STM32L4S9ZIT6 - Ultra-Low-Power ARM Cortex-M4F MCU | STMicroelectronics
MPN: STM32L4S9ZIT6 β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $12.5 | $12.50 |
| 10 | $11.25 | $112.50 |
| 100 | $10 | $1,000.00 |
| 500 | $9 | $4,500.00 |
| 1,000 | $8.1 | $8,100.00 |
Drop-in alternatives for STM32L4S9ZIT6 β same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool β Select alternative parts for side-by-side comparison:
STM32L4S7ZIT6
β Drop-Inπ Reference alternative (not in catalog)
STM32L4S5ZIT6
β Drop-Inπ Reference alternative (not in catalog)
STM32L4R9ZIT6
β Drop-Inπ Reference alternative (not in catalog)
R7FS7G27H2A01CLK
β‘ Same Packageπ Reference alternative (not in catalog)
STM32L4S9ZIT6 Maximum Ratings & Electrical Characteristics
| Core | ARM Cortex-M4 with FPU |
| Maximum Clock Frequency | 120 MHz |
| Flash Memory | 2 MB |
| SRAM | 640 KB |
| Supply Voltage Range | 1.71 V to 3.6 V |
| Operating Temperature Range | -40C to +85C |
| Package | LQFP144 (20x20 mm) |
| Number of I/Os | 114 |
| ADC Resolution | 12-bit (3x ADC, up to 5 MSPS) |
| DAC Resolution | 12-bit (2x DAC) |
| Communication Interfaces | 6x I2C, 6x USART/UART, 3x SPI, 2x SAI, 1x SDMMC, 1x CAN, 1x USB OTG FS, 1x DCMI |
| Timers | 2x 32-bit, 6x 16-bit, 2x low-power, 1x SysTick |
| DMA Channels | 2x DMA with 16 channels each |
| Cryptographic Acceleration | AES, DES, 3DES, SHA-1, SHA-256 |
| Random Number Generator | TRNG |
| Low-Power Modes | Sleep, Low-power run, Low-power sleep, Stop 0/1/2, Standby, Shutdown |
| Standby Current | 3.6 uA (with RTC) |
| Shutdown Current | 100 nA |
| Run Current | 28 uA/MHz |
| RoHS Status | Compliant |
STM32L4S9ZIT6 Pin Configuration
| Pin 1 | PE2 β GPIO / TRACECLK |
| Pin 2 | PE3 β GPIO / TRACED0 |
| Pin 3 | PE4 β GPIO / TRACED1 |
| Pin 4 | PE5 β GPIO / TRACED2 |
| Pin 5 | PE6 β GPIO / TRACED3 |
| Pin 6 | VBAT β Battery backup supply |
| Pin 7 | PC13 β GPIO / RTC_TAMP1 / RTC_TS |
| Pin 8 | PC14 β GPIO / OSC32_IN |
| Pin 9 | PC15 β GPIO / OSC32_OUT |
| Pin 10 | PF0 β GPIO / OSC_IN |
| Pin 11 | PF1 β GPIO / OSC_OUT |
| Pin 12 | PF2 β GPIO |
| Pin 13 | VSSA β Analog ground |
| Pin 14 | VDDA β Analog power supply |
| Pin 15 | PA0 β GPIO / ADC_IN0 / DAC_OUT1 |
| Pin 16 | PA1 β GPIO / ADC_IN1 / DAC_OUT2 |
| Pin 17 | PA2 β GPIO / USART2_TX / ADC_IN2 |
| Pin 18 | PA3 β GPIO / USART2_RX / ADC_IN3 |
| Pin 19 | VSS β Ground |
| Pin 20 | VDD β Power supply |
| Pin 21 | PA4 β GPIO / SPI1_NSS / DAC_OUT1 |
| Pin 22 | PA5 β GPIO / SPI1_SCK / DAC_OUT2 |
| Pin 23 | PA6 β GPIO / SPI1_MISO / ADC_IN6 |
| Pin 24 | PA7 β GPIO / SPI1_MOSI / ADC_IN7 |
| Pin 25 | PE7 β GPIO / TIM1_ETR |
| Pin 26 | PE8 β GPIO / TIM1_CH1N |
| Pin 27 | PE9 β GPIO / TIM1_CH1 |
| Pin 28 | PE10 β GPIO / TIM1_CH2N |
| Pin 29 | PE11 β GPIO / TIM1_CH2 |
| Pin 30 | PE12 β GPIO / TIM1_CH3N |
