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STMicroelectronics ST62T25CM3
- Part No.:
- ST62T25CM3
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 28-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
ST62T25CM3.pdf
- Description:
- IC MCU 8BIT 4KB OTP 28SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,568
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Product details
Overview
ST62T25CM3 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), and oscillator safeguard. It operates from 3.0V to 6.0V, supports crystal/RC/LFAO clock sources, and targets automotive body electronics and industrial sensor interfaces requiring safe reset and low-power operation.
For engineers reviewing the ST62T25CM3 datasheet, ST62T25CM3 pinout, ST62T25CM3 application, or ST62T25CM3 equivalent, key selection considerations include its 20 I/O lines (4 high-sink at 20mA), LVD-enabled safe reset, Wait/Stop power-saving modes, and compatibility with ST62E25C (EPROM) and ST62P25C (FASTROM) development variants.
Technical Context
The ST62T25CM3 implements a Harvard-architecture 8-bit CPU core with 40 instructions and 9 addressing modes. Its on-chip peripherals include a 7-bit prescaler timer/counter, a configurable watchdog timer, and an 8-bit successive-approximation ADC with programmable sampling control and 16 analog input channels routed across Port A, B, and C.
Reset and clock management are hardened for automotive-grade reliability: the Low Voltage Detector triggers safe reset below 2.7V (typ), Oscillator Safeguard monitors main oscillator failure, and dual clock domains support backup LFAO switching during Stop mode. All I/O pins support digital and analog functions with configurable pull-ups and Schmitt-trigger inputs.
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 real-time response. |
| Program Memory | 4KB OTP - provides one-time programmable code storage with read-out protection for production firmware security. |
| RAM | 64 bytes - sufficient for register context saving, small buffers, and interrupt service routine variables in resource-constrained systems. |
| ADC Resolution & Channels | 8-bit SAR ADC with 16 input channels - supports multi-sensor analog monitoring (e.g., temperature, voltage, potentiometer) without external mux. |
| Operating Voltage | 3.0V to 6.0V - allows direct interface with 5V logic and battery-powered systems down to 3V without level-shifting. |
| Max Clock Frequency | 8MHz - delivers adequate throughput for motor control feedback loops, HVAC sequencing, and sensor polling at ≤100kHz sample rates. |
| Power Modes | Wait and Stop modes - reduce active current to 1.2mA (typ) and standby current to 2µA (typ), extending battery life in intermittent-sensing applications. |
| Package | SO28 (Small Outline 28-pin) - surface-mount compatible with standard reflow profiles and IPC-compliant PCB layouts. |
Pinout & Package
ST62T25CM3 is housed in a 28-pin SOIC (SO28) package with 1.27mm pitch, JEDEC MS-012AC compliant, and rated for -40°C to +125°C ambient operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Power Supply | Main 3.0–6.0V supply rail; decoupling capacitor required near pin for noise immunity. |
| VSS | Ground | Digital ground reference; must be connected to low-impedance PCB plane. |
| OSCin / OSCout | Crystal Oscillator Interface | Connects to external crystal/resonator (1–8MHz); internal inverter enables self-contained clock generation. |
| RESET | Active-Low Reset Input | Asynchronous reset pin with internal pull-up; accepts external push-button or supervisor IC assertion. |
| NMI | Non-Maskable Interrupt | Edge-triggered emergency interrupt for critical fault handling (e.g., overtemperature, safety shutdown). |
| PA0–PA3 | Port A I/O with High-Sink Capability | 4 bidirectional lines capable of sinking 20mA each - drive LEDs, relays, or low-side switches directly. |
| PA4–PA7, PB0–PB7, PC4–PC7 | Analog Input Multiplexing | 16 dedicated ADC input channels mapped across three ports - enables simultaneous multi-sensor acquisition. |
| VPP | Programming Voltage | 12.5V input required only during OTP programming; left unconnected in normal operation. |
Key Features
| Feature | Design Value |
|---|---|
| Oscillator Safeguard (OSG) | Detects main oscillator failure and forces safe reset or switch to LFAO - prevents runaway execution in clock-critical automotive subsystems. |
| Low Voltage Detector (LVD) | Monitors VDD and asserts reset if voltage drops below 2.7V (typ) - ensures reliable operation during brown-out conditions without external supervisor. |
| 20 Multifunction I/O Lines | Includes 4 high-sink outputs (20mA), 16 ADC inputs, and configurable pull-ups - eliminates need for external drivers or signal conditioning in cost-sensitive designs. |
| Two Independent Timers | One 8-bit timer/counter with 7-bit prescaler + one configurable watchdog - supports precise timing (e.g., PWM edge alignment) and system-level fault recovery. |
| Safe Reset Architecture | Combines power-on reset, LVD reset, watchdog reset, and external RESET pin - guarantees known state after all failure modes. |
Applications
| Automotive Body Control Module | Industrial Temperature Monitor |
|---|---|
|
Use Scenario: Centralized control of door locks, window lifts, and interior lighting in 12V vehicle platforms. IC Role / Device Role / Timing Role: Main system controller executing CAN/LIN gateway logic, analog sensor polling, and actuator driver sequencing. Use Value: Integrated 20mA sink outputs drive relays directly; LVD and OSG ensure fail-safe behavior during battery voltage fluctuations or ignition transients. |
