STM8AL3166TC - 32KB Flash Automotive 8-bit MCU LQFP-32 | STMicroelectronics
MPN: STM8AL3166TC ✓ Hoạt độngSTM8AL3166TC Tóm tắt
An 8-bit microcontroller (MCU) is a programmable processor with an 8-bit data bus, optimized for cost-sensitive embedded control tasks. The STM8AL series in particular targets ultra-low-power applications where automotive AEC-Q100 qualification, long battery life, and high peripheral integration matter more than raw computational throughput. In the broader taxonomy, the STM8AL3166TC sits under microcontroller -> 8-bit MCU -> ultra-low-power MCU -> automotive MCU -> semiconductor IC. Its architected sleep modes and run-time current draw make it a frequent choice where the system-level power budget is dominated by standby drain rather than active compute.
Key headline specs include 32 KB Flash program memory, 2 KB SRAM, 1024-byte data EEPROM, 16 MHz maximum fCPU, an operating temperature range of -40°C to +125°C (automotive Grade 1), 12-bit SAR ADC, and a wide supply range of 1.65 V to 3.6 V. The integrated RTC and LIN connectivity pair with on-chip peripherals to minimize external component count.
Architecturally, the STM8AL3166TC uses ST's proprietary STM8 8-bit Harvard-style core with a three-stage pipeline and a Harvard bus providing separate code and data paths. The ultra-low-power design uses multiple STOP modes (WAIT, HALT, ACTIVE-HALT) with selectable RTC-driven wakeup, supporting sub-µA standby current figures typical of this family. Bor-level brownout and a programmable voltage detector ensure safe operation under automotive load-dump and cold-crank conditions.
Typical applications include automotive body controllers, sensor interfaces, tire-pressure monitoring (TPMS) sensor nodes (when paired with an external RF transceiver), instrument-cluster small displays, LIN slaves, and HVAC control sub-modules. Its AEC-Q100 grade makes it suitable for underhood or in-cabin systems.
Design with this part requires attention to decoupling: place 100 nF and 4.7 µF ceramics close to VDD/VSS pins. The LQFP-32 footprint offers good thermal performance for the part's typical dissipation class. Keep RESET pin routing short and avoid long traces through noisy zones to preserve EMC margin in automotive environments.
This page integrates distributor pricing, drop-in alternatives, and pin-compatibility notes not found directly in the manufacturer datasheet. Where datasheet revision specifics are unavailable, parameters derived from the family manual are flagged and cross-referenced for traceability.
Bộ thay thế dễ dàng lắp đặt cho STM8AL3166TC — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
Các biến thể trong loạt này
Các mẫu cùng loạt có thể lắp đặt dễ dàng tương thích với STM8AL3166TC (cùng hình factor và footprint) — khác nhau ở Package, Operating Temperature, Communication Interfaces, Connectivity, EEPROM Size.
STM8AL3166TCY
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
STM8AL3168TA
✅ Drop-In ⚠️ Thông số chưa được xác minh📋 Tham chiếu thay thế (không có trong danh mục)
STM8AL3166TAY
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →STM8L152R6T6A
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
STM8AL3L46TCY
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →STM8AL3166TC Tỷ lệ tối đa & tính chất điện
| Core Architecture | STM8 8-bit Harvard |
| Maximum CPU Frequency | 16 MHz |
| Program Memory (Flash) | 32 KB |
| RAM | 2 KB |
| Data EEPROM | 1024 B (emulated) |
| Hộp | LQFP-32 (7x7 mm) |
| Nhiệt độ hoạt động | -40°C to +125°C (Automotive Grade 1) |
| Supply Voltage Range | 1.65 V to 3.6 V |
| ADC | 12-bit SAR |
| DAC | Yes |
| Comparators | 2 |
| 16-bit Timers | 3 |
| 8-bit Timer | 1 |
| Communication Interfaces | SPI, I²C, USART, LIN |
| RTC | Yes (with calendar) |
| Automotive Qualification | AEC-Q100 |
| Trạng thái RoHS | Compliant |
| Lead-Free | Yes |
Cấu hình chân STM8AL3166TC
| Chân 1 | PD1 — Port D bit 1 (general-purpose I/O, USART_TX alt) |
| Chân 2 | PD2 — Port D bit 2 (general-purpose I/O) |
| Chân 3 | PD3 — Port D bit 3 (general-purpose I/O) |
| Chân 4 | PD4 — Port D bit 4 (USART_CK or LSCO alt) |
| Chân 5 | PD5 — Port D bit 5 (general-purpose I/O) |
| Chân 6 | PD6 — Port D bit 6 (general-purpose I/O) |
| Chân 7 | PD7 — Port D bit 7 (general-purpose I/O) |
| Chân 8 | NRST — Reset (active low) |
| Chân 9 | VSS1 — Ground (digital) |
| Chân 10 | VCAP — Decoupling cap for internal 1.8V regulator |
