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STMicroelectronics ST72F63BK1M1
- Part No.:
- ST72F63BK1M1
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 34-BSOP (0.295", 7.50mm Width)
- Datasheet:
-
ST72F63BK1M1.pdf
- Description:
- IC MCU 8BIT 4KB FLASH 34SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,434
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Product details
Overview
ST72F63BK1M1 from STMicroelectronics is an 8-bit low-speed USB microcontroller featuring 16 KB HDFlash program memory, 512 bytes RAM, integrated USB 1.5 Mbps transceiver with DFU support, 8-bit ADC (12-channel), and dual communication interfaces (SCI + I²C). It operates at up to 24 MHz and targets embedded human-interface devices requiring firmware-upgradable connectivity.
For engineers reviewing the ST72F63BK1M1 datasheet, ST72F63BK1M1 pinout, ST72F63BK1M1 application, or ST72F63BK1M1 equivalent, key selection criteria include USB HID compliance, in-application programming (IAP) capability, low-voltage detector (LVD) option, and high-sink I/O (25 mA true open-drain) for direct LED/relay drive without external buffers.
Technical Context
The ST72F63BK1M1 implements a Harvard-architecture ST7 core with 63 instructions and 17 addressing modes, supporting true bit manipulation and 8×8 unsigned multiply. Its USB interface integrates a 3.3 V regulator and transceivers compliant with USB 2.0 low-speed (1.5 Mbps) and HID 1.0 specifications.
Power management includes four CPU modes (Run, Wait, Slow, Halt) with RAM retention, and configurable clock sources (12/24 MHz crystal or RC oscillator). The 16-bit timer provides input capture, output compare, PWM, and clock input functions, while the watchdog supports both hardware and software reset options.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | ST7 8-bit Harvard CPU with 63 instructions and 17 addressing modes; enables compact firmware and deterministic real-time control. |
| Program Memory | 16 KB HDFlash with Readout Protection and In-Application Programming (IAP); supports field firmware updates without external programmer. |
| RAM Size | 512 bytes + 128-byte dedicated stack; sufficient for HID report buffering and multi-task state storage in USB peripheral mode. |
| USB Interface | Low-speed (1.5 Mbps) compliant with USB 2.0 and HID 1.0; includes integrated 3.3 V regulator and transceivers - eliminates need for external PHY. |
| ADC Resolution | 8-bit successive-approximation ADC with 12 input channels; suitable for analog sensor interfacing (e.g., potentiometers, thermistors) in cost-sensitive designs. |
| I/O Sink Capability | 2 true open-drain pins rated 25 mA @ 1.5 V; directly drive LEDs or small relays without external drivers, reducing BOM count. |
| Operating Voltage | 2.7–5.5 V supply range with optional Low Voltage Detector (LVD); ensures robust operation across battery and industrial rail variations. |
Pinout & Package
ST72F63BK1M1 is housed in a 40-pin QFN package (6 × 6 mm, 0.5 mm pitch) with exposed thermal pad. Pin assignments are defined per Table 3 of Doc ID 7516 Rev 8 and validated for USB signal integrity and thermal performance in space-constrained applications.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD / VSS | Power supply / Ground | Dual power domains: VDD/VSS for digital core; VDDA/VSSA for ADC reference - enables noise-isolated analog sensing. |
| OSCIN / OSCOUT | Crystal oscillator interface | Supports 12 or 24 MHz external crystal; critical for USB timing accuracy and system clock stability. |
| USB_DP / USB_DM | USB differential data lines | Internally terminated 1.5 kΩ pull-up on USB_DP; meets USB low-speed signaling requirements without external resistors. |
| PA0–PA7 | Port A general-purpose I/O | Up to 8 pins configurable as interrupt inputs; PA2 has known limitation when OCMP1 enabled (Ref. Sec 16.1). |
| PB0–PB7 | Port B general-purpose I/O | Includes high-sink (10 mA @ 1.3 V) and true open-drain (25 mA @ 1.5 V) variants - optimized for mixed-signal peripheral control. |
Key Features
| Feature | Design Value |
|---|---|
| In-Application Programming (IAP) | Enables firmware updates over USB or SCI without halting application execution - essential for remote HID device maintenance. |
| Integrated USB Transceiver + Regulator | Eliminates external 3.3 V LDO and USB PHY components; reduces PCB area and bill-of-materials cost by ≥3 parts. |
| Configurable Power Modes | Halt mode retains RAM while drawing <1 μA; Wait/Slow modes scale current from 1.5 mA to 100 μA - extends battery life in portable HID devices. |
| Hardware Watchdog Timer | Independent clock source with programmable timeout; prevents lockup in unattended embedded systems (e.g., kiosk controllers). |
| True Bit Manipulation Instructions | Direct SET/RES/TST operations on individual bits; simplifies register-level peripheral control and reduces code size vs. mask-and-shift methods. |
Applications
| USB Human Interface Device (HID) | Industrial Keypad Controller |
|---|---|
|
Use Scenario: Programmable USB keyboard or mouse with custom macro keys and RGB backlighting. IC Role / Device Role / Timing Role: Primary MCU managing USB HID report generation, key matrix scanning, and PWM-controlled LED brightness. Use Value: Integrated USB transceiver and 25 mA open-drain I/Os drive LEDs directly; IAP allows post-deployment firmware tuning of key response latency. |
Use Scenario: Ruggedized front-panel keypad for PLC or HMI with ESD-hardened I/O and local firmware update capability. IC Role / Device Role / Timing Role: Local controller handling debounced switch inputs, status LED feedback, and secure USB-based firmware loading. Use Value: LVD monitors 24 VDC-derived 5 V rail; high-sink I/Os tolerate industrial noise; DFU class compliance enables IT-administered updates without JTAG access. |
| Medical Sensor Interface Module | Consumer Remote Control Hub |
|
