Repeater Chip Opens Up InfiniBand Design

Sept. 17, 2001
Sometimes it's the small things that count, especially in networking. For example, in switch fabrics, implementations may need more than just the standard nodes—HCAs, TCAs, and switches. One key part is a repeater, a chip that strengthens and...

Sometimes it's the small things that count, especially in networking. For example, in switch fabrics, implementations may need more than just the standard nodes—HCAs, TCAs, and switches. One key part is a repeater, a chip that strengthens and passes on InfiniBand signals. Primarion fields an InfiniBand repeater that enables designers to extend their signal reach both on the board, within the box, and for linking systems.

The PX5120 Retiming and Repeater chip supports a single 2.5-Gbit/s InfiniBand channel. It delivers a "skip-free" architecture that doesn't consume a packet "skip-bit" in passing through the chip. It consequently has no packet overhead, allowing the packet to keep its two skip-bits for future consumption. No skip-bits are added or deleted in the passage through the repeater.

Chip latency is 30 packet bits (120 ns at a 250-MHz clock). The chip provides independent clock and data recovery for each receive channel. It supports a 125- or 250-MHz differential or single-ended selectable reference clock.

The chip recovers the received clock and data and reregisters the serial data using a PLL-generated reference clock. The data is retransmitted at the received rate. The data rate is unchanged, regardless of how many repeater stages are used in a link path. For diagnostics and test, the chip has a built-in local loop-back path and a JTAG port.

The 2.5-V chip comes in a 196-BGA package. Typical power dissipation is 1.6 W (full duplex). The chips cost $30 each in 1000-unit lots.

Primarion, 2507 W. Geneva Dr., Tempe, AZ 85282; (602) 454-7220; fax (602) 659-4617; www.primarion.com.

Sponsored Recommendations

Board-Mount DC/DC Converters in Medical Applications

March 27, 2024
AC/DC or board-mount DC/DC converters provide power for medical devices. This article explains why isolation might be needed and which safety standards apply.

Use Rugged Multiband Antennas to Solve the Mobile Connectivity Challenge

March 27, 2024
Selecting and using antennas for mobile applications requires attention to electrical, mechanical, and environmental characteristics: TE modules can help.

Out-of-the-box Cellular and Wi-Fi connectivity with AWS IoT ExpressLink

March 27, 2024
This demo shows how to enroll LTE-M and Wi-Fi evaluation boards with AWS IoT Core, set up a Connected Health Solution as well as AWS AT commands and AWS IoT ExpressