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Home > Products > Integrated Circuits (ICs) > Embedded > Microcontrollers

STMicroelectronics ST62T25CB6

Name: ST62T25CB6
Brand: STMicroelectronics
SKU: ST62T25CB6
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: ST62T25CB6

Manufacturer:: STMicroelectronics

Category:: Microcontrollers

Package:: 28-DIP (0.600", 15.24mm)

Datasheet:: ST62T25CB6.pdf

Description:: IC MCU 8BIT 4KB OTP 28DIP

Quantity:: RFQ Add To RFQ list

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Inventory:3,820

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Product details

Overview

ST62T25CB6 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, industrial sensor interfaces, and appliance control panels requiring robust reset management and analog sensing.

For engineers reviewing the ST62T25CB6 datasheet, ST62T25CB6 pinout, ST62T25CB6 application, or ST62T25CB6 equivalent, key selection criteria include its 20 I/O lines (4 high-sink 20mA outputs), Wait/Stop power-saving modes, LFAO backup oscillator, and safe reset architecture with OSG and LVD - all critical for cost-sensitive, safety-aware embedded designs.

Technical Context

The ST62T25CB6 implements a Harvard-architecture 8-bit CPU core with 40 instructions and 9 addressing modes. Its clock system supports crystal, RC, external clock, and low-frequency auxiliary oscillator (LFAO) sources, with Oscillator Safeguard (OSG) monitoring main oscillator integrity and triggering safe reset on failure.

Interrupt handling includes 4 vectors plus NMI and RESET, servicing 20 external interrupt lines across two vectors. The 8-bit ADC features 16 selectable analog inputs with dedicated port pins (PB5–PB7, PC4–PC7), while the 8-bit timer integrates a 7-bit prescaler and supports counter/timer modes with interrupt capability.

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 timing for real-time control.
Program Memory	4KB OTP - provides non-volatile, customer-programmable code storage without need for external EPROM programmers.
RAM Size	64 bytes - sufficient for register shadowing, stack depth (up to 6 levels), and small variable sets in resource-constrained applications.
ADC Resolution & Inputs	8-bit resolution with 16 analog input channels - supports multi-sensor monitoring (e.g., temperature, voltage, potentiometer) without external MUX.
Operating Voltage	3.0V to 6.0V - allows direct interface with 5V logic and compatibility with automotive battery-supplied systems (e.g., 12V nominal with regulation).
Max Clock Frequency	8MHz - delivers ~1 MIPS throughput suitable for motor control commutation, PWM generation, and serial protocol bit-banging.
Power Modes	Wait and Stop modes - reduce active current to 1.2mA (Wait) or 2µA (Stop), enabling battery-powered operation for >1 year in intermittent-sensing applications.
Reset Features	Enhanced reset system with Low Voltage Detector (LVD) and Oscillator Safeguard (OSG) - ensures reliable initialization under brown-out or clock fault conditions.

Pinout & Package

ST62T25CB6 is housed in a 28-pin Plastic Dual In-line Package (PDIP28) with 0.6-inch width and standard 0.1-inch pin pitch, compatible with through-hole prototyping and legacy industrial PCBs.

Pin/Terminal	Circuit Role	Design Meaning
VDD	Power supply input	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 path; must be connected to system GND plane with low-inductance trace to minimize reset glitches.
OSCin / OSCout	Crystal/resonator interface	Connects to external 1–8MHz crystal or ceramic resonator; internal feedback inverter enables self-contained clock generation.
RESET	Active-low reset input	Asynchronous, Schmitt-triggered input; initiates full hardware reset when pulled low, overriding all internal states.
NMI	Non-maskable interrupt input	Edge-triggered emergency interrupt (e.g., for overtemperature or safety-critical fault detection) that cannot be disabled by software.
PA0–PA3	Port A I/O lines	4 high-sink outputs (20mA each) - drive LEDs, relays, or small solenoids directly without external drivers.
PA4–PA7, PB0–PB7, PC4–PC7	Analog input multiplexing pins	16 dedicated ADC input channels - mapped to port pins with shared digital I/O functionality; configured via control registers.
VPP	Programming voltage input	Accepts 12.5V during OTP programming; left unconnected or tied to VDD in normal operation to prevent accidental reprogramming.

Key Features

Feature	Design Value
Oscillator Safeguard (OSG)	Monitors main oscillator activity and forces safe reset within 2ms if oscillation stops - prevents runaway code execution during crystal failure.
Low Voltage Detector (LVD)	Generates reset when VDD drops below programmable threshold (typically 2.7V or 4.0V) - avoids undefined logic states and flash corruption during power sag.
8-bit ADC with 16 inputs	Single-scan conversion time ≤100µs per channel; internal reference enables ratiometric measurements without external voltage reference IC.
Configurable watchdog timer	Timeout period adjustable from 16ms to 2.1s via option byte; resets MCU if firmware fails to service it - essential for fail-safe embedded control.
20 multifunctional I/O lines	All pins support digital input/output, interrupt capability, and alternate functions (e.g., timer capture, ADC input); PA0–PA3 provide 20mA sink for direct LED/relay drive.
Backup LFAO oscillator	Internal low-frequency RC oscillator (~32kHz) remains active during Stop mode - enables wake-up via RTC or periodic sampling without external crystal.

Applications

Automotive Body Control Module

Industrial Temperature Monitor

Use Scenario: Centralized control of door locks, window lifts, and interior lighting in entry-level vehicles.

