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STMicroelectronics ST62T03CM3/TR
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- Part No.:
- ST62T03CM3/TR
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 16-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
ST62T03CM3/TR.pdf
- Description:
- IC MCU 8BIT 1KB OTP 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,347
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Product details
Overview
ST62T03CM3/TR from STMicroelectronics is an 8-bit OTP microcontroller with 1KB program memory, 64 bytes RAM, integrated 8-bit ADC (4-channel), dual timers (including watchdog), oscillator safeguard, and low-voltage detector. It operates from 3.0V to 6.0V across –40°C to +125°C and targets automotive body electronics, appliance control, and industrial sensor interfaces.
For engineers reviewing the ST62T03CM3/TR datasheet, ST62T03CM3/TR pinout, ST62T03CM3/TR application, or ST62T03CM3/TR equivalent, key selection criteria include its 16-pin SOIC package, 8MHz max clock, high-sink I/O (20mA), Wait/Stop power modes, and analog input capability for embedded control where cost, temperature resilience, and mixed-signal integration are critical.
Technical Context
The ST62T03CM3/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, servicing 9 external interrupt lines mapped across two vectors. The peripheral set integrates an 8-bit timer/counter with 7-bit prescaler, configurable watchdog timer, and 8-bit ADC with four selectable analog input channels - though ADC is excluded on ST6203C variants per device summary.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | 8-bit ST6 Harvard CPU with 40 instructions and 9 addressing modes - enables compact firmware and deterministic timing for real-time control loops. |
| Program Memory | 1KB OTP - provides one-time programmable, tamper-resistant code storage without need for external EPROM programmer in production. |
| RAM Size | 64 bytes - sufficient for register shadowing, stack depth (up to 6 levels), and small variable sets in resource-constrained applications. |
| Supply Voltage | 3.0V to 6.0V - supports direct battery operation (e.g., 4×AA, lead-acid) and compatibility with legacy 5V logic systems. |
| Operating Temperature | –40°C to +125°C - qualified for under-hood automotive, industrial motor drives, and HVAC control environments. |
| Max Clock Frequency | 8MHz - balances processing throughput and EMI reduction; supports precise 1ms timer ticks at full speed with prescaler. |
| I/O Sink Current | 20mA per selected output (PA1–PA3) - drives LEDs, relays, or small solenoids directly without external buffers. |
Pinout & Package
ST62T03CM3/TR is housed in a 16-pin SOIC (Small Outline Integrated Circuit) package, compliant with JEDEC MS-012AC, 1.27mm pitch, and RoHS-compliant. Pin functions are validated per ST's Doc ID 4563 Rev 5, Section 2 (Pin Description).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Power supply | Primary 3.0–6.0V supply rail; decoupling capacitor required near pin for noise immunity in mixed-signal operation. |
| VSS | Ground reference | Digital ground return; must be low-impedance and separated from analog ground if external ADC references used. |
| OSCIN / OSCOUT | Crystal/resonator interface | Differential oscillator input/output pair; supports 32kHz–8MHz crystals or ceramic resonators with internal feedback path. |
| RESET | Asynchronous active-low reset | Hardware-initiated reset with internal pull-up; triggers full state initialization and clears watchdog timer. |
| NMI | Non-maskable interrupt | Edge-triggered emergency interrupt (rising/falling configurable); bypasses interrupt mask for fault recovery. |
| PA0–PA3 | Port A bidirectional I/O | PA1–PA3 support 20mA sink; PA0 may serve as ADC input or general-purpose I/O depending on configuration. |
| PB0–PB7 | Port B bidirectional I/O | Includes PB0/PB1 for timer/ADC alternate functions; PB3, PB5–PB7 support analog input on ST62T03C per Figure 1 block diagram. |
Key Features
| Feature | Design Value |
|---|---|
| Oscillator Safeguard (OSG) | Detects main clock failure and forces hardware reset within 4 clock cycles - prevents runaway code in safety-critical timing paths. |
| Low Voltage Detector (LVD) | Monitors VDD and asserts reset below programmable threshold (typically 2.7V or 3.8V) - avoids undefined CPU behavior during brownout. |
| Wait & Stop Power Modes | Reduces current to 1.2mA (Wait) or 2µA (Stop) at 5V - extends battery life in intermittently active sensor nodes or remote controls. |
| High-Sink I/O Outputs | PA1–PA3 deliver 20mA sink current each - eliminates need for discrete driver transistors when interfacing with indicators or small actuators. |
| Configurable Watchdog Timer | Independent timeout source with software-refreshable window; resets MCU if firmware hangs or misses refresh window - improves system reliability. |
Applications
| Automotive Body Control | Smart Appliance Interface |
|---|---|
Use Scenario: Controlling door lock actuators, interior lighting dimming, and window lift sequencing in 12V vehicle systems. IC Role / Device Role / Timing Role: Central timing and I/O coordinator; uses 8-bit timer for PWM dimming and watchdog for fail-safe lock retraction. Use Value: 20mA sink outputs drive solenoids directly; –40°C to +125°C rating ensures operation in engine bay proximity. |
Use Scenario: Managing user interface (buttons, LED indicators), temperature sensing, and motor control in washing machines. IC Role / Device Role / Timing Role: Main controller executing state machine logic; ADC reads thermistor voltage; timers manage spin cycle timing. Use Value: Integrated 4-channel ADC reduces BOM count; Wait mode lowers standby power during idle cycles. |
