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STMicroelectronics ST7FLITEUS5U6/TR
- Part No.:
- ST7FLITEUS5U6/TR
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 8-VDFN Exposed Pad
- Datasheet:
-
ST7FLITEUS5U6/TR.pdf
- Description:
- IC MCU 8BIT 1KB FLASH 8DFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,144
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Product details
Overview
ST7FLITEUS5U6/TR from STMicroelectronics is an 8-bit Flash microcontroller featuring 1 Kbyte single-voltage Flash program memory (10K write/erase cycles, 20-year data retention at 55 °C), 128 bytes RAM, integrated 10-bit ADC with 5 input channels, dual timers (8-bit Lite timer with watchdog and 12-bit auto-reload timer with PWM), and five low-power operating modes. It operates across 2.4–3.3 V at up to 4 MHz or 3.3–5.5 V at up to 8 MHz, targeting battery-powered sensor nodes and simple industrial control interfaces.
For engineers reviewing the ST7FLITEUS5U6/TR datasheet, ST7FLITEUS5U6/TR pinout, ST7FLITEUS5U6/TR application, or ST7FLITEUS5U6/TR equivalent, key selection criteria include its single-supply Flash architecture, internal trimmable 8 MHz RC oscillator, 3-level low-voltage supervisor, high-sink I/O capability (5 lines), and support for in-application programming (IAP) and in-circuit programming (ICP).
Technical Context
This MCU implements the ST7 core with 63 basic instructions, 17 addressing modes, and illegal opcode detection. Its clock system integrates an internal trimmable 8 MHz RC oscillator, a low-frequency RC source, and external clock input, managed via MCCSR and RCCR registers.
Interrupt handling supports 11 vectors plus TRAP and RESET, with five dedicated external interrupt lines mapped to separate I/O pins. The system integrity unit provides independent LVD and AVD monitoring, enabling safe power-on/off sequencing and brown-out recovery without external components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | 8-bit ST7 CPU with 63 instructions and 17 addressing modes - enables compact firmware and deterministic real-time response. |
| Flash Memory | 1 Kbyte single-voltage Flash with readout protection, ICP, and IAP - supports field firmware updates and secure code storage. |
| RAM Size | 128 bytes (64-byte stack space) - sufficient for small state machines and sensor data buffering in ultra-low-cost designs. |
| ADC Resolution | 10-bit SAR ADC with 5 input channels, 0–VDD range - delivers ±1 LSB INL for analog sensing without external reference. |
| CPU Frequency | Up to 8 MHz (at 3.3–5.5 V) or 4 MHz (at 2.4–3.3 V) - balances performance and power in mixed-signal embedded applications. |
| Operating Temp | –40 to +85 °C - qualified for industrial ambient environments without derating. |
| Supply Voltage | 2.4–3.3 V or 3.3–5.5 V - dual-range operation simplifies design across battery and line-powered systems. |
Pinout & Package
ST7FLITEUS5U6/TR is housed in an SO8 150 mil package (8-pin small outline integrated circuit), compliant with JEDEC MS-012AC. Pin functions are validated per ST's official pin description table (Document RM0019, Section 2).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Power supply | Primary positive supply rail (2.4–5.5 V); decoupling required within 10 mm of pin. |
| VSS | Ground | Digital ground reference; must be connected directly to PCB ground plane. |
| PA0–PA4 | Multi-function I/O | 5 bidirectional lines supporting input capture, external interrupts, and high-sink output (20 mA max). |
| PA5 | Dedicated output | Additional general-purpose output line without input or alternate function capability. |
| PA6–PA7 | Alternate function I/O | 2 pins configurable as timer outputs, ADC triggers, or system clock inputs. |
| RESET | Active-low reset | Asynchronous reset input; internally pulled up; accepts 1.2 V logic threshold. |
| CLK | External clock input | Accepts external crystal (up to 8 MHz) or CMOS clock signal; overrides internal RC oscillator. |
Key Features
| Feature | Design Value |
|---|---|
| Low-voltage supervisor | 3-level LVD with programmable thresholds ensures reliable reset assertion during brown-out conditions down to 2.1 V. |
| Power saving modes | Five modes (Halt, Auto-wakeup Halt, Active-halt, Wait, Slow) reduce active current to <1 μA in Halt mode with RTC wake-up. |
| Timer subsystem | Lite Timer (LT) provides watchdog, real-time base, and input capture; AT timer delivers PWM with 12-bit resolution and auto-reload. |
| I/O drive strength | Five high-sink outputs rated for 20 mA each - drive LEDs, relays, or logic inputs directly without external buffers. |
| Development support | Full hardware/software toolchain including STVP programmer, ST7 Starter Kit, and ICP/IAP compatibility simplifies prototyping and production programming. |
Applications
| Smart Sensor Node | Industrial Control Interface |
|---|---|
Use Scenario: Battery-powered temperature/humidity sensor transmitting data via UART or RF link every 30 seconds. IC Role / Device Role / Timing Role: Central controller managing ADC sampling, sleep/wake scheduling, and serial communication timing. Use Value: Ultra-low Halt-mode current (<1 μA) extends 2×AA battery life beyond 2 years; internal RC oscillator eliminates external crystal cost. |
Use Scenario: DIN-rail mounted I/O module converting 4–20 mA analog inputs to digital status signals for PLC monitoring. IC Role / Device Role / Timing Role: Signal conditioner and protocol translator interfacing analog sensors to Modbus RTU over RS-485. Use Value: 5 high-sink I/O lines directly drive optocouplers; 10-bit ADC achieves 0.1% full-scale accuracy over industrial temperature range. |
| Consumer Appliance Timer | Medical Diagnostic Peripheral |
