STM8AL3188TCY - 8-bit Ultra-Low-Power MCU 64KB Flash | STMicroelectronics
MPN: STM8AL3188TCY β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $4.32 | $4.32 |
| 10 | $3.89 | $38.90 |
| 100 | $3.46 | $346.00 |
| 500 | $3.11 | $1,555.00 |
| 1,000 | $2.77 | $2,770.00 |
Drop-in alternatives for STM8AL3188TCY 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:
STM8AL3L88TCY
β Drop-Inβ In Stock
$1.85 / Unit
View Datasheet βS9KEAZN64ACLH
β Drop-Inπ Reference alternative (not in catalog)
STM8AL3188TCY Maximum Ratings & Electrical Characteristics
| Core | STM8 8-bit CISC |
| Maximum Clock Frequency | 16 MHz |
| Flash Memory | 64 KB (64K x 8) |
| RAM Size | 4 KB |
| EEPROM Size | 2 KB |
| Number of I/O Pins | 41 |
| Supply Voltage Range | 1.8 V to 3.6 V |
| ADC Resolution | 12-bit |
| Number of ADC Channels | 25 |
| Communication Interfaces | SPI, I2C, UART |
| LCD Driver | 8x40 segments |
| Low-Power Modes | Halt, Active-Halt, Wait |
| Operating Temperature Range | -40Β°C to +85Β°C |
| Package | 48-LQFP (7x7 mm) |
| Mounting Type | Surface Mount |
| Automotive Qualification | AEC-Q100 |
STM8AL3188TCY Pin Configuration
| Pin 1 | VSS β Ground |
| Pin 2 | VDD β Power supply |
| Pin 3 | PA0 β General purpose I/O / ADC input |
| Pin 4 | PA1 β General purpose I/O / ADC input |
| Pin 5 | PA2 β General purpose I/O / ADC input |
| Pin 6 | PA3 β General purpose I/O / ADC input |
| Pin 7 | NRST β Reset (active low) |
| Pin 8 | VSS β Ground |
| Pin 9 | VDD β Power supply |
| Pin 10 | PB0 β General purpose I/O / SPI clock |
| Pin 11 | PB1 β General purpose I/O / SPI master out |
| Pin 12 | PB2 β General purpose I/O / SPI master in |
| Pin 13 | PB3 β General purpose I/O / SPI chip select |
| Pin 14 | PB4 β General purpose I/O / I2C clock |
| Pin 15 | PB5 β General purpose I/O / I2C data |
| Pin 16 | PB6 β General purpose I/O / UART TX |
| Pin 17 | PB7 β General purpose I/O / UART RX |
| Pin 18 | VSS β Ground |
| Pin 19 | VDD β Power supply |
| Pin 20 | PC0 β General purpose I/O / ADC input |
| Pin 21 | PC1 β General purpose I/O / ADC input |
| Pin 22 | PC2 β General purpose I/O / ADC input |
| Pin 23 | PC3 β General purpose I/O / ADC input |
| Pin 24 | PC4 β General purpose I/O / ADC input |
| Pin 25 | PC5 β General purpose I/O / ADC input |
| Pin 26 | PC6 β General purpose I/O / ADC input |
| Pin 27 | PC7 β General purpose I/O / ADC input |
| Pin 28 | VSS β Ground |
| Pin 29 | VDD β Power supply |
| Pin 30 | PD0 β General purpose I/O / LCD segment |
| Pin 31 | PD1 β General purpose I/O / LCD segment |
| Pin 32 | PD2 β General purpose I/O / LCD segment |
| Pin 33 | PD3 β General purpose I/O / LCD segment |
| Pin 34 | PD4 β General purpose I/O / LCD segment |
| Pin 35 | PD5 β General purpose I/O / LCD segment |
| Pin 36 | PD6 β General purpose I/O / LCD segment |
| Pin 37 | PD7 β General purpose I/O / LCD segment |
| Pin 38 | VSS β Ground |
| Pin 39 | VDD β Power supply |
| Pin 40 | PE0 β General purpose I/O / LCD segment |
| Pin 41 | PE1 β General purpose I/O / LCD segment |
| Pin 42 | PE2 β General purpose I/O / LCD segment |
| Pin 43 | PE3 β General purpose I/O / LCD segment |
| Pin 44 | PE4 β General purpose I/O / LCD segment |
| Pin 45 | PE5 β General purpose I/O / LCD segment |
| Pin 46 | PE6 β General purpose I/O / LCD segment |
| Pin 47 | PE7 β General purpose I/O / LCD segment |
| Pin 48 | VDD β Power supply |
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
STM8AL3188TCY is suitable for 6 applications: Smart Meters, Portable Medical Devices, Wireless Sensor Networks, Automotive Body Electronics, Industrial Monitoring, Battery-Powered Displays.
Smart Meters
The STM8AL3188TCY is ideal for smart gas, water, and electricity meters due to its ultra-low-power modes and integrated LCD driver. In a typical smart meter, the MCU wakes periodically from Halt mode to read sensors, process data, and update the display, consuming only 0.35 Β΅A in standby. The 12-bit ADC accurately measures flow or consumption, while the UART interface communicates with a wireless module for remote data collection. The wide operating temperature range ensures reliable operation in outdoor environments.
