My Inquiry
My Account
STMicroelectronics ST72F324LJ4T6
- Part No.:
- ST72F324LJ4T6
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 44-LQFP
- Datasheet:
-
ST72F324LJ4T6.pdf
- Description:
- IC MCU 8BIT 16KB FLASH 44LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:2,246
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
ST72F324LJ4T6 from STMicroelectronics is an 8-bit Flash-based microcontroller with 8 KB program memory, 384 bytes RAM (256-byte stack), 10-bit ADC (12-channel), four timers including 16-bit Timer A/B, SPI and SCI interfaces, and operation in 2.85–3.6 V supply range at –40°C to +85°C. It targets embedded control in industrial sensors, motor drive supervision, and low-power metering systems.
For engineers reviewing the ST72F324LJ4T6 datasheet, ST72F324LJ4T6 pinout, ST72F324LJ4T6 application, or ST72F324LJ4T6 equivalent, this MCU offers verified dual-voltage HD-Flash programming, nested interrupt handling with 10 vectors, configurable watchdog, and real-time clock/beeper functionality for time-critical firmware deployments.
Technical Context
The ST72F324LJ4T6 implements the ST7 CPU core with 63 basic instructions and 17 addressing modes, supporting in-application programming (IAP) and in-circuit programming (ICP) via ICC interface. Its clock system integrates internal RC oscillator, external crystal/ceramic resonator support, and a PLL for 2× frequency multiplication.
Power management includes four low-power modes-Halt, Active-Halt, Wait, and Slow-with peripheral wake-up capability. The nested interrupt controller supports 9/6 external interrupt lines mapped across 4 vectors, enabling responsive event-driven firmware in resource-constrained environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | ST7 8-bit CPU with 63 instructions and 17 addressing modes; enables compact, deterministic firmware for cost-sensitive control tasks. |
| Program Memory | 8 KB Flash/ROM with read-out protection; supports IAP/ICP for field updates and production programming without external programmers. |
| RAM & Stack | 384 bytes RAM including 256-byte hardware stack; sufficient for real-time sensor fusion and small state machines. |
| Analog Input | 10-bit ADC with up to 12 input channels; delivers ±2 LSB INL/DNL accuracy for precision voltage/current monitoring. |
| Timers | Four timers: Main Clock Controller (RTC/beep/clock-out), configurable watchdog, 16-bit Timer A (input capture/output compare/PWM), and 16-bit Timer B (dual input capture/dual output compare/PWM). |
| Communication | SPI synchronous interface (master/slave) and SCI asynchronous UART (full-duplex, programmable baud rate); enables sensor interfacing and host communication with minimal pin count. |
| Supply Range | 2.85 V to 3.6 V operation; compatible with single-cell Li-ion or regulated 3.3 V rails in portable and industrial equipment. |
Pinout & Package
LQFP44 (10 × 10 mm, 0.8 mm pitch) package with 32 multifunctional bidirectional I/O lines, 22 alternate function lines, and 12 high-sink outputs (20 mA). Pin functions include dedicated RESET, ICCSEL/VPP, OSCIN/OSCOUT, SPI/SCI/Timers/ADC I/O, and power/ground distribution optimized for noise immunity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VSS | Power supply and ground | Dedicated analog/digital supply pins with separate decoupling requirements; critical for ADC accuracy and EMI robustness. |
| OSCIN / OSCOUT | Crystal/resonator interface | Supports 1–8 MHz external crystals or ceramic resonators; enables precise timing for serial comms and RTC. |
| RESET | Asynchronous reset input | Active-low, Schmitt-triggered input with internal pull-up; ensures reliable cold-start and brown-out recovery. |
| ICCSEL/VPP | In-circuit programming control | Selects ICC programming mode and provides VPP voltage during Flash programming; requires external 12 V for ICP. |
| PA0–PA7, PB0–PB7, PC0–PC7, PD0–PD7 | General-purpose I/O ports | Configurable as digital input/output, open-drain, high-sink (20 mA), or alternate-function peripherals (SPI/SCI/ADC/timer signals). |
