UPSD3354D-40U6 STMicroelectronics Integrated Circuit (Other) In Stock
STMicroelectronics UPSD3354D-40U6 is an 8-bit 8032 (8051-compatible) Turbo series MCU with integrated programmable logic (PLD), running at up to 40 MHz with 256 KB Flash and 32 KB SRAM. It combines on-chip CPLD-like PLD macrocells, ADC, DAC, and boundary scan JTAG in a single device. Available worldwide for industrial and embedded control applications.
- Manufacturer
- STMicroelectronics
- Package
- Other
- Pin Count
- 80
- Lifecycle
- OBSOLETE
- Datasheet
- UPSD3354D-40U6 Datasheet PDF
- Category
- Integrated Circuit
- Temp Range
- -40.0°C to 85.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of UPSD3354D-40U6?
- Integrated CPLD-like programmable logic (PLD) with 8051-compatible 8032 CPU at up to 40 MHz, reducing external glue logic
- 256 KB on-chip Flash with in-system programmability (ISP) and 32 KB SRAM for large firmware and data buffers
- On-chip ADC, DAC, UART, and JTAG boundary scan in one device, reducing BOM count in industrial controller designs
What is UPSD3354D-40U6 used for?
The UPSD3354D-40U6 is used in industrial programmable controllers, factory automation HMIs, and embedded test equipment where the combination of an 8051-compatible CPU and on-chip programmable logic replaces a separate MCU plus CPLD design. Its 40 MHz clock and 256 KB Flash support real-time motor control algorithms and large communication stacks such as Modbus RTU. Manufacturers targeting legacy 8051 code bases benefit from the drop-in architectural compatibility while gaining integrated PLD flexibility for custom I/O decoding.
What are the specifications of UPSD3354D-40U6?
| YTEOL | 0 |
| Has ADC | YES |
| Address Bus Width | 12 |
| Bit Size | 8 |
| Boundary Scan | YES |
| CPU Family | 8051 |
| Clock Frequency-Max | 40MHz |
| DAC Channels | YES |
| DMA Channels | NO |
| External Data Bus Width | 8 |
| JESD-30 Code | S-PQFP-G80 |
| JESD-609 Code | e3/e4 |
| Number of I/O Lines | 46 |
| On Chip Program ROM Width | 8 |
| PWM Channels | YES |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | QFP80,.55SQ,20 |
| Package Shape | SQUARE |
| Package Style | FLATPACK, LOW PROFILE, FINE PITCH |
| Peak Reflow Temperature (Cel) | NOT SPECIFIED |
| Qualification Status | Not Qualified |
| RAM (bytes) | 32768 |
| ROM (words) | 262144 |
| ROM Programmability | FLASH |
| Speed | 40MHz |
| Supply Voltage-Max | 5.5V |
| Supply Voltage-Min | 4.5V |
| Supply Voltage-Nom | 5V |
| Surface Mount | YES |
| Technology | CMOS |
| Temperature Grade | INDUSTRIAL |
| Terminal Finish | TIN/NICKEL PALLADIUM GOLD |
| Terminal Form | GULL WING |
| Terminal Pitch | 0.5mm |
| Terminal Position | QUAD |
| Time@Peak Reflow Temperature-Max (s) | NOT SPECIFIED |
| uPs/uCs/Peripheral ICs Type | MICROCONTROLLER |
| Package | Other |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| ECCN | 3A991.a.2 |
| HTS Code | 8542.31.00.15 |
Where can I find the UPSD3354D-40U6 datasheet?
UPSD3354D-40U6 Datasheet DownloadOfficial datasheet from STMicroelectronics
What are equivalent replacements for UPSD3354D-40U6?
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
How does the on-chip PLD in UPSD3354D-40U6 reduce external component count in industrial designs?
The UPSD3354D-40U6 integrates a CPLD-like programmable logic array with 8051 CPU, eliminating the need for a separate CPLD or PAL device that would otherwise be required for address decoding, chip-select generation, and glue logic. This consolidation reduces the BOM by 1-2 ICs, shrinks PCB area, and lowers power consumption. The PLD is programmed via the same JTAG boundary-scan interface used for MCU debugging, simplifying production programming.
What is the maximum clock frequency of UPSD3354D-40U6 and how does it compare to standard 8051 variants?
The UPSD3354D-40U6 Turbo series operates at up to 40 MHz, which is approximately 4 to 8 times faster than classic 8051 devices running at 6 MHz to 12 MHz. Because the UPSD uses a single-cycle instruction pipeline rather than the original 8051's 12-clock-per-instruction architecture, effective MIPS throughput is significantly higher, enabling Modbus RTU, PID control loops, and communication stacks that would require a 16-bit MCU in a standard 8051 implementation.
Does UPSD3354D-40U6 support in-system firmware updates without a JTAG programmer?
Yes, the UPSD3354D-40U6 supports in-system programming (ISP) through its serial UART interface, allowing firmware updates in the field without removing the device or connecting JTAG hardware. The 256 KB Flash is divided into programmable sectors, and STMicroelectronics provides an ISP boot code stored in a protected boot sector. This is particularly valuable for deployed industrial equipment requiring firmware maintenance over RS-232 or RS-485 communication links.
What ADC and DAC capabilities does UPSD3354D-40U6 include for analog sensor interfacing?
The UPSD3354D-40U6 includes an on-chip ADC and DAC, reducing the need for external analog conversion components in sensor acquisition and actuator drive circuits. The 8-bit external data bus and 12-bit address bus support direct interfacing with external memory-mapped peripherals. Combined with the integrated PLD for custom analog multiplexer control, the device handles multi-channel sensor inputs typical in industrial process monitoring and 4-20 mA loop interface cards without additional ICs.
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About STMicroelectronics
STMicroelectronics is a global semiconductor leader serving customers across the spectrum of electronics applications. ST's products are found in a wide range of applications including automotive, industrial, personal electronics, and communications.
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