STM8AL3166TC - 32KB Flash Automotive 8-bit MCU LQFP-32 | STMicroelectronics
料号： STM8AL3166TC ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $3.85 | $3.85 |
| 10 | $3.45 | $34.50 |
| 100 | $2.95 | $295.00 |
| 500 | $2.55 | $1,275.00 |
| 1,000 | $2.18 | $2,180.00 |
STM8AL3166TC 概述
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.
直接替换替代料： STM8AL3166TC ——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： STM8AL3166TC （相同外形与封装尺寸） ——差异在于 Package, Operating Temperature, Communication Interfaces, Connectivity, EEPROM Size.
快速对比工具——选择替代料号进行并排对比：
STM8AL3166TCY
✅ 直接替换📋 参考替代料（不在目录中）
STM8AL3168TA
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
STM8AL3166TAY
✅ 直接替换 ⚠️ 规格未核验✓ 有现货
$0.73 / 个
查看数据手册 →STM8L152R6T6A
✅ 直接替换📋 参考替代料（不在目录中）
STM8AL3L46TCY
✅ 直接替换 ⚠️ 规格未核验✓ 有现货
$1.45 / 个
查看数据手册 →STM8AL3166TC 最大额定值与电气特性
| Core Architecture | STM8 8-bit Harvard |
| Maximum CPU Frequency | 16 MHz |
| Program Memory (Flash) | 32 KB |
| RAM | 2 KB |
| Data EEPROM | 1024 B (emulated) |
| 封装 | LQFP-32 (7x7 mm) |
| 工作温度 | -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 |
| RoHS 状态 | Compliant |
| Lead-Free | Yes |
STM8AL3166TC 引脚配置
| 引脚 1 | PD1 — Port D bit 1 (general-purpose I/O, USART_TX alt) |
| 引脚 2 | PD2 — Port D bit 2 (general-purpose I/O) |
| 引脚 3 | PD3 — Port D bit 3 (general-purpose I/O) |
| 引脚 4 | PD4 — Port D bit 4 (USART_CK or LSCO alt) |
| 引脚 5 | PD5 — Port D bit 5 (general-purpose I/O) |
| 引脚 6 | PD6 — Port D bit 6 (general-purpose I/O) |
| 引脚 7 | PD7 — Port D bit 7 (general-purpose I/O) |
| 引脚 8 | NRST — Reset (active low) |
| 引脚 9 | VSS1 — Ground (digital) |
| 引脚 10 | VCAP — Decoupling cap for internal 1.8V regulator |
| 引脚 11 | VDD1 — Digital supply 1.65V-3.6V |
| 引脚 12 | PA0 — Port A bit 0 (ADC_IN0 / TIM2_CH1) |
| 引脚 13 | PA1 — Port A bit 1 (ADC_IN1 / TIM2_CH2) |
| 引脚 14 | PA2 — Port A bit 2 (ADC_IN2 / TIM2_CH3 / LSCO) |
| 引脚 15 | PA3 — Port A bit 3 (ADC_IN3 / TIM2_CH4) |
| 引脚 16 | PA4 — Port A bit 4 (ADC_IN4 / SPI_NSS) |
| 引脚 17 | PA5 — Port A bit 5 (ADC_IN5 / SPI_SCK) |
| 引脚 18 | PA6 — Port A bit 6 (ADC_IN6 / SPI_MISO) |
| 引脚 19 | PA7 — Port A bit 7 (ADC_IN7 / SPI_MOSI) |
| 引脚 20 | PB0 — Port B bit 0 (ADC_IN8 / TIM3_CH1) |
| 引脚 21 | PB1 — Port B bit 1 (ADC_IN9 / TIM3_CH2) |
| 引脚 22 | PB2 — Port B bit 2 (COMP1+ / I2C_SDA) |
| 引脚 23 | PB3 — Port B bit 3 (COMP1- / I2C_SCL) |
| 引脚 24 | PB4 — Port B bit 4 (TIM1_BKIN) |
| 引脚 25 | PB5 — Port B bit 5 (TIM1_CH1N / COMP2+) |
| 引脚 26 | PB6 — Port B bit 6 (TIM1_CH1 / COMP2-) |
| 引脚 27 | PB7 — Port B bit 7 (TIM1_CH2N) |
| 引脚 28 | PC0 — Port C bit 0 (USART1_RX / LIN) |
| 引脚 29 | PC1 — Port C bit 1 (USART1_TX) |
| 引脚 30 | OSCIN — Crystal oscillator input |
| 引脚 31 | OSCOUT — Crystal oscillator output |
| 引脚 32 | VSS2/VDD2 — Ground / Supply (analog ground and supply pair) |
典型应用
STM8AL3166TC 适用于 6 应用s: 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.
推荐
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.
推荐
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.
推荐
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.
推荐
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.
推荐
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.
推荐
推荐产品汇总
工程参考数据： STM8AL3166TC ——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 | 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 |
关键差异点
- AEC-Q100 Grade 1 qualified out of the box （对比 STM8L152R6T6A)
- Same 32 KB Flash/2 KB RAM with auto-grade LIN and RTC （对比 STM8L152R6T6A)
- Memory-tier upgrade with same footprint （对比 STM8AL3168TA)
设计说明
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.
合规信息
AEC-Q100 Grade 1 qualified per ST datasheet. RoHS/REACH compliant. Pb-free terminal finish.