Key Features
| Feature | Design Value |
|---|---|
| HD-Flash endurance | 100 write/erase cycles with 40-year data retention at 85°C-enables long-life field firmware updates in unattended equipment. |
| Nested interrupt controller | 10 interrupt vectors plus TRAP/RESET; allows prioritized, low-latency response to multiple concurrent events without polling overhead. |
| Main Clock Controller | Integrated real-time base, beep generator, and clock-out signal; eliminates need for external timing ICs in alarm or status-indication applications. |
| Low-power modes | Halt (0.5 µA), Active-Halt (1.5 µA), Wait (10 µA), Slow (50 µA); extends battery life in intermittent-sensing applications like smart meters. |
| I/O flexibility | 32 bidirectional I/O lines with 22 alternate functions and 12 high-sink outputs; simplifies PCB layout by consolidating control, sensing, and actuation on one device. |
Applications
| Industrial Sensor Node | Motor Drive Supervision |
|---|---|
Use Scenario: Standalone temperature/humidity/pressure node with local display and wireless telemetry. IC Role / Device Role / Timing Role: Central controller managing ADC sampling, SPI communication with environmental sensors, SCI UART to RF module, and real-time timestamping via MCC/RTC. Use Value: Integrated 10-bit ADC, dual serial interfaces, and low-power modes eliminate external signal conditioning and reduce sleep current to sub-µA levels. | Use Scenario: BLDC motor controller auxiliary board monitoring overcurrent, thermal faults, and commutation timing. IC Role / Device Role / Timing Role: Fault-monitoring co-processor capturing analog fault signals via ADC, generating PWM fault pulses using Timer B, and signaling host MCU via SCI. Use Value: High-sink I/O drives LEDs/relays directly; nested interrupts ensure <1 µs response to overcurrent events. |
| Smart Energy Meter | Portable Medical Device |
Use Scenario: Battery-powered electricity meter with tamper detection, pulse counting, and LCD driver interface. IC Role / Device Role / Timing Role: System supervisor handling metrology pulse capture (Timer A input capture), LCD segment driving (high-sink I/O), and real-time billing timestamp (MCC/RTC). Use Value: 8 KB Flash stores tariff logic and calibration tables; Slow mode draws only 50 µA during display refresh intervals. | Use Scenario: Handheld blood glucose monitor with strip interface, LED backlight, and USB-to-SCI bridge. IC Role / Device Role / Timing Role: Primary controller executing strip electrochemical measurement (ADC), driving backlight PWM (Timer A), and managing USB bridge protocol via SCI. Use Value: Single 3.3 V supply simplifies power design; 384-byte RAM accommodates glucose algorithm buffers and UI state. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 8-bit microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ST72F324LK4T6 | LQFP32 (7 × 7 mm) package; 24 I/O lines vs. 32 on J4T6; same 8 KB Flash, 384-byte RAM, and peripheral set. | Preferred where board space is constrained and fewer I/Os are needed-e.g., simple sensor transmitters with fixed pinout. | Select when footprint reduction outweighs I/O count; verify mechanical compatibility and signal routing feasibility. |
| STM8S003F3P6 | STM8 core (enhanced Harvard architecture), 8 KB Flash, 1 KB RAM, 10-bit ADC (10 ch), no built-in RTC/beeper; LQFP32 package. | Better suited for higher-performance control loops requiring larger RAM buffer or faster interrupt latency; lacks integrated beep/RTC. | Choose for new designs needing longer lifecycle support and broader toolchain; avoid if legacy ST7 firmware porting or beep/RTC is mandatory. |
Compared with ST72F324LK4T6, the J4T6 offers 8 additional I/Os and LQFP44 packaging for complex peripheral routing; versus STM8S003F3P6, it trades RAM and modern tooling for proven RTC/beeper integration and ST7 ecosystem continuity.
