Analog Devices Inc. ADSP-21489KSWZ-5B

Overview

ADSP-21489KSWZ-5B from Analog Devices is a 450 MHz, 32-bit/40-bit floating-point SHARC® DSP optimized for high-fidelity audio processing, featuring 5 Mbits of on-chip SRAM, 4 Mbits of mask-programmed ROM with Dolby®/DTS® audio decoders, and SIMD computational architecture delivering 2.7 GFLOPS. It integrates S/PDIF transceiver, eight serial ports (SPORT), four asynchronous sample rate converters (ASRC), digital applications interface (DAI), and precision clock generators - deployed in professional audio mixers, broadcast encoders, and automotive infotainment head units.

For engineers reviewing the ADSP-21489KSWZ-5B datasheet, ADSP-21489KSWZ-5B pinout, ADSP-21489KSWZ-5B application, or ADSP-21489KSWZ-5B equivalent, key selection criteria include its 450 MHz core frequency, 5 Mbit on-chip RAM allocation, S/PDIF Tx/Rx capability, AEC-Q100 qualification, and 88-lead LFCSP_VQ package with thermal diode support.

Technical Context

The ADSP-21489KSWZ-5B implements a dual-processing-element SIMD core (PEx and PEy), each with ALU, multiplier, shifter, and 16×40-bit register file, enabling parallel execution of identical instructions on independent data streams. Its enhanced Harvard architecture supports simultaneous 48-bit instruction fetch and four 32-bit operand transfers per cycle via PM/DM buses and instruction cache.

Peripherals are partitioned into I/O processor domains: DAI includes S/PDIF transceiver, PCG, IDP/PDAP, and ASRC; DPI provides UART, TWI, SPI, PWM, and timers; external port supports AMI (not SDRAM) due to its 88-lead LFCSP_VQ package. The device uses VISA (16-/32-bit compressed instructions) for code density improvement and includes ROM-based security with 64-bit JTAG key authentication.

Key Specifications

Pinout & Package

ADSP-21489KSWZ-5B is housed in an 88-lead LFCSP_VQ (Lead Frame Chip Scale Package, Very Thin Quad) with exposed thermal pad (EP), measuring 12 mm × 12 mm × 0.8 mm. This package omits SDRAM controller signals and supports only AMI-based external memory expansion. Pin functions are defined per Analog Devices' "88-Lead LFCSP_VQ Lead Assignment" (Rev. I, p.59).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-performance audio DSP applications.

Compared with ADSP-21489KSWZ-4 and ADSP-21487KSWZ-5, the ADSP-21489KSWZ-5B uniquely combines 450 MHz performance, full 5 Mbit RAM, factory-programmed Dolby/DTS ROM, and AEC-Q100 qualification - making it the only option for automotive-grade, high-channel-count, secure audio processing in space-constrained LFCSP layouts.

Availability

ADSP-21489KSWZ-5B is available at Aetrix Electronics and suitable for professional audio mixer design, broadcast encoder development, and automotive infotainment head unit production requiring stable component supply and long-term lifecycle assurance.

Supply support for ADSP-21489KSWZ-5B 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

Analog Devices, Inc. is a global semiconductor leader specializing in high-performance analog, mixed-signal, and DSP technologies for precision signal processing applications.

The ADSP-21489KSWZ-5B belongs to the SHARC® family - engineered specifically for computationally intensive, low-latency audio signal processing in professional, broadcast, and automotive environments.

FAQ

What is the maximum operating frequency of the ADSP-21489KSWZ-5B?

The ADSP-21489KSWZ-5B operates at a guaranteed maximum frequency of 450 MHz under specified voltage (VDD_CORE = 1.1 V ±3%) and temperature (–40°C to +85°C) conditions. This enables benchmark performance of 20.44 μs for a 1024-point complex FFT and 1.1 ns per FIR tap, as verified in Analog Devices' Rev. I datasheet (p.3, Table 1). The 450 MHz rating is specific to the ADSP-21489KSWZ-5B variant and not shared with lower-speed members like ADSP-21489KSWZ-4.

Does the ADSP-21489KSWZ-5B support SDRAM interfacing?

No, the ADSP-21489KSWZ-5B does not support SDRAM interfacing. As confirmed in Table 2 (p.3) and Pin Function Descriptions (p.15) of the Rev. I datasheet, the 88-lead LFCSP_VQ package omits SDRAM controller pins. Only the AMI (asynchronous memory interface) is available for connecting SRAM or Flash. Attempting to route SDRAM signals to this package will result in unconnected pins and functional failure.

What audio decoders are included in the on-chip ROM of the ADSP-21489KSWZ-5B?

The ADSP-21489KSWZ-5B includes 4 Mbits of mask-programmed ROM containing licensed Dolby® Labs and DTS® multichannel audio decoding and post-processing algorithms. As stated in Table 2 footnote 2 (p.3), decoder combinations vary by chip version and system configuration; full details are published on analog.com. This ROM is absent in ADSP-21487 variants and not user-programmable.

Is the ADSP-21489KSWZ-5B qualified for automotive applications?

Yes, the ADSP-21489KSWZ-5B is AEC-Q100 qualified (Grade 3, –40°C to +85°C), as explicitly noted in the Features section (p.1) and Automotive Products chapter (p.69) of the Rev. I datasheet. This qualification covers thermal cycling, humidity testing, and ESD robustness required for infotainment and ADAS audio subsystems - distinguishing it from non-automotive variants like ADSP-21489BSWZ-5B.

How does the ROM-based security feature work on the ADSP-21489KSWZ-5B?

The ADSP-21489KSWZ-5B implements ROM-based security by disabling external boot and restricting JTAG access until a unique 64-bit customer key is scanned via TDI. As described on p.7, this prevents unauthorized reading of internal code and enforces exclusive execution from the secured ROM. Emulation remains available post-key authentication, but no debug access is granted without the correct key - a hardware-enforced protection not present in ADSP-21487 or ADSP-21486 variants.