Analog Devices Inc. ADSP-21364KBCZ-1AA

Overview

ADSP-21364KBCZ-1AA from Analog Devices is a 32-/40-bit floating-point SHARC® DSP optimized for high-performance automotive audio processing, featuring 333 MHz core instruction rate, 3M bits of on-chip SRAM, 4M bits of mask-ROM, and integrated S/PDIF transceiver with 8-channel asynchronous sample rate conversion (ASRC) supporting –140 dB SNR. It executes two GFLOPS in SIMD mode and supports real-time audio decoding including Dolby Pro Logic IIx and DTS ES.

For engineers reviewing the ADSP-21364KBCZ-1AA datasheet, ADSP-21364KBCZ-1AA pinout, ADSP-21364KBCZ-1AA application, or ADSP-21364KBCZ-1AA equivalent, key selection criteria include its audiocentric peripherals (PCG, DTCP, IDP), ROM-based security with 64-bit JTAG key enforcement, and dual-domain clock architecture enabling simultaneous core and peripheral operation at full bandwidth.

Technical Context

The ADSP-21364KBCZ-1AA implements a dual-processing-element SIMD core (PEX/PEY), each with ALU, multiplier, shifter, and 40-bit register file, enabling parallel execution of IEEE 32-bit single-precision and 40-bit extended-precision floating-point operations. Its enhanced Harvard architecture supports single-cycle fetch of one instruction and four operands via PM/DM buses and instruction cache.

It integrates a dedicated I/O processor managing 32-bit DMA for six serial ports, two SPI interfaces, S/PDIF Tx/Rx, eight ASRC channels, DTCP cipher, and digital audio interface (DAI) with signal routing unit (SRU) for flexible peripheral interconnection - all operating independently of the core under separate PCLK domain.

Key Specifications

Pinout & Package

ADSP-21364KBCZ-1AA is housed in a 136-ball CSP_BGA package (ball pitch: 0.5 mm, body size: 10 mm × 10 mm), optimized for compact automotive audio modules requiring thermal efficiency and high I/O density.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADSP-21365KBCZ-1AA, the ADSP-21364KBCZ-1AA omits MPEG-2 AAC decoding but retains identical S/PDIF, ASRC, DTCP, and PWM capabilities - making it optimal for Dolby/DTS-centric automotive systems. Against TMS320C6748BZWT, it delivers turnkey audio subsystem integration with no external timing or protection ICs needed.

Availability

ADSP-21364KBCZ-1AA is available at Aetrix Electronics and suitable for automotive infotainment head units, digital signal processing amplifiers, secure premium audio playback systems, and multi-zone automotive audio controllers requiring stable component supply across extended product lifecycles.

Supply support for ADSP-21364KBCZ-1AA 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 leader in high-performance analog, mixed-signal, and DSP technology, headquartered in Norwood, MA, serving automotive, industrial, communications, and consumer markets.

The ADSP-21364KBCZ-1AA belongs to the SHARC® family of SIMD audio DSPs, designed specifically for real-time, low-latency, high-SNR automotive audio processing with integrated security and audiocentric peripherals.

FAQ

What is the maximum operating frequency of the ADSP-21364KBCZ-1AA?

The ADSP-21364KBCZ-1AA operates at a maximum core instruction rate of 333 MHz, confirmed in the Rev. J datasheet Section "Specifications". This frequency enables two GFLOPS performance in SIMD mode and supports real-time execution of demanding audio algorithms such as 1024-point complex FFT in 27.9 μs. The PLL derives this clock from an external crystal or oscillator referenced to the CLK_CFG pins, and the device maintains timing integrity across automotive temperature ranges (–40°C to +105°C).

Does the ADSP-21364KBCZ-1AA support S/PDIF transmission and reception?

Yes, the ADSP-21364KBCZ-1AA integrates a fully compliant S/PDIF transceiver with dedicated TX and RX pins, supporting biphase-mark encoding and decoding per IEC 60958. It accepts 16-, 18-, 20-, or 24-bit word widths in left-justified, I2S, or right-justified formats. The S/PDIF block is directly connected to the DAI and routed via the SRU, eliminating need for external transceivers in automotive amplifier or head unit designs using the ADSP-21364KBCZ-1AA.

How does ROM-based security function on the ADSP-21364KBCZ-1AA?

The ADSP-21364KBCZ-1AA implements ROM-based security by disabling external boot modes and restricting JTAG memory access unless a unique 64-bit customer-specific key is scanned via the TDI pin. When enabled, the processor boots exclusively from internal mask-ROM and ignores external code loading. This feature is documented in the "ROM-Based Security" section of the Rev. J datasheet and applies identically to the ADSP-21364KBCZ-1AA across all supported packages.

What sample rate conversion capability does the ADSP-21364KBCZ-1AA provide?

The ADSP-21364KBCZ-1AA includes eight channels of asynchronous sample rate conversion (ASRC) implemented via four SRC blocks derived from the AD1896 architecture, delivering –140 dB SNR. These blocks operate independently of the core CPU and support phase-coherent multichannel resampling - critical for bridging jittery S/PDIF inputs to low-noise DACs. This capability is explicitly assigned to the ADSP-21364 in Table 2 of the Rev. J datasheet.

Is the ADSP-21364KBCZ-1AA pin-compatible with other ADSP-2136x variants?

Yes, the ADSP-21364KBCZ-1AA shares identical 136-ball CSP_BGA pinout with ADSP-21362KBCZ-1AA, ADSP-21363KBCZ-1AA, ADSP-21365KBCZ-1AA, and ADSP-21366KBCZ-1AA per the "136-Ball BGA Pin Configurations" section (Page 50) of the Rev. J datasheet. All share identical power, ground, clock, JTAG, and peripheral pin assignments; functional differences (e.g., DTCP, S/PDIF, ASRC SNR) are enabled/disabled via internal configuration registers, not pin strapping.