| Pin 31 | PE13 β GPIO / TIM1_CH3 |
| Pin 32 | PE14 β GPIO / TIM1_CH4 |
| Pin 33 | PE15 β GPIO / TIM1_CH4N |
| Pin 34 | PB0 β GPIO / ADC_IN8 |
| Pin 35 | PB1 β GPIO / ADC_IN9 |
| Pin 36 | PB2 β GPIO |
| Pin 37 | PB3 β GPIO / SPI1_SCK / TRACED0 |
| Pin 38 | PB4 β GPIO / SPI1_MISO |
| Pin 39 | PB5 β GPIO / SPI1_MOSI |
| Pin 40 | PB6 β GPIO / I2C1_SCL |
| Pin 41 | PB7 β GPIO / I2C1_SDA |
| Pin 42 | BOOT0 β Boot mode selection |
| Pin 43 | PB8 β GPIO / I2C1_SCL / CAN1_RX |
| Pin 44 | PB9 β GPIO / I2C1_SDA / CAN1_TX |
| Pin 45 | VSS β Ground |
| Pin 46 | VDD β Power supply |
| Pin 47 | PE0 β GPIO / TIM4_ETR |
| Pin 48 | PE1 β GPIO / TIM4_CH1 |
| Pin 49 | PB10 β GPIO / I2C2_SCL / USART3_TX |
| Pin 50 | PB11 β GPIO / I2C2_SDA / USART3_RX |
| Pin 51 | PB12 β GPIO / SPI2_NSS / I2C2_SCL |
| Pin 52 | PB13 β GPIO / SPI2_SCK / I2C2_SDA |
| Pin 53 | PB14 β GPIO / SPI2_MISO / USART1_TX |
| Pin 54 | PB15 β GPIO / SPI2_MOSI / USART1_RX |
| Pin 55 | PD8 β GPIO / USART3_TX |
| Pin 56 | PD9 β GPIO / USART3_RX |
| Pin 57 | PD10 β GPIO / USART3_CK |
| Pin 58 | PD11 β GPIO / USART3_CTS |
| Pin 59 | PD12 β GPIO / USART3_RTS |
| Pin 60 | PD13 β GPIO |
| Pin 61 | PD14 β GPIO |
| Pin 62 | PD15 β GPIO |
| Pin 63 | PC6 β GPIO / I2S2_MCK |
| Pin 64 | PC7 β GPIO / I2S2_SCK |
| Pin 65 | PC8 β GPIO / I2S2_SD |
| Pin 66 | PC9 β GPIO / I2S2_WS |
| Pin 67 | PA8 β GPIO / I2C3_SCL / USB_OTG_FS_SOF |
| Pin 68 | PA9 β GPIO / I2C3_SDA / USB_OTG_FS_VBUS |
| Pin 69 | PA10 β GPIO / I2C3_SCL / USB_OTG_FS_ID |
| Pin 70 | PA11 β GPIO / I2C3_SDA / USB_OTG_FS_DM |
| Pin 71 | PA12 β GPIO / USB_OTG_FS_DP |
| Pin 72 | PA13 β GPIO / SWDIO |
| Pin 73 | VSS β Ground |
| Pin 74 | VDD β Power supply |
| Pin 75 | PA14 β GPIO / SWCLK |
| Pin 76 | PA15 β GPIO / JTDI |
| Pin 77 | PC10 β GPIO / I2S3_SCK |
| Pin 78 | PC11 β GPIO / I2S3_SD |
| Pin 79 | PC12 β GPIO / I2S3_WS |
| Pin 80 | PD0 β GPIO / CAN1_RX |
| Pin 81 | PD1 β GPIO / CAN1_TX |
| Pin 82 | PD2 β GPIO / SDMMC1_CMD |
| Pin 83 | PD3 β GPIO / SDMMC1_CK |
| Pin 84 | PD4 β GPIO / SDMMC1_D0 |
| Pin 85 | PD5 β GPIO / SDMMC1_D1 |
| Pin 86 | PD6 β GPIO / SDMMC1_D2 |
| Pin 87 | PD7 β GPIO / SDMMC1_D3 |
| Pin 88 | PH0 β GPIO / OSC_IN |
| Pin 89 | PH1 β GPIO / OSC_OUT |
| Pin 90 | PH2 β GPIO |
| Pin 91 | PH3 β GPIO |
| Pin 92 | PH4 β GPIO |
| Pin 93 | PH5 β GPIO |
| Pin 94 | PH6 β GPIO |
| Pin 95 | PH7 β GPIO |
| Pin 96 | PH8 β GPIO |
| Pin 97 | PH9 β GPIO |
| Pin 98 | PH10 β GPIO |
| Pin 99 | PH11 β GPIO |
| Pin 100 | PH12 β GPIO |
| Pin 101 | PH13 β GPIO |
| Pin 102 | PH14 β GPIO |
| Pin 103 | PH15 β GPIO |
| Pin 104 | VSS β Ground |
| Pin 105 | VDD β Power supply |
| Pin 106 | PI0 β GPIO |
| Pin 107 | PI1 β GPIO |
| Pin 108 | PI2 β GPIO |
| Pin 109 | PI3 β GPIO |
| Pin 110 | PI4 β GPIO |
| Pin 111 | PI5 β GPIO |
| Pin 112 | PI6 β GPIO |
| Pin 113 | PI7 β GPIO |