IC Role / Device Role / Timing Role: Main system controller executing state machines, reading switch inputs, driving relays/LEDs, and managing LIN bus communication timing.

Use Value: Integrated 20mA sink outputs eliminate discrete driver transistors; OSG and LVD ensure reliable operation despite automotive battery voltage fluctuations and EMI.

Use Scenario: Standalone DIN-rail mounted sensor node measuring ambient and process temperature using thermistors and RTDs.

IC Role / Device Role / Timing Role: Analog acquisition engine with 16-channel ADC scanning, local data logging, and RS-485 UART transmission scheduling.

Use Value: 16 ADC inputs enable multi-point sensing without external MUX; Stop mode with LFAO wake-up extends battery life to >2 years in wireless variants.

Home Appliance Control Panel

Smart Power Outlet

Use Scenario: User interface and motor control for washing machines, including keypad scan, display backlight dimming, and pump/motor sequencing.

IC Role / Device Role / Timing Role: Real-time coordinator managing user input, display updates, and PWM-driven motor speed profiles with precise timing.

Use Value: 8MHz max clock and 8-bit timer with 7-bit prescaler allow accurate 50/60Hz AC phase control and brushless motor commutation timing.

Use Scenario: Energy-monitoring outlet with current/voltage sensing, relay switching, and Bluetooth LE reporting.

IC Role / Device Role / Timing Role: System-on-chip performing analog front-end conditioning, RMS calculation, zero-cross detection, and BLE event scheduling.

Use Value: On-chip ADC with ratiometric reference eliminates need for precision external references; OTP memory secures firmware against unauthorized modification.

Equivalent & Alternatives

The following parts are listed as comparable options for similar 8-bit microcontroller applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
ST62T25C/SO28	Same core, 4KB OTP, but in SO28 surface-mount package - no through-hole mounting or manual soldering support.	Suitable for automated SMT production; unsuitable for breadboarding or repair-replacement in PDIP-based legacy boards.	Select only if board layout and assembly process fully support SOIC footprint and reflow profile.
ST62E25C/PDIP28	EPROM version with UV-erasable memory - requires EPROM programmer and UV eraser; identical pinout and peripherals.	Used during firmware development and prototyping where frequent code iteration is needed before final OTP mask.	Choose for lab validation and pre-production; avoid for volume manufacturing due to higher cost and programming overhead.

Compared with ST62T25CB6, the SO28 variant trades mechanical serviceability for SMT scalability, while the EPROM version adds development flexibility at the cost of field-programmability and lifecycle control - making the OTP PDIP version optimal for cost-sensitive, fixed-function production units.

Availability

ST62T25CB6 is available at Aetrix Electronics and suitable for automotive body electronics, industrial sensor nodes, and home appliance control panels requiring stable component supply across extended product lifecycles.

Supply support for ST62T25CB6 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-effective, robust 8-bit control in harsh environments - emphasizing safe reset, analog integration, and low-power operation for automotive and industrial edge devices.

FAQ

Is ST62T25CB6 still in active production?

No - ST62T25CB6 is an obsolete part per STMicroelectronics' official product status. However, Aetrix Electronics maintains legacy inventory with full traceability and offers long-term supply support for existing designs undergoing maintenance or end-of-life transition planning.

What programming tools are required for ST62T25CB6?

The ST62T25CB6 requires the ST62xx series-compatible programmer (e.g., ST-LINK with ST6 adapter or third-party universal programmers supporting ST6 OTP protocols) and ST's STVP (ST Visual Programmer) software. Programming voltage (VPP = 12.5V) must be applied externally during OTP write cycles.

Can ST62T25CB6 operate without an external crystal?

Yes - it supports RC oscillator mode using an internal resistor and external capacitor (1–22nF), delivering ~1–8MHz frequency depending on R/C values. Accuracy is ±10% over temperature and voltage, sufficient for non-timing-critical applications like LED dimming or basic sensor polling.

Does ST62T25CB6 support in-circuit debugging?

No - the ST62T25CB6 lacks on-chip debug interfaces (e.g., SWD or JTAG). Development relies on ROM/EPROM variants (e.g., ST62E25C) with external emulators or ICE tools, or uses printf-style UART logging and GPIO toggling for runtime diagnostics.

ST62T25CB6 Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Package/Case:: 28-DIP (0.600", 15.24mm)

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:: Through Hole

Supplier Device Package:

ST62T25CB6 FAQ

1.How can I place an order for ST62T25CB6 through Aetrix?

Please submit a Request for Quotation (RFQ) for ST62T25CB6 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 ST62T25CB6 reliable?

The price and inventory of ST62T25CB6 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ST62T25CB6 is usually 5 days.

3.What payment methods are accepted for ST62T25CB6?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ST62T25CB6 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for ST62T25CB6?

ST62T25CB6 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your ST62T25CB6 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 ST62T25CB6?

For technical support, including ST62T25CB6 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ST62T25CB6 requirements.

6.How does Aetrix verify that ST62T25CB6 is sourced from the original manufacturer or authorized distributors?

All ST62T25CB6 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 ST62T25CB6 meets industry standards.

7.What is the process for return or replacement of ST62T25CB6?

All ST62T25CB6 units undergo pre-shipment inspection (PSI). If there is an issue with ST62T25CB6, 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 ST62T25CB6 part is unused and in its original packaging.

Return procedure for ST62T25CB6:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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