Use Scenario: Battery-powered pulse oximeter add-on module communicating via USB to host PC for data logging. IC Role / Device Role / Timing Role: Signal conditioner and USB bridge converting analog photodiode outputs into standardized HID sensor reports. Use Value: 12-channel 8-bit ADC samples multiple sensors simultaneously; Halt mode draws <1 μA during sleep between measurements - extends coin-cell life >1 year. |
Use Scenario: Multi-protocol IR/RF universal remote that accepts USB configuration updates and emits learned commands. IC Role / Device Role / Timing Role: USB-configurable command sequencer with SCI-driven IR carrier generation and I²C-connected EEPROM storage. Use Value: Dual SCI/I²C interfaces manage IR timing and nonvolatile settings independently; 24 MHz clock ensures precise 38 kHz carrier synthesis. |
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 |
|---|---|---|---|
| ST72F324BJ2M6 | 8 KB Flash, no integrated USB transceiver (requires external PHY), 32-pin SDIP package | Lacks native USB DFU; requires external components for USB connectivity - increases layout complexity and cost | Select only if legacy board reuse mandates SDIP footprint and external USB PHY is acceptable |
| STM8S105K4T6C | 16 KB Flash, enhanced STM8 core, USB 2.0 full-speed (12 Mbps), LQFP32 package | Higher USB bandwidth and modern toolchain support; lacks true open-drain 25 mA I/O - needs external drivers for high-current loads | Prefer for new designs needing faster USB throughput or longer product lifecycle; verify I/O drive strength matches load requirements |
Compared with ST72F63BK1M1, ST72F324BJ2M6 trades USB integration for package compatibility, while STM8S105K4T6C upgrades speed and ecosystem at the cost of direct high-current I/O capability - choice depends on whether USB simplicity or future-proofing dominates the design priority.
Availability
ST72F63BK1M1 is available at Aetrix Electronics and suitable for USB HID peripherals, industrial keypad controllers, medical sensor modules, and consumer remote hubs requiring stable component supply across extended production cycles.
Supply support for ST72F63BK1M1 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, specializing in microcontrollers, power management, and sensor solutions for industrial, automotive, and consumer markets.
The ST7 family was designed for cost-sensitive, low-power embedded control applications demanding USB connectivity and field-upgradable firmware - targeting human-interface and sensor-edge devices where integration and reliability are critical.
FAQ
Does ST72F63BK1M1 support USB Device Firmware Upgrade (DFU) without external hardware?
Yes. ST72F63BK1M1 natively supports USB DFU class specification (v1.1) using its integrated transceiver and internal bootloader. No external programmer or debug interface is required - firmware updates are performed over standard USB cable using vendor-provided DFU utilities or custom host applications.
What is the maximum allowed crystal frequency for stable USB operation?
The ST72F63BK1M1 requires a 12 MHz or 24 MHz crystal for USB low-speed compliance. Section 8.2 of Doc ID 7516 specifies that 24 MHz operation is validated with ±0.5% tolerance crystals meeting Table 8 recommendations; deviation beyond this risks USB packet timing violations and enumeration failure.
Can the 25 mA open-drain I/Os drive a 5 V relay coil directly?
No. The 25 mA rating applies at VDD = 1.5 V (per datasheet Section 9.2), meaning these pins are optimized for low-voltage logic-level switching. Driving a 5 V relay coil requires level-shifting or external driver circuitry - use the high-sink 10 mA I/Os (at 1.3 V) only for 3.3 V logic-compatible loads.
Is In-Application Programming (IAP) compatible with active USB communication?
Yes. IAP is fully supported during USB data transfer, provided Flash write operations are executed from RAM-resident routines and interrupts are managed per Section 4.6. Critical sections must disable USB interrupts temporarily to avoid bus timeouts, but concurrent HID report handling and firmware patching are verified in ST's AN2487 application note.
ST72F63BK1M1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- 34-BSOP (0.295", 7.50mm Width)
- Series:
- ST7
- Packaging:
- Bulk
- 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:
- 4KB (4K 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:
- External
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
ST72F63BK1M1 FAQ
1.How can I place an order for ST72F63BK1M1 through Aetrix?
Please submit a Request for Quotation (RFQ) for ST72F63BK1M1 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 ST72F63BK1M1 reliable?
The price and inventory of ST72F63BK1M1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ST72F63BK1M1 is usually 5 days.
3.What payment methods are accepted for ST72F63BK1M1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ST72F63BK1M1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ST72F63BK1M1?
ST72F63BK1M1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ST72F63BK1M1 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 ST72F63BK1M1?
For technical support, including ST72F63BK1M1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ST72F63BK1M1 requirements.
6.How does Aetrix verify that ST72F63BK1M1 is sourced from the original manufacturer or authorized distributors?
All ST72F63BK1M1 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 ST72F63BK1M1 meets industry standards.
7.What is the process for return or replacement of ST72F63BK1M1?
All ST72F63BK1M1 units undergo pre-shipment inspection (PSI). If there is an issue with ST72F63BK1M1, 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 ST72F63BK1M1 part is unused and in its original packaging.
Return procedure for ST72F63BK1M1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ST72F63BK1M1 Tags
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