Industry’s First Ethernet Transceiver with IEEE-1588- PTP-Hardware-Support Delivers Outstanding Clock Accuracy

National Semiconductor introduced the industry’s first Ethernet transceiver with integrated hardware support for the IEEE-1588- Precision-Time-Protocol (PTP). The DP83640 precision PHYTER^® transceiver synchronizes the distributed network nodes to a master clock with 8-nanosecond accuracy.

The DP83640 precision PHYTER transceiver integrates hardware time stamping of receive and transmit packets, a high-accuracy IEEE 1588 clock and 12 general-purpose input/output (GPIO) pins that handle simultaneous real-time events or multiple triggers. The DP83640 interfaces with any microcontroller, FPGA)or ASIC with an Ethernet media access controller (MAC).

Unlike existing software or customized hardware implementations, the DP83640 integrates the IEEE 1588 PTP functionality in the physical layer. It records the timestamps as close to the wire as possible, with an 8 ns resolution, to yield the highest accuracy for precision control and the lowest jitter for data acquisition.
By using one of four clock update algorithms the user adjusts the on-board PTP clock to 1-part-per-billion (ppb) accuracy. In addition, a high-precision frequency-controlled oscillator generates a low-jitter, selectable-frequency clock output from the PTP clock.
The transceiver also synchronizes the GPIOs directly with the timestamp engine and the PTP clock to extend this accuracy throughout the real-time system.

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The DP83640 is available in LQFP 48.


For more information please contact your local SPOERLE Branch Office.