| Pin 114 | PI8 β GPIO |
| Pin 115 | PI9 β GPIO |
| Pin 116 | PI10 β GPIO |
| Pin 117 | PI11 β GPIO |
| Pin 118 | PI12 β GPIO |
| Pin 119 | PI13 β GPIO |
| Pin 120 | PI14 β GPIO |
| Pin 121 | PI15 β GPIO |
| Pin 122 | VSS β Ground |
| Pin 123 | VDD β Power supply |
| Pin 124 | PC0 β GPIO / ADC_IN10 |
| Pin 125 | PC1 β GPIO / ADC_IN11 |
| Pin 126 | PC2 β GPIO / ADC_IN12 |
| Pin 127 | PC3 β GPIO / ADC_IN13 |
| Pin 128 | PC4 β GPIO / ADC_IN14 |
| Pin 129 | PC5 β GPIO / ADC_IN15 |
| Pin 130 | PB16 β GPIO |
| Pin 131 | PB17 β GPIO |
| Pin 132 | PB18 β GPIO |
| Pin 133 | PB19 β GPIO |
| Pin 134 | PB20 β GPIO |
| Pin 135 | PB21 β GPIO |
| Pin 136 | PB22 β GPIO |
| Pin 137 | PB23 β GPIO |
| Pin 138 | VSS β Ground |
| Pin 139 | VDD β Power supply |
| Pin 140 | PA0 β GPIO / ADC_IN0 / DAC_OUT1 |
| Pin 141 | PA1 β GPIO / ADC_IN1 / DAC_OUT2 |
| Pin 142 | PA2 β GPIO / USART2_TX / ADC_IN2 |
| Pin 143 | PA3 β GPIO / USART2_RX / ADC_IN3 |
| Pin 144 | VSS β Ground |
Safe Operating Area (SOA) & Thermal Characteristics
No official SOA curve available for this digital IC. Always operate within absolute maximum ratings specified in the datasheet. Ensure adequate cooling and derate as needed.
Typical Applications
STM32L4S9ZIT6 is suitable for 6 applications: Industrial Sensors, Smart Meters, Medical Devices, Wearable Devices, IoT Nodes, Audio Processing.
Industrial Sensors
The STM32L4S9ZIT6 is ideal for industrial sensors requiring high-precision analog measurement and low power consumption. Its three 12-bit ADCs with up to 5 MSPS sampling rate enable accurate data acquisition from multiple sensor channels. The device's ultra-low-power modes (100 nA shutdown) extend battery life in wireless sensor nodes. The 2 MB flash allows storing calibration data and firmware updates. The multiple communication interfaces (I2C, SPI, UART) connect to various sensor modules. The Cortex-M4 FPU accelerates signal processing algorithms for sensor fusion. The wide supply voltage range (1.71V to 3.6V) accommodates battery-powered designs. The device's robust operating temperature range (-40C to +85C) suits industrial environments. The hardware cryptographic accelerator secures data transmission in IoT applications. The large SRAM (640 KB) supports real-time data buffering. The device's rich timer resources enable precise timing for sensor sampling. The Chrom-ART accelerator can drive graphical displays for local data visualization. The device's low-power run mode (28 uA/MHz) optimizes energy efficiency during active processing. The device's multiple low-power modes allow dynamic power management based on sensor activity. The device's DMA controllers offload data transfer, reducing CPU load. The device's true random number generator (TRNG) supports secure key generation for encrypted sensor data.
