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STMicroelectronics ST62T25CM6/TR
- Part No.:
- ST62T25CM6/TR
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 28-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
ST62T25CM6/TR.pdf
- Description:
- IC MCU 8BIT 4KB OTP 28SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,727
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Product details
Overview
ST62T25CM6/TR from STMicroelectronics is an 8-bit OTP microcontroller with 4KB program memory, 64 bytes RAM, integrated 8-bit ADC (16-channel), dual timers (including watchdog), oscillator safeguard, and low-voltage detector. It operates from 3.0V to 6.0V at up to 8MHz and targets automotive body electronics, appliance control, and industrial sensor interfaces.
For engineers reviewing the ST62T25CM6/TR datasheet, ST62T25CM6/TR pinout, ST62T25CM6/TR application, or ST62T25CM6/TR equivalent, this page delivers verified technical context, validated pin functions, real-world use cases, and confirmed alternative options for embedded control designs requiring safe reset, analog sensing, and low-power operation.
Technical Context
The ST62T25CM6/TR implements a Harvard-architecture 8-bit CPU core with 40 instructions and 9 addressing modes. Its clock system supports crystal, RC, or external clock inputs, plus a backup LFAO and Oscillator Safeguard (OSG) to detect clock failure and force safe reset.
Interrupt handling includes 4 vectors plus NMI and RESET, with 20 configurable external interrupt lines mapped across I/O ports. Power management provides Wait and Stop modes, enabled by LVD-triggered reset and programmable watchdog timer with timeout control.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | 8-bit ST6 HCMOS CPU with 40 instructions and 9 addressing modes - enables compact firmware and deterministic timing for real-time control loops. |
| Program Memory | 4KB OTP - provides one-time programmable nonvolatile storage suitable for production firmware with read-out protection. |
| RAM | 64 bytes - sufficient for stack, registers, and small data buffers in resource-constrained embedded applications. |
| ADC | 8-bit resolution, 16 input channels - supports simultaneous monitoring of multiple analog sensors (e.g., temperature, voltage, potentiometer) without external MUX. |
| Timers | One 8-bit timer/counter with 7-bit prescaler + independent watchdog timer - enables precise interval timing and system-level fault recovery. |
| Supply Range | 3.0V to 6.0V - compatible with 5V industrial logic and battery-backed systems down to 3V, with LVD ensuring reliable reset below threshold. |
| Max Clock Frequency | 8MHz - balances performance and power efficiency for cost-sensitive control applications. |
| Operating Temperature | −40°C to +125°C - qualified for under-hood automotive and industrial environments with thermal stress. |
Pinout & Package
ST62T25CM6/TR is housed in a 28-pin SOIC (Small Outline Integrated Circuit) package, designated SO28 per ST's ordering information. Pin functions are validated per Section 2 ("Pin Description") of the official ST6225C datasheet (Rev 4, Jan 2009).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Power supply | Primary 3.0–6.0V supply rail; decoupling required near pin for stable core and peripheral operation. |
| VSS | Ground reference | Digital ground return path; must be low-impedance and tied to system GND plane. |
| OSCin / OSCout | Crystal/resonator interface | Connects to external crystal or ceramic resonator (1–8MHz); OSG monitors oscillation integrity. |
| RESET | Asynchronous active-low reset | Forces hardware reset on falling edge; internal pull-up; compatible with external reset ICs or RC networks. |
| NMI | Non-maskable interrupt input | Edge-triggered critical event input (e.g., emergency stop, safety fault) that bypasses interrupt masking. |
| PA0–PA3 | High-sink I/O (20mA) | Direct drive capability for LEDs, relays, or small solenoids without external drivers. |
| PA4–PA7, PB0–PB7, PC4–PC7 | Analog input multiplexing | 16 dedicated ADC input channels - each mapped to specific port pins for flexible sensor routing. |
| PORT A/B/C Data Registers | Bi-directional I/O control | Software-configurable direction and data latching; alternate functions include timer/ADC trigger signals. |
Key Features
| Feature | Design Value |
|---|---|
| Oscillator Safeguard (OSG) | Hardware circuit continuously monitors main oscillator; triggers safe reset if clock stops - eliminates silent hang in safety-critical systems. |
| Low Voltage Detector (LVD) | Internally calibrated threshold (~2.5V typical) forces reset before supply collapse corrupts RAM or program execution. |
| Two Power-Saving Modes | Wait mode halts CPU while preserving RAM and enabling wake-on-interrupt; Stop mode disables all clocks except LFAO for ultra-low leakage. |
| 4KB OTP with Read-Out Protection | Prevents firmware reverse engineering via external read attempts - essential for IP protection in volume production. |
| 20 Multifunction I/O Lines | Includes 16 analog-capable pins and 4 high-current outputs - reduces BOM count by integrating sensing, control, and actuation. |
Applications
| Automotive Body Control | Smart Appliance Interface |
|---|---|
|
Use Scenario: Centralized control of door locks, window lifts, and interior lighting in entry-level vehicles. IC Role / Device Role / Timing Role: Primary MCU executing state machines, sampling switch inputs, driving relays/LEDs, and managing LIN bus communication via GPIO bit-banging. Use Value: Integrated 20mA sink outputs directly drive indicator LEDs; 16-channel ADC monitors potentiometers and thermistors; OSG ensures fail-safe behavior during engine cranking voltage dip. |
Use Scenario: Real-time monitoring and control of washing machine drum speed, water temperature, and detergent dispensing. IC Role / Device Role / Timing Role: Sensor fusion hub acquiring analog signals (NTC, pressure transducer), generating PWM for motor control, and sequencing cycle stages using 8-bit timer interrupts. Use Value: 8MHz max clock enables sub-10ms loop timing; LVD prevents erratic behavior during brown-out; OTP memory secures proprietary wash algorithms. |
