Part Number: DP83867IRPAPR

Manufacturer: Texas Instruments


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DP83867IRPAPR Introduction

The DP83867IRPAPR is a Physical Layer Transceiver (PHY) for 10/100/1000Mbps Ethernet with much integration. Texas Instruments make this chip. It is widely used in Ethernet applications because it is durable, reliable, and uses little power. This manual will talk about the DP83867IRPAPR, including what it is, how it works, and what it can be used for.

DP83867IRPAPR Description

The DP83867 is an efficient Physical Layer transceiver that supports 10BASE-Te, 100BASE-TX, and 1000BASE-T Ethernet standards with built-in PMD sublayers. The DP83867 is IEC 61000-4-2 ESD certified at levels higher than 8 kV. (direct contact). With the DP83867, setting up a 10/100/1000 Mbps Ethernet LAN couldn’t be simpler. Using a separate transformer, it connects directly to twisted pair media.

The Media Access Control (MAC) layer is reached directly by this gadget via the Media Independent Interface (MII), Gigabit Media Independent Interface (GMII), or Reduced GMII defined by IEEE 802.3. (RGMII). While the QFN package only supports RGMII, the QFP package is compatible with MII, GMII, and RGMII. The DP83867 can synchronize clocks precisely and even has a synchronous Ethernet clock output. The IEEE 1588 Start of Frame Detection is supported, and the latency is very low. During full load, the DP83867 only uses 490 mW (PAP) or 457 mW (RGZ) of power. Reduce your computer’s power consumption by using wake on LAN.

DP83867IRPAPR Features

  • Very Low Latency in RGMII TX 90ns, RX 290ns.
  • Compatible with TSN, or the Time-Critical Network.
  • The 457 mW power needed is minimal.
  • IEC 61000-4-2 ESD protection levels exceeded.
  • Class B emission criteria as defined by EN55011.
  • There are 16 configurable RGMII delay options for reception and transmission.
  • Resistors for terminating MDI signals are built in.
  • Adjustable termination impedance for MII, GMII, and RGMII.
  • detection of WoL (Wake-on-LAN) packets.
  • Synchronized clock output at either 25 MHz or 125 MHz.
  • Identifying the beginning of an IEEE 1588-timestamped frame.
  • Inverted RJ45.
  • All standards of the IEEE 802.3 family (10BASE-Te, 100BASE-TX, and 1000BASE-T) are fully supported.

Detailed Description

The DP83867 is a full-featured Physical Layer transceiver with built-in PMD sub-layers that works with 10BASETe, 100BASE-TX, and 1000BASE-T Ethernet protocols. With the DP83867, setting up a 10/100/1000 Mbps Ethernet LAN is easy. It connects directly to twisted pair media with the help of a separate transformer. This device can connect to the MAC layer using either IEEE 802.3u Standard Media Independent Interface, IEEE 802.3z Gigabit Media Independent Interface, or Reduced Gigabit Media Independent Interface

The DP83867 can synchronize clocks accurately and has a synchronized Ethernet clock output. The IEEE 1588 Start of Frame Detection is used for protocols that can’t handle even the smallest delay. Modern diagnostic features of the DP83867 include a dynamic link quality monitor that can spot problems before they happen. It can work with cables that are up to 130 meters long.

Feature Description

● WoL (Wake-on-LAN) Packet Detection

Wake-on-LAN and a special type of Ethernet packet called a Magic Packet can get the DP83867 out of its power-saving mode. The DP83867 can wake up the MAC if a packet meets certain conditions. You can also set up your system so that a GPIO sends a signal when certain inputs come in.

● Determinism and SFD Latency Variation

The RX CTRL and TX CTRL signals in RGMII can’t be used by protocols that care about latency to accurately time stamp when packets are sent and received. With SFD pulses, system designers can better understand when a packet was sent. The T’s in the 1000BASE architecture cause SFD pulse latency to vary, but not as much as RGMII signal latency. Here, we’ll talk about the steps needed to find and fix SFD latency differences in the system software so that timestamps are more accurate. In this part, SFD variance and baseline latency are used.

Assuming that all 4 pairs of an Ethernet connection have the same propagation time, the baseline latency is when an SFD pulse is sent and when it is received on a linked link partner. If all 4 pairs are the same, a 1000BASE-T PHY won’t have to align the symbols it gets over the wire. This will not slow things down.

Master Mode 1000 MB Divergence in SFD In 1000-Mb master mode, bit[7:4 of the DP83867’s Skew FIFO Status register (register address 0x0055) can be used to estimate the RX SFD pulse fluctuation. Multiply the value in the Skew FIFO Status register bit[7:4] by 8 ns to estimate the RX SFD variance beyond the baseline delay. In Master 1000-Mb mode, for example, bit[7:4] of the Skew FIFO register is read as 0x2. To get the baseline latency when comparing TX SFD and RX SFD, take away 2 * 8 = 16 ns.

● Clock Output

The DP83867 has a local reference clock, an Ethernet send clock, and an Ethernet receives clock. Crystals or oscillators from the outside set off local reference clocks. The local reference clock is the time source for all devices. The receiver node determines the local reference time by looking at the network packets sent. From the Ethernet packet data stream, the receive clock is locked to the send clock of the partner. With the I/O Configuration register, the DP83867 can send internal clocks out through the CLK OUT pin (address 0x0170). By default, the XI oscillator or crystal input syncs the output clock.

At 125 or 25 MHz, registers can sync the output clock to the data coming in. It may also send out a line driver transmit clock. For 1000Base-T, the output clock can be set on any of the four send or receive channels. The output clock is turned off with CLK O DISABLE in the I/O Configuration register. Clock Out Disable strap disables it by default.


In conclusion, the DP83867IRPAPR is a top-of-the-line Ethernet PHY that can be used in many Ethernet applications. Its advanced features, such as cable diagnostic testing, auto-negotiation, and auto-MDIX, along with its low power consumption and support for Wake-on-LAN, make it a reliable and flexible choice for embedded computing and other low-power applications. At ICRFQ, we work hard to offer high-quality electronic parts at prices that most people can afford. Please don’t hesitate to contact us to learn more about the DP83867IRPAPR or place an order. We are always glad to be of service.

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