My Inquiry
My Account
STMicroelectronics ST72F324K4T6TR
- Part No.:
- ST72F324K4T6TR
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 32-LQFP
- Datasheet:
-
ST72F324K4T6TR.pdf
- Description:
- IC MCU 8BIT 16KB FLASH 32LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:2,944
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
ST72F324K4T6TR from STMicroelectronics is an 8-bit microcontroller featuring 8 KB Flash memory, 384 bytes RAM, 10-bit ADC with up to 12 input channels, dual 16-bit timers (Timer A and Timer B), SPI and SCI serial interfaces, and four power-saving modes. It operates across 3.8 V to 5.5 V and supports industrial temperature range (−40°C to +125°C), targeting embedded control in motor drives, appliance panels, and industrial sensors.
For engineers reviewing the ST72F324K4T6TR datasheet, ST72F324K4T6TR pinout, ST72F324K4T6TR application, or ST72F324K4T6TR equivalent, this MCU delivers deterministic real-time control with programmable LVD/AVD supervision, PLL-based clock multiplication, and in-application programming capability for field firmware updates.
Technical Context
This MCU implements a Harvard architecture with 63 basic instructions and 17 addressing modes, including 8×8 unsigned multiply. Its nested interrupt controller supports 10 vectors plus TRAP and RESET, with up to 9 external interrupt lines mapped across 4 vectors.
The on-chip peripherals include a Main Clock Controller (MCC) with real-time base, beep generator, and clock-out; a configurable watchdog timer; and low-current-coupled analog subsystem enabling robust ADC sampling in noisy environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | 8-bit ST7 CPU with 63 instructions and 17 addressing modes - enables compact code footprint and predictable interrupt latency. |
| Flash Memory | 8 KB HD-Flash with read-out protection - supports secure firmware storage and in-application reprogramming. |
| RAM | 384 bytes (256-byte stack) - sufficient for real-time task stacks and small data buffers in sensor/control loops. |
| ADC Resolution | 10-bit SAR ADC with up to 12 inputs - provides 1 LSB = ~4.9 mV @ 5 V reference for precision analog sensing. |
| Timers | Two 16-bit timers: Timer A (1 capture/1 compare/PWM) and Timer B (2 capture/2 compare/PWM) - enables dual-channel motor phase control or encoder counting. |
| Serial Interfaces | SPI (master/slave) and SCI (asynchronous UART) - supports daisy-chain sensor networks and host MCU communication. |
| Supply Range | 3.8 V to 5.5 V - compatible with standard 5 V logic systems and tolerant of rail droop in industrial power supplies. |
| Temperature Range | −40°C to +125°C - qualified for under-hood automotive modules and factory-floor controllers. |
Pinout & Package
TQFP32 (7 × 7 mm, 0.8 mm pitch) package with 32-pin layout optimized for compact industrial PCBs and thermal reliability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Main power supply | Connects to 3.8–5.5 V rail; decoupling capacitor required within 10 mm for stable core operation. |
| VSS | GND reference | Digital ground plane connection; separate analog ground not required due to low-current ADC coupling. |
| PA0–PA7 | Port A I/O | Bidirectional with alternate functions: PA0–PA3 support external interrupts; PA4–PA7 map to SPI/SCI signals. |
| PD0–PD7 | Port D I/O | Includes high-sink outputs (20 mA) on PD0–PD3 - suitable for direct LED or relay driver interface without external transistors. |
| OSCIN/OSCOUT | Crystal oscillator interface | Supports 1–8 MHz ceramic resonator or quartz crystal; internal RC oscillator (1 MHz typ.) available as backup clock source. |
| RESET | Asynchronous reset input | Active-low, Schmitt-triggered; internal LVD generates reset if VDD drops below programmable threshold (e.g., 4.0 V). |
| ICCSEL/VPP | In-circuit programming enable | Pulled high during normal operation; driven low to enter ICC programming mode with external 12.5 V VPP pulse. |
Key Features
| Feature | Design Value |
|---|---|
