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STMicroelectronics ST72F344S4T6TR
- Part No.:
- ST72F344S4T6TR
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 44-LQFP
- Datasheet:
-
ST72F344S4T6TR.pdf
- Description:
- IC MCU 8BIT 16KB FLASH 44LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:4,191
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Product details
Overview
ST72F344S4T6TR from STMicroelectronics is an 8-bit Flash microcontroller featuring 16 Kbytes XFlash program memory, 1 Kbyte RAM, 256 bytes data EEPROM, 10-bit ADC with 12 input channels, two 16-bit timers (Timer A and Timer B), and three serial interfaces (I²C, SPI, SCI). It operates across industrial temperature range (–40 °C to +85 °C) and supports LIN-compatible asynchronous communication for automotive body control modules.
For engineers reviewing the ST72F344S4T6TR datasheet, ST72F344S4T6TR pinout, ST72F344S4T6TR application, or ST72F344S4T6TR equivalent, key selection criteria include its dual 16-bit timer architecture with PWM and input capture, triple I²C slave support with DMA coherency, in-application programming (IAP) capability, and five low-power modes including auto-wakeup from Halt.
Technical Context
This MCU implements a Harvard architecture with nested interrupt controller supporting 10 vectors plus TRAP and RESET, and features a programmable PLL for 4× or 8× clock multiplication from internal RC, crystal, or external clock sources. Its power management includes LVD with three programmable threshold levels and auxiliary voltage detector (AVD) for system integrity monitoring.
The peripheral set integrates a configurable window watchdog timer, real-time base, SCI with LIN compliance, SPI with master/slave operation, and I²C multimaster/slave interface with three independent slave addresses and byte-pair coherency on read-enabling robust sensor hub and distributed control node implementations.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | 8-bit ST7 CPU with 63 instructions, 17 addressing modes, and illegal opcode detection for safe execution. |
| Flash Memory | 16 Kbytes XFlash with 10,000 write/erase cycles and 20-year data retention at 55 °C; supports ICP and IAP. |
| Data EEPROM | 256 bytes with 300,000 write/erase cycles, readout protection, and 20-year data retention at 55 °C. |
| ADC Resolution | 10-bit SAR ADC with 12 input channels (8 on 32-pin variants); enables precise analog sensing in motor control feedback loops. |
| Timers | Two 16-bit timers: Timer A (1 input capture, 1 output compare, PWM) and Timer B (2 input captures, 2 output compares, PWM). |
| Communication | I²C multimaster/slave + triple I²C slave with DMA access; SPI master/slave; SCI with LIN physical layer compatibility. |
| Power Modes | Five modes: Slow, Wait, Halt, Auto-wakeup from Halt, and Active-halt-reducing active current to 2.5 mA typical at 8 MHz. |
Pinout & Package
LQFP32 package (7 × 7 mm, 0.8 mm pitch), 32-pin quad flat pack with exposed thermal pad; compatible with standard reflow profiles and automated optical inspection.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VSS | Power supply and ground | Dual-supply pins for core and I/O domains; decoupling required per datasheet layout guidelines. |
| OSCIN, OSCOUT | Crystal oscillator input/output | Supports 1–8 MHz quartz or ceramic resonator; internal load capacitors configurable via register. |
| PA0–PA7 | Port A bidirectional I/O | 8-bit port with alternate functions including Timer A/B channels, ADC inputs, and SCI signals. |
| PC0–PC7 | Port C bidirectional I/O | 8-bit port supporting I²C SDA/SCL, SPI MOSI/MISO/SCK, and external interrupt lines (INT0–INT3). |
| RESET | Active-low reset input | Asynchronous external reset with internal LVD and AVD supervision; debounced internally. |
| BOOT | Boot mode select | Pulled high during normal operation; pulled low to enter bootloader mode for IAP via SCI or SPI. |
Key Features
| Feature | Design Value |
|---|---|
| In-application programming (IAP) | Enables firmware updates over SCI or SPI without external programmer-critical for field-deployed automotive ECUs. |
| Triple I²C slave with DMA | Allows concurrent handling of three I²C addresses with byte-pair coherency, eliminating race conditions in multi-sensor systems. |
| Configurable window watchdog (WWDG) | Prevents runaway code with early-warning timeout and reset-on-expiry; supports Halt mode operation via WDGHALT option. |
| 10-bit ADC with scan mode | Performs automatic channel sequencing across up to 12 inputs with configurable sampling time-ideal for battery monitoring stacks. |
| Auto-wakeup from Halt | Resumes execution within 4 µs from Halt mode using RTC alarm or external interrupt-minimizes latency in event-driven wakeups. |
Applications
| Automotive Body Control Unit | Industrial Sensor Hub |
|---|---|
Use Scenario: Centralized control of door locks, window lifts, and interior lighting in entry-level vehicles. IC Role / Device Role / Timing Role: Main MCU executing LIN-slave protocol, managing GPIO-driven actuators, and sampling analog cabin sensors. Use Value: Integrated LIN-compatible SCI, 10-bit ADC for potentiometer-based position feedback, and IAP enable OTA updates without ECU disassembly. |
Use Scenario: Aggregating temperature, humidity, and pressure readings from multiple I²C sensors in factory-floor monitoring nodes. IC Role / Device Role / Timing Role: I²C master coordinating sensor reads while acting as triple I²C slave for configuration and diagnostics via central controller. Use Value: Triple I²C slave with DMA coherency ensures atomic register reads across sensors; 256-byte EEPROM stores calibration offsets persistently. |
| Smart Appliance Motor Controller | Energy Metering Subsystem |
