PAM4

Menlo Micro announced an 80Gbit/s PAM4 loop-back switch for testing asymmetric SerDes busses at IMS 2025, the International Microwave Symposium in San Francisco. “MM5625 delivers over 100 different configurations for the most complex SerDes bus test challenges,” according to the company. It can “support the high-speed differential signal switching required in the latest PCIe Gen 5, Gen 6, and other ...

Diodes has introduced a 64Gtransfer/s PAM-4 intra-equipment range extender for PCIe 6.0 data busses, that is backwards-compatible with PCIe 5.0, 4.0 and 3.0. PI3EQX64904 is a four-differential-channel linear device with equalisation including tunable low and high-frequency and high-frequency zeros. “It optimises performance over a variety of physical media by reducing inter-symbol interference, correcting for known channel losses at the transmitter ...

Imec built a 7bit 150Gsample/s digital to analogue converter using 5nm finfet CMOS. Revealed at the Symposium on VLSI Technology and Circuits in Kyoto, it achieves data rates of up to 300 Gbit/s using PAM-4 modulation, said the Belgian research institute, which is aiming it at data centres. “PAM-4 has emerged as the preferred modulation scheme in data centres, enabling ...

Anritsu has upgraded functions for evaluating PAM4 differential electrical signals in its MP2110A sampling oscilloscope. Signal Processing Software Option-098 supports IEEE 802.3-compliant measurement of 50 to 400G PAM4 optical-module electrical interfaces. “Data centres are currently switching to PAM4 optical modules to cope with increase in communications traffic on mobile networks,” said the company. “In line with the need for easier ...

Anritsu has added forward error correction symbol capture and bathtub test to its 116Gbit/s PAM4 error detector (MU196040B) for developers of 400 and 800Gbit/s Ethernet devices. For use in the company’s MP1900A signal quality analyser, the functions can be downloaded from the MP1900A website. “Data centres are investigating speed upgrades from 100Gbit Ethernet to 400Gbit Ethernet and in future to 800Gbit ...

Molex has expanded its zSFP+ Interconnect System to support 56Gbit/s PAM-4 channels in a stacked 2xN port, aiming at next-generation Ethernet and Fibre Channel applications, and claiming it to be the first of its kind. “The preferential coupling design uses a narrow-edge, coupled, blanked-and-formed contact geometry and insert moulding which provides superior signal integrity and EMI protection,” said the firm. ...

Xilinx, has developed 16nm finfet-based 56G transceiver technology using the 4-level pulse amplitude modulation (PAM4). “PAM4 solutions will help drive the next wave of Ethernet deployment for optical and copper interconnects by doubling bandwidth on the existing infrastructure,” said the firm. The company’s 56G PAM4 transceiver technology has been developed to tackle physical limitations of  data transmission at such line ...