ADSP-1081AKN - 8x8 CMOS Multiplier, 40-CDIP | Analog Devices
MPN: ADSP-1081AKN ✗ End of LifeADSP-1081AKN Overview
A digital multiplier is an arithmetic combinational device that accepts two binary operands and produces a partial-product result. An 8 x 8 multiplier can represent a multiplication involving two 8-bit unsigned operands and generate a correspondingly wider result. In the hierarchy of DSP peripherals, this device sits below programmable digital signal processors and microprocessors but above simpler logic functions. It is useful where a fixed arithmetic operation must be performed without using general-purpose processor firmware.
Verified marketplace data identifies the ADSP-1081AKN as an 8 x 8 CMOS multiplier, DSP peripheral, and digital multiplier. The listed package is a 40-CDIP measuring 0.600 inch, or 15.24 mm, in width. Other listings identify through-hole mounting, a rectangular package body, a commercial temperature grade, and a nominal 5 V operating voltage. A marketplace source also reports a 16-bit output data-bus width.
The 40-pin through-hole format offers generous pin pitch and mechanical clearance for legacy systems, laboratory equipment, and industrial control boards. However, its ceramic DIP footprint is not interchangeable with modern plastic DIP, PLCC, or leadless chip-carrier packages without redesign. Because this is a legacy Analog Devices DSP peripheral, buyers should confirm signal-level compatibility, control timing, and availability before treating it as a standard modern logic component.
Typical applications include dedicated digital filtering, signal correlation, modulation, scaling, and fixed-point arithmetic blocks. The multiplier can also support test equipment, educational DSP trainers, and aging industrial systems that already use the ADSP-1081AKN pin arrangement. Because the verified data does not provide clock-rate, logic-threshold, propagation-delay, or operating-temperature details, those parameters require confirmation from the original manufacturer documentation.
When replacing this device, engineers should verify the exact 40-CDIP footprint, power-rail tolerances, input and output pin functions, and the required output-word width. Rochester Electronics and several specialist distributors list the part in original manufacturer-standard packaging. This page consolidates package, pricing, sourcing, and replacement guidance rather than reproducing the complete legacy datasheet.
A key purchasing consideration is that the component is reported as obsolete by a specialist lifecycle listing, so supply should be treated as limited or inventory-driven. A quoted unit price of $19.49 starts at Rochester Electronics, with volume discount breaks referenced for quantities of 10, 100, 500, and 1,000, although the verified data does not state the discounted prices.
Drop-in alternatives for ADSP-1081AKN — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
No drop-in alternatives available for this product.
Request AlternativesADSP-1081AKN Specifications
| Manufacturer | Analog Devices |
| Device Type | 8 x 8 CMOS multiplier / DSP peripheral |
| Multiplier Configuration | 8-bit x 8-bit |
| Output Data Bus Width | 16 bit |
| Nominal Supply Voltage | 5 V |
| Process Technology | CMOS |
| Package Type | 40-CDIP |
| Package Code | DIP |
| Package Shape | Rectangular |
| Package Width | 0.600 inch (15.24 mm) |
| Number of Terminals | 40 |
| Mounting Type | Through-hole |
| Temperature Grade | Commercial |
| Category | Processor & Peripheral / DSP Peripheral |
| Lifecycle Status | Obsolete |
ADSP-1081AKN 0.600 inch (15.24 mm) Pin Configuration Guide
Pin configuration for ADSP-1081AKN (0.600 inch (15.24 mm) package). Pin numbering, functions, and connection diagrams are defined in the manufacturer datasheet. Refer to it for the exact footprint and soldering guidelines.
No detailed pinout data available for ADSP-1081AKN.
Refer to the datasheet for full pin configuration.
Typical Applications
ADSP-1081AKN is suitable for 6 applications: Legacy Digital Signal Processing, Digital Filtering and Correlation, Fixed-Point Scaling and Modulation, Industrial Test and Measurement, Educational DSP Trainer Systems, Obsolete Equipment Spare Parts.
Legacy Digital Signal Processing
The ADSP-1081AKN fits a legacy DSP board that requires a dedicated 8 x 8 multiplication function. Its verified 16-bit output data bus provides the result width expected by the surrounding digital logic, while the nominal 5 V CMOS supply matches conventional legacy control electronics. Using the original multiplier preserves the existing 40-CDIP footprint and avoids requalifying a proven system. The main procurement constraint is its reported obsolete lifecycle status, so inventory traceability and date-code documentation should be confirmed before installation.