| Programmable Low Voltage Detector (LVD) | Configurable reset thresholds (e.g., 4.0 V, 4.3 V) with interrupt capability - enables graceful shutdown before brownout corruption. |
| In-Application Programming (IAP) | Allows firmware update via SCI or SPI without external programmer - critical for remote field maintenance. |
| Four Power-Saving Modes | Halt (0.5 µA), Active-Halt (1.2 µA), Wait (12 µA), Slow (50 µA) - extends battery life in portable diagnostic tools. |
| Enhanced Watchdog Timer | Configurable timeout (1 ms to 2 s) with hardware option (WDGHALT) to continue timing during Halt mode - prevents lockup in sleep-wake cycles. |
| Real-Time Base & Beeper Generator | MCC module provides 1 Hz to 32 kHz clock outputs and tone generation using internal RC or crystal source - eliminates external timing components for UI feedback. |
Applications
| Motor Control Interface | Industrial Sensor Node |
|---|---|
Use Scenario: Brushless DC motor commutation in HVAC blowers using Hall-effect feedback. IC Role / Device Role / Timing Role: Real-time PWM generation and ADC-sampled current sensing with synchronized timer capture. Use Value: Dual 16-bit timers enable precise 120° phase alignment; 10-bit ADC resolves torque ripple at ≤0.5% full scale. |
Use Scenario: Multi-sensor environmental monitor (temperature, humidity, CO₂) in factory automation. IC Role / Device Role / Timing Role: Central data aggregator with SPI-connected sensors and SCI telemetry to PLC. Use Value: Low-power Wait mode reduces average current to 12 µA between 100-ms sampling intervals. |
| Appliance User Interface | Power Supply Supervisor |
Use Scenario: Keypad scanning and LED backlight dimming in washing machine control panel. IC Role / Device Role / Timing Role: GPIO-managed matrix scan + PWM-driven LED brightness control via Timer A. Use Value: High-sink outputs (20 mA) drive LEDs directly; programmable LVD triggers safe shutdown during AC line sag. |
Use Scenario: Monitoring 5 V and 3.3 V rails in telecom power shelf with fault logging. IC Role / Device Role / Timing Role: Dual-voltage supervision using LVD (5 V rail) and AVD (3.3 V rail) with interrupt-driven event capture. Use Value: Independent AVD threshold (e.g., 3.0 V) detects 3.3 V rail collapse before system reset occurs. |
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 | Same ST7 core, but with enhanced ESD rating (4 kV HBM) and updated Flash endurance (1,000 cycles vs. 100 cycles). | Preferred for new designs requiring higher reliability in electrostatic-prone assembly environments. | Select when long-term field reprogramming frequency exceeds 100 cycles or ESD immunity >2 kV is mandated. |
| STM8S003F3P6 | Successor 8-bit core (STM8), 8 KB Flash, 1 KB RAM, 10-bit ADC, but no built-in beeper or MCC real-time base. | Lacks integrated tone generation and dedicated real-time clock prescaler - requires external components for UI audio. | Choose for cost-sensitive volume production where legacy ST7 toolchain compatibility is not required. |
Compared with ST72F324K4T6TR, ST72F324B4T6 offers superior Flash rewrite endurance and ESD robustness for demanding industrial deployments, while STM8S003F3P6 trades legacy peripheral integration for lower unit cost and broader modern toolchain support.
Availability
ST72F324K4T6TR is available at Aetrix Electronics and suitable for motor control interfaces, industrial sensor nodes, appliance user interfaces, and power supply supervisors requiring stable component supply across extended product lifecycles.
Supply support for ST72F324K4T6TR 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, designing and manufacturing microcontrollers, power devices, sensors, and analog ICs for industrial, automotive, and consumer markets.
The ST7 family was engineered for cost-effective, deterministic real-time control in resource-constrained embedded systems - emphasizing low-voltage operation, mixed-signal integration, and field-programmability without external debug hardware.
FAQ
Is ST72F324K4T6TR still recommended for new designs?
