My Inquiry
My Account
STMicroelectronics STR912FW44X6
- Part No.:
- STR912FW44X6
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 128-LQFP
- Datasheet:
-
STR912FW44X6.pdf
- Description:
- IC MCU 32BIT 512KB FLASH 128LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:3,896
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
STR912FW44X6 from STMicroelectronics is a 16/32-bit ARM966E-S-based microcontroller with dual-bank Flash (512KB + 32KB), 96KB SRAM, 10/100 Ethernet MAC, USB Full-Speed slave, CAN 2.0B, and 3-phase induction motor control. It operates at up to 96 MHz, delivers 96 MIPS from Flash, and supports real-time applications in industrial gateways and motor drives.
For engineers reviewing the STR912FW44X6 datasheet, STR912FW44X6 pinout, STR912FW44X6 application, or STR912FW44X6 equivalent, key selection considerations include its LQFP128 package, 80 I/O pins (5 V tolerant), integrated ETM9 trace module, and dual-voltage operation (1.8 V core / 2.7–3.6 V I/O).
Technical Context
The STR912FW44X6 implements the ARM966E-S core with Harvard architecture, 5-stage pipeline, and Tightly-Coupled Memories - enabling simultaneous instruction fetch and data access. Its burst Flash interface includes a 4-entry branch cache and 4-instruction prefetch queue, reducing interrupt latency and eliminating instruction cache indeterminism.
It integrates dedicated hardware accelerators: a 3-phase IMC with dead-time generation and emergency stop, 8-channel 10-bit ADC (0.7 µs conversion), and programmable DMA (9 channels, including Ethernet-dedicated). Clock management includes internal PLL (up to 96 MHz), RTC with tamper detection, and three power modes (Run/Idle/Sleep) down to 50 µA.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | ARM966E-S RISC, Harvard architecture, 5-stage pipeline, binary-compatible with ARM7/Thumb code |
| Max Clock Speed | 96 MHz - enables deterministic 96 MIPS execution directly from Flash without external SDRAM or instruction cache |
| Memory | 512KB main Flash + 32KB secondary Flash + 96KB SRAM (battery-backup optional) - supports code/data separation and firmware redundancy |
| Peripherals | 10/100 Ethernet MAC with DMA, USB 2.0 Full-Speed slave (12 Mbps), CAN 2.0B, 3× UARTs, 2× I²C (400 kHz), 2× SPI/SSI/Microwire, EMI bus |
| ADC | 8-channel, 10-bit, 0–3.6 V input range, 0.7 µs conversion time - suitable for real-time sensor sampling in motor control loops |
| Timers & IMC | 4× 16-bit standard timers (input capture/output compare/PWM/pulse count) + dedicated 3-phase IMC with adjustable center-aligned PWM and hardware dead-time insertion |
| Power & Temp | Core supply: 1.8 V ±10%; I/O supply: 2.7–3.6 V; operating temperature: –40°C to +85°C - meets industrial-grade reliability requirements |
Pinout & Package
LQFP128 package (14 × 14 mm, 0.4 mm pitch), 128-pin quad flat pack with exposed thermal pad. Pin functions include multiplexed I/O (80 usable), dedicated Ethernet MII signals (TXD0–TXD3, RXD0–RXD3, TX_EN, RX_DV, CRS, COL), USB D+/D–, CANH/CANL, JTAG (TCK/TMS/TDI/TDO/nTRST), and IMC outputs (PWMUH/PWMLU, PWMVH/PWMLV, PWMWH/PWMLW).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD (pins 1, 13, 25, 37, 49, 61, 73, 85, 97, 109, 121) | Core power supply | 1.8 V ±10% supply for ARM966E-S core and internal logic - requires local decoupling per ST's layout guidelines |
| VDDQ (pins 2, 14, 26, 38, 50, 62, 74, 86, 98, 110, 122) | I/O power supply | 2.7–3.6 V supply for all GPIO, peripheral I/O, and interface pins - enables 5 V tolerance on inputs |
| OSC_IN / OSC_OUT (pins 3, 4) | External crystal oscillator interface | Supports 4–25 MHz crystal for internal PLL clock generation - essential for Ethernet and USB timing accuracy |
| ETH_MII_TXD0–TXD3 (pins 5–8) | Ethernet transmit data bus | 4-bit parallel MII transmit path - used with external PHY for 10/100 Mbps operation |
| ETH_MII_RXD0–RXD3 (pins 10–13) | Ethernet receive data bus | 4-bit parallel MII receive path - requires matched trace lengths for signal integrity |
| USB_DP / USB_DM (pins 15, 16) | USB differential data pair | Full-Speed (12 Mbps) USB 2.0 physical interface - requires 27 Ω series resistors and proper PCB routing |
