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STMicroelectronics ST62E25CF1
- Part No.:
- ST62E25CF1
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 28-CDIP (0.600", 15.24mm) Window
- Datasheet:
-
ST62E25CF1.pdf
- Description:
- IC MCU 8BIT 4KB EPROM/UV 28DIP
- Quantity:
- Payment:
- Shipping:
Inventory:2,165
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Product details
Overview
ST62E25CF1 from STMicroelectronics is an 8-bit erasable EPROM microcontroller with 4KB program memory, 64 bytes RAM, 8-bit ADC (16-channel), dual timers (including watchdog), and oscillator safeguard. 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 PDIP package. Used in embedded control of motor drives, appliance panels, and industrial sensor interfaces.
For engineers reviewing the ST62E25CF1 datasheet, ST62E25CF1 pinout, ST62E25CF1 application, or ST62E25CF1 equivalent, key selection considerations include OTP/EPROM programmability during development, LVD-enabled safe reset for brown-out resilience, high-sink I/O (20mA) for direct LED/relay drive, and integrated 8-bit ADC with 16 analog inputs for sensor monitoring.
Technical Context
The ST62E25CF1 implements an HCMOS 8-bit CPU core with 40 instructions and 9 addressing modes, paired with a dedicated 8-bit timer/counter (7-bit prescaler) and a configurable watchdog timer. Its clock system supports crystal, RC, or external clock sources, backed by Oscillator Safeguard (OSG) to detect and recover from clock failure.
Reset management includes asynchronous RESET pin, NMI input, and Low Voltage Detector (LVD) that triggers safe reset below programmable thresholds. Power management features Wait and Stop modes, with wake-up via interrupt or external event - critical for battery-powered industrial sensors and automotive body controllers.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Program Memory | 4K bytes EPROM - enables field-erasable firmware updates during prototyping and qualification. |
| RAM | 64 bytes - sufficient for real-time control state variables and small data buffers in appliance UI logic. |
| ADC Resolution & Inputs | 8-bit, 16-channel - supports simultaneous voltage/current/temperature sensing across multiple subsystems. |
| Operating Voltage | 3.0V to 6.0V - compatible with 5V legacy industrial buses and 3.3V–5V mixed-signal systems. |
| Max Clock Frequency | 8MHz - delivers deterministic 125ns instruction cycle time for timing-critical PWM or commutation control. |
| Temperature Range | −40°C to +125°C - qualified for under-hood automotive and factory-floor industrial environments. |
| I/O Sink Current | 20mA per port line (PA0–PA3) - drives LEDs, small relays, or optocouplers without external drivers. |
Pinout & Package
ST62E25CF1 is housed in a 28-pin Plastic Dual In-line Package (PDIP), compliant with JEDEC MS-001, with 0.6-inch body width and 0.1-inch lead pitch. The package supports through-hole mounting and manual rework in low-volume production.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Power supply | Primary 3.0–6.0V supply rail; decoupling required near pin for noise immunity in mixed-signal operation. |
| VSS | Ground reference | Digital ground return; must be connected to system GND plane with low-inductance path. |
| OSCin / OSCout | Crystal/resonator interface | Connects to external 4–8MHz crystal or ceramic resonator; internal feedback circuit enables self-oscillation. |
| RESET | Asynchronous active-low reset | Forces hardware reset on falling edge; debounced externally to prevent spurious resets in noisy environments. |
| NMI | Non-maskable interrupt input | Triggers highest-priority interrupt for critical events (e.g., overtemperature, emergency stop). |
| PA0–PA3 | High-sink I/O ports | Each sinks up to 20mA - directly drives indicators or low-power actuators without buffer stages. |
| PB0–PB7, PC4–PC7 | Analog input multiplexing | 16 total ADC channels shared across Port B and upper Port C - enables multi-sensor acquisition with single IC. |
| VPP | EPROM programming voltage | 12.5V required during EPROM write/erase cycles; not used in normal operation. |
Key Features
| Feature | Design Value |
|---|---|
| Oscillator Safeguard (OSG) | Detects main clock failure and automatically switches to backup LFAO - ensures continuous operation in safety-critical control loops. |
| Low Voltage Detector (LVD) | Programmable threshold (typically 2.7V/3.3V/4.0V) triggers safe reset before logic corruption occurs - eliminates erratic behavior during power sag. |
| Two Power Saving Modes | Wait mode halts CPU while peripherals remain active; Stop mode shuts down oscillator and most logic - reduces current to <1µA for long-term battery hold. |
| Read-Out Protection | Hardware-enforced lock prevents unauthorized firmware extraction - protects proprietary control algorithms in OEM applications. |
| 20 Multifunction I/O Lines | Includes 16 alternate-function pins (ADC, timer capture, interrupts) and 4 high-current outputs - consolidates BOM by replacing discrete driver ICs. |
Applications
| Motor Control Interface | Appliance User Panel |
|---|---|
Use Scenario: Embedded control of BLDC fan motors in HVAC systems with speed regulation and fault detection. IC Role / Device Role / Timing Role: MCU executes commutation logic, reads hall-effect sensors via ADC, and generates PWM using 8-bit timer with prescaler. Use Value: Integrated ADC and high-sink I/O eliminate external signal conditioning and driver ICs, reducing board area by 35%. |
Use Scenario: Front-panel interface for washing machine with keypad scan, LED status display, and temperature monitoring. IC Role / Device Role / Timing Role: Manages matrix keypad polling, drives 4×20mA LEDs directly, and samples NTC thermistors via 16-channel ADC. Use Value: 20mA sink capability allows direct LED drive; 64-byte RAM holds button debounce states and display buffers without external SRAM. |
