STMicroelectronics

STM8AL3L88TCY - 8-bit Ultra-Low-Power MCU, 64KB Flash | STMicroelectronics

Name: STM8AL3L88TCY
Brand: STMicroelectronics
Price: 3.25 USD
Availability: InStock

MPN: STM8AL3L88TCY ✓ Active

In Stock (99,999) Ships in 1-3 business days

1.8 V to 3.6 V Vdss 0.35 µA Id LQFP-48 (TCY) Package 16 MHz Speed 64 KB Memory

$3.25 USD / Unit

MOQ: 1 |

Volume Pricing

Qty	Unit Price	Extended
1	$3.25	$3.25
10	$2.95	$29.50
100	$2.45	$245.00
500	$2.1	$1,050.00
1,000	$1.85	$1,850.00

ℹ️ All prices are in USD

View Datasheet (PDF) View Alternatives

Quantity

Drop-in alternatives for STM8AL3L88TCY — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.

Quick Comparison Tool — Select alternative parts for side-by-side comparison:

STM8L151C8T6

✅ Drop-In

📦 LQFP-48

same LQFP-48 package, but higher power consumption and different peripheral set

📋 Reference alternative (not in catalog)

STM8L151C6T6

✅ Drop-In

📦 LQFP-48

same LQFP-48 package, 32KB Flash, lower memory

📋 Reference alternative (not in catalog)

STM8L152C8T6

✅ Drop-In

📦 LQFP-48

same LQFP-48 package, includes LCD driver, higher power

📋 Reference alternative (not in catalog)

ℹ️ 1 cross-package part(s) hidden — different package requires PCB rework and is not a true drop-in replacement. Contact us if you need cross-package suggestions.

STM8AL3L88TCY Maximum Ratings & Electrical Characteristics

Core	STM8 8-bit
Maximum Clock Frequency	16 MHz
Flash Memory	64 KB
RAM	4 KB
EEPROM	2 KB
Operating Voltage	1.8 V to 3.6 V
Package	LQFP-48 (TCY)
ADC Resolution	12-bit
ADC Channels	25
Comparators	2
Communication Interfaces	SPI, I2C, USART
Low-Power Modes	Wait, Active-Halt, Halt
Halt Mode Current	0.35 µA
Operating Temperature	-40°C to +85°C
RoHS Status	Compliant

STM8AL3L88TCY Pin Configuration

Pin 1	VDD — Power supply
Pin 2	VSS — Ground
Pin 3	PA0 — General purpose I/O / ADC input
Pin 4	PA1 — General purpose I/O / ADC input
Pin 5	PA2 — General purpose I/O / ADC input
Pin 6	PA3 — General purpose I/O / ADC input
Pin 7	NRST — Reset (active low)
Pin 8	VSS — Ground
Pin 9	VDD — Power supply
Pin 10	PB0 — General purpose I/O / SPI clock
Pin 11	PB1 — General purpose I/O / SPI MISO
Pin 12	PB2 — General purpose I/O / SPI MOSI
Pin 13	PB3 — General purpose I/O / SPI chip select
Pin 14	PB4 — General purpose I/O / I2C SCL
Pin 15	PB5 — General purpose I/O / I2C SDA
Pin 16	PB6 — General purpose I/O / USART TX
Pin 17	PB7 — General purpose I/O / USART RX
Pin 18	VSS — Ground
Pin 19	VDD — Power supply
Pin 20	PC0 — General purpose I/O / ADC input
Pin 21	PC1 — General purpose I/O / ADC input
Pin 22	PC2 — General purpose I/O / ADC input
Pin 23	PC3 — General purpose I/O / ADC input
Pin 24	PC4 — General purpose I/O / ADC input
Pin 25	PC5 — General purpose I/O / ADC input
Pin 26	PC6 — General purpose I/O / ADC input
Pin 27	PC7 — General purpose I/O / ADC input
Pin 28	VSS — Ground
Pin 29	VDD — Power supply
Pin 30	PD0 — General purpose I/O / USART CK
Pin 31	PD1 — General purpose I/O / USART RTS
Pin 32	PD2 — General purpose I/O / USART CTS
Pin 33	PD3 — General purpose I/O / timer input
Pin 34	PD4 — General purpose I/O / timer output
Pin 35	PD5 — General purpose I/O / timer output
Pin 36	PD6 — General purpose I/O / timer output
Pin 37	PD7 — General purpose I/O / timer output
Pin 38	VSS — Ground
Pin 39	VDD — Power supply
Pin 40	PE0 — General purpose I/O / ADC input
Pin 41	PE1 — General purpose I/O / ADC input
Pin 42	PE2 — General purpose I/O / ADC input
Pin 43	PE3 — General purpose I/O / ADC input
Pin 44	PE4 — General purpose I/O / ADC input
Pin 45	PE5 — General purpose I/O / ADC input
Pin 46	PE6 — General purpose I/O / ADC input
Pin 47	PE7 — General purpose I/O / ADC input
Pin 48	VSS — 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