Availability
ST72F324LJ4T6 is available at Aetrix Electronics and suitable for industrial sensor nodes, motor drive supervision systems, and smart energy meters requiring stable component supply and long-term obsolescence management.
Supply support for ST72F324LJ4T6 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 microcontrollers, power management, analog, and MEMS solutions for automotive, industrial, and consumer markets.
The ST7 family was designed for cost-effective, low-power 8-bit embedded control in resource-constrained applications-emphasizing Flash flexibility, interrupt responsiveness, and mixed-signal integration without external support components.
FAQ
What programming interfaces does the ST72F324LJ4T6 support?
The ST72F324LJ4T6 supports In-Circuit Programming (ICP) via the ICC interface using a 12 V VPP signal on the ICCSEL pin, and In-Application Programming (IAP) through firmware-controlled Flash writes. Both methods use the same 4-wire ICC protocol and require no external debug probe-only a simple level-shifter for VPP generation during ICP.
Does the ST72F324LJ4T6 include hardware RTC functionality?
Yes-the Main Clock Controller (MCC) includes a real-time clock (RTC) timer with calendar-capable prescaler, independent of CPU clock domain. It operates in all low-power modes except Halt, maintains time across resets, and generates periodic interrupts for scheduling without consuming CPU cycles.
Can the ST72F324LJ4T6 drive LEDs or relays directly?
Yes-12 I/O pins support high-sink operation up to 20 mA per pin (with total package limit of 100 mA), enabling direct drive of standard LEDs, small relays, or buzzer elements without external drivers. This reduces BOM count and PCB area in compact control modules.
What is the maximum ADC sampling rate supported?
The 10-bit ADC achieves up to 1 MSPS conversion rate with internal RC clock source, or 500 kSPS when synchronized to main system clock. Conversion time is 12 µs minimum, and the ADC supports automatic channel scanning, trigger-on-timer, and end-of-conversion interrupt-ideal for multi-sensor polling.
ST72F324LJ4T6 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- 44-LQFP
- Series:
- ST7
- Packaging:
- Tray
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Core Processor:
- ST7
- Core Size:
- 8-Bit
- Speed:
- 8MHz
- Connectivity:
- SCI, SPI
- Peripherals:
- POR, PWM, WDT
- Number of I/O:
- 32
- Program Memory Size:
- 16KB (16K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- -
- RAM Size:
- 512 x 8
- Voltage - Supply (Vcc/Vdd):
- 2.85V ~ 3.6V
- Data Converters:
- A/D 12x10b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
ST72F324LJ4T6 FAQ
1.How can I place an order for ST72F324LJ4T6 through Aetrix?
Please submit a Request for Quotation (RFQ) for ST72F324LJ4T6 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 ST72F324LJ4T6 reliable?
The price and inventory of ST72F324LJ4T6 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ST72F324LJ4T6 is usually 5 days.
3.What payment methods are accepted for ST72F324LJ4T6?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ST72F324LJ4T6 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ST72F324LJ4T6?
ST72F324LJ4T6 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ST72F324LJ4T6 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 ST72F324LJ4T6?
For technical support, including ST72F324LJ4T6 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ST72F324LJ4T6 requirements.
6.How does Aetrix verify that ST72F324LJ4T6 is sourced from the original manufacturer or authorized distributors?
All ST72F324LJ4T6 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 ST72F324LJ4T6 meets industry standards.
7.What is the process for return or replacement of ST72F324LJ4T6?
All ST72F324LJ4T6 units undergo pre-shipment inspection (PSI). If there is an issue with ST72F324LJ4T6, 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 ST72F324LJ4T6 part is unused and in its original packaging.
Return procedure for ST72F324LJ4T6:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ST72F324LJ4T6 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
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 …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
