Semtech adds combo chip, TIA to FiberEdge line for 10G-EPON OLTs

Semtech Corp. (NASDAQ:SMTC) has added the GN7154 combo chip and the GN7056 transimpedance amplifier (TIA) for 10G-EPON optical line terminals (OLTs) to its FiberEdge line.

Semtech Corp. (NASDAQ:SMTC) has added the GN7154 combo chip and the GN7056 transimpedance amplifier (TIA) for 10G-EPON optical line terminals (OLTs) to its FiberEdge line.

The bidirectional GN7154 will support 1G and 10G-EPON OLT designs. The transmit data path leverages Semtech’s 10G EML driver with ClearEdge CDR referenceless technology to reset the path jitter budget. Use of an I2C programmable PLL loop bandwidth control and a variety of jitter filter modes enables Tx path optimization. The EML driver includes eye-shaping features and an automatic power control loop. The burst mode receive data path includes two separate limiting amplifiers, one for 1G EPON and the other for 10G-EPON, with a fast burst mode signal detect function. The Rx path outputs 10G data at CML levels, while the 1G Rx output is available at CML or LVPECL levels depending on the device version.

The GN7056 burst mode TIA features a fast automatic gain control loop to enable high dynamic range in burst mode applications. The GN7056 is offered in die form, supports industrial temperature range, and uses a single 3.3-V power supply.

“The upsurge in the 10G-EPON market is expected to continue and we believe these products will help drive this growth,” said Dr. Timothy Vang, vice president of marketing and applications for Semtech’s Signal Integrity Products Group. “Our engineering team has produced another unique chipset that delivers higher performance and enables lower manufacturing costs through further integration.”

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