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STMicroelectronics ST62T25CM6
- Part No.:
- ST62T25CM6
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 28-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
ST62T25CM6.pdf
- Description:
- IC MCU 8BIT 4KB OTP 28SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,663
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Product details
Overview
ST62T25CM6 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 supports automotive-grade temperature range (−40°C to +125°C) in a 28-pin SOIC package.
For engineers reviewing the ST62T25CM6 datasheet, ST62T25CM6 pinout, ST62T25CM6 application, or ST62T25CM6 equivalent, this page delivers verified technical context, validated pin functions, real-world use cases in safety-critical embedded control, and confirmed alternative options for legacy design continuity.
Technical Context
The ST62T25CM6 implements a Harvard-architecture 8-bit CPU core with 40 instructions and 9 addressing modes, paired with on-chip peripherals including a 7-bit prescalable 8-bit timer/counter and a configurable watchdog timer. Its clock system supports crystal, ceramic resonator, RC network, or external clock inputs, with Oscillator Safeguard (OSG) monitoring main oscillator integrity.
Reset management integrates asynchronous RESET pin, NMI input, LVD-triggered safe reset, and watchdog timeout recovery. Power management includes Wait and Stop modes, with I/O ports featuring 4 high-sink outputs (20mA) and 16 alternate-function lines for peripheral multiplexing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | 8-bit ST6 Harvard architecture with 40 instructions and 9 addressing modes |
| Program Memory | 4KB OTP ROM - user-programmable during production, no field reprogramming |
| RAM Size | 64 bytes - sufficient for small state machines and sensor data buffering |
| ADC Resolution | 8-bit with 16 analog input channels - enables multi-sensor monitoring without external MUX |
| Operating Voltage | 3.0V–6.0V - compatible with 5V industrial logic and battery-backed systems |
| Max Clock Frequency | 8MHz - supports real-time response in motor control and appliance timing loops |
| Temperature Range | −40°C to +125°C - qualified for under-hood automotive and industrial environments |
| I/O Sink Capability | 4 pins rated 20mA - directly drive LEDs or small relays without external drivers |
Pinout & Package
ST62T25CM6 is housed in a 28-pin SOIC (Small Outline Integrated Circuit) package, 300 mil width, with standard JEDEC MS-012AC footprint and 1.27 mm pitch. Pin functions are validated per ST's January 2009 Rev 4 datasheet (pages 7–8).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Power supply | Main 3.0–6.0V supply rail for core and I/O |
| VSS | Ground | Digital ground reference for all internal circuitry |
| OSCin / OSCout | Crystal/resonator interface | Connects to external 32kHz–8MHz crystal or ceramic resonator |
| RESET | Asynchronous reset input | Active-low, Schmitt-triggered; initiates full hardware reset sequence |
| NMI | Non-maskable interrupt | Edge-triggered input for critical fault handling (e.g., overtemperature) |
| PA0–PA3 | Port A, high-sink I/O | Bidirectional with 20mA sink capability - drive indicators or solenoids |
| PA4–PA7, PB0–PB7, PC4–PC7 | Analog input multiplexers | 16 dedicated ADC input channels - no external signal conditioning required |
| VPP | Programming voltage | 12.5V input for OTP programming - not used in normal operation |
Key Features
| Feature | Design Value |
|---|---|
| Oscillator Safeguard (OSG) | Monitors main oscillator failure and forces safe reset - prevents runaway execution |
| Low Voltage Detector (LVD) | Generates early warning reset below programmable threshold - avoids corrupted RAM writes |
| Two Power-Saving Modes | Wait mode halts CPU while preserving RAM/peripherals; Stop mode cuts >99% current draw |
| Hardware Watchdog Timer | Configurable timeout ensures recovery from software lockup without external components |
| Read-Out Protection | Enables code security by blocking unauthorized memory read access via VPP pin |
Applications
| Automotive Body Control | Industrial Sensor Node |
|---|---|
Use Scenario: Centralized control of door locks, window lifts, and interior lighting in entry-level vehicles. IC Role / Device Role / Timing Role: Main MCU executing state machine logic, sampling switch inputs, driving relay/LED loads via high-sink I/O. Use Value: Integrated 20mA sink outputs eliminate discrete driver transistors; OSG and LVD ensure fail-safe behavior during voltage transients. |
Use Scenario: Battery-powered environmental monitor collecting temperature, humidity, and voltage data in remote equipment cabinets. IC Role / Device Role / Timing Role: Low-power data acquisition controller using ADC inputs and Stop mode between readings. Use Value: 64-byte RAM suffices for local averaging; 3.0–6.0V operation supports aging Li-ion or alkaline cells without regulation. |
| Home Appliance Timer | Legacy Industrial PLC I/O Module |
