A new Intel video shows the latest performance results for a high-speed, long-reach (LR) transceiver test chip operating at 116 Gbps with PAM4 modulation. The transceiver test chip, which is built with Intel 10 nm process technology, complies with the highest data rates of the CEI-112G-LR-PAM4 specification. The test chip’s 116 Gbps operation demonstrates the high-speed transceiver design’s added margin for existing 100/200/400 Gigabit Ethernet (GbE) standards and its ability to support emerging protocols and forward error-correction (FEC) standards.
The video also shows the transceiver chip’s transmitter sending a 116 Gbps PRBS31 data pattern to a receiver on the same chip through interconnect and external cabling representing a total insertion loss of greater than 35 dB from BGA ball to BGA ball on the chip. In this test, the transceiver chip’s performance exceeds the CEI-112G-LR-PAM4 specification’s raw bit error ratio (BER) requirement by almost three orders of magnitude even at 116 Gbps, Here’s a screen shot showing the de-embedded PAM4 eye diagram of the transceiver chip’s transmitter operating at 116 Gbps measured with an oscilloscope.
Measured PAM4 Eye Diagram with de-embedding of the I/O Transceiver Chip’s transmitter operating at 116 Gbps
The high-speed, long-reach, digital ADC and DAC based transceiver architecture used for this chip along with a hardened 100/200/400 GbE protocol stack will be incorporated into Intel® Agilex™ I-Series FPGAs, which are optimized for high-speed, bandwidth-intensive networking in Cloud, Enterprise, and Edge applications.
Here’s the 116 Gbps PAM4 Transceiver I/O Chip video:
Notices and Disclaimers
Transceiver TX compliance testing in accordance to Optical Interconnect Forum OIF CEI-112G-LR-PAM4 on Tuesday 3rd March 2020 at 106.25 Gbps, 112 Gbps, and 116 Gbps. Equipment used: Keysight DCA-X Series Wide-Band Oscilloscope N1000A, 85 GHz bandwidth. Intel EV Transceiver Platform, Aim-TTi TGF4162 Dual Channel Arbitrary Function Generator, Agilent E3631A DC Triple Output Power Supply.
Transceiver channel demonstration tested in accordance to OIF CEI-112G-LR-PAM4 specification on Tuesday 3rd March 2020 at 116 Gbps data rate, ysung PRBS31 data pattern >35 dB insertion loss. Equipment used: Intel EV Transceiver Test Chip Platform, Intel QUISI Panel 1A (ISI Channel Board), Aim-TTi TGF4162 Dual Channel Arbitrary Function Generator, Agilent E3631A DC Triple Output Power Supply. 1 m Rosenberger RF cables (x2), 0.3 m Rosenberger RF cables (x2), 67 GHz DC blocks. Ardent Concepts Terminate-R Multicoax assembly plus 6 inch tails (x4).
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