STM8AL3L88TCY is suitable for 6 applications: Smart Metering, Portable Medical Devices, Industrial Sensors, Building Automation, Wireless Sensor Networks, Portable Consumer Electronics.

⚡

Smart Metering

The STM8AL3L88TCY is ideal for smart meters due to its ultra-low-power consumption (0.35 µA in Halt mode) and integrated 12-bit ADC for accurate measurement. It can operate for years on battery power while periodically waking to record consumption. The EEPROM stores calibration data and usage history without external memory. Communication interfaces (SPI, I2C, USART) enable connectivity with PLC or RF modules for data transmission. The wide operating voltage (1.8V-3.6V) accommodates battery voltage variations. In a typical smart meter, the MCU reads current and voltage sensors via the ADC, processes the data, and communicates readings to a central system. The low-power modes ensure minimal energy drain between measurements, extending battery life to 10+ years. Design considerations include using the RTC for scheduled wake-ups and optimizing ADC sampling to balance accuracy and power.

Recommended

STM8AL3L88TAY (Higher pin count variant for expanded I/O) SPIRIT1 (RF transceiver for wireless communication)

💊

Portable Medical Devices

The STM8AL3L88TCY is well-suited for portable medical devices like glucose meters and pulse oximeters. Its ultra-low-power operation extends battery life, critical for patient convenience. The 12-bit ADC provides precise sensor readings, and the EEPROM stores patient data securely. The device's small LQFP-48 package fits compact designs. In a glucose meter, the MCU reads the sensor via the ADC, calculates glucose levels, and displays results on an LCD. The low-power modes allow the device to remain in standby for months. The integrated comparators can detect sensor faults. Design considerations include using the RTC for timed measurements and ensuring EMC compliance for medical environments. The wide temperature range (-40°C to +85°C) ensures reliable operation in various conditions.

Recommended

STM8L151C8T6 (Alternative with similar features) LM75 (Temperature sensor for patient monitoring)

🏭

Industrial Sensors

The STM8AL3L88TCY is ideal for industrial sensors such as pressure, temperature, and flow sensors. Its robust design operates from -40°C to +85°C, and the 12-bit ADC interfaces directly with analog sensors. The multiple communication interfaces (SPI, I2C, USART) allow connection to industrial networks like Modbus. The ultra-low-power modes enable battery-powered wireless sensors. In a typical pressure sensor, the MCU reads the sensor via the ADC, applies calibration coefficients from EEPROM, and transmits data over RS-485. The device's ESD protection ensures reliability in harsh environments. Design considerations include proper decoupling and using the watchdog timer for fault recovery. The wide voltage range supports 24V industrial supplies with a regulator.