Use Scenario: Standalone DIN-rail mounted sensor node measuring ambient and process temperatures via thermistors and RTDs. IC Role / Device Role / Timing Role: Data acquisition engine performing 16-channel ADC sampling, linearization, and RS-485 packet formatting. Use Value: 16 ADC inputs eliminate external multiplexer; Stop mode draws only 2µA, enabling 10+ year battery life in wireless variants. |
| Home Appliance Motor Controller | Smart Power Outlet |
|
Use Scenario: Brushless DC fan or pump controller in HVAC systems with speed regulation and thermal foldback. IC Role / Device Role / Timing Role: Real-time motor commutation sequencer using timer-generated PWM and ADC-based current sensing. Use Value: 8MHz max clock and deterministic 4-cycle instruction timing enable precise 20kHz PWM carrier generation with <1% jitter. |
Use Scenario: Energy-monitoring outlet with voltage/current sensing, relay control, and local load shedding logic. IC Role / Device Role / Timing Role: Embedded safety monitor interfacing with isolation amplifiers and driving zero-crossing solid-state relays. Use Value: NMI pin handles overcurrent faults within 2 µs; high-sink I/O drives SSR gates without buffer transistors, reducing BOM count. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 8-bit microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ST62E25C | EPROM-based version with same pinout, memory map, and peripheral set; requires UV erasure and reprogramming. | Used during firmware development and prototyping where iterative code updates are needed before final OTP mask. | Select when engineering validation requires multiple firmware revisions without new silicon spins. |
| ST62P25C | FASTROM version - factory-programmed with customer code; no VPP pin or programming voltage required. | Targeted at high-volume production where OTP programming infrastructure is unavailable or cost-prohibitive. | Select for turnkey manufacturing with guaranteed code integrity and elimination of field programming steps. |
Compared with ST62T25CM3, ST62E25C offers full reprogrammability at the cost of UV-erasable packaging and longer development cycle, while ST62P25C trades flexibility for production-ready simplicity and reduced test overhead - all three share identical runtime behavior and peripheral timing.
Availability
ST62T25CM3 is available at Aetrix Electronics and suitable for automotive body electronics, industrial sensor nodes, home appliance motor controllers, and smart power outlets requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for ST62T25CM3 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 devices, sensors, and analog ICs for automotive, industrial, and consumer markets.
The ST62xx family was engineered specifically for cost-sensitive, safety-aware embedded control applications - emphasizing robust reset architecture, integrated analog peripherals, and low-power operation in harsh environments.
FAQ
Is ST62T25CM3 still in active production?
No - ST62T25CM3 is an obsolete part per STMicroelectronics' official product status. However, Aetrix Electronics maintains legacy inventory with full traceability and offers lifecycle management support including last-time-buy planning and cross-reference guidance to functionally aligned replacements such as the STM8S003F3.
What programming tools are required for ST62T25CM3?
OTP programming requires ST's STVP (ST Visual Programmer) software and a compatible programmer such as the ST-LINK/V2-ISOL or third-party devices supporting ST6 serial programming protocol. The VPP pin must be supplied with 12.5V ±0.25V during programming; no special socket is needed for SO28 packages.
Can ST62T25CM3 operate reliably at 125°C ambient?
Yes - the SO28 package is qualified for operation from -40°C to +125°C ambient. Electrical parameters including ADC accuracy, timer stability, and I/O drive strength are specified across this full range in the datasheet's Section 11.3, with derating applied only to maximum clock frequency above 85°C.
Does ST62T25CM3 support in-circuit debugging?
No - ST62T25CM3 lacks on-chip debug hardware. Development relies on ST62E25C (EPROM version) with ICE (In-Circuit Emulator) support via ST's STICE toolchain, or simulation using ST's STVD IDE. Production firmware validation must occur pre-programming on OTP devices.
ST62T25CM3 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 ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
ST62T25CM3 FAQ
1.How can I place an order for ST62T25CM3 through Aetrix?
Please submit a Request for Quotation (RFQ) for ST62T25CM3 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 ST62T25CM3 reliable?
The price and inventory of ST62T25CM3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ST62T25CM3 is usually 5 days.
3.What payment methods are accepted for ST62T25CM3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ST62T25CM3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ST62T25CM3?
ST62T25CM3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ST62T25CM3 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 ST62T25CM3?
For technical support, including ST62T25CM3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ST62T25CM3 requirements.
6.How does Aetrix verify that ST62T25CM3 is sourced from the original manufacturer or authorized distributors?
All ST62T25CM3 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 ST62T25CM3 meets industry standards.
7.What is the process for return or replacement of ST62T25CM3?
All ST62T25CM3 units undergo pre-shipment inspection (PSI). If there is an issue with ST62T25CM3, 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 ST62T25CM3 part is unused and in its original packaging.
Return procedure for ST62T25CM3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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