Product details


Datarate (Mbps) 10/100 Interface type MII, RMII Number of ports Single Rating Catalog Features IEEE 1588 PTP, FX support, Cable diagnostics, JTAG1149.1 Supply voltage (Volt) 3.3 IO supply (Typ) (V) 2.5, 3.3 Operating temperature range (C) -40 to 85 Cable length (m) 150 open-in-new Find other Ethernet PHYs

Package | Pins | Size

LQFP (PT) 48 81 mm² 9 x 9 open-in-new Find other Ethernet PHYs


  • IEEE 1588 V1 and V2 Supported
  • UDP/IPv4, UDP/IPv6, and Layer2 Ethernet
    Packets Supported
  • IEEE 1588 Clock Synchronization
  • Timestamp Resolution of 8 ns
  • Allows Sub 10-ns Synchronization to Master
  • 12 IEEE 1588 GPIOs for Trigger or Capture
  • Deterministic, Low Transmit and Receive Latency
  • Selectable Frequency Synchronized Clock Output
  • Dynamic Link Quality Monitoring
  • TDR Based Cable Diagnostic and Cable Length
  • 10/100 Mb/s Packet BIST (Built-in Self Test)
  • Error-Free Operation up to 150 Meters CAT5
  • ESD Protection – 8 kV Human Body Model
  • 2.5-V and 3.3-V I/Os and MAC Interface
  • Auto-MDIX for 10/100 Mbps
  • RMII Rev. 1.2 and MII MAC Interface
  • 25-MHz MDC and MDIO Serial Management Interface
  • IEEE 802.3 100BASE-FX Fiber Interface
  • IEEE 1149.1 JTAG
  • Programmable LED Support for Link, 10/100 Mb/s
    Mode, Duplex, Activity, and Collision Detect
  • Optional 100BASE-TX Fast Link-loss Detection
  • Industrial Temperature Range
  • 48-pin LQFP Package (7 mm × 7 mm)
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The DP83640 Precision PHYTER™ device delivers the highest level of precision clock synchronization for real time industrial connectivity based on the IEEE 1588 standard. The DP83640 has deterministic, low latency and allows choice of microcontroller with no hardware customization required. The integrated 1588 functionality allows system designers the flexibility and precision of a close to the wire timestamp. The three key 1588 features supported by the device are:

  • Packet time stamps for clock synchronization
  • Integrated IEEE 1588 synchronized clock generation
  • Synchronized event triggering and time stamping through GPIO

DP83640 offers innovative diagnostic features unique to Texas Instruments, including dynamic monitoring of link quality during standard operation for fault prediction. These advanced features allow the system designer to implement a fault prediction mechanism to detect and warn of deteriorating and changing link conditions. This single port fast Ethernet transceiver can support both copper and fiber media.

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Technical documentation

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Type Title Date
* Datasheet DP83640 Precision PHYTER™ - IEEE 1588 Precision Time Protocol Transceiver datasheet (Rev. F) Apr. 30, 2015
Technical articles SimpliPHY your Ethernet design, part 1: Ethernet PHY basics and selection process Mar. 11, 2020
Application notes Selection and specification of crystals for Texas Instruments ethernet physical Feb. 06, 2019
Technical articles How to achieve network synchronization clocks with TI digital PLLs Jun. 21, 2018
Technical articles How to implement IEEE 1588 time stamping in an Ethernet transceiver Sep. 28, 2016
Technical articles Fiber in industrial applications Apr. 21, 2016
Application notes AN-1469 PHYTER® Design & Layout Guide (Rev. D) Apr. 26, 2013
Application notes AN-1540 Power Measurement of Ethernet Physical Layer Products (Rev. B) Apr. 26, 2013
Application notes AN-1548 PHYTER 100 Base-TX Reference Clock Jitter Tolerance (Rev. B) Apr. 26, 2013
Application notes AN-1729 DP83640 IEEE 1588 PTP Synchronized Clock Output (Rev. D) Apr. 26, 2013
Application notes AN-1794 Using RMII Master Mode (Rev. A) Apr. 26, 2013
Application notes AN-2006 Synchronizing a DP83640 PTP Master to a GPS Receiver (Rev. A) Apr. 26, 2013
Application notes DP83640 Synchronous Ethernet Mode: Achieving Sub-ns Accuracy in PTP Applications (Rev. A) Apr. 26, 2013
Application notes IEEE 1588 Boundary Clock and Transparent Clock Implementation Using the DP83640 (Rev. A) Apr. 26, 2013
Application notes IEEE 1588 Precision Time Protocol Time Synchronization Performance (Rev. A) Apr. 26, 2013
Application notes IEEE 1588 Synchronization Over Standard Networks Using the DP83640 (Rev. A) Apr. 26, 2013
Application notes Improving Electro-Magnetic Noise Immunity in Serial Communications Systems (Rev. A) Apr. 26, 2013
Application notes Reducing Radiated Emissions in Ethernet 10/100 LAN Applications (Rev. A) Apr. 26, 2013
More literature EMC Test Report Jan. 04, 2013
User guides DP83640T Evaluation Demo Board User Guide Jan. 25, 2012

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Hardware development

document-generic User guide

DP83640 basic product evaluation and customer demonstration board.

Software development

USB to MDIO serial management tool
USB-2-MDIO The USB-2-MDIO software tool lets Texas Instruments' Ethernet PHYs access the MDIO status and device control registers.  The USB-2-MDIO tool includes a LaunchPad™ Development kit for TI's MSP430™ MCUs that is interfaced with a lightweight (...)
  • MDIO bus controller
  • IEEE 802.3 clause 22
  • IEEE 802.3ah clause 22 access to clause 45 registers
Ethernet PHY Linux drivers & tools
ETHERNET-SW The Linux drivers for Texas Instruments' Ethernet physical layer (PHY) transceivers support communication through the serial management interface (MDC/MDIO) to configure and read PHY registers.

The USB-2-MDIO software lets you directly access the registers during debug and prototyping.  (...)

SNLC036.ZIP (4500 KB)
SNLU049.ZIP (4353 KB)
SNLC035.ZIP (0 KB)

Design tools & simulation

SNLM171.ZIP (15 KB) - IBIS Model
SNLM180.ZIP (1 KB) - BSDL Model
SPICE-based analog simulation program
TINA-TI TINA-TI provides all the conventional DC, transient and frequency domain analysis of SPICE and much more. TINA has extensive post-processing capability that allows you to format results the way you want them. Virtual instruments allow you to select input waveforms and probe circuit nodes voltages (...)
document-generic User guide
SNLC037.ZIP (1 KB)

CAD/CAE symbols

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LQFP (PT) 48 View options

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