Texas Instruments DP83822IFRHBT

Overview

DP83822IFRHBT from Texas Instruments is a robust, low-power 10/100Mbps Ethernet physical layer transceiver designed for industrial environments. It supports IEEE 802.3u (100BASE-TX/100BASE-FX/10BASE-Te), operates from –40°C to +85°C, and delivers <220mW power at 3.3V AVD. Its RGMII/RMII/MII MAC interface and integrated cable diagnostics enable reliable connectivity in motor drives and Profinet systems.

For engineers reviewing the DP83822IFRHBT datasheet, DP83822IFRHBT pinout, DP83822IFRHBT application, or DP83822IFRHBT equivalent, this page provides verified technical context, real-world timing behavior, ESD-hardened PMD interface specs, and validated alternative options for industrial Ethernet PHY selection.

Technical Context

The DP83822IFRHBT implements a fully compliant IEEE 802.3u PHY with automatic media detection for 10BASE-Te, 100BASE-TX, and 100BASE-FX modes. Its differential TD_P/TD_M and RD_P/RD_M pins support programmable swing (1.0 V_pk-pk typ. for 100BASE-TX) and meet IEC 61000-4-2 ±8 kV contact ESD on PMD pins.

It integrates start-of-frame detection for IEEE 1588 timestamping, rapid link-down detection (<100 ms), and auto-MDIX in forced modes. The device uses a single 32-pin VQFN package with configurable I/O voltage (1.8V/2.5V/3.3V) and dual supply domains (AVD and VDDIO), enabling flexible integration with industrial SoCs and microcontrollers.

Key Specifications

Pinout & Package

DP83822IFRHBT is housed in a 32-pin, 5.00 mm × 5.00 mm VQFN (RHB) package with exposed thermal pad. Pin functions are validated per TI SNLS505H Rev. H datasheet, including dedicated PMD, MAC, management, clock, and LED/GPIO terminals.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 10/100Mbps Ethernet PHY applications.

Compared with DP83822H and LAN8720A, the DP83822IFRHBT uniquely combines 100BASE-FX capability, RGMII support, and ±8 kV IEC ESD protection in a single industrial-qualified package - making it optimal for Profinet, EtherCAT, and fiber-linked grid infrastructure nodes.

Availability

DP83822IFRHBT is available at Aetrix Electronics and suitable for motor drives, factory automation, grid infrastructure, and building automation requiring stable component supply across extended temperature and EMI-prone conditions.

Supply support for DP83822IFRHBT 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 leader specializing in analog, embedded processing, and connectivity solutions for industrial, automotive, and communications markets.

The DP83822IFRHBT belongs to TI's industrial Ethernet PHY product line, engineered specifically for deterministic, noise-immune wired connectivity in harsh environments - with emphasis on ESD resilience, wide temperature operation, and seamless MAC integration.

FAQ

What is the operating temperature range for DP83822IFRHBT?

The DP83822IFRHBT is rated for –40°C to +85°C ambient operation, matching the DP83822IF variant specification. This range supports deployment in industrial control panels, HVAC units, and distributed I/O modules without active cooling. It differs from the DP83822H/DP83822HF variants, which extend to +125°C but omit 100BASE-FX capability. Thermal performance is validated per RθJA = 41.0°C/W in the 5 mm × 5 mm VQFN package.

Does DP83822IFRHBT support fiber optic interfaces?

Yes, DP83822IFRHBT supports 100BASE-FX via its RD_P/RD_M and TD_P/TD_M differential pins. It delivers 0.9–1.1 V_pk-pk differential output swing and accepts 0.22–1.8 V_pk-pk input, meeting IEEE 802.3u FX requirements. When used with an external SFP or media converter, it enables fiber links up to 2 km. This capability distinguishes DP83822IFRHBT from non-FX variants like DP83822H and DP83822I.

What MAC interfaces does DP83822IFRHBT support?

DP83822IFRHBT supports three parallel MAC interfaces: RGMII, RMII, and MII. RGMII is configured via strap pins or register writes and offers sub-2 ns input skew tolerance. RMII uses a 50 MHz reference clock and shares pins with MII functions. All interfaces are electrically isolated from the PMD side and support independent I/O voltage selection (1.8V/2.5V/3.3V), allowing direct connection to diverse host processors without level shifters.

How does DP83822IFRHBT implement Energy Efficient Ethernet (EEE)?

DP83822IFRHBT implements IEEE 802.3az-compliant EEE by entering a low-power idle (LPI) state during packet inter-arrival gaps. LPI entry/exit is triggered via MAC-side signaling on the TX_EN/RX_DV lines, and the PHY maintains link synchronization without retraining. Power reduction exceeds 50% versus active transmission, validated at <220 mW (3.3V AVD) and <120 mW (1.8V AVD). EEE behavior is configurable via MDIO register 0x0014.

Can DP83822IFRHBT perform cable diagnostics without host intervention?

Yes, DP83822IFRHBT includes autonomous cable diagnostics that operate independently of the host processor. Using time-domain reflectometry principles, it identifies open circuits, shorts, and impedance mismatches up to 150 meters. Results are reported via MDIO registers (0x001B–0x001E) and can be initiated by writing to register 0x001A. No external test equipment or firmware driver is required - enabling field serviceability and automated pre-deployment validation of DP83822IFRHBT-based nodes.