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STMicroelectronics ST72F63BK6M1
- Part No.:
- ST72F63BK6M1
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 34-BSOP (0.295", 7.50mm Width)
- Datasheet:
-
ST72F63BK6M1.pdf
- Description:
- IC MCU 8BIT 32KB FLASH 34SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,716
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Product details
Overview
ST72F63BK6M1 from STMicroelectronics is an 8-bit low-speed USB microcontroller featuring 32 KB HDFlash program memory, 1024 bytes RAM, integrated USB 1.5 Mbps transceiver with DFU support, 8-bit ADC (12-channel), and dual timers including a 16-bit timer with PWM and capture/compare. It operates at up to 24 MHz and targets embedded USB peripheral control in industrial sensors and HID devices.
For engineers reviewing the ST72F63BK6M1 datasheet, ST72F63BK6M1 pinout, ST72F63BK6M1 application, or ST72F63BK6M1 equivalent, key selection considerations include USB 1.1 compliance, on-chip 3.3 V regulator, RAM retention in Halt mode, and high-sink I/O capability (25 mA true open-drain) for direct LED/relay drive.
Technical Context
This MCU implements the ST7 core with 63 basic instructions and 17 addressing modes, supporting In-Application Programming (IAP) and In-Circuit Programming (ICP). Its USB interface integrates DMA, suspend/resume, and three programmable endpoints compliant with USB HID v1.0 and DFU class v1.1.
The clock system supports 12 MHz or 24 MHz external crystal oscillator, with Run, Wait, Slow, and Halt power modes. The 16-bit timer provides two input capture, two output compare, PWM generation, and clock input - all configurable without CPU intervention.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | ST7 8-bit CISC CPU with 63 instructions and 17 addressing modes; enables compact firmware and deterministic timing for real-time control. |
| Program Memory | 32 KB HDFlash with readout/write protection; supports field firmware updates via USB DFU or serial ICP. |
| RAM | 1024 bytes + 128-byte hardware stack; sufficient for USB descriptor handling, HID report buffering, and sensor data aggregation. |
| USB Interface | Low-speed (1.5 Mbps) USB 2.0-compliant with integrated 3.3 V regulator and transceivers; eliminates need for external PHY or LDO. |
| ADC | 8-bit successive-approximation ADC with 12 input channels; suitable for analog sensor interfacing (e.g., temperature, voltage monitoring) without external signal conditioning. |
| I/O Capability | Up to 27 GPIOs, including 2 true open-drain outputs rated 25 mA @ 1.5 V; drives LEDs, small relays, or logic-level MOSFETs directly. |
| Timers | One 16-bit timer with 2 capture/2 compare channels + PWM output, plus independent watchdog timer; enables motor control, pulse measurement, and system safety monitoring. |
Pinout & Package
ST72F63BK6M1 is housed in a QFN40 (6 × 6 mm, 0.5 mm pitch) package with exposed thermal pad. Pin functions are defined per Table 3 of Doc ID 7516 Rev 8, covering dedicated USB D+/D−, OSCIN/OSCOUT, RESET, VDD/VSS, VDDA/VSSA, and multiplexed I/O ports A–D.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| PA0–PA7 | Port A bidirectional I/O | Configurable as general-purpose I/O or alternate functions (e.g., ADC inputs, SCI TX/RX); PA2 supports OCMP1 output when enabled. |
| PB0–PB7 | Port B bidirectional I/O | Includes USB D+ (PB0) and D− (PB1); also supports SCI, I²C, and timer capture/compare signals. |
| PC0–PC7 | Port C bidirectional I/O | Supports ADC channel inputs (PC0–PC7), timer clock input (PC3), and interrupt-capable lines (PC4–PC7). |
| PD0–PD7 | Port D bidirectional I/O | Provides additional GPIOs; PD0–PD3 support SCI functionality, PD4–PD7 support I²C SCL/SDA and timer outputs. |
| OSCIN / OSCOUT | Crystal oscillator interface | Accepts 12 or 24 MHz parallel-resonant crystal; internal oscillator circuit eliminates external capacitors in basic configurations. |
| RESET | Bidirectional reset pin | Active-low input for external reset; outputs reset pulse during watchdog or LVD-triggered reset events. |