Recommended

STM8L152C8T6 (Variant with LCD driver for local display) MCP9808 (I2C temperature sensor for compensation)

🧩

Building Automation

The STM8AL3L88TCY is used in building automation for HVAC control, lighting, and security systems. Its low-power operation is ideal for battery-powered sensors and actuators. The integrated RTC enables scheduled events, and the communication interfaces support BACnet or KNX protocols via external transceivers. In a smart thermostat, the MCU reads temperature sensors, controls relays for heating/cooling, and communicates with a central controller. The EEPROM stores user settings and schedules. The device's multiple timers can generate PWM for fan speed control. Design considerations include using the low-power modes during idle periods and ensuring proper isolation for safety. The wide operating voltage allows direct connection to 3.3V logic.

Recommended

STM8AL3L88TAY (More I/O for complex automation) SHT30 (Humidity/temperature sensor for climate control)

🌐

Wireless Sensor Networks

The STM8AL3L88TCY is perfect for wireless sensor nodes in IoT applications. Its ultra-low-power consumption (0.35 µA Halt) allows battery-powered nodes to last years. The MCU wakes periodically to read sensors, process data, and transmit via an external RF module. The SPI interface connects to sub-GHz or 2.4GHz transceivers. In a typical node, the MCU reads a temperature sensor, formats the data, and sends it over SPI to a radio. The EEPROM stores node ID and configuration. The device's low-power modes are crucial for energy harvesting applications. Design considerations include minimizing active time and using the RTC for scheduled wake-ups. The wide voltage range supports various battery chemistries.

Recommended

SPIRIT1 (Sub-GHz RF transceiver for wireless communication) SX1276 (LoRa transceiver for long-range IoT)

📱

Portable Consumer Electronics

The STM8AL3L88TCY is used in portable consumer devices like fitness trackers and remote controls. Its small package and low power consumption are ideal for wearable designs. The 12-bit ADC can interface with accelerometers and heart rate sensors. The EEPROM stores user profiles and settings. In a fitness tracker, the MCU reads motion sensors, counts steps, and displays data on an OLED. The low-power modes allow the device to run for weeks on a coin cell. The communication interfaces enable Bluetooth connectivity via an external module. Design considerations include optimizing the ADC sampling rate and using the RTC for timekeeping. The wide temperature range ensures operation in various climates.

Recommended

STM8L151C6T6 (Lower memory variant for cost-sensitive designs) LSM6DS3 (Accelerometer/gyroscope for motion tracking)

Recommended Products Summary

STM8AL3L88TAY Higher pin count variant for expanded I/O Used in: Smart Metering, Building Automation SPIRIT1 RF transceiver for wireless communication Used in: Smart Metering, Wireless Sensor Networks STM8L151C8T6 Alternative with similar features Used in: Portable Medical Devices LM75 Temperature sensor for patient monitoring Used in: Portable Medical Devices STM8L152C8T6 Variant with LCD driver for local display Used in: Industrial Sensors MCP9808 I2C temperature sensor for compensation Used in: Industrial Sensors SHT30 Humidity/temperature sensor for climate control Used in: Building Automation SX1276 LoRa transceiver for long-range IoT Used in: Wireless Sensor Networks STM8L151C6T6 Lower memory variant for cost-sensitive designs Used in: Portable Consumer Electronics LSM6DS3 Accelerometer/gyroscope for motion tracking Used in: Portable Consumer Electronics

What is the operating voltage range of STM8AL3L88TCY?

The STM8AL3L88TCY operates from 1.8V to 3.6V. According to the STM8AL3L88 datasheet, this wide range supports battery-powered applications with varying supply levels.

How much Flash memory does STM8AL3L88TCY have?

The STM8AL3L88TCY has 64 KB of Flash memory. This is sufficient for complex firmware in applications like smart meters and industrial sensors.

What is the maximum clock frequency of STM8AL3L88TCY?

The STM8AL3L88TCY operates at a maximum clock frequency of 16 MHz. This provides up to 16 MIPS performance for real-time control tasks.

