Low-cost analog front-end ICs bring GPON, EPON to the masses

SANTA CLARA, Calif.—PMC-Sierra Inc. is sampling four analog front-end devices (AFEs) that it claims will help OEMs lower the cost of GPON (gigabit passive optical network )and EPON (Ethernet passive optical network ) Fiber-To-The-Home access network equipment that delivers carrier-grade triple-play services—voice, data and IPTV—to consumers worldwide.

“They will enable system OEMs to produce higher-performance systems for IEEE802.3ah EPON, which is widely deployed in Asia, and ITU-T G.984 GPON, which is increasingly popular in North America,” according to Victor Vaisleib, general manager of the FTTH Business Unit at PMC-Sierra, in a statement. “In particular, our GPON AFEs significantly exceed the ITU specifications for burst acquisition timing, sensitivity and dynamic range, and include a built-in diagnostic function, providing for a more robust, yet lower-cost solution than those previously available.”

The GPON devices include the PAS7351 GPON Trans-Impedance Amplifier (TIA) and the PAS7361 GPON Limiting Amplifier (LIA), that together form a Gigabit PON Optical Line Terminal (OLT) burst receiver for use in ITU-T G.984 GPON transceivers.

A GPON transceiver based on the PAS7351/PAS7361 can surpass the requirements for GPON low power and high power Class B+ burst-mode applications, enable a 64-user split ratio at low signal-to-noise environments, and increase network design flexibility.

The devices can provide a signal sensitivity of -33 dBm with a dynamic range of more than 26 dBm. Acquisition time can be as low as 24 bits. Both devices support PIN and avalanche photodiode (APD) receiver applications and include embedded PON diagnostics functions. They use a single 3.3-V power supply and provide for LVCML differential output, either AC- or DC-coupled with direct photodiode input.

The EPON devices include the PAS5351 EPON Trans-Impedance Amplifier (TIA) and the PAS5361 EPON Limiting Amplifier (LIA). Together they form a Gigabit Ethernet PON Optical Line Terminal (OLT) burst receiver that exceeds the IEEE802.3ah Ethernet in the First Mile EPON transceiver standard.

The GPON PAS7351 TIA and the PAS7361 LIA are priced at $25 for the pair in quantities of 10,000 with samples available now. The EPON PAS5351 TIA and the PAS5361 LIA are also priced at $25 for the pair in 10,000 quantities with samples available now. Both TIA devices are available in unpackaged die.

A comprehensive support package, including datasheets and application notes is available at

PMC-Sierra Inc., 1-408-239-8000,

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