No - STMicroelectronics explicitly marks this device as "NOT FOR NEW DESIGN" per the April 2008 datasheet. The ST72F324Bx series (e.g., ST72F324B4T6) is the designated replacement, offering improved Flash endurance, ESD performance, and extended lifecycle support. Legacy design refreshes should migrate to the B-series or evaluate the STM8S platform.
What programming interfaces does ST72F324K4T6TR support?
It supports In-Circuit Programming (ICC) via the ICCSEL/VPP pin using a 12.5 V pulse and standard ST-LINK-compatible programmers, plus In-Application Programming (IAP) over SCI or SPI using user-implemented bootloader code. No JTAG interface is present; debugging relies on single-wire SCI trace or ROM-based monitor.
Can the 10-bit ADC operate during low-power modes?
Yes - the ADC can perform conversions in Wait and Slow modes, but not in Halt or Active-Halt. In Wait mode, the CPU halts while peripherals (including ADC) remain active; conversion time increases by ~15% due to reduced clock speed, maintaining full 10-bit resolution without added noise.
Does ST72F324K4T6TR include hardware CRC or encryption acceleration?
No - the ST72F324K4T6TR lacks dedicated cryptographic hardware. It provides no hardware CRC generator, AES engine, or secure key storage. Firmware-level checksums must be implemented in software; secure boot requires external authentication ICs or external flash with protected sectors.
ST72F324K4T6TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- 32-LQFP
- Series:
- ST7
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Programmable:
- Verified
- Core Processor:
- ST7
- Core Size:
- 8-Bit
- Speed:
- 8MHz
- Connectivity:
- SCI, SPI
- Peripherals:
- LVD, POR, PWM, WDT
- Number of I/O:
- 24
- Program Memory Size:
- 16KB (16K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- -
- RAM Size:
- 512 x 8
- Voltage - Supply (Vcc/Vdd):
- 3.8V ~ 5.5V
- Data Converters:
- A/D 8x10b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
ST72F324K4T6TR FAQ
1.How can I place an order for ST72F324K4T6TR through Aetrix?
Please submit a Request for Quotation (RFQ) for ST72F324K4T6TR 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 ST72F324K4T6TR reliable?
The price and inventory of ST72F324K4T6TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ST72F324K4T6TR is usually 5 days.
3.What payment methods are accepted for ST72F324K4T6TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ST72F324K4T6TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ST72F324K4T6TR?
ST72F324K4T6TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ST72F324K4T6TR 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 ST72F324K4T6TR?
For technical support, including ST72F324K4T6TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ST72F324K4T6TR requirements.
6.How does Aetrix verify that ST72F324K4T6TR is sourced from the original manufacturer or authorized distributors?
All ST72F324K4T6TR 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 ST72F324K4T6TR meets industry standards.
7.What is the process for return or replacement of ST72F324K4T6TR?
All ST72F324K4T6TR units undergo pre-shipment inspection (PSI). If there is an issue with ST72F324K4T6TR, 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 ST72F324K4T6TR part is unused and in its original packaging.
Return procedure for ST72F324K4T6TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ST72F324K4T6TR Tags
-
ATTINY4-TSHR
Microchip Technology
-
ATTINY10-TSHR
Microchip Technology
-
ATTINY10-TS8R
Microchip Technology
-
ATTINY202-SSNR
Microchip Technology
-
ATTINY202-SSFR
Microchip Technology
-
ATTINY402-SSNR
Microchip Technology
-
PIC16F15213T-I/MF
Microchip Technology
-
PIC16F15213-E/MF
Microchip Technology
-
PIC10F200T-I/OT
Microchip Technology
-
ATTINY412-SSNR
Microchip Technology
-
PIC10F202T-I/OT
Microchip Technology
-
ATTINY404-SSNR
Microchip Technology
Tech Hub
Comparator circuit design covering voltage thresholds, input limits, open-collector outputs, LM393 wiring, op-amp differences, hysteresis, timing, window detection and practical fault diagnosis.
Schmitt triggers use separate rising and falling thresholds to stabilize slow or noisy signals. This guide covers hysteresis, 74HC14 and 74HCT14 selection, comparator calculations, RC oscillators and p…
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
