Texas Instruments OMAPL137BZKBT3

Overview

OMAPL137BZKBT3 from Texas Instruments is a dual-core low-power applications processor integrating a 375/456-MHz ARM926EJ-S RISC MPU and a 375/456-MHz TMS320C674x VLIW DSP on a single die, with 128KB shared RAM, 256KB L2 unified RAM/cache, and 3.3-V LVCMOS I/Os (USB interfaces at 1.8 V). It targets real-time audio processing in A/V receivers and automotive amplifiers.

For engineers reviewing the OMAPL137BZKBT3 datasheet, OMAPL137BZKBT3 pinout, OMAPL137BZKBT3 application, or OMAPL137BZKBT3 equivalent, key selection criteria include dual-core clock scaling (1.2 V @ 375 MHz / 1.3 V @ 456 MHz), EMAC + RMII support, McASP with DIT capability, and PRUSS for deterministic peripheral control - all validated for industrial temperature operation.

Technical Context

The OMAPL137BZKBT3 implements a tightly coupled dual-subsystem architecture: the ARM926EJ-S handles OS services, UI, and protocol stacks using its MMU, 16KB I-cache/16KB D-cache, and 64KB ROM, while the C674x DSP executes signal-intensive tasks with IEEE SP/DP floating-point arithmetic, two-level cache (32KB L1P, 32KB L1D, 256KB L2), and hardware-accelerated RCPxP/RSQRxP operations.

Peripheral interconnect uses a hierarchical bus matrix with AHB for ARM subsystem access, configurable pin multiplexing, and dedicated EDMA3 (32 channels + 8 QDMA) to offload data movement between McASPs, EMAC, USB, and external memory interfaces (EMIFA for NAND/NOR/SDRAM; EMIFB for high-speed SDRAM).

Key Specifications

Pinout & Package

OMAPL137BZKBT3 is housed in a 256-ball Pb-free plastic BGA (ZKB package) with 1.0-mm ball pitch and 17.00 mm × 17.00 mm body size. The package supports industrial temperature range (–40°C to 85°C) and requires controlled PCB stack-up for signal integrity across high-speed McASP, EMAC, and DDR traces.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual-core audio processor applications.

Compared with OMAPL137BZKBT3, OMAPL138BZKBT3 offers identical functionality with extended thermal rating, while TDA3ML delivers higher compute throughput but sacrifices McASP DIT and introduces architectural complexity - making OMAPL137BZKBT3 optimal for cost-sensitive, thermally constrained audio-only applications.

Availability

OMAPL137BZKBT3 is available at Aetrix Electronics and suitable for A/V receivers, automotive amplifiers, and professional audio mixers requiring stable component supply through long-life production cycles.

Supply support for OMAPL137BZKBT3 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

Texas Instruments is a global semiconductor company headquartered in Dallas, Texas, specializing in analog, embedded processing, and wireless technologies with over 50 years of innovation in industrial and automotive electronics.

The OMAP-L137 product line was designed specifically for low-power, high-fidelity audio applications demanding dual-core heterogeneity, integrated McASP with DIT, and industrial-grade reliability - targeting A/V, automotive, and pro-audio markets.

FAQ

What is the maximum operating frequency of the OMAPL137BZKBT3 and under what voltage conditions?

The OMAPL137BZKBT3 operates at up to 456 MHz for both the ARM926EJ-S and C674x DSP cores when supplied with a 1.3-V core voltage. At 1.2 V, the maximum frequency is 375 MHz. These ratings are specified across the industrial temperature range (–40°C to 85°C) and require compliant power sequencing per the SPRS563G datasheet.

Does the OMAPL137BZKBT3 support boot from NAND flash, and what interface does it use?

Yes, the OMAPL137BZKBT3 supports NAND flash boot via its EMIFA interface, which handles 8-bit or 16-bit NAND devices with hardware ECC generation. The boot ROM initializes the NAND controller, loads the first-stage bootloader (X-Loader) into internal RAM, and passes control - enabling reliable field firmware recovery without external programming hardware.

How many McASP modules does the OMAPL137BZKBT3 include, and which one supports DIT mode?

The OMAPL137BZKBT3 integrates three multichannel audio serial ports (McASP0, McASP1, McASP2). Only McASP2 is DIT-capable, providing native S/PDIF transmitter functionality with integrated channel status generation - eliminating the need for external S/PDIF serializer ICs in digital audio output designs.

What is the role of the PRUSS in the OMAPL137BZKBT3, and how is it used in audio applications?

The Programmable Real-Time Unit Subsystem (PRUSS) in the OMAPL137BZKBT3 contains two independent 32-bit RISC cores with dedicated 4KB instruction RAM and 512B data RAM each. In audio applications, it handles time-critical tasks such as PWM dead-band generation for Class-D amplifier gate drivers, eQEP-based motor position tracking, and GPIO-based relay control - all with deterministic sub-microsecond latency, offloading the ARM and DSP.

Is the OMAPL137BZKBT3 pin-compatible with other OMAP-L13x variants, and what are the key compatibility constraints?

The OMAPL137BZKBT3 shares the same 256-ball ZKB package and pinout with OMAPL138BZKBT3, enabling mechanical and layout compatibility. However, it is not compatible with OMAPL132 or OMAPL131 due to differing peripheral sets, memory maps, and power domains. Voltage rail assignments and thermal pad requirements must be verified against the specific variant's datasheet before substitution.