Semtech offers XGS-PON OLT chipset

The company is showing of the GN7153B combo chip and the GN7055B multi-rate burst mode transimpedance amplifier (TIA) for XGS-PON optical line terminals (OLTs) at CIOE 2019.

Xgspon Chipset Press 4800x2700
BusinessWire

Semtech Corp. (NASDAQ: SMTC) is using CIOE 2019 in Shenzhen, China, this week to launch what it asserts is the first XGS-PON merchant silicon chipset. The company is showing of the GN7153B combo chip and the GN7055B multi-rate burst mode transimpedance amplifier (TIA) for XGS-PON optical line terminals (OLTs).

The GN7153B supports OLT transmit and receive signals in a fully integrated fashion. On the receive end, the GN7153B supports both XG-PON (2.5G) and XG-SPON (2.5G/10G) signals; on the transmit side, the device leverages Semtech’s 10G EML driver with ClearEdge CDR technology to reset the signal jitter budget. An I2C programmable PLL loop bandwidth control and a variety of jitter filter modes enable transmit path optimization. The EML driver includes eye-shaping features and an automatic power control (APC) loop to enable what Semtech asserts is best-in-class transmit eye quality. The burst mode receive data path includes a multi-rate 2.5G/10G limiting amplifier with a fast burst mode signal detect function, integrated discharge circuit, and reset for short settling time.

Meanwhile, the GN7055B burst-mode TIA uses an external reset signal to meet the convergence time and burst dynamic range requirements of XGS-PON 2.5G and 10G transmissions. The device features a fast automatic gain control (AGC) loop to enable high dynamic range in burst mode applications. The GN7055B is offered in die form, supports industrial temperature range, and uses a single 3.3-V power supply, according to the company.

“XGS-PON will bring a new generation of faster optical broadband services for home and business to the largest sector of the PON market,” said Dr. Timothy Vang, vice president of marketing and applications for Semtech’s Signal Integrity Products Group. “Our chipset contributes to that growth by bringing high performance and low cost.”

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