Use Scenario: Microwave oven control panel with keypad scan, display driver, and safety interlock monitoring. IC Role / Device Role / Timing Role: Real-time task scheduler coordinating user input, display refresh, and door switch validation. Use Value: Dual-timer architecture separates watchdog (LT) and cooking time countdown (AT), preventing single-point failure. |
Use Scenario: Portable blood glucose meter requiring precise analog front-end control and low-power LCD driving. IC Role / Device Role / Timing Role: Mixed-signal controller managing photodiode signal acquisition, calibration offset correction, and segmented LCD bias generation. Use Value: Integrated AVD monitors battery voltage to trigger low-battery warning before critical discharge; 128-byte RAM holds calibration coefficients and last-measurement history. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 8-bit Flash microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STM8S003F3P6 | Enhanced ST8 core, 8 Kbyte Flash, 1 Kbyte RAM, higher clock (16 MHz), no LVD/AVD combo | Requires external voltage monitor for brown-out protection; better suited for compute-intensive tasks | Select when >1 Kbyte Flash or >128 bytes RAM is needed; verify LVD replacement circuitry. |
| PIC12F675-I/P | 8-bit PIC core, 1.75 Kbyte Flash, 64 bytes RAM, 10-bit ADC (4 ch), no auto-reload timer or IAP | Lacks PWM and in-application programming; limited interrupt vector count (4) | Choose for cost-sensitive, non-upgradable designs where AT timer and IAP are unnecessary. |
Compared with STM8S003F3P6 and PIC12F675-I/P, ST7FLITEUS5U6/TR uniquely combines IAP, dual-timer PWM, and integrated LVD/AVD in an SO8 package-making it optimal for field-serviceable, safety-aware, low-pin-count applications where firmware updates and supply monitoring are mandatory.
Availability
ST7FLITEUS5U6/TR is available at Aetrix Electronics and suitable for smart sensor nodes, industrial control interfaces, consumer appliance timers, and medical diagnostic peripherals requiring stable component supply and long-term obsolescence management.
Supply support for ST7FLITEUS5U6/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 automotive semiconductors since 1987.
The ST7 family was engineered for cost-sensitive, ultra-low-power 8-bit control applications in industrial, appliance, and sensor markets-emphasizing single-supply Flash, integrated analog peripherals, and robust power management.
FAQ
Is ST7FLITEUS5U6/TR still in active production?
No-ST7FLITEUS5U6/TR is marked as obsolete by STMicroelectronics (per document RM0019 Rev 5, February 2009). However, Aetrix Electronics maintains legacy inventory with full traceability and offers lifecycle support including cross-reference guidance and last-time-buy planning for ongoing production programs.
What development tools are compatible with ST7FLITEUS5U6/TR?
ST's official STVP (ST Visual Programmer) software and ST-LINK-compatible debuggers support ICP and IAP. Hardware tools include the ST7 Starter Kit (part number ST7SK) and third-party programmers like the Raisonance RLink. All leverage the standard SWIM (Single Wire Interface Module) debug interface.
Can the internal RC oscillator be calibrated for improved accuracy?
Yes-the internal 8 MHz RC oscillator includes factory-trimmed calibration values stored in option bytes, and users can perform fine-tuning via the RCCR register. Typical accuracy after calibration is ±1% over –40 to +85 °C, sufficient for UART baud rate generation without external crystal.
Does ST7FLITEUS5U6/TR support EEPROM emulation in Flash?
Yes-its Flash memory supports in-application programming (IAP), and ST provides application note AN2601 detailing EEPROM emulation techniques using wear-leveling across multiple Flash pages. This enables non-volatile parameter storage with 10K endurance and 20-year retention.
ST7FLITEUS5U6/TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- 8-VDFN Exposed Pad
- Series:
- ST7
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Core Processor:
- ST7
- Core Size:
- 8-Bit
- Speed:
- 8MHz
- Connectivity:
- -
- Peripherals:
- LVD, POR, PWM, WDT
- Number of I/O:
- 5
- Program Memory Size:
- 1KB (1K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- -
- RAM Size:
- 128 x 8
- Voltage - Supply (Vcc/Vdd):
- 2.4V ~ 5.5V
- Data Converters:
- A/D 5x10b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
ST7FLITEUS5U6/TR FAQ
1.How can I place an order for ST7FLITEUS5U6/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for ST7FLITEUS5U6/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 ST7FLITEUS5U6/TR reliable?
The price and inventory of ST7FLITEUS5U6/TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ST7FLITEUS5U6/TR is usually 5 days.
3.What payment methods are accepted for ST7FLITEUS5U6/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ST7FLITEUS5U6/TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ST7FLITEUS5U6/TR?
ST7FLITEUS5U6/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ST7FLITEUS5U6/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 ST7FLITEUS5U6/TR?
For technical support, including ST7FLITEUS5U6/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ST7FLITEUS5U6/TR requirements.
6.How does Aetrix verify that ST7FLITEUS5U6/TR is sourced from the original manufacturer or authorized distributors?
All ST7FLITEUS5U6/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 ST7FLITEUS5U6/TR meets industry standards.
7.What is the process for return or replacement of ST7FLITEUS5U6/TR?
All ST7FLITEUS5U6/TR units undergo pre-shipment inspection (PSI). If there is an issue with ST7FLITEUS5U6/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 ST7FLITEUS5U6/TR part is unused and in its original packaging.
Return procedure for ST7FLITEUS5U6/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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