz | 32 MHz |
| Flash Memory | 32 KB | 32 KB | 64 KB | 128 KB | 32 KB | 32 KB |
Principaux différenciateurs
- Direct low-power USB integration in a compact controller (vs STM32L151C6U6A)
- Original STM32L100C6 family choice for validated designs (vs STM32L152C6U6A)
- Memory-balanced 32 KB Flash configuration (vs STM32L100C8U6)
Notes de conception
Design the supply around the manufacturer datasheet rather than the nominal 2.5 V or 3.3 V label alone. Confirm the minimum operating voltage for the selected clock, USB, ADC, and GPIO states, then include regulator tolerance and transient margin at the UFQFNN pin. For low-energy operation, measure current separately in run, sleep, standby, and USB-suspend modes; leakage can dominate a sensor-node budget even when active current is acceptable.
Use the official STM32L100C6 package drawing to define the 48-pin UFQFPN land pattern, exposed-pad connection, and paste-aperture dimensions. Do not infer the footprint from the package name. Place decoupling capacitors close to the associated supply pins, provide adequate thermal vias beneath the exposed pad, and maintain clean return paths. Because the supplied data does not include a complete pin table, the manufacturer PDF must be checked before routing power, ground, USB, clocks, and programming signals.
If the design uses USB, route the differential pair as a controlled-impedance structure with a continuous reference plane, minimized stubs, and symmetrical via transitions. Follow the datasheet and applicable USB implementation guidance for trace geometry and return-path continuity. Keep switching clocks and high-current peripherals away from sensitive analog inputs, and avoid routing USB signals across noisy power-regulator areas. USB functionality, bus-role support, and transceiver needs must be verified in the official datasheet.
Do not treat a matching package and Cortex-M3 core as proof that two STM32L1 devices are interchangeable. Compare alternate-device pin multiplexing, peripheral inventory, interrupt mapping, clock tree, USB behavior, low-power current, electrical limits, temperature grade, and firmware identifiers. Software may also require a different startup file, clock configuration, or peripheral driver. Perform a board-level smoke test and regression test before approving any substitute for production.
Informations de conformité
The supplied manufacturer and distributor snippets do not explicitly state RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals status. These fields remain unknown rather than being inferred from general STM32L1 family characteristics.