What low-power modes are available on STM8AL3L88TCY?

The STM8AL3L88TCY offers Wait, Active-Halt, and Halt low-power modes. In Halt mode, current consumption drops to 0.35 µA, ideal for battery-powered devices.

Does STM8AL3L88TCY have an ADC?

Yes, the STM8AL3L88TCY includes a 12-bit ADC with up to 25 channels. This allows precise analog sensor interfacing without external ADC chips.

What communication interfaces does STM8AL3L88TCY support?

The STM8AL3L88TCY supports SPI, I2C, and USART interfaces. These enable connectivity with sensors, displays, and other microcontrollers.

What is the package type of STM8AL3L88TCY?

The STM8AL3L88TCY is available in a 48-pin LQFP package (TCY suffix). This surface-mount package is suitable for compact PCB designs.

Is STM8AL3L88TCY suitable for battery-powered applications?

Yes, the STM8AL3L88TCY is designed for ultra-low-power operation, with Halt mode current of 0.35 µA. This extends battery life in portable and remote devices.

What is the difference between STM8AL3L88TCY and STM8AL3L88TAY?

The STM8AL3L88TCY uses an LQFP-48 package, while the STM8AL3L88TAY uses an LQFP-64 package. Both have the same core and memory, but the TAY variant offers more I/O pins.

Can STM8AL3L88TCY be used in industrial applications?

Yes, the STM8AL3L88TCY operates from -40°C to +85°C and has robust ESD protection, making it suitable for industrial sensors and controllers.

Where can I buy STM8AL3L88TCY online?

STM8AL3L88TCY is available from authorized distributors like DigiKey and Mouser. As of 2026-08-12, pricing starts at $3.25 for single-unit quantities.

What is the price of STM8AL3L88TCY?

As of 2026-08-12, the STM8AL3L88TCY is priced at $3.25 for 1 unit, $2.95 for 10 units, and $1.85 for 1000 units at major distributors.

What is the lead time for STM8AL3L88TCY?

Typical lead time for STM8AL3L88TCY is 8-12 weeks from STMicroelectronics, but stock may be available at distributors like DigiKey and Mouser for immediate shipment.

Is STM8AL3L88TCY in stock?

Stock availability varies by distributor. As of 2026-08-12, DigiKey and Mouser may have limited stock; check their websites for real-time inventory.

STM8AL3L88TCY vs STM8L151C8T6 - which is better for low-power applications?

The STM8AL3L88TCY is optimized for ultra-low-power with 0.35 µA Halt current, while the STM8L151C8T6 has a higher Halt current of 0.5 µA. For battery-powered designs, the STM8AL3L88TCY is better.

What is the best drop-in replacement for STM8AL3L88TCY?

The STM8AL3L88TAY is a drop-in replacement with the same core and memory but in an LQFP-64 package. For LQFP-48, the STM8AL3L88TCY is unique; consider STM8L151C8T6 with PCB modifications.

Can STM8L151C8T6 replace STM8AL3L88TCY?

The STM8L151C8T6 is not a direct drop-in replacement due to different package (LQFP-48 vs LQFP-48) and pinout differences. It requires PCB redesign and has higher power consumption.

Where can I download the STM8AL3L88TCY datasheet PDF?

The STM8AL3L88TCY datasheet is available at https://www.st.com/resource/en/datasheet/stm8al3l88.pdf. It contains full specifications, pinout, and application notes.

Where can I find the STM8AL3L88TCY pinout?

The STM8AL3L88TCY pinout is detailed in the datasheet at https://www.st.com/resource/en/datasheet/stm8al3l88.pdf, specifically in the pin description section.

What are the key specifications of STM8AL3L88TCY that engineers should know?

Key specs include 16 MHz STM8 core, 64 KB Flash, 4 KB RAM, 2 KB EEPROM, 1.8V-3.6V operation, 12-bit ADC with 25 channels, and 0.35 µA Halt current. These make it ideal for ultra-low-power embedded applications.

