ADSP-21261SKBCZ150

Digital Signal Processor Dsp Overview

The ADSP-21261SKBCZ150 is a high-performance 32-bit/40-bit floating-point digital signal processor from the SHARC family, operating at a core instruction rate of 150 MHz. It features a single-instruction multiple-data (SIMD) architecture with two computational units delivering 900 MFLOPS. The device integrates 1 Mbit of dual-ported SRAM and 3 Mbits of mask-programmable ROM. Key interfaces include four full-duplex serial ports, an SPI port, a parallel port, and a Digital Application Interface (DAI) with a Signal Routing Unit (SRU). It supports IEEE 754 floating-point and 32-bit fixed-point formats.

Digital Signal Processor Dsp Feature Summary

• 150 MHz SIMD SHARC core with 900 MFLOPS performance
• 1 Mbit on-chip dual-ported SRAM and 3 Mbits mask-programmable ROM
• Digital Application Interface (DAI) with Signal Routing Unit (SRU)
• Four full-duplex serial ports and one SPI interface

Digital Signal Processor Dsp Applications

• High-performance audio processing
• Audio decoders and postprocessor algorithms
• Multichannel surround sound decoding

Digital Signal Processor Dsp Procurement Notes

Verify the specific ordering suffix SKBCZ against the manufacturer's current data sheet to confirm package type, temperature range, and lead-free status. Ensure compatibility with the required voltage supplies: 1.2 V for internal/analog cores and 3.3 V for external I/O. Confirm that the 136-ball BGA package fits the target PCB footprint and thermal design constraints.

Digital Signal Processor Dsp Selection Notes

Select this model over the ADSP-21262 or ADSP-21266 if the application requires lower memory capacity (1 Mbit SRAM vs. 2 Mbit) and does not need the additional serial ports or pre-loaded audio decoders found in those variants. The 150 MHz speed is sufficient for applications where 200 MHz performance is unnecessary. Verify that the 4 Mbit ROM limit (shared across the family max) is adequate for firmware storage without external memory.

Digital Signal Processor Dsp Part Context

This component belongs to the ADSP-2126x family of SHARC embedded processors, which are source-code compatible with earlier ADSP-21160/21161 and first-generation ADSP-2106x devices. The ADSP-21261 specifically offers a cost-optimized configuration within the family, providing 18 DMA channels compared to the 22 channels available in the ADSP-21262 and ADSP-21266 models.

Digital Signal Processor Dsp Replacement Considerations

Direct functional replacements within the same package and pinout include the ADSP-21262SKBCZ150 and ADSP-21266SKBCZ150, noting their increased memory and peripheral counts. Other SHARC family members like the ADSP-2136x require software adaptation due to architectural differences.