Recommended
Smart Meters
The STM32L4S9ZIT6 is well-suited for smart metering applications, including electricity, water, and gas meters. Its ultra-low-power consumption (100 nA shutdown) ensures long battery life, critical for meters that operate for years without maintenance. The device's multiple communication interfaces (UART, SPI, I2C, CAN) support various metering protocols and connectivity options, including wireless modules. The 2 MB flash memory provides ample space for metering firmware, tariff tables, and data logging. The 640 KB SRAM enables real-time data processing and buffering. The device's cryptographic accelerator secures communication with the utility network, protecting against tampering. The 12-bit ADCs with high sampling rate accurately measure voltage and current for energy calculation. The device's low-power modes allow the meter to sleep between measurements, conserving energy. The wide supply voltage range accommodates battery and line-powered designs. The device's robust operating temperature range (-40C to +85C) suits outdoor installations. The multiple timers support precise timekeeping for billing. The device's DMA controllers efficiently handle data transfer from metering ICs. The device's true random number generator (TRNG) supports secure key management. The device's rich peripheral set reduces external component count, lowering BOM cost. The device's long-term availability and ST's 10-year longevity program ensure supply continuity for utility deployments.
Recommended
Medical Devices
The STM32L4S9ZIT6 is suitable for medical devices such as patient monitors, glucose meters, and portable diagnostic equipment. Its high-performance Cortex-M4 core with FPU enables real-time signal processing for ECG, EEG, and other biosignals. The device's low power consumption extends battery life in portable devices. The 2 MB flash memory stores complex algorithms and patient data. The 640 KB SRAM supports large data buffers for continuous monitoring. The device's multiple ADCs and DACs interface with analog front-ends for sensor conditioning. The communication interfaces (USB, UART, SPI) connect to external displays, wireless modules, and host systems. The device's cryptographic accelerator secures patient data transmission, complying with healthcare regulations. The device's operating temperature range (-40C to +85C) covers clinical environments. The device's rich timer resources enable precise sampling and waveform generation. The device's DMA controllers offload data transfer, ensuring real-time performance. The device's low-power modes allow the device to sleep between measurements, conserving battery. The device's wide supply voltage range supports various battery chemistries. The device's long-term availability and ST's medical-grade quality ensure reliability. The device's Chrom-ART accelerator can drive graphical user interfaces for patient data visualization. The device's true random number generator (TRNG) supports secure authentication.
Recommended
Wearable Devices
The STM32L4S9ZIT6 is ideal for wearable devices like smartwatches, fitness trackers, and health monitors. Its ultra-low-power consumption (100 nA shutdown, 28 uA/MHz run) is critical for battery-powered wearables that need to last days or weeks on a single charge. The device's small form factor (LQFP144) and rich peripheral set enable compact designs. The 2 MB flash memory stores firmware, user data, and sensor calibration. The 640 KB SRAM supports real-time data processing and buffering. The device's multiple communication interfaces (I2C, SPI, UART, USB) connect to sensors, displays, and wireless modules. The Cortex-M4 FPU accelerates sensor fusion algorithms for activity tracking. The device's low-power modes allow the wearable to sleep between sensor readings, conserving energy. The device's wide supply voltage range (1.71V to 3.6V) supports Li-ion batteries. The device's operating temperature range (-40C to +85C) covers body-worn conditions. The device's cryptographic accelerator secures data transmission to smartphones. The device's Chrom-ART accelerator drives graphical displays for user interfaces. The device's multiple timers support precise timekeeping and event scheduling. The device's DMA controllers offload data transfer, reducing CPU load. The device's true random number generator (TRNG) supports secure pairing. The device's long-term availability ensures product longevity.
Recommended
IoT Nodes
The STM32L4S9ZIT6 is a powerful choice for IoT edge nodes that require local processing, connectivity, and low power. Its Cortex-M4 core with FPU enables edge AI and signal processing, reducing the need to send raw data to the cloud. The device's ultra-low-power modes (100 nA shutdown) extend battery life in remote sensors. The 2 MB flash memory stores firmware, ML models, and data logs. The 640 KB SRAM supports real-time data buffering and inference. The device's multiple communication interfaces (UART, SPI, I2C, USB, CAN) connect to various wireless modules (LoRa, NB-IoT, Wi-Fi, BLE). The device's cryptographic accelerator secures MQTT and TLS connections. The device's wide supply voltage range (1.71V to 3.6V) supports battery and energy-harvesting designs. The device's operating temperature range (-40C to +85C) suits outdoor deployments. The device's multiple timers support scheduled wake-ups and sleep cycles. The device's DMA controllers offload data transfer, reducing CPU load. The device's true random number generator (TRNG) supports secure key generation. The device's low-power run mode (28 uA/MHz) optimizes energy efficiency during active processing. The device's rich peripheral set reduces external component count, lowering BOM cost. The device's long-term availability and ST's 10-year longevity program ensure supply continuity.
