Lantiq AN983X-AH-T-21

Overview

AN983X-AH-T-21 from Infineon Technologies is a PCI-to-Ethernet LAN bridge controller IC implementing IEEE 802.3 10/100BASE-TX MAC and PHY in a single device, supporting 32-bit 33 MHz PCI interface, integrated 10/100 Mbps transceiver, and MII/RMII interface options for external PHY extension. It enables legacy PCI-based systems to add Ethernet connectivity in industrial control panels.

For engineers reviewing the AN983X-AH-T-21 datasheet, AN983X-AH-T-21 pinout, AN983X-AH-T-21 application, or AN983X-AH-T-21 equivalent, key selection criteria include PCI bus timing compliance, integrated PHY power consumption (1.4 W typical), MII/RMII configurability, and 128-pin QFP thermal performance under sustained packet throughput.

Technical Context

This device integrates a PCI target interface with configurable BARs and latency timer, a full-duplex 10/100 Mbps MAC with IEEE 802.3x flow control, and a mixed-signal PHY with on-chip termination resistors and adaptive equalization for Category 5 UTP. It supports both big-endian and little-endian host configurations.

The AN983X-AH-T-21 implements internal DMA with scatter-gather support, programmable interrupt coalescing, and EEPROM-less operation via strap pins or host initialization. Its register map includes dedicated MII management access and PHY status monitoring registers accessible over PCI configuration space.

Key Specifications

Pinout & Package

128-pin plastic quad flat pack (QFP) with 0.4 mm pitch, 20 mm × 20 mm body, exposed thermal pad (EP), JEDEC MO-140 standard, RoHS-compliant lead finish.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar PCI-to-Ethernet bridge applications.

Compared with Intel 82559ER and Realtek RTL8139D, the AN983X-AH-T-21 delivers higher integration (eliminating 5+ passives and 1 IC), guaranteed industrial temperature operation, and flexible MII/RMII interface routing - critical for space-constrained, thermally demanding, or field-upgradable systems.

Availability

AN983X-AH-T-21 is available at Aetrix Electronics and suitable for industrial PLC gateways, medical imaging devices, and avionics data recorders requiring stable component supply and long lifecycle support.

Supply support for AN983X-AH-T-21 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

Infineon Technologies is a German semiconductor manufacturer specializing in power management, automotive microcontrollers, and industrial connectivity solutions, with global R&D centers and ISO/TS 16949-certified fabs.

The AN983X product line targets high-reliability embedded bridging applications, specifically designed to replace multi-chip PCI-to-Ethernet implementations in safety-critical and thermally constrained environments.

FAQ

Does AN983X-AH-T-21 support PCI Express?

No. The AN983X-AH-T-21 implements only PCI Local Bus Specification Rev 2.2 (32-bit, 33 MHz). It does not include PCIe root complex or endpoint logic, nor does it support lane enumeration, LTSSM, or PCIe configuration space extensions. Migration to PCIe requires redesign with a dedicated PCIe-to-Ethernet controller such as Infineon's XMC4000-based gateway SoCs.

Can the integrated PHY drive 100BASE-TX over 100 m of Cat 5e cable?

Yes. The integrated PHY meets IEEE 802.3u specifications for 100BASE-TX, including output amplitude (2.2 Vpp differential), rise/fall times (<30 ns), and jitter (<1.5 UI peak-to-peak). Validated operation over 100 m of Category 5e UTP has been confirmed per TIA/EIA-568-B.2 with ≤12 dB insertion loss at 31.25 MHz.

Is EEPROM mandatory for MAC address storage?

No. The AN983X-AH-T-21 supports EEPROM-less operation via strap pins (STRAP0–STRAP5) that configure default MAC address bits, PHY reset polarity, and MII/RMII mode. EEPROM is optional and used only if dynamic MAC address assignment or extended PHY configuration is required.

What thermal management is required for continuous 100 Mbps operation?

At 100 Mbps full-duplex line rate, the AN983X-AH-T-21 dissipates 1.4 W. A 4-layer PCB with ≥2 oz copper, thermal vias under the exposed pad (≥12 vias, 0.3 mm diameter), and 200 cm² heatsink surface achieves ≤75 °C junction temperature at 85 °C ambient. No forced airflow is required below 70 °C ambient.