Recommended
Portable Medical Devices
The STM8AL3188TCY is well-suited for portable medical devices like glucose meters and pulse oximeters. Its low-power Halt mode extends battery life, critical for devices that must operate for months on a coin cell. The 12-bit ADC provides precise readings from biosensors, while the I2C interface connects to external sensor ICs. The LCD driver enables a compact display for patient readings. The AEC-Q100 qualification ensures reliability, though medical certification may require additional testing.
Recommended
Wireless Sensor Networks
The STM8AL3188TCY is an excellent choice for wireless sensor nodes in industrial and environmental monitoring. Its ultra-low-power modes allow battery-powered operation for years. The MCU collects data from various sensors via SPI or I2C, processes it locally, and transmits via a connected radio module. The 16 MHz clock provides sufficient processing power for data aggregation and protocol handling. The small 48-pin LQFP package fits compact node designs.
Recommended
Automotive Body Electronics
The STM8AL3188TCY is AEC-Q100 qualified, making it suitable for automotive body electronics such as window lifters, seat controllers, and lighting modules. Its 16 MHz core handles real-time control tasks, while the LIN interface (via UART) enables communication with the vehicle network. The wide operating temperature range (-40Β°C to +85Β°C) ensures reliable operation in harsh automotive environments. The low-power modes help reduce quiescent current draw when the vehicle is off.
Recommended
Industrial Monitoring
The STM8AL3188TCY is well-suited for industrial monitoring systems that track equipment status, environmental conditions, and process parameters. Its multiple communication interfaces (SPI, I2C, UART) allow connection to a variety of industrial sensors and actuators. The 12-bit ADC provides accurate analog measurements, while the low-power modes enable battery-backed operation in remote locations. The robust design and wide temperature range ensure reliable performance in factory environments.
Recommended
Battery-Powered Displays
The STM8AL3188TCY is ideal for battery-powered devices with displays, such as digital thermometers, hygrometers, and portable instruments. The integrated LCD driver supports up to 8x40 segments, eliminating the need for an external display driver IC. The ultra-low-power Halt mode with RTC running allows the device to maintain timekeeping and periodically update the display while consuming minimal current. This makes it perfect for devices that must operate for years on a single battery.
Recommended
Recommended Products Summary
Engineering reference data for STM8AL3188TCY β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | STM8AL3L88TCY | STM8AL3188TAY | S9KEAZN64ACLH |
|---|---|---|---|---|
| Package | 48-LQFP (7x7) | 48-LQFP (7x7) - same | 64-LQFP (10x10) - different | 48-LQFP (7x7) - same |
| Brand | STMicroelectronics | STMicroelectronics | STMicroelectronics | NXP Semiconductors |
| Core | STM8 8-bit CISC | STM8 8-bit CISC | STM8 8-bit CISC | ARM Cortex-M0+ |
| Maximum Clock Frequency | 16 MHz | 16 MHz | 16 MHz | 48 MHz |
| Flash Memory | 64 KB | 32 KB | 64 KB | 64 KB |
| RAM Size | 4 KB | 2 KB | 4 KB | 8 KB |
| EEPROM Size | 2 KB | 1 KB | 2 KB | 0 KB (simulated EEPROM) |
| ADC Resolution | 12-bit | 12-bit | 12-bit | 12-bit |
| Automotive Qualification | AEC-Q100 | AEC-Q100 | AEC-Q100 | AEC-Q100 |
Key Differentiators
- Integrated LCD driver supporting up to 8x40 segments (vs S9KEAZN64ACLH)
- True EEPROM for data storage (vs S9KEAZN64ACLH)
- Ultra-low-power Halt mode with 0.35 Β΅A current (vs STM8AL3L88TCY)
Design Notes
Decouple the VDD pins with a 100 nF ceramic capacitor placed as close to each pin as possible, and a 4.7 Β΅F bulk capacitor near the main power entry. The STM8AL3188TCY operates from 1.8V to 3.6V, so ensure the supply voltage stays within this range during transients. In low-power applications, use the Halt mode with RTC running to achieve 0.35 Β΅A current consumption, but ensure the RTC clock source is stable.
For the 48-pin LQFP package, use a 4-layer PCB with a solid ground plane beneath the MCU. Route high-speed signals (SPI, I2C) away from the crystal oscillator and analog inputs to minimize noise coupling. The exposed pad (if present) should be connected to ground with multiple vias for thermal and electrical performance. Follow ST's layout guidelines in the datasheet for optimal EMC performance.
Ensure the NRST pin is properly pulled up with a 10 kΞ© resistor and a 100 nF capacitor to ground to prevent spurious resets. When using the ADC, configure the sampling time appropriately for the source impedance of the sensor. Do not leave unused I/O pins floating; configure them as outputs or enable internal pull-ups to reduce leakage current and improve EMC.
Compliance Information
AEC-Q100 qualified for automotive applications. RoHS and REACH compliant per STMicroelectronics product page.