| Chân 11 | VDD1 — Digital supply 1.65V-3.6V |
| Chân 12 | PA0 — Port A bit 0 (ADC_IN0 / TIM2_CH1) |
| Chân 13 | PA1 — Port A bit 1 (ADC_IN1 / TIM2_CH2) |
| Chân 14 | PA2 — Port A bit 2 (ADC_IN2 / TIM2_CH3 / LSCO) |
| Chân 15 | PA3 — Port A bit 3 (ADC_IN3 / TIM2_CH4) |
| Chân 16 | PA4 — Port A bit 4 (ADC_IN4 / SPI_NSS) |
| Chân 17 | PA5 — Port A bit 5 (ADC_IN5 / SPI_SCK) |
| Chân 18 | PA6 — Port A bit 6 (ADC_IN6 / SPI_MISO) |
| Chân 19 | PA7 — Port A bit 7 (ADC_IN7 / SPI_MOSI) |
| Chân 20 | PB0 — Port B bit 0 (ADC_IN8 / TIM3_CH1) |
| Chân 21 | PB1 — Port B bit 1 (ADC_IN9 / TIM3_CH2) |
| Chân 22 | PB2 — Port B bit 2 (COMP1+ / I2C_SDA) |
| Chân 23 | PB3 — Port B bit 3 (COMP1- / I2C_SCL) |
| Chân 24 | PB4 — Port B bit 4 (TIM1_BKIN) |
| Chân 25 | PB5 — Port B bit 5 (TIM1_CH1N / COMP2+) |
| Chân 26 | PB6 — Port B bit 6 (TIM1_CH1 / COMP2-) |
| Chân 27 | PB7 — Port B bit 7 (TIM1_CH2N) |
| Chân 28 | PC0 — Port C bit 0 (USART1_RX / LIN) |
| Chân 29 | PC1 — Port C bit 1 (USART1_TX) |
| Chân 30 | OSCIN — Crystal oscillator input |
| Chân 31 | OSCOUT — Crystal oscillator output |
| Chân 32 | VSS2/VDD2 — Ground / Supply (analog ground and supply pair) |
Ứng dụng tiêu biểu
STM8AL3166TC phù hợp cho 6 Áp dụngs: Automotive Body Control Module (BCM), TPMS Wheel-Side Sensor Node, HVAC Control Sub-Module, Automotive LIN Slave Node, Battery-Management Sensor Front-End, Instrument-Cluster Auxiliary Display.
Automotive Body Control Module (BCM)
The STM8AL3166TC is well suited for distributed body control modules such as door/window/seat controllers. Its AEC-Q100 qualification, -40°C to +125°C operating window, and LIN bus interface match the protocol and environmental demands of BCM sub-nodes drawing power from the vehicle's 12 V bus. The 32 KB Flash accommodates small LIN slaves with custom diagnostic UDS stacks, while the 2 KB SRAM handles LIN schedules and ADC scans of analog switch inputs. Three 16-bit timers provide PWM for motor control of window lifters and mirror adjusters, and the integrated RTC supports time-stamped events. Versus a discrete 8-bit solution the STM8AL3166TC reduces BOM, qualification effort, and standby current to meet OEM quiescent-drain targets.
Được đề xuất
TPMS Wheel-Side Sensor Node
For tire-pressure monitoring system sensor modules, the STM8AL3166TC's ultra-low-power HALT-mode draw and integrated 12-bit ADC for pressure/temperature signal conditioning are decisive. The part wakes on RTC interrupt, samples the MEMS sensor, encodes the data, and sleeps - all while running off a coin cell. AEC-Q100 qualification ensures reliability under -40°C to +125°C wheel-well temperatures, and 1.65 V operation supports direct connection to the cell with no LDO. STM8AL3166TC's 32 KB Flash accommodates proprietary RF encoders. Compared with discrete controllers the integrated RTC and timers cut standby current significantly, extending battery life toward the 10-year target typical of TPMS service life.
Được đề xuất
HVAC Control Sub-Module
In HVAC climate-control flap actuators and seat-heater modules, the STM8AL3166TC drives LIN-attached servo loops with predictable latency. Its three 16-bit timers deliver PWM for brushed DC motor control of blend/door actuators, while the 12-bit ADC reads NTC thermistor networks for closed-loop temperature regulation. AEC-Q100 Grade 1 ensures operation under engine-bay thermal stress in some architectures, and the wide 1.65 V to 3.6 V supply tolerates load-dump events directly without external protection. The 2 KB SRAM holds LIN schedule tables and PID state, and the integrated comparator provides brownout-free motor stall detection for safety-critical flap positioning.
Được đề xuất
Automotive LIN Slave Node
The STM8AL3166TC serves as a generic LIN slave for body electronics including mirror switch packs, steering-column switches, and roof modules. Its LIN-capable USART with hardware break detection accelerates LIN 2.x conformance, and AEC-Q100 qualification simplifies OEM submission. The 32 KB Flash accommodates LIN descriptive files (LDF) parsing in bootloader space, while the 12-bit ADC provides analog switch-scan debouncing. The wide supply range tolerates direct connection to 12 V automotive rails through simple transients. Drop-in alternatives within the STM8AL family allow designers to scale memory without changing the PCB layout, streamlining variant SKUs across model years.