| CAN_H / CAN_L (pins 17, 18) | CAN transceiver differential interface | CAN 2.0B Active physical layer connection - needs external transceiver and 120 Ω termination |
| PWMUH / PWMLU (pins 20, 21) | Upper/lower leg PWM for phase U | Dedicated IMC outputs with hardware dead-time insertion - eliminates software timing risk in motor drive safety-critical paths |
Key Features
| Feature | Design Value |
|---|---|
| Embedded Trace Module (ETM9) | 9-pin high-speed instruction trace interface - enables non-intrusive real-time code flow analysis without halting CPU |
| Burst Flash Architecture | Pre-fetch queue + 4-entry branch cache - sustains 96 MIPS from Flash while minimizing interrupt latency vs. cached cores |
| 3-Phase Induction Motor Controller (IMC) | Hardware-adjustable center-aligned PWM, emergency stop input, tachometer input, and automatic dead-time generation - reduces firmware complexity and improves motor safety compliance |
| Dual-Voltage Operation | Independent 1.8 V core and 2.7–3.6 V I/O supplies - allows direct interfacing with legacy 3.3 V peripherals while optimizing core power efficiency |
| Vectored Interrupt Controller (VIC) | 32 IRQ vectors, 30 interrupt pins, FIQ support - enables sub-µs response to time-critical events like ADC triggers or encoder edges |
Applications
| Industrial Gateway | Motor Drive Control |
|---|---|
|
Use Scenario: Protocol translation between Modbus RTU field devices and Ethernet-based SCADA systems. IC Role / Device Role / Timing Role: Central protocol processor with dual-interface concurrency - Ethernet MAC and UARTs operate simultaneously under DMA control. Use Value: Eliminates need for external bridge ICs; 96KB SRAM buffers multi-protocol message queues without external memory. |
Use Scenario: Closed-loop speed/torque control of 3-phase AC induction motors in HVAC blowers or conveyor systems. IC Role / Device Role / Timing Role: Real-time motor controller with hardware IMC block managing PWM generation, fault handling, and tach feedback. Use Value: Hardware dead-time insertion and emergency stop input meet IEC 61800-5-2 functional safety requirements without software overhead. |
| Medical Device Interface | Secure Embedded Terminal |
|
Use Scenario: Data acquisition and display unit aggregating analog sensor readings (temperature, pressure) and driving LCD via EMI bus. IC Role / Device Role / Timing Role: Mixed-signal controller with 8-channel 10-bit ADC, RTC calendar, and battery-backed SRAM for data logging. Use Value: On-chip 0.7 µs ADC enables 1.4 MSPS sampling across channels - sufficient for real-time physiological waveform capture. |
Use Scenario: Secure point-of-sale terminal requiring tamper detection, encrypted firmware storage, and USB host connectivity. IC Role / Device Role / Timing Role: Trusted execution environment with RTC tamper detection, OTP memory for keys, and JTAG security bit lockdown. Use Value: Tamper-detect pin triggers immediate SRAM wipe and resets - satisfies PCI PTS v6.0 physical security requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ARM9-based microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STR912FZ44X6 | Same die, but packaged in LQFP128 with lead-free (RoHS-compliant) finish and different marking - identical electrical and functional specs | No difference in use case; selected when RoHS compliance is mandatory for final product certification | Drop-in replacement where lead-free assembly is required; verify reflow profile compatibility with Pb-free solder paste |
| STM32F407VGT6 | Cortex-M4 core (168 MHz), no built-in Ethernet MAC or CAN 2.0B - requires external PHY and transceiver; higher DSP performance but lacks IMC hardware | Suitable for audio/DSP-heavy applications, not for integrated motor control or Ethernet-native gateways | Choose only if migrating to Cortex-M ecosystem and adding external Ethernet/CAN components is acceptable |
Compared with STR912FW44X6, STR912FZ44X6 offers identical functionality with RoHS compliance, while STM32F407VGT6 trades integrated peripherals for higher CPU performance and modern toolchain support - making it viable only when redesigning around external interface ICs.