| Industrial Sensor Node | Heating System Thermostat |
Use Scenario: Battery-powered environmental monitor logging temperature/humidity via analog sensors and transmitting via UART. IC Role / Device Role / Timing Role: Data acquisition and protocol handler; ADC samples sensors; Stop mode preserves battery between 10-second readings. Use Value: 2µA Stop current enables >2-year battery life on CR2032; LVD prevents data corruption during voltage sag. |
Use Scenario: Closed-loop room temperature regulation using NTC thermistor feedback and relay-driven heating element. IC Role / Device Role / Timing Role: Analog front-end and decision engine; ADC converts thermistor voltage; watchdog guards against thermal runaway. Use Value: OSG ensures immediate reset if crystal fails during heating cycle - avoids uncontrolled overheating. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 8-bit microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ST62T00CM3/TR | Same 1KB OTP, 64B RAM, but lacks ADC and analog input capability. | Suitable only for purely digital control tasks (e.g., simple relay sequencers) without sensor feedback. | Select when analog acquisition is unnecessary and lowest BOM cost is prioritized. |
| ST62T25CB1 | 2KB ROM (not OTP), same peripherals except no LVD; packaged in PDIP16 instead of SO16. | Targeted at high-volume, fixed-function applications where field reprogramming is not required. | Choose for cost-sensitive, non-field-upgradable designs where through-hole assembly is preferred. |
Compared with ST62T03CM3/TR, ST62T00CM3/TR removes ADC functionality for pure digital control, while ST62T25CB1 trades OTP flexibility and LVD safety for lower unit cost and through-hole packaging - making the ST62T03CM3/TR optimal for analog-integrated, field-programmable, and automotive-grade applications.
Availability
ST62T03CM3/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 temperature ranges and long production lifecycles.
Supply support for ST62T03CM3/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 analog devices for industrial, automotive, and consumer markets.
The ST62xx family was engineered for cost-sensitive, mixed-signal embedded control - emphasizing robustness, low-power operation, and integration of essential peripherals (ADC, timers, watchdog) in minimal pin-count packages.
FAQ
Is ST62T03CM3/TR pin-compatible with ST62T00CM3/TR?
Yes - both share identical 16-pin SOIC package and pin mapping per ST's Doc ID 4563 Rev 5. However, ST62T00CM3/TR omits ADC functionality and related analog input pins (PB3, PB5–PB7), so PCBs designed for ST62T03CM3/TR retain full compatibility but may leave ADC pins unused when substituting the T00 variant.
What programming tools support ST62T03CM3/TR OTP programming?
STMicroelectronics' ST6 Toolset (ST6PROG software + ST6-PRG programmer hardware) supports OTP programming via VPP pin (Pin 1). Programming requires applying 12.5V to VPP while delivering serial programming data through PB0/PB1; full procedure is detailed in Section 3.2 of the datasheet.
Does ST62T03CM3/TR support in-circuit debugging?
No - it lacks dedicated debug interface (e.g., SWD, JTAG). Development relies on the erasable ST62E01C EPROM variant for prototyping, which shares identical pinout and firmware compatibility but allows repeated code rewrites before final OTP burn-in.
Can the internal watchdog timer be disabled after startup?
No - the watchdog timer is always enabled upon reset and cannot be disabled in hardware. It must be periodically refreshed by firmware; failure to do so within the timeout window triggers a hardware reset, ensuring fail-safe operation in deployed systems.
ST62T03CM3/TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- 16-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:
- 9
- Program Memory Size:
- 1KB (1K x 8)
- Program Memory Type:
- OTP
- EEPROM Size:
- -
- RAM Size:
- 64 x 8
- Voltage - Supply (Vcc/Vdd):
- 3V ~ 6V
- Data Converters:
- -
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
ST62T03CM3/TR FAQ
1.How can I place an order for ST62T03CM3/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for ST62T03CM3/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 ST62T03CM3/TR reliable?
The price and inventory of ST62T03CM3/TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ST62T03CM3/TR is usually 5 days.
3.What payment methods are accepted for ST62T03CM3/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ST62T03CM3/TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ST62T03CM3/TR?
ST62T03CM3/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ST62T03CM3/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 ST62T03CM3/TR?
For technical support, including ST62T03CM3/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ST62T03CM3/TR requirements.
6.How does Aetrix verify that ST62T03CM3/TR is sourced from the original manufacturer or authorized distributors?
All ST62T03CM3/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 ST62T03CM3/TR meets industry standards.
7.What is the process for return or replacement of ST62T03CM3/TR?
All ST62T03CM3/TR units undergo pre-shipment inspection (PSI). If there is an issue with ST62T03CM3/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 ST62T03CM3/TR part is unused and in its original packaging.
Return procedure for ST62T03CM3/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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