| VDD / VSS | Main power supply | Operates from 2.7–5.5 V; supports wide-input industrial and battery-powered applications. |
| VDDA / VSSA | Analog power domain | Separate analog supply pins reduce digital noise coupling into ADC measurements; require local decoupling. |
Key Features
| Feature | Design Value |
|---|---|
| In-Application Programming (IAP) | Enables firmware updates over USB or SCI without halting application execution - critical for remote device maintenance. |
| USB DFU Class Support | Firmware upgrade path compliant with USB Device Firmware Upgrade Specification v1.1; no host driver required beyond standard USB HID/DFU class support. |
| True Open-Drain I/Os | Two dedicated 25 mA sink outputs (PB6/PB7) tolerate 5.5 V on pin while driven low; simplify level-shifting and direct connection to higher-voltage peripherals. |
| RAM Retention Mode | Maintains full 1024-byte RAM content during Halt mode with current draw < 2 µA; preserves context across wake-up events without software restore overhead. |
| Integrated USB Voltage Regulator | On-chip 3.3 V regulator powered from VDD accepts 2.7–5.5 V input; removes need for external LDO and reduces BOM count and PCB area. |
Applications
| Industrial Sensor Node | USB Human Interface Device (HID) |
|---|---|
Use Scenario: Compact environmental monitor collecting temperature, humidity, and analog voltage readings in factory-floor enclosures. IC Role / Device Role / Timing Role: Central controller managing sensor polling via ADC, formatting data, and transmitting reports over USB HID interrupt endpoint. Use Value: Integrated USB PHY and DFU eliminate external transceiver and enable over-the-air firmware patches without disassembly or programming hardware. |
Use Scenario: Programmable industrial keypad with tactile feedback, LED indicators, and configurable button mapping. IC Role / Device Role / Timing Role: HID report generator with debounced GPIO scanning, LED PWM dimming, and USB report transmission at 10 ms intervals. Use Value: 25 mA open-drain outputs drive LEDs directly; 1024-byte RAM buffers multiple HID reports and maintains state during USB suspend. |
| USB-to-Serial Bridge | Embedded Power Monitor |
Use Scenario: Legacy RS-232/RS-485 equipment adapter connecting to modern PCs via USB. IC Role / Device Role / Timing Role: Protocol translator between SCI UART and USB CDC ACM class, handling line coding, control signals, and flow control. Use Value: Dual communication interfaces (SCI + USB) and 24 MHz clock support baud rates up to 115.2 kbps with minimal timing error. |
Use Scenario: DIN-rail mounted energy meter measuring AC line voltage/current using resistive dividers and shunt sensing. IC Role / Device Role / Timing Role: Analog front-end controller acquiring synchronized voltage/current samples via ADC, computing RMS values, and reporting via USB HID or custom class. Use Value: 12-channel ADC supports multi-signal acquisition; low-power Halt mode extends uptime in battery-backed backup operation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 8-bit USB microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ST72F324BJ4M1 | 16 KB Flash, 512-byte RAM, SO24 package, no USB transceiver (requires external PHY) | Lacks integrated USB PHY and DFU; limited I/O count and memory for complex HID descriptors | Select only if cost-sensitive, space-constrained designs omit USB connectivity or use external USB IC. |
| STM8S105K6T6 | 16 MHz STM8 core, 32 KB Flash, 2 KB RAM, integrated USB 2.0 FS, enhanced ADC (10-bit, 16 ch) | Higher performance, larger RAM, and full-speed USB - but requires different toolchain and lacks ST7 legacy code compatibility | Prefer for new designs needing higher throughput or future-proofing; not drop-in compatible due to architecture and register map differences. |
Compared with ST72F63BK6M1, ST72F324BJ4M1 reduces integration and USB capability for lower cost, while STM8S105K6T6 offers architectural modernization and USB full-speed at the expense of ST7 ecosystem continuity.
