ADSP-2181BSTZ-133 Analog Devices Integrated Circuit (Quad Flat Packages) In Stock
The ADSP-2181BSTZ-133 by Analog Devices is a 16-bit fixed-point digital signal processor (DSP) running at up to 33 MIPS with a 16.67 MHz max clock, featuring a 14-bit address bus, 24-bit external data bus, barrel shifter, and ROM-less architecture. It is housed in a 128-pin TQFP package, targeting audio processing, modems, and embedded control applications.
- Manufacturer
- Analog Devices
- Package
- Quad Flat Packages
- Pin Count
- 128
- Lifecycle
- OBSOLETE
- Datasheet
- ADSP-2181BSTZ-133 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 ADSP-2181BSTZ-133?
- 33 MIPS sustained performance with single-cycle instruction execution enabling real-time 16-bit DSP computations
- ROM-less architecture with 14-bit address bus and 24-bit external data bus for flexible external memory expansion
- Hardware barrel shifter supporting fast shift operations critical for audio and communications signal processing
- 128-pin TQFP surface-mount package (ST-128-2) balancing high pin count with manageable PCB footprint
- 16.67 MHz maximum clock frequency providing deterministic timing for embedded control and modem applications
What is ADSP-2181BSTZ-133 used for?
The ADSP-2181BSTZ-133 is used in audio codecs, voice-band modems, and industrial motor control systems that require sustained 16-bit fixed-point arithmetic at 33 MIPS. It is well-suited for digital filtering, fast Fourier transforms (FFT), and adaptive equalization in telecommunications equipment operating with external memory. The ROM-less design also makes it a flexible choice for embedded systems where firmware is stored externally and updated in the field.
What are the specifications of ADSP-2181BSTZ-133?
| Pbfree Code | No |
| Manufacturer Package Code | ST-128-2 |
| YTEOL | 0 |
| Additional Feature | 33 MIPS SUSTAINED; SINGLE CYCLE INSTRUCTION EXECUTION |
| Address Bus Width | 14 |
| Barrel Shifter | YES |
| Bit Size | 16 |
| Boundary Scan | NO |
| Clock Frequency-Max | 16.67MHz |
| External Data Bus Width | 24 |
| Format | FIXED POINT |
| Integrated Cache | NO |
| Internal Bus Architecture | MULTIPLE |
| JESD-30 Code | R-PQFP-G128 |
| JESD-609 Code | e3 |
| Low Power Mode | YES |
| Number of DMA Channels | 2 |
| Number of External Interrupts | 4 |
| Number of Serial I/Os | 2 |
| Number of Timers | 1 |
| On Chip Data RAM Width | 16 |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | QFP128,.63X.87,20 |
| Package Shape | RECTANGULAR |
| Package Style | FLATPACK, LOW PROFILE, FINE PITCH |
| Peak Reflow Temperature (Cel) | 260 |
| Qualification Status | Not Qualified |
| RAM (words) | 8192 |
| Supply Current-Max | 100mA |
| Supply Voltage-Max | 5.5V |
| Supply Voltage-Min | 4.5V |
| Supply Voltage-Nom | 5V |
| Surface Mount | YES |
| Technology | CMOS |
| Temperature Grade | INDUSTRIAL |
| Terminal Finish | Matte Tin (Sn) |
| Terminal Form | GULL WING |
| Terminal Pitch | 0.5mm |
| Terminal Position | QUAD |
| Time@Peak Reflow Temperature-Max (s) | 40 |
| uPs/uCs/Peripheral ICs Type | DIGITAL SIGNAL PROCESSOR, OTHER |
| Package | Quad Flat Packages |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 3 |
| ECCN | 3A991.A.2 |
| HTS Code | 8542.31.00.01 |
Where can I find the ADSP-2181BSTZ-133 datasheet?
ADSP-2181BSTZ-133 Datasheet DownloadOfficial datasheet from Analog Devices
What are equivalent replacements for ADSP-2181BSTZ-133?
Compatible alternatives and drop-in replacements for ADSP-2181BSTZ-133:
Digital Signal Processor, 16-Bit Size, 24-Ext Bit, 16.67MHz, CMOS, PQFP128
Frequently Asked Questions
What is the peak processing performance of the ADSP-2181BSTZ-133 and at what clock frequency does it operate?
The ADSP-2181BSTZ-133 delivers 33 MIPS of sustained processing performance with single-cycle instruction execution at a maximum clock frequency of 16.67 MHz. This makes it capable of real-time 16-bit DSP tasks such as FIR filtering and FFT computation in audio and modem applications without stall cycles that would degrade throughput.
How does the ROM-less design of the ADSP-2181BSTZ-133 affect external memory interfacing?
Because the ADSP-2181BSTZ-133 is ROM-less, all program code must be stored in external memory accessible via its 14-bit address bus and 24-bit external data bus. This gives designers flexibility to choose the memory size and type, supporting up to 16K words of program memory via the 14-bit address space. It also allows firmware updates by replacing or reprogramming the external memory device without replacing the DSP chip itself.
For a 16-bit audio signal processing pipeline running at 33 MIPS, how does ADSP-2181BSTZ-133 compare to higher-performance DSPs?
At 33 MIPS and a 16.67 MHz clock, the ADSP-2181BSTZ-133 is sufficient for single-channel 16-bit audio filtering and voice-band modem algorithms that do not require floating-point arithmetic. Compared to higher-performance DSPs operating at 100 MHz or above, it offers lower power consumption and lower cost for legacy designs, making it the preferred choice when sustaining existing audio or control applications rather than adding new 32-bit precision computation requirements.
What package does the ADSP-2181BSTZ-133 use and how many pins does it have for PCB layout planning?
The ADSP-2181BSTZ-133 is housed in a 128-pin TQFP (Thin Quad Flat Package) with the manufacturer code ST-128-2. The TQFP-128 package provides the large number of I/O pins needed for a 24-bit external data bus and 14-bit address bus while maintaining a flat surface-mount profile compatible with standard reflow soldering, enabling integration into multi-layer PCBs in telecommunications and industrial control equipment.
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Why Buy from FindMyChip
About Analog Devices
Analog Devices (ADI) is a global leader in high-performance analog, mixed-signal, and digital signal processing integrated circuits used in virtually all types of electronic equipment.
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