Recommended
Digital Filtering and Correlation
The ADSP-1081AKN can be used in fixed-coefficient filtering, correlation, and convolution blocks where repeated 8-bit operand multiplication is required. Its 8 x 8 CMOS multiplier performs the arithmetic operation directly, while the verified 16-bit output bus accommodates the widened partial-product result. This is particularly useful when preserving an existing legacy board is more important than maximum throughput. Designers must still confirm propagation delay and operating speed against the original datasheet before applying it to a new filter implementation.
Recommended
Fixed-Point Scaling and Modulation
The ADSP-1081AKN is applicable to legacy fixed-point arithmetic blocks that scale, modulate, or transform sampled data using an 8 x 8 multiplication. Its dedicated CMOS implementation removes the need to allocate processor multiplier cycles for the operation. The nominal 5 V supply and 16-bit output bus align with older TTL-CMOS and CMOS logic systems. Because the verified data does not specify throughput, signed or unsigned operand behavior, or output timing, those details must be established from the original documentation before schematic reuse.
Recommended
Industrial Test and Measurement
A dedicated multiplier supports product-test equipment that evaluates gain, attenuation, or scaling values in an embedded digital measurement path. The ADSP-1081AKN can sit within a legacy analyzer where the board already expects a 40-CDIP multiplier and a 5 V CMOS interface. Its specialized arithmetic role allows the original board architecture to be preserved during maintenance. Because this device is reported obsolete, long-term spares should be bought from specialist sources that can document original manufacturer-standard packaging and traceability.
Recommended
Educational DSP Trainer Systems
The ADSP-1081AKN suits educational DSP trainers that illustrate parallel multiplication, partial products, and fixed-point arithmetic. The dedicated 8 x 8 CMOS function is easy to observe with external counters, displays, or laboratory test equipment, and the through-hole 40-CDIP package is convenient for legacy trainer boards. The component broadens the teaching material beyond basic gates into a purpose-built DSP peripheral. Users should confirm the logic-high and logic-low thresholds and the maximum operating frequency before connecting modern laboratory instrumentation.
Recommended
Obsolete Equipment Spare Parts
The ADSP-1081AKN is appropriate as a repair component for original equipment using the same 40-CDIP footprint and multiplier pinout. Rochester Electronics is reported to offer the part in original manufacturer-standard packaging, which is important when restoring obsolete test, control, or signal-processing equipment. Buyers should compare the complete pinout, supply limits, and timing against the failed device before installation. Because the ADSP-1081AKN is reported obsolete and alternatives were not verified, a documented original replacement is generally safer than an unconfirmed substitute.
Recommended
Engineering reference data for ADSP-1081AKN — comparison, design guidance, and compliance information.
Selection Guide
Key Differentiators
- Dedicated legacy multiplication function (vs TMS320C10FNLR)
- Verified original-marketplace sourcing (vs Unverified generic DIP multiplier)
- Established legacy 40-CDIP footprint (vs PLCC or surface-mount multiplier)
Design Notes
Do not treat a similarly named ADSP-1081 family member as a drop-in replacement without checking the full ordering code. The verified material identifies the ADSP-1081AKN as a 40-CDIP part but does not provide pin-level compatibility for related suffix variants. Before assembly, verify pin 1 orientation, the 40-terminal footprint, supply limits, logic thresholds, operand signs, and output timing against the original manufacturer documentation.
The ADSP-1081AKN uses a legacy ceramic through-hole footprint rather than a modern surface-mount land pattern. Preserve adequate clearance between adjacent DIP rows, inspect the socket for oxidation, and observe the correct polarity or notch orientation during replacement. A socket may ease future service, but its contact resistance and capacitance should be checked in high-speed or noise-sensitive legacy circuits.
Use the nominal 5 V rail only after confirming the device's permitted supply range, current consumption, and sequencing requirements from the original datasheet. Add local bypass capacitance close to the device pins where the legacy board pattern provides it. Do not derive supply tolerances from the marketplace listings alone, and avoid substituting a rail with materially different noise or settling behavior.
Compliance Information
The supplied web data does not state RoHS, REACH, halogen-free, or conflict-minerals status. The component is a commercial-grade legacy DSP peripheral and is reported as obsolete.
