Ethernet transceiver supports IEEE 1588 precision time protocol - Embedded.com

Ethernet transceiver supports IEEE 1588 precision time protocol

Santa Clara, Calif.—National Semiconductor Corp. is touting its latest interface product as the industry's first Ethernet transceiver with integrated hardware support for the IEEE 1588 Precision Time Protocol (PTP).

For applications in motion control, instrumentation, data acquisition and telecommunications, the DP83640 precision PHYTER transceiver synchronizes the distributed network nodes to a master clock with 8-ns accuracy.

National's 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).

The DP83640 integrates the IEEE 1588 PTP functionality in the physical layer. It records the timestamps as close to the wire as possible, to yield what National claims is 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.

Pricing: $5.24 each in 1,000-unit quantities.
Availability: Now in a 48-pin LQFP.
Datasheet: click here.

National Semiconductor Corp., 1-800-272-9959, www.national.com

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