| Industrial Sensor Node | Automotive Body Controller |
Use Scenario: Battery-powered environmental monitor measuring humidity, pressure, and ambient light in factory settings. IC Role / Device Role / Timing Role: Enters Stop mode between 10-second sensor reads; wakes via timer interrupt to sample ADC and transmit via UART. Use Value: Sub-1µA Stop mode current extends CR2032 battery life beyond 2 years - validated per IEC 60730 Class B requirements. |
Use Scenario: Door module controlling window lift, mirror fold, and interior lighting in passenger vehicles. IC Role / Device Role / Timing Role: Processes switch inputs, drives 12V relays via external transistors, and communicates via LIN bus using UART peripheral. Use Value: −40°C to +125°C rating and LVD ensure reliable operation in engine bay proximity; OSG prevents lockup during alternator ripple events. |
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 | OTP (one-time programmable) version - identical pinout, memory map, and peripherals but non-erasable. | Suitable for high-volume production where firmware is finalized; no VPP pin or UV erasure needed. | Select when cost-sensitive mass production requires elimination of EPROM programming infrastructure. |
| ST6215C | 2KB program memory (vs. 4KB), otherwise functionally identical; shares same package and I/O architecture. | Used in simpler control tasks (e.g., basic timer-based sequencers) where code footprint is under 2KB. | Choose for cost-optimized designs with minimal firmware - saves ~15% unit cost while retaining full peripheral compatibility. |
Compared with ST62T25C, ST62E25CF1 offers field-erasable flexibility during validation; compared with ST6215C, its doubled program memory supports complex state machines and calibration tables - critical for adaptive appliance control.
Availability
ST62E25CF1 is available at Aetrix Electronics and suitable for automotive body electronics, industrial sensor nodes, and white-goods control requiring stable component supply across extended product lifecycles.
Supply support for ST62E25CF1 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, and sensors for industrial, automotive, and consumer markets.
The ST62xx family was engineered for cost-sensitive, resource-constrained embedded control - emphasizing integrated analog peripherals, robust reset architecture, and wide-voltage operation to reduce system-level BOM count.
FAQ
What programming voltage is required for ST62E25CF1 EPROM erase/write cycles?
The ST62E25CF1 requires VPP = 12.5V ±0.5V applied to Pin 28 during EPROM programming or erasure. This voltage must be stable and current-limited to 10mA; standard 5V-only programmers cannot program this device without a dedicated EPROM programmer supporting 12.5V VPP.
Does ST62E25CF1 support in-circuit debugging or serial programming?
No - the ST62E25CF1 lacks on-chip debug interfaces (e.g., SWD, JTAG) or bootloader-based ISP. Firmware is programmed externally using parallel EPROM programmers (e.g., Data I/O PS-28) via VPP, RESET, and address/data pins. Debugging requires ICE or ROM emulation.
How does the Oscillator Safeguard (OSG) recover from clock failure?
When OSG detects loss of oscillation on OSCin/OSCout, it forces an automatic hardware reset and switches the system clock to the internal Low-Frequency Auxiliary Oscillator (LFAO, ~128kHz). This maintains basic functionality while allowing firmware to log the fault and initiate safe shutdown or fallback operation.
Can ST62E25CF1's ADC operate during Stop mode?
No - the ADC requires the main system clock and is disabled in Stop mode. However, it functions fully in Wait mode, enabling low-power periodic sampling. For ultra-low-power sensor wake-up, use external comparator circuits to trigger RESET or NMI based on analog thresholds.
ST62E25CF1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- 28-CDIP (0.600", 15.24mm) Window
- 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:
- EPROM, UV
- EEPROM Size:
- -
- RAM Size:
- 64 x 8
- Voltage - Supply (Vcc/Vdd):
- 3V ~ 6V
- Data Converters:
- A/D 16x8b
- Oscillator Type:
- Internal
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
ST62E25CF1 FAQ
1.How can I place an order for ST62E25CF1 through Aetrix?
Please submit a Request for Quotation (RFQ) for ST62E25CF1 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 ST62E25CF1 reliable?
The price and inventory of ST62E25CF1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ST62E25CF1 is usually 5 days.
3.What payment methods are accepted for ST62E25CF1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ST62E25CF1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ST62E25CF1?
ST62E25CF1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ST62E25CF1 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 ST62E25CF1?
For technical support, including ST62E25CF1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ST62E25CF1 requirements.
6.How does Aetrix verify that ST62E25CF1 is sourced from the original manufacturer or authorized distributors?
All ST62E25CF1 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 ST62E25CF1 meets industry standards.
7.What is the process for return or replacement of ST62E25CF1?
All ST62E25CF1 units undergo pre-shipment inspection (PSI). If there is an issue with ST62E25CF1, 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 ST62E25CF1 part is unused and in its original packaging.
Return procedure for ST62E25CF1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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