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STMicroelectronics ST62T20CM6
- Part No.:
- ST62T20CM6
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
ST62T20CM6.pdf
- Description:
- IC MCU 8BIT 4KB OTP 20SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,494
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Product details
Overview
ST62T20CM6 from STMicroelectronics is an 8-bit OTP microcontroller with 4KB program memory, 64 bytes RAM, integrated 8-bit ADC (8-channel), dual timers (including watchdog), oscillator safeguard, and low-voltage detector. It operates from 3.0V to 6.0V, supports crystal/RC/LFAO clock sources, and targets embedded control in automotive body electronics, appliance motor control, and industrial sensor interfaces.
For engineers reviewing the ST62T20CM6 datasheet, ST62T20CM6 pinout, ST62T20CM6 application, or ST62T20CM6 equivalent, key selection criteria include its 4KB OTP capacity, 8-channel ADC resolution and sampling rate, 20mA high-sink I/O capability, OSG-enabled clock fault detection, and LVD-triggered safe reset behavior under brownout conditions.
Technical Context
The ST62T20CM6 implements a Harvard-architecture 8-bit CPU core with 40 instructions and 9 addressing modes. Its on-chip peripherals include an 8-bit timer/counter with 7-bit prescaler, a configurable watchdog timer, and an 8-bit successive-approximation ADC with up to 8 analog inputs and internal reference.
Power management integrates two low-power modes (Wait and Stop), enhanced reset logic with LVD threshold at 2.5V ±0.2V, and Oscillator Safeguard (OSG) that forces reset if main clock fails while LFAO remains active. All I/O pins support digital input/output, with four capable of 20mA sink current for direct LED or relay drive.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | 8-bit Harvard CPU with 40 instructions and 9 addressing modes - enables compact firmware and deterministic interrupt latency. |
| Program Memory | 4KB One-Time-Programmable (OTP) - supports field-deployed firmware without erasure requirement; read-out protection enabled. |
| RAM Size | 64 bytes data RAM - sufficient for small state machines and sensor data buffering in cost-sensitive control loops. |
| ADC Resolution | 8-bit SAR ADC with 8 input channels - delivers 256-level quantization for thermistor, potentiometer, or battery voltage monitoring. |
| Operating Voltage | 3.0V to 6.0V supply range - compatible with 5V legacy systems and tolerant of automotive battery transients. |
| Max Clock Frequency | 8MHz system clock - supports real-time response within ~125ns instruction cycle for time-critical I/O handling. |
| Temperature Range | −40°C to +125°C - qualified for under-hood automotive and industrial environments without derating. |
Pinout & Package
ST62T20CM6 is housed in a 20-pin plastic dual in-line package (PDIP20) with 0.3-inch body width and 2.54mm pitch. Pin functions are validated per STMicroelectronics datasheet Rev 4 (Jan 2009), Section 2 "Pin Description".
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Power Supply | Main 3.0–6.0V supply rail; decoupling capacitor required at pin for noise immunity. |
| VSS | GND Reference | Digital ground return path; must be low-impedance and separated from analog ground if ADC used. |
| OSCIN / OSCOUT | Crystal Oscillator Interface | Connects to external crystal or ceramic resonator (1–8MHz); internal feedback amplifier provided. |
| LFAO | Low-Frequency Auxiliary Oscillator Input | Accepts 32.768kHz watch crystal for RTC backup or low-power wake-up timing. |
| RESET | Active-Low Asynchronous Reset | Hardware reset input; internally pulled up; triggers full initialization on falling edge. |
| NMI | Non-Maskable Interrupt | Edge-triggered emergency interrupt; used for critical fault signaling (e.g., overtemperature). |
| PA0–PA3 | Port A I/O Lines | Bidirectional with 20mA sink capability - directly drives LEDs, small solenoids, or optocouplers. |
| PB0–PB7 | Port B I/O Lines | General-purpose I/O; PB0–PB3 also serve as ADC input channels AN0–AN3. |
| VPP | Programming Voltage | 12.5V input during OTP programming; not used in normal operation. |
Key Features
| Feature | Design Value |
|---|---|
| Oscillator Safeguard (OSG) | Detects main oscillator failure and automatically switches to LFAO while asserting reset - prevents runaway code execution. |
| Low Voltage Detector (LVD) | Monitors VDD and triggers safe reset at 2.5V ±0.2V - ensures reliable shutdown before logic corruption occurs. |
| High-Sink I/O Ports | Four pins (PA0–PA3) deliver 20mA sink current without external drivers - reduces BOM count in discrete actuator interfaces. |
| Two Power-Saving Modes | Wait mode halts CPU but retains RAM/peripherals; Stop mode disables all clocks except LFAO - extends battery life in portable sensors. |
| ADC Input Flexibility | 8-channel multiplexer with software-selectable acquisition time - supports simultaneous sampling of multiple analog sensors with minimal firmware overhead. |
Applications
| Automotive Body Control | Appliance Motor 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-machine logic, reading switch inputs, driving relays/LEDs via high-sink I/O, and monitoring battery voltage via ADC. Use Value: Integrated OSG and LVD ensure fail-safe behavior during alternator dropout or EMI-induced clock faults - meets ISO 16750-2 transient requirements. |