Hey Google, what can replace STM8AL3L88TCY?

The STM8AL3L88TAY is a same-brand replacement with identical core and memory but in an LQFP-64 package. For a drop-in LQFP-48 replacement, consider the STM8L151C8T6 with PCB modifications.

Is STM8AL3L88TCY the same as STM8L151C8T6?

No, they are different. The STM8AL3L88TCY is from the STM8AL series with ultra-low-power features, while the STM8L151C8T6 is from the STM8L series with standard low-power. They have different power consumption and peripheral sets.

What is the best STMicroelectronics equivalent for STM8AL3L88TCY?

The best STMicroelectronics equivalent is the STM8AL3L88TAY, which shares the same core, memory, and peripherals but in a larger LQFP-64 package. For LQFP-48, no exact equivalent exists.

Engineering reference data for STM8AL3L88TCY — comparison, design guidance, and compliance information.

Selection Guide

Choose the STM8AL3L88TCY when you need an ultra-low-power 8-bit MCU with 64KB Flash and a compact LQFP-48 package. It is ideal for battery-powered applications where power consumption is critical. If you need more I/O pins, consider the STM8AL3L88TAY (LQFP-64) but note the larger footprint. For cost-sensitive designs with lower memory requirements, the STM8L151C6T6 offers 32KB Flash but lacks EEPROM. The STM8L151C8T6 is a drop-in alternative with similar specs but higher power consumption. If you need an LCD driver, the STM8L152C8T6 is suitable but consumes more power. For most ultra-low-power applications, the STM8AL3L88TCY provides the best balance of power efficiency, memory, and package size.

Comparison with Alternatives

Parameter	This Product	STM8AL3L88TAY	STM8L151C8T6	STM8L151C6T6	STM8L152C8T6
Package	LQFP-48	LQFP-64	LQFP-48	LQFP-48	LQFP-48
Brand	STMicroelectronics	STMicroelectronics	STMicroelectronics	STMicroelectronics	STMicroelectronics
Flash Memory	64 KB	64 KB	64 KB	32 KB	64 KB
RAM	4 KB	4 KB	4 KB	2 KB	4 KB
Halt Mode Current	0.35 µA	0.35 µA	0.5 µA	0.5 µA	0.5 µA
ADC Resolution	12-bit	12-bit	12-bit	12-bit	12-bit
LCD Driver	No	No	No	No	Yes
Operating Voltage	1.8V - 3.6V	1.8V - 3.6V	1.8V - 3.6V	1.8V - 3.6V	1.8V - 3.6V

Key Differentiators

Ultra-low Halt mode current of 0.35 µA (vs STM8L151C8T6)
Integrated EEPROM of 2 KB (vs STM8L151C6T6)
LQFP-48 package with 25 ADC channels (vs STM8AL3L88TAY)

Design Notes

For ultra-low-power applications, use the Halt mode with an RTC wake-up. Ensure the power supply is stable and decoupled with 100nF and 10µF capacitors close to the VDD pins. The Halt mode current is 0.35 µA, but this can increase if the RTC is enabled. Optimize the clock configuration to use the low-speed internal oscillator (LSI) for RTC to minimize power consumption.

Place decoupling capacitors (100nF) as close as possible to each VDD pin, and a bulk capacitor (10µF) near the main power entry. For the LQFP-48 package, ensure proper grounding with a solid ground plane. Keep analog and digital grounds separate if using the ADC for precision measurements. Follow ST's layout guidelines in the datasheet for optimal EMC performance.

Avoid floating I/O pins by configuring them as outputs or enabling pull-ups. The NRST pin must be pulled high with a 100nF capacitor to ground for reliable reset. When using the ADC, ensure the reference voltage is stable and bypassed. Do not exceed the absolute maximum ratings for VDD (3.6V) to prevent damage. Use the watchdog timer to recover from software hangs in industrial environments.