Availability
ST72F63BK6M1 is available at Aetrix Electronics and suitable for industrial sensor nodes, USB HID peripherals, USB-to-serial bridges, and embedded power monitors requiring stable component supply and long-term manufacturability.
Supply support for ST72F63BK6M1 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 management ICs, sensors, and automotive-grade components since 1987.
The ST7 family was engineered for cost-sensitive, low-power embedded control with integrated analog and communication peripherals - specifically targeting USB-connected industrial and consumer edge devices before the STM8 transition.
FAQ
Does ST72F63BK6M1 support USB full-speed (12 Mbps) operation?
No. ST72F63BK6M1 implements only low-speed USB (1.5 Mbps) compliant with USB 2.0 specification Section 7.1. It lacks the transceiver circuitry and timing precision required for full-speed operation. Applications requiring 12 Mbps must use STM32 or STM8S USB FS devices.
Can the internal 3.3 V USB regulator power external circuitry?
No. The internal 3.3 V regulator is dedicated solely to the USB transceiver and associated analog blocks. Its output is not accessible externally and is not rated for load currents beyond USB signaling requirements. External peripherals must be powered separately.
What is the maximum ADC sampling rate achievable with ST72F63BK6M1?
The ADC achieves up to 100 kSPS under optimal conditions (VDD ≥ 4.5 V, ADCCLK = fCPU/2). At 24 MHz CPU clock, this yields ~10 µs conversion time per sample. Throughput drops at lower supply voltages or when using internal RC clock source due to reduced ADCCLK stability.
Is ST72F63BK6M1 pin-compatible with other ST7263BKx variants?
Yes - all ST7263BKx devices in QFN40 package (including ST72F63BK6M1) share identical pinout and footprint. Differences are limited to Flash size (16 KB vs. 32 KB), RAM (512 vs. 1024 bytes), and option byte configuration; hardware design remains reusable across variants.
ST72F63BK6M1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- 34-BSOP (0.295", 7.50mm Width)
- Series:
- ST7
- Packaging:
- Tube
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Core Processor:
- ST7
- Core Size:
- 8-Bit
- Speed:
- 8MHz
- Connectivity:
- I2C, SCI, USB
- Peripherals:
- DMA, LVD, POR, PWM, WDT
- Number of I/O:
- 19
- Program Memory Size:
- 32KB (32K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- -
- RAM Size:
- 384 x 8
- Voltage - Supply (Vcc/Vdd):
- 4V ~ 5.5V
- Data Converters:
- A/D 8x8b
- Oscillator Type:
- Internal
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
ST72F63BK6M1 FAQ
1.How can I place an order for ST72F63BK6M1 through Aetrix?
Please submit a Request for Quotation (RFQ) for ST72F63BK6M1 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 ST72F63BK6M1 reliable?
The price and inventory of ST72F63BK6M1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ST72F63BK6M1 is usually 5 days.
3.What payment methods are accepted for ST72F63BK6M1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ST72F63BK6M1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ST72F63BK6M1?
ST72F63BK6M1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ST72F63BK6M1 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 ST72F63BK6M1?
For technical support, including ST72F63BK6M1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ST72F63BK6M1 requirements.
6.How does Aetrix verify that ST72F63BK6M1 is sourced from the original manufacturer or authorized distributors?
All ST72F63BK6M1 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 ST72F63BK6M1 meets industry standards.
7.What is the process for return or replacement of ST72F63BK6M1?
All ST72F63BK6M1 units undergo pre-shipment inspection (PSI). If there is an issue with ST72F63BK6M1, 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 ST72F63BK6M1 part is unused and in its original packaging.
Return procedure for ST72F63BK6M1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ST72F63BK6M1 Tags
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