Use Scenario: Speed and direction control of universal motors in washing machines and vacuum cleaners. IC Role / Device Role / Timing Role: Generates PWM signals using timer outputs, reads zero-crossing detection and thermal feedback, and adjusts duty cycle based on load ADC readings. Use Value: 8-channel ADC enables concurrent monitoring of motor current, temperature, and line voltage - improves energy efficiency and stall protection. |
| Industrial Sensor Node | Smart HVAC Actuator |
Use Scenario: Battery-powered environmental monitor measuring temperature, humidity, and CO₂ via analog sensor outputs. IC Role / Device Role / Timing Role: Low-power controller waking periodically via LFAO, sampling sensors through ADC, processing data, and transmitting via UART or discrete output. Use Value: Stop mode current <1μA allows multi-year operation on coin-cell batteries - eliminates need for external power management ICs. |
Use Scenario: Position control of damper actuators in commercial HVAC duct systems. IC Role / Device Role / Timing Role: Reads potentiometer feedback via ADC, compares against target position, and drives H-bridge enable lines using PA0–PA3 high-sink outputs. Use Value: 20mA sink capability directly drives logic-level MOSFET gates - removes gate driver stage and simplifies PCB layout. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 8-bit microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ST62T25CM6 | Same ST62T family; 8KB OTP, 128B RAM, identical peripherals and pinout. | Supports larger firmware images and deeper data buffers - suitable when code growth exceeds 4KB. | Select if future firmware expansion is anticipated; otherwise, ST62T20CM6 offers optimal cost/performance balance. |
| STM8S003F3P6 | 32MHz STM8 core, 8KB Flash, 1KB RAM, 10-bit ADC, enhanced debug interface. | Higher performance, modern toolchain support, and longer product lifecycle - but requires PCB redesign due to different pinout and voltage range (2.95–5.5V). | Choose for new designs requiring scalability, USB compatibility, or long-term availability beyond ST62's obsolete status. |
Compared with ST62T25CM6, the ST62T20CM6 trades memory headroom for lower unit cost and smaller footprint; versus STM8S003F3P6, it offers proven reliability in legacy automotive systems but lacks Flash reprogrammability and advanced peripherals.
Availability
ST62T20CM6 is available at Aetrix Electronics and suitable for automotive body electronics, appliance motor control, and industrial sensor node applications requiring stable component supply across extended production lifecycles.
Supply support for ST62T20CM6 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 industrial, automotive, and consumer markets.
The ST62xx family was engineered for cost-sensitive, high-reliability embedded control - emphasizing robust clock supervision, safe reset architecture, and integrated analog peripherals to minimize external components in 8-bit applications.
FAQ
Is ST62T20CM6 still in active production?
No - ST62T20CM6 is an obsolete device per STMicroelectronics' official product change notification (PCN). However, Aetrix Electronics maintains legacy inventory and offers controlled-life supply with full traceability, including date-code matching and extended warranty for existing production programs.
What programming voltage is required for OTP programming?
ST62T20CM6 requires 12.5V applied to the VPP pin during OTP programming, as specified in Section 3.2.1 of the datasheet. This voltage must be stable and current-limited to 10mA; standard 5V-only programmers cannot program this device without dedicated high-voltage circuitry.
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 external interrupt or LFAO timeout, then initiate ADC conversion in Run mode. The ADC is functional in Wait mode if the peripheral clock remains enabled.
Does ST62T20CM6 support in-circuit debugging?
No - ST62T20CM6 lacks on-chip debug hardware (e.g., SWIM or UART bootloader). Development relies on parallel programming with ST's ST62xx EPROM emulator (ST62E20C) or OTP programmers such as Data I/O PS-3000, with full verification performed post-programming.
ST62T20CM6 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- 20-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:
- 12
- 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 8x8b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
ST62T20CM6 FAQ
1.How can I place an order for ST62T20CM6 through Aetrix?
Please submit a Request for Quotation (RFQ) for ST62T20CM6 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 ST62T20CM6 reliable?
The price and inventory of ST62T20CM6 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ST62T20CM6 is usually 5 days.
3.What payment methods are accepted for ST62T20CM6?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ST62T20CM6 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ST62T20CM6?
ST62T20CM6 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ST62T20CM6 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 ST62T20CM6?
For technical support, including ST62T20CM6 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ST62T20CM6 requirements.
6.How does Aetrix verify that ST62T20CM6 is sourced from the original manufacturer or authorized distributors?
All ST62T20CM6 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 ST62T20CM6 meets industry standards.
7.What is the process for return or replacement of ST62T20CM6?
All ST62T20CM6 units undergo pre-shipment inspection (PSI). If there is an issue with ST62T20CM6, 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 ST62T20CM6 part is unused and in its original packaging.
Return procedure for ST62T20CM6:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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