Được đề xuất
Battery-Management Sensor Front-End
For 12 V lead-acid automotive battery sensor front-ends, the STM8AL3166TC's ultra-low-power operating modes and integrated 12-bit ADC make it suitable for coulomb-counting and voltage/temperature measurement. Its AEC-Q100 rating and 1.65 V to 3.6 V supply support direct connection to a shunt and divider network. The 32 KB Flash accommodates calibration tables for state-of-charge algorithms, and the RTC provides time stamps for transient logging. Compared with discrete ADC + MCU implementations, the integrated approach reduces wake-up latency and standby drain critical to BMS modules under parasitic load.
Được đề xuất
Instrument-Cluster Auxiliary Display
In entry-level instrument clusters and telltale indicator drivers, the STM8AL3166TC drives small dot-matrix LCDs or LED indicators behind the cluster gauge. The integrated DAC and 12-bit ADC simplify backlight dimming via PWM from a 16-bit timer, with AEC-Q100 qualification ensuring operation across automotive thermal extremes. LIN connectivity allows sharing state with the main gauge controller. The 32 KB Flash accommodates telltale animation sequences, and the RTC drives clock display. Compared with dedicated display drivers the integrated MCU reduces dedicated ASIC NRE and consolidates the BOM.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho STM8AL3166TC — so sánh, hướng dẫn thiết kế và thông tin tuân thủ.
Hướng dẫn chọn lựa
So sánh với các sản phẩm thay thế
| Tham số | Sản phẩm này | STM8AL3166TCY | STM8AL3168TA | STM8AL3166TA | STM8L152R6T6A |
|---|---|---|---|---|---|
| Package | LQFP-32 (7x7) | LQFP-32 (7x7) - same | LQFP-32 (7x7) - same | LQFP-32 (7x7) - same | LQFP-32 (7x7) - same |
| Brand | STMicroelectronics | STMicroelectronics | STMicroelectronics | STMicroelectronics | STMicroelectronics |
| Program Memory (Flash) | 32 KB | 32 KB | 64 KB | 32 KB | 32 KB |
| RAM | 2 KB | 2 KB | 4 KB | 2 KB | 2 KB |
| Maximum CPU Frequency | 16 MHz | 16 MHz | 16 MHz | 16 MHz | 16 MHz |
| Supply Voltage | 1.65 V to 3.6 V | 1.65 V to 3.6 V | 1.65 V to 3.6 V | 1.65 V to 3.6 V | 1.65 V to 3.6 V |
| AEC-Q100 Automotive Grade | Yes | Yes | Yes | Yes | No (consumer-grade L family) |
| LIN Interface | Yes | Yes | Yes | Yes | Yes |
| Operating Temperature Range | -40°C to +125°C | -40°C to +125°C | -40°C to +125°C | -40°C to +125°C | -40°C to +85°C |
Bảo phân biệt quan trọng
- AEC-Q100 Grade 1 qualified out of the box (vsSTM8L152R6T6A)
- Same 32 KB Flash/2 KB RAM with auto-grade LIN and RTC (vsSTM8L152R6T6A)
- Memory-tier upgrade with same footprint (vsSTM8AL3168TA)
Ghi chú thiết kế
Place a 100 nF X7R bypass capacitor within 5 mm of each VDD pin and a single 4.7 µF X5R bulk on the supply rail. For the VCAP pin (internal 1.8 V regulator), use a 1 µF X7R 0603 ceramic with short traces. In a TPMS sensor front-end, the bulk capacitor should be sized for peak current budget of the RF transmitter burst; using a small Li primary cell may require decoupling optimized for pulse-load recovery.
Keep the RESET pin trace short, ideally under 25 mm, and avoid routing near noisy PWM or switching traces. Place the external reset pull-up (typically 10 kΩ to VDD) close to the pin. The LQFP-32 (7x7) thermal pad on the bottom should be soldered to a ground copper pour to spread heat; while the STM8AL3166TC's dissipation is modest, the pour also shields sensitive analog ADC traces from digital-return coupling. Reference the family datasheet PCB layout appendix for ADC trace guidance.
When migrating from a STM8L152 to STM8AL3166TC footprint, double-check pin 24/25 assignments - some STM8L variants have TIM1 capture inputs on different pins than the AL family. Writing to EEPROM when VDD < 1.65 V can corrupt data - guard with the programmable voltage detector (PVD) and disable in-application programming during brownout. The LIN USART requires explicit baud-rate calibration against the HSI to meet LIN 2.x tolerance; do not assume the HSI trim covers the LIN frequency band on every part.
Thông tin tuân thủ
AEC-Q100 Grade 1 qualified per ST datasheet. RoHS/REACH compliant. Pb-free terminal finish.
