NXP Semiconductors LS1043AXN8KQB

Overview

LS1043AXN8KQB from NXP Semiconductors is a quad-core 64-bit ARM Cortex-A53 communications processor with 1 MB L2 cache, integrated Frame Manager, DPAA 2.0 acceleration, and SEC 5.4 security engine, deployed in branch office routers and industrial PLCs requiring deterministic packet processing and hardware-accelerated IPsec.

For engineers reviewing the LS1043AXN8KQB datasheet, LS1043AXN8KQB pinout, LS1043AXN8KQB application, or LS1043AXN8KQB equivalent, key selection criteria include DDR4/DDR3L memory support, 6× Gigabit Ethernet with IEEE 1588, 3× PCIe Gen2, and QUICC Engine legacy protocol offload capability.

Technical Context

The LS1043AXN8KQB implements four ARM Cortex-A53 cores at up to 1.6 GHz with CoreLink CCI-400 interconnect and SMMU for virtualized I/O memory management. It integrates DPAA 2.0 accelerators including Frame Manager for hardware parsing/classification and Queue Manager for traffic scheduling.

Networking interfaces are anchored by a 4-lane 10 GHz SerDes supporting up to six 1 GbE ports (with IEEE 1588), three PCIe Gen2 links, one SATA 3.0, and triple USB 3.0 with PHY. Security is handled by SEC 5.4 supporting IPsec, SSL/TLS, DTLS, IKE, and XOR acceleration for RAID 5.

Key Specifications

Pinout & Package

LS1043AXN8KQB is housed in a 23 mm × 23 mm, 780-pin FC-BGA package (RoHS-compliant, Pb-free). Pin assignment follows the LS1043A Reference Manual Rev. 6, with dedicated ball groups for DDR4, SerDes, PCIe, USB, and QUICC Engine signals.

Key Features

Applications

Equivalent & Alternatives

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

Compared with LS1043AXN8KQB, LS1046AXN8KQB delivers higher per-core IPC and bandwidth but requires active cooling, while LS1023AXN7KQB retains full software and pin compatibility at lower performance and power - making it a scalable entry point within the LS series.

Availability

LS1043AXN8KQB is available at Aetrix Electronics and suitable for branch office routers, industrial PLCs, and vCPE gateways requiring stable component supply, long-term lifecycle assurance, and qualified industrial temperature grade (-40°C to +105°C).

Supply support for LS1043AXN8KQB 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 specializing in secure connectivity solutions for automotive, industrial, and networking markets, with deep expertise in ARM-based SoCs and hardware acceleration architectures.

The LS1043A belongs to NXP's Layerscape family of communications processors, designed specifically for fanless, small-form-factor edge infrastructure requiring integrated networking, security, and real-time control in a single die.

FAQ

What is the maximum operating temperature rating for LS1043AXN8KQB?

The LS1043AXN8KQB is rated for industrial temperature operation from –40°C to +105°C ambient, validated per JEDEC JESD22-A104. This rating applies to the full 780-ball FC-BGA package and supports deployment in unventilated enclosures such as DIN-rail PLC cabinets and outdoor telecom cabinets.

Does LS1043AXN8KQB support DDR4 memory boot sequences?

Yes, LS1043AXN8KQB supports booting directly from DDR4 memory when configured with appropriate RCW settings and compatible DDR4 SDRAM initialization sequence. The integrated 32-bit DDR4 controller supports LPDDR4 and DDR4-1600, and boot firmware can be loaded from QuadSPI or IFC NAND before initializing DDR4.

Is LS1043AXN8KQB pin-compatible with LS1023AXN7KQB?

Yes, LS1043AXN8KQB and LS1023AXN7KQB share identical 780-ball FC-BGA mechanical footprint, ball map, and power/ground pin assignments. This enables direct PCB reuse between dual-core and quad-core variants, provided thermal and power delivery design margins accommodate the higher LS1043A current draw.

What security protocols does the SEC 5.4 engine in LS1043AXN8KQB accelerate?

The SEC 5.4 engine in LS1043AXN8KQB accelerates IPsec ESP/AH, SSL/TLS 1.2, DTLS 1.2, IKEv1/v2, and RSA/ECC digital signatures. It also provides high-speed XOR acceleration for RAID 5 parity calculation and CRC-32/CRC-16 checksum generation for packet integrity verification.

Can LS1043AXN8KQB operate without an external clock source for SerDes lanes?

No, LS1043AXN8KQB requires an external 100 MHz differential reference clock applied to the SERDES_REFCLK pin to initialize and maintain SerDes lane lock. The internal PLL synthesizes 1.25 GHz, 2.5 GHz, or 5 GHz SerDes rates from this reference; no crystal oscillator is integrated on-die for SerDes.