Texas Instruments OMAPL137BZKBA3

Overview

OMAPL137BZKBA3 from Texas Instruments is a dual-core low-power applications processor integrating a 456-MHz ARM926EJ-S RISC MPU and a 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 resource-constrained embedded systems.

For engineers reviewing the OMAPL137BZKBA3 datasheet, OMAPL137BZKBA3 pinout, OMAPL137BZKBA3 application, or OMAPL137BZKBA3 equivalent, key selection criteria include dual-core clock synchronization, EMAC + McASP + eHRPWM peripheral integration, 256-ball PBGA package compatibility, and industrial temperature support (–40°C to 105°C).

Technical Context

The OMAPL137BZKBA3 implements tightly coupled ARM926EJ-S and C674x cores sharing memory via a configurable 128KB RAM and unified 256KB L2 space, enabling concurrent OS-driven control (ARM) and deterministic signal processing (DSP). Its memory subsystem includes separate 16KB I/D caches per core, 8KB ARM vector RAM, and 64KB ROM for boot.

Peripheral interconnect uses a hierarchical bus architecture: AHB for ARM subsystem access, EDMA3 for zero-CPU-overhead data movement across McASPs, EMAC, USB, and external memories (EMIFA/EMIFB), while PRUSS provides real-time I/O offload independent of both CPUs.

Key Specifications

Pinout & Package

OMAPL137BZKBA3 is housed in a 256-ball Pb-free plastic BGA (ZKB suffix) with 1.0-mm ball pitch and 17.0 mm × 17.0 mm body size. Pin functions are multiplexed across 8 GPIO banks (16 pins each), McASP, EMAC, USB, and memory interface signals; full assignment requires reference to TI's SPRS563G Section 3.6 (Pin Assignments) and Section 3.7 (Terminal Functions).

Key Features

Applications

Equivalent & Alternatives

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

Compared with OMAPL137BZKBA3, OMAPL138BZKBA3 extends shared memory and PRU resources for deeper audio buffering and deterministic I/O, while TMS320DM8148ZCEA adds video acceleration and higher clocks at increased power and complexity - making OMAPL137BZKBA3 the most balanced choice for cost-sensitive, thermally constrained audio processors.

Availability

OMAPL137BZKBA3 is available at Aetrix Electronics and suitable for A/V receivers, home theatre systems, and automotive amplifiers requiring stable component supply across industrial temperature ranges (–40°C to 105°C) and long product lifecycles.

Supply support for OMAPL137BZKBA3 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, designing and manufacturing analog, embedded processing, and wireless chips for industrial, automotive, and consumer markets.

OMAPL137BZKBA3 belongs to TI's OMAP-L13x low-power applications processor family, engineered specifically for audio/video edge devices needing integrated DSP+ARM compute, rich peripheral sets, and thermal efficiency in compact form factors.

FAQ

What is the maximum operating frequency of the OMAPL137BZKBA3 and what voltage is required?

The OMAPL137BZKBA3 operates at up to 456 MHz for both the ARM926EJ-S and C674x cores when supplied with 1.3 V to the CVDD rail. At 1.2 V, the maximum frequency is 375 MHz. These ratings are validated across the industrial temperature range (–40°C to 105°C) and documented in Section 3.1 of the SPRS563G datasheet.

Does the OMAPL137BZKBA3 support Ethernet connectivity, and if so, what interface standard does it implement?

Yes, the OMAPL137BZKBA3 integrates a 10/100 Mbps Ethernet Media Access Controller (EMAC) compliant with IEEE 802.3 and supporting RMII physical layer interface. It includes an integrated MDIO module for PHY configuration and operates exclusively with 3.3-V I/Os - no external PHY transceiver is required beyond standard magnetics and termination.

How many McASP interfaces does the OMAPL137BZKBA3 provide, and what audio protocols are supported?

The OMAPL137BZKBA3 features three multichannel audio serial ports (McASP0–McASP2), each with up to 28 serializers and dedicated transmit/receive FIFOs. They support TDM, I2S, and similar formats natively; McASP2 additionally supports Digital Interface Transmitter (DIT) mode for S/PDIF output - enabling direct connection to DACs, ADCs, and digital audio transceivers.

What is the role of the PRUSS in the OMAPL137BZKBA3, and how is it utilized in audio applications?

The Programmable Real-Time Unit Subsystem (PRUSS) in the OMAPL137BZKBA3 consists of two independent 32-bit RISC cores with 4KB instruction RAM and 512 bytes data RAM each. In audio applications, PRUSS handles time-critical tasks such as eHRPWM dead-band control, GPIO-based amplifier mute sequencing, or custom protocol parsing - offloading these from the ARM and DSP to guarantee deterministic response under heavy system load.

Is the OMAPL137BZKBA3 pin-compatible with other members of the OMAP-L13x family, and which variants share the same ZKB package?

Yes, the OMAPL137BZKBA3 is pin-compatible with OMAPL138BZKBA3 in the 256-ball ZKB PBGA package. Both share identical mechanical dimensions, ball pitch, and signal mapping per TI's packaging documentation (SPRS563G Section 8.2). This allows drop-in replacement where increased L2 RAM or PRU resources are needed without PCB redesign.