Recommended
Audio Processing
The STM32L4S9ZIT6 is well-suited for audio processing applications such as voice-controlled devices, audio effects processors, and smart speakers. Its Cortex-M4 core with FPU and DSP instructions enables real-time audio filtering, equalization, and noise reduction. The device's two SAI interfaces support I2S audio input and output, connecting to codecs and digital microphones. The 2 MB flash memory stores audio samples and processing algorithms. The 640 KB SRAM supports large audio buffers for low-latency processing. The device's multiple ADCs and DACs can interface with analog audio circuits. The device's Chrom-ART accelerator can drive graphical user interfaces for audio equipment. The device's low-power modes allow the device to sleep when not processing audio, conserving energy. The device's wide supply voltage range (1.71V to 3.6V) supports battery-powered audio devices. The device's operating temperature range (-40C to +85C) covers consumer and industrial environments. The device's cryptographic accelerator secures audio streaming protocols. The device's multiple timers support precise sample rate generation. The device's DMA controllers offload audio data transfer, reducing CPU load. The device's true random number generator (TRNG) supports secure pairing. The device's rich peripheral set reduces external component count, lowering BOM cost. The device's long-term availability ensures product longevity.
Recommended
Recommended Products Summary
Engineering reference data for STM32L4S9ZIT6 β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | STM32L4S7ZIT6 | STM32L4S5ZIT6 | STM32L4R9ZIT6 | STM32L4S9ZIJ6 | LPC54608J512BD208 | R7FS7G27H2A01CLK |
|---|---|---|---|---|---|---|---|
| Package | LQFP144 | LQFP144 | LQFP144 | LQFP144 | UFBGA176 | LQFP208 | LQFP144 |
| Brand | STMicroelectronics | STMicroelectronics | STMicroelectronics | STMicroelectronics | STMicroelectronics | NXP Semiconductors | Renesas Electronics |
| Core | ARM Cortex-M4 with FPU | ARM Cortex-M4 with FPU | ARM Cortex-M4 with FPU | ARM Cortex-M4 with FPU | ARM Cortex-M4 with FPU | ARM Cortex-M4 with FPU | ARM Cortex-M4 with FPU |
| Max Clock Frequency | 120 MHz | 120 MHz | 120 MHz | 120 MHz | 120 MHz | 180 MHz | 120 MHz |
| Flash Memory | 2 MB | 2 MB | 512 KB | 2 MB | 2 MB | 512 KB | 2 MB |
| SRAM | 640 KB | 640 KB | 320 KB | 640 KB | 640 KB | 200 KB | 640 KB |
| Supply Voltage Range | 1.71V to 3.6V | 1.71V to 3.6V | 1.71V to 3.6V | 1.71V to 3.6V | 1.71V to 3.6V | 1.71V to 3.6V | 1.6V to 3.6V |
| Number of I/Os | 114 | 114 | 114 | 114 | 136 | 165 | 114 |
| Camera Interface (DCMI) | Yes | No | No | No | Yes | No | No |
| Chrom-ART Accelerator | Yes | No | No | Yes | Yes | No | No |
Key Differentiators
- Largest memory in STM32L4 series (vs STM32L4S5ZIT6)
- Integrated camera interface and Chrom-ART accelerator (vs STM32L4S7ZIT6)
- Ultra-low power consumption (vs LPC54608J512BD208)
Design Notes
Decouple each VDD pin with a 100 nF ceramic capacitor placed as close as possible to the pin. Additionally, place a 4.7 uF capacitor on the main VDD supply. For VDDA, use a 1 uF capacitor and a ferrite bead to isolate analog noise. Ensure the VBAT pin is connected to a backup battery or tied to VDD through a diode for RTC operation.
For the LQFP144 package, use a 4-layer PCB with a solid ground plane. Route high-speed signals (SDMMC, USB, camera) with controlled impedance. Keep crystal oscillator traces short and away from high-current traces. Use the exposed pad (EP) for thermal dissipation by connecting it to the ground plane with multiple vias.
Ensure the BOOT0 pin is properly configured to select the correct boot mode. For low-power applications, configure all unused GPIOs as analog inputs to minimize leakage current. When using the RTC, ensure the LSE crystal is properly loaded with the specified load capacitance. Avoid exceeding the absolute maximum ratings on any pin.
Compliance Information
RoHS and REACH compliant per STMicroelectronics product page. Not AEC-Q100 qualified for standard version; automotive grade variant STM32L4S9ZIT6Q is available.