Availability
STR912FW44X6 is available at Aetrix Electronics and suitable for industrial gateways, motor drive controllers, medical data loggers, and secure embedded terminals requiring stable component supply across extended production lifecycles.
Supply support for STR912FW44X6 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 management ICs, sensors, and automotive electronics since 1987.
The STR91xF family was engineered specifically for industrial and automation applications demanding integrated Ethernet, motor control, and deterministic real-time performance - bridging the gap between legacy 8/16-bit MCUs and complex application processors.
FAQ
Is STR912FW44X6 still in active production?
No - STR912FW44X6 is marked as Obsolete by STMicroelectronics per the February 2007 datasheet revision history. Aetrix Electronics maintains limited legacy inventory with full traceability and provides last-time-buy support, including documentation archives and cross-reference guidance for migration paths.
What debug interfaces does STR912FW44X6 support?
STR912FW44X6 supports JTAG via ARM EmbeddedICE® RT for real-time debugging, boundary scan testing, and in-system programming. It also includes an Embedded Trace Macrocell (ETM9) with a 9-pin trace port for non-intrusive instruction-level tracing - no SWD or SWO interfaces are present.
Can STR912FW44X6 operate without an external crystal?
No - the internal oscillator requires an external 4–25 MHz crystal connected to OSC_IN/OSC_OUT pins. There is no internal RC oscillator option; the PLL derives all system clocks (including USB and Ethernet) from this crystal source.
Does STR912FW44X6 support USB host mode?
No - STR912FW44X6 implements only USB 2.0 Full-Speed device mode (12 Mbps) with 10 endpoints and integrated FIFOs. It lacks USB OTG or host controller logic; external USB host functionality requires a companion IC such as the USB3300.
STR912FW44X6 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- 128-LQFP
- Series:
- STR9
- Packaging:
- Tray
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Core Processor:
- ARM9®
- Core Size:
- 16/32-Bit
- Speed:
- 96MHz
- Connectivity:
- CANbus, EBI/EMI, Ethernet, I2C, IrDA, Microwire, SPI, SSI, SSP, UART/USART, USB
- Peripherals:
- Brown-out Detect/Reset, DMA, Motor Control PWM, POR, PWM, WDT
- Number of I/O:
- 80
- Program Memory Size:
- 512KB (512K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- -
- RAM Size:
- 96K x 8
- Voltage - Supply (Vcc/Vdd):
- 1.65V ~ 2V
- Data Converters:
- A/D 8x10b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
STR912FW44X6 FAQ
1.How can I place an order for STR912FW44X6 through Aetrix?
Please submit a Request for Quotation (RFQ) for STR912FW44X6 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 STR912FW44X6 reliable?
The price and inventory of STR912FW44X6 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STR912FW44X6 is usually 5 days.
3.What payment methods are accepted for STR912FW44X6?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STR912FW44X6 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STR912FW44X6?
STR912FW44X6 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STR912FW44X6 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 STR912FW44X6?
For technical support, including STR912FW44X6 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STR912FW44X6 requirements.
6.How does Aetrix verify that STR912FW44X6 is sourced from the original manufacturer or authorized distributors?
All STR912FW44X6 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 STR912FW44X6 meets industry standards.
7.What is the process for return or replacement of STR912FW44X6?
All STR912FW44X6 units undergo pre-shipment inspection (PSI). If there is an issue with STR912FW44X6, 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 STR912FW44X6 part is unused and in its original packaging.
Return procedure for STR912FW44X6:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
STR912FW44X6 Tags
-
ATTINY4-TSHR
Microchip Technology
-
ATTINY10-TSHR
Microchip Technology
-
ATTINY10-TS8R
Microchip Technology
-
ATTINY202-SSNR
Microchip Technology
-
ATTINY202-SSFR
Microchip Technology
-
ATTINY402-SSNR
Microchip Technology
-
PIC16F15213T-I/MF
Microchip Technology
-
PIC16F15213-E/MF
Microchip Technology
-
PIC10F200T-I/OT
Microchip Technology
-
ATTINY412-SSNR
Microchip Technology
-
PIC10F202T-I/OT
Microchip Technology
-
ATTINY404-SSNR
Microchip Technology
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