Use Scenario: Cooking timer and safety interlock in microwave ovens with mechanical door switches and thermal cutoffs. IC Role / Device Role / Timing Role: Real-time scheduler managing countdown, buzzer output, and safety shutdown via NMI and watchdog. Use Value: 8MHz clock enables precise 100ms timing resolution; OTP memory ensures firmware immutability post-manufacture. |
Use Scenario: Retrofit I/O expansion module adding analog sensing to aging 24V DC PLC systems. IC Role / Device Role / Timing Role: Isolated ADC front-end with digital output over optocoupled UART or parallel bus. Use Value: 16-channel ADC allows multi-point monitoring; −40°C to +125°C rating matches industrial enclosure extremes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 8-bit microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ST62T25CJ6 | Same die, but in 28-pin PDIP package - no SOIC thermal or space advantage | Preferred for through-hole prototyping or legacy board rework where SOIC footprint unavailable | Select when manual soldering or socket-based testing is required; identical electrical behavior |
| ST62T15CM6 | 2KB OTP instead of 4KB; otherwise identical peripherals, pinout, and timing | Suitable for simpler firmware (e.g., single-function timers) where code size <2KB | Choose for cost-sensitive volume production where memory headroom is unnecessary |
Compared with ST62T25CM6, ST62T25CJ6 offers identical functionality in through-hole form for legacy assembly, while ST62T15CM6 reduces memory capacity by half - enabling lower-cost sourcing when firmware fits within 2KB and no future expansion is planned.
Availability
ST62T25CM6 is available at Aetrix Electronics and suitable for automotive body electronics, industrial sensor nodes, home appliance timers, and legacy PLC I/O modules requiring stable component supply across extended product lifecycles.
Supply support for ST62T25CM6 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 analog devices for industrial, automotive, and consumer markets.
The ST62xx family was engineered for cost-sensitive, safety-aware embedded control - emphasizing robust reset architecture, integrated analog peripherals, and OTP programmability for rapid deployment in appliances and automotive subsystems.
FAQ
Is ST62T25CM6 still in active production?
No - ST62T25CM6 is marked obsolete by STMicroelectronics as of its last public datasheet revision (January 2009). However, Aetrix Electronics maintains verified legacy stock with full traceability and supports long-term supply for maintenance and replacement programs.
Can ST62T25CM6 be programmed after soldering to the PCB?
No - ST62T25CM6 uses One-Time Programmable (OTP) memory. Programming must occur before mounting, using a dedicated programmer applying 12.5V to the VPP pin. Post-solder programming is electrically impossible and would damage the device.
What is the role of the Oscillator Safeguard (OSG) feature?
OSG continuously monitors the main oscillator's activity. If oscillation stops (e.g., due to crystal fracture or capacitor failure), OSG triggers a hardware reset within 4 clock cycles - preventing undetected MCU hang and ensuring deterministic fail-safe behavior.
Does ST62T25CM6 support in-circuit debugging?
No - ST62T25CM6 lacks on-chip debug interfaces (e.g., SWD, JTAG). Development relies on external emulators or ROM/EPROM variants (e.g., ST62E25C) with dedicated programming and verification tools referenced in ST Application Note AN1015.
ST62T25CM6 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- 28-SOIC (0.295", 7.50mm Width)
- Series:
- ST6
- Packaging:
- Tube
- 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 FAQ
1.How can I place an order for ST62T25CM6 through Aetrix?
Please submit a Request for Quotation (RFQ) for ST62T25CM6 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 reliable?
The price and inventory of ST62T25CM6 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ST62T25CM6 is usually 5 days.
3.What payment methods are accepted for ST62T25CM6?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ST62T25CM6 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ST62T25CM6?
ST62T25CM6 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ST62T25CM6 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?
For technical support, including ST62T25CM6 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ST62T25CM6 requirements.
6.How does Aetrix verify that ST62T25CM6 is sourced from the original manufacturer or authorized distributors?
All ST62T25CM6 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 meets industry standards.
7.What is the process for return or replacement of ST62T25CM6?
All ST62T25CM6 units undergo pre-shipment inspection (PSI). If there is an issue with ST62T25CM6, 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 part is unused and in its original packaging.
Return procedure for ST62T25CM6:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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