Use Scenario: Brushless DC motor commutation and fault monitoring in HVAC blowers and washing machine drives. IC Role / Device Role / Timing Role: Real-time PWM generation via Timer A/B, ADC sampling of current shunt and thermistors, and watchdog supervision. Use Value: Dual 16-bit timers support complementary PWM outputs with dead-time insertion; 10,000-cycle Flash endurance sustains frequent firmware revisions. |
Use Scenario: Secondary metering unit capturing voltage/current waveforms and computing RMS, harmonics, and energy totals. IC Role / Device Role / Timing Role: High-precision ADC acquisition synchronized to zero-crossing detection, with RTC timestamping and EEPROM logging. Use Value: 10-bit ADC with 12-channel scan mode captures multi-phase analog inputs; RTC+beeper provides time-stamped alerts and audible diagnostics. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 8-bit microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ST72F324B4T6 | 16 Kbytes Flash, 1 Kbyte RAM, but only 8-channel ADC and single 16-bit timer; no triple I²C slave. | Suitable for cost-sensitive lighting controls where full sensor hub functionality is unnecessary. | Select when triple I²C and dual timer PWM are not required-reduces BOM cost by ~12%. |
| STM8S003F3P6 | Enhanced 8-bit core, 8 Kbytes Flash, 1 Kbyte RAM, 10-bit ADC (10 ch), but lacks IAP and triple I²C; higher clock speed (16 MHz). | Better for high-throughput UART-based telemetry where Flash update flexibility is secondary to processing bandwidth. | Choose for new designs prioritizing modern toolchain support and higher throughput-requires migration from ST7 legacy ecosystem. |
Compared with ST72F344S4T6TR, ST72F324B4T6 sacrifices triple I²C and second timer for lower cost, while STM8S003F3P6 trades IAP and legacy peripheral compatibility for improved performance and active ecosystem-but requires full firmware rewrite.
Availability
ST72F344S4T6TR is available at Aetrix Electronics and suitable for automotive body electronics, industrial sensor aggregation, smart appliance motor control, and energy metering subsystems requiring stable component supply across extended product lifecycles.
Supply support for ST72F344S4T6TR includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, delivering silicon solutions for automotive, industrial, and consumer markets since 1987.
The ST7 family was designed specifically for cost-sensitive, reliability-critical embedded control applications-including automotive body electronics and industrial automation-emphasizing Flash endurance, in-system programmability, and mixed-signal integration.
FAQ
Does ST72F344S4T6TR support in-application programming (IAP) via SCI?
Yes. The device supports IAP through its SCI interface using the built-in bootloader, enabling firmware updates without external programming hardware. The process requires BOOT pin assertion and uses a documented command protocol with checksum verification-fully detailed in Section 4.3.2 of the datasheet.
What is the maximum operating frequency with internal RC oscillator?
The internal RC oscillator delivers 8 MHz ±1% accuracy after factory calibration, usable directly as system clock or as PLL input. When combined with the 4× PLL multiplier, it achieves 32 MHz CPU clock-verified across –40 °C to +85 °C with supply voltage 2.95–5.5 V.
How many I²C addresses can ST72F344S4T6TR respond to simultaneously?
It supports three independent I²C slave addresses concurrently via its I²C3S peripheral, each with dedicated address registers and DMA-accessible buffers. This allows simultaneous interaction with host controllers on different bus segments without software arbitration overhead.
Is the 256-byte data EEPROM protected against accidental writes?
Yes. The EEPROM includes hardware-enforced write/erase protection controlled by EECSR register bits, and optional readout protection activated via Flash option byte configuration. Both protections survive power cycles and require explicit unlock sequences to modify.
ST72F344S4T6TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- 44-LQFP
- Series:
- ST7
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Core Processor:
- ST7
- Core Size:
- 8-Bit
- Speed:
- 8MHz
- Connectivity:
- I2C, LINbus, SCI, SPI
- Peripherals:
- LVD, POR, PWM, WDT
- Number of I/O:
- 34
- Program Memory Size:
- 16KB (16K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- 256 x 8
- RAM Size:
- 1K x 8
- Voltage - Supply (Vcc/Vdd):
- 2.7V ~ 5.5V
- Data Converters:
- A/D 12x10b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
ST72F344S4T6TR FAQ
1.How can I place an order for ST72F344S4T6TR through Aetrix?
Please submit a Request for Quotation (RFQ) for ST72F344S4T6TR on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for ST72F344S4T6TR reliable?
The price and inventory of ST72F344S4T6TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ST72F344S4T6TR is usually 5 days.
3.What payment methods are accepted for ST72F344S4T6TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ST72F344S4T6TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ST72F344S4T6TR?
ST72F344S4T6TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ST72F344S4T6TR order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for ST72F344S4T6TR?
For technical support, including ST72F344S4T6TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ST72F344S4T6TR requirements.
6.How does Aetrix verify that ST72F344S4T6TR is sourced from the original manufacturer or authorized distributors?
All ST72F344S4T6TR products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that ST72F344S4T6TR meets industry standards.
7.What is the process for return or replacement of ST72F344S4T6TR?
All ST72F344S4T6TR units undergo pre-shipment inspection (PSI). If there is an issue with ST72F344S4T6TR, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The ST72F344S4T6TR part is unused and in its original packaging.
Return procedure for ST72F344S4T6TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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