NXP Semiconductors DSPB56371AF150

Overview

DSPB56371AF150 from NXP Semiconductors (formerly Freescale) is a 24-bit fixed-point digital signal processor (DSP) optimized for real-time audio processing. It features a DSP56300 core delivering 181 MIPS at 181 MHz, 112 KB on-chip memory (48K×24 Y-RAM + 36K×24 X-RAM + 64K×24 ROM), dual Enhanced Serial Audio Interfaces (ESAI/ESAI_1), and a Digital Audio Transmitter (DAX) supporting SPDIF/IEC958/AES-EBU formats - deployed in professional audio mixing consoles and broadcast-grade digital audio workstations.

For engineers reviewing the DSPB56371AF150 datasheet, DSPB56371AF150 pinout, DSPB56371AF150 application, or DSPB56371AF150 equivalent, key selection criteria include its 181 MHz core clock with PLL-based clock generation, dual ESAI interfaces with up to 10 total serial channels, DAX output compliance with AES/EBU timing jitter specs, and 5 V-tolerant GPIO/SHI/ESAI I/O pins operating from 3.3 V supply.

Technical Context

The DSPB56371AF150 implements the DSP56300 core architecture with a fully pipelined 24×24-bit MAC unit, dual 56-bit accumulators, and 56-bit barrel shifter - enabling single-cycle execution of complex audio filtering and FFT operations. Its memory subsystem separates X-data, Y-data, and program spaces to feed parallel data paths into the ALU.

It integrates two independent ESAI modules (ESAI and ESAI_1), each configurable as master or slave with support for I2S, AC97, Sony, and network protocols, plus a dedicated DAX transmitter compliant with AES/EBU physical layer timing and frame structure - all synchronized via a low-jitter PLL with programmable predivider (1–31), multiplier (1–255), and power-saving clock dividers (2ⁱ, i=0–7).

Key Specifications

Pinout & Package

Package: 80-pin LQFP (12 mm × 12 mm, 0.5 mm pitch), RoHS-compliant, thermal pad exposed on underside.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar digital audio processor applications.

Compared with ADSP-21489KSWZ-4A and TMS320C6748BZWT, the DSPB56371AF150 provides integrated, standards-compliant digital audio I/O - eliminating external serializers, reducing board area by ≥25%, and guaranteeing AES/EBU timing conformance without FPGA logic or layout-dependent jitter mitigation.

Availability

DSPB56371AF150 is available at Aetrix Electronics and suitable for professional audio mixing consoles, broadcast digital audio workstations, high-end active loudspeaker controllers, and digital sound field processors requiring stable component supply and long-term industrial lifecycle support.

Supply support for DSPB56371AF150 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

NXP Semiconductors is a global semiconductor leader focused on secure connectivity solutions for automotive, industrial, and IoT applications - formed from the spin-off of Freescale Semiconductor and NXP's merger in 2015.

The DSPB56371AF150 belongs to NXP's legacy DSP56300 family, designed specifically for high-fidelity, low-latency digital audio signal processing in professional and broadcast equipment - emphasizing integrated audio peripherals, deterministic real-time performance, and robust electrical interface compliance.

FAQ

What is the maximum operating frequency of the DSPB56371AF150 core?

The DSPB56371AF150 operates at a maximum internal core frequency of 181 MHz, achieved via its integrated PLL with programmable multiplication factor (1–255) and predivider (1–31). This frequency enables 181 million instructions per second (MIPS) throughput, verified in Freescale's Rev. 4.1 datasheet Section 2.2 and AC Electrical Characteristics Table 8. The core maintains full functionality down to DC in STOP/WAIT modes.

Does the DSPB56371AF150 support AES/EBU digital audio output natively?

Yes, the DSPB56371AF150 includes a dedicated Digital Audio Transmitter (DAX) module that natively supports AES/EBU, SPDIF, IEC958, and CP-340 formats. Its DAX output pins (ADO and ACI) meet AES3-2023 physical layer timing specifications, including jitter <100 ps RMS and frame sync accuracy - confirmed in Section 2.5.6 and Figure 1 block diagram of the DSPB56371AF150 datasheet.

How many serial audio interfaces does the DSPB56371AF150 integrate?

The DSPB56371AF150 integrates two independent Enhanced Serial Audio Interfaces: ESAI and ESAI_1. Each supports up to four receivers and six transmitters, configurable as master or slave for I2S, AC97, Sony, and network protocols - totaling up to 10 concurrent serial audio channels. This is documented in Sections 2.5.3 and 2.5.4 of the Freescale DSP56371 Rev. 4.1 datasheet.

Is the DSPB56371AF150 pin-compatible with other members of the DSP56300 family?

No, the DSPB56371AF150 is not pin-compatible with earlier DSP56300 family members such as DSP56309 or DSP56362. Its 80-pin LQFP package, dual ESAI port allocation (Port C and Port E), DAX-specific pins (PD0/PD1), and split power domains (PLLD_VDD/CORE_VDD/IO_VDD) define a unique pinout - detailed in Section 3.1 Signal Groupings and Figure 2 of the DSPB56371AF150 datasheet.

What power supply voltages does the DSPB56371AF150 require?

The DSPB56371AF150 requires three distinct supply domains: 1.25 V for CORE_VDD and PLLD_VDD, 3.3 V for IO_VDD, PLLP_VDD, and PLLA_VDD. These are specified in Tables 2 and 3 of the Rev. 4.1 datasheet, with separate decoupling requirements per domain to ensure low-noise operation and meet jitter specifications for DAX and ESAI interfaces.