Texas Instruments DP83867IRRGZT

Overview

DP83867IRRGZT from Texas Instruments is an industrial-grade 10/100/1000BASE-T Ethernet PHY transceiver in a 48-pin VQFN package, supporting RGMII MAC interface, delivering ultra-low RGMII latency (TX < 90 ns, RX < 290 ns), 457 mW full-power operation, and 8 kV IEC 61000-4-2 ESD protection on MDI pins - deployed in motor drives and industrial factory automation for deterministic TSN-compliant networking.

For engineers reviewing the DP83867IRRGZT datasheet, DP83867IRRGZT pinout, DP83867IRRGZT application, or DP83867IRRGZT equivalent, key selection criteria include RGMII timing skew (1–2.6 ns RX input skew), configurable I/O voltage (1.8/2.5/3.3 V), IEEE 1588 Start-of-Frame detection, and industrial temperature range (–40°C to +85°C) with integrated MDI termination resistors.

Technical Context

The DP83867IRRGZT implements a fully compliant IEEE 802.3 10BASE-Te/100BASE-TX/1000BASE-T physical layer with integrated PMD sublayers and transformer-coupled RJ-45 interface. It supports synchronous Ethernet via 25 MHz or 125 MHz CLK_OUT and provides hardware-based Start-of-Frame detection for IEEE 1588 timestamping accuracy.

RGMII interface timing is precisely controlled with programmable RX/TX delay modes (16 settings), differential MDI signaling across four twisted-pair lanes (TD_P_A/M_A through TD_P_D/M_D), and JTAG debug support. Its low-latency datapath and robust ESD immunity (±8 kV HBM on MDI pins) are optimized for real-time industrial Ethernet applications requiring deterministic jitter performance and cable diagnostics.

Key Specifications

Pinout & Package

VQFN-48 (RGZ) package, 7 mm × 7 mm, exposed thermal pad (DAP = GND), 0.4 mm pitch.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar Ethernet PHY applications.

Compared with DP83867IRPAP and KSZ9031RNXIA, the DP83867IRRGZT uniquely combines industrial temperature range, ±8 kV MDI ESD, RGMII-optimized low latency, and hardware IEEE 1588 Start-of-Frame detection - making it the preferred choice for deterministic industrial Ethernet nodes where reliability and timing precision are critical.

Availability

DP83867IRRGZT is available at Aetrix Electronics and suitable for industrial motor drives, factory automation controllers, and fieldbus gateway devices requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for DP83867IRRGZT 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 specializing in analog, embedded processing, and connectivity technologies, with leadership in industrial and automotive electronics.

The DP83867IRRGZT belongs to TI's industrial Ethernet PHY product line, engineered specifically for robust, low-latency, TSN-ready communication in harsh electromagnetic environments - targeting motor control, PLCs, and real-time automation infrastructure.

FAQ

What is the maximum RGMII input timing skew specification for DP83867IRRGZT?

The DP83867IRRGZT specifies RGMII RX input skew (TskewR) of 1–2.6 ns under recommended operating conditions. This parameter defines the allowable timing misalignment between RX_CLK and RX_D[3:0] signals at the PHY input, ensuring reliable data capture in high-speed industrial Ethernet links. The value is measured at the device pin and must be met by the MAC-side layout to guarantee functional 1000BASE-T operation. DP83867IRRGZT does not require external delay compensation due to its built-in 16-mode RGMII delay tuning capability.

Does DP83867IRRGZT support IEEE 1588 Precision Time Protocol hardware timestamping?

Yes, DP83867IRRGZT provides hardware-accelerated IEEE 1588 Start-of-Frame (SOF) detection, enabling precise packet boundary identification for downstream timestamping in the MAC or application layer. While the PHY itself does not generate timestamps, its SOF signal reduces software overhead and jitter in time-aware systems. This feature is integral to DP83867IRRGZT's TSN compliance and is validated across its full industrial temperature range (–40°C to +85°C).

What power supply configurations does DP83867IRRGZT support?

DP83867IRRGZT requires three regulated supplies: VDD1P0 (1.0 V ±15.5%/–5%), VDDA1P8 (1.8 V ±5%), VDDA2P5 (2.5 V ±5%), and configurable VDDIO (1.8/2.5/3.3 V ±5%). The 1.0 V core rail powers digital logic, while analog rails condition MDI and RGMII interfaces. Power consumption is 457 mW at 1000BASE-T with all supplies active. DP83867IRRGZT supports optional 2-supply operation (omitting VDDA1P8) to reduce complexity, though full-spec performance requires all rails.

Can DP83867IRRGZT operate without an external crystal?

No - DP83867IRRGZT requires a 25 MHz fundamental-mode crystal or oscillator connected between XI and XO pins for base clock generation. The device uses this reference to synthesize internal PLL clocks for 10/100/1000 Mbps operation and generate the 25 MHz or 125 MHz CLK_OUT signal. An external clock source is mandatory; no internal RC oscillator is provided. Crystal tolerance must be ≤50 ppm, and XO must be left floating when using a single-ended oscillator.

How is ESD protection implemented on the MDI pins of DP83867IRRGZT?

DP83867IRRGZT achieves ±8 kV IEC 61000-4-2 contact discharge protection on all eight MDI pins (TD_P_A/M_A through TD_P_D/M_D) via on-die robust clamping structures, verified per international EMC standards. This level exceeds typical industrial requirements and eliminates the need for external TVS diodes in most deployments. Protection is inherent to the silicon process and does not rely on external components - confirmed in TI's production test and characterization data for DP83867IRRGZT across its full temperature range.