| Industrial Sensor Node | Medical Diagnostic Equipment |
|
Use Scenario: Battery-powered environmental monitor logging temperature, humidity, and CO₂ in HVAC ducts. IC Role / Device Role / Timing Role: Low-power data acquisition node using Stop mode between 1-second ADC conversions, waking on timer interrupt to process and transmit readings. Use Value: 64-byte RAM retains calibration coefficients across Stop mode; −40°C to +125°C rating ensures reliability in unconditioned spaces; SO28 package supports automated PCB assembly. |
Use Scenario: Front-end signal conditioning and button interface in portable blood glucose meters. IC Role / Device Role / Timing Role: Analog front-end controller reading test strip voltages via ADC, debouncing tactile buttons, and managing LCD contrast via GPIO. Use Value: 8-bit ADC resolution meets ISO 15197 accuracy requirements for Class II devices; 3.0V min supply allows single-cell lithium operation; read-out protection safeguards FDA-submitted firmware. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 8-bit microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ST62T20CM6/TR | 2KB OTP memory, otherwise identical peripheral set and pinout. | Suitable where firmware size ≤2KB; lower cost but no headroom for feature expansion. | Select when code footprint is verified under 2KB and BOM cost optimization is prioritized over future updates. |
| STM8S003F3P6 | Enhanced 8-bit core, 8KB Flash, 1KB RAM, 10-bit ADC, higher clock (16MHz), modern toolchain support. | Requires PCB redesign (20-pin TSSOP); better suited for new designs needing scalability and debug flexibility. | Choose for new development targeting longer lifecycle, improved ADC precision, or SWD debugging - not drop-in replacement. |
Compared with ST62T25CM6/TR, ST62T20CM6/TR offers reduced memory at lower cost for fixed-function legacy designs, while STM8S003F3P6 provides architectural modernization and expanded resources at the expense of board-level compatibility.
Availability
ST62T25CM6/TR is available at Aetrix Electronics and suitable for automotive body electronics, smart appliance control, and industrial sensor nodes requiring stable component supply across extended product lifecycles.
Supply support for ST62T25CM6/TR 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 ICs, sensors, and discrete components for industrial, automotive, and consumer markets.
The ST62xx family was engineered for cost-sensitive, safety-aware embedded control applications - emphasizing robust reset architecture, analog integration, and OTP programmability for rapid deployment in appliances and automotive subsystems.
FAQ
Is ST62T25CM6/TR still in active production?
No - ST62T25CM6/TR is marked obsolete by STMicroelectronics per the January 2009 datasheet cover page. However, Aetrix Electronics maintains legacy inventory with full traceability and offers lifecycle management support including last-time-buy planning and cross-reference guidance for migration paths.
What programming tools are required for ST62T25CM6/TR?
OTP programming requires ST's dedicated ST62 programmer (e.g., ST62PROG or compatible third-party units) and ST62-specific software (ST Visual Programmer). The device does not support in-circuit reprogramming; code must be finalized before programming, as OTP cannot be erased or rewritten.
Does ST62T25CM6/TR support external memory expansion?
No - the ST62T25CM6/TR lacks external address/data bus pins and has no built-in memory interface logic. Its architecture is self-contained with on-chip 4KB OTP and 64-byte RAM; all code and data must reside internally.
Can the ADC operate during Stop mode?
No - the ADC requires the main system clock and is disabled in Stop mode. However, the device can wake from Stop mode via timer interrupt, then initiate ADC conversion in Run mode, achieving low average power in duty-cycled sensing applications.
ST62T25CM6/TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- 28-SOIC (0.295", 7.50mm Width)
- Series:
- ST6
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Core Processor:
- ST6
- Core Size:
- 8-Bit
- Speed:
- 8MHz
- Connectivity:
- -
- Peripherals:
- LVD, POR, WDT
- Number of I/O:
- 20
- Program Memory Size:
- 4KB (4K x 8)
- Program Memory Type:
- OTP
- EEPROM Size:
- -
- RAM Size:
- 64 x 8
- Voltage - Supply (Vcc/Vdd):
- 3V ~ 6V
- Data Converters:
- A/D 16x8b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
ST62T25CM6/TR FAQ
1.How can I place an order for ST62T25CM6/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for ST62T25CM6/TR 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 ST62T25CM6/TR reliable?
The price and inventory of ST62T25CM6/TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ST62T25CM6/TR is usually 5 days.
3.What payment methods are accepted for ST62T25CM6/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ST62T25CM6/TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ST62T25CM6/TR?
ST62T25CM6/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ST62T25CM6/TR 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 ST62T25CM6/TR?
For technical support, including ST62T25CM6/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ST62T25CM6/TR requirements.
6.How does Aetrix verify that ST62T25CM6/TR is sourced from the original manufacturer or authorized distributors?
All ST62T25CM6/TR 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 ST62T25CM6/TR meets industry standards.
7.What is the process for return or replacement of ST62T25CM6/TR?
All ST62T25CM6/TR units undergo pre-shipment inspection (PSI). If there is an issue with ST62T25CM6/TR, 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 ST62T25CM6/TR part is unused and in its original packaging.
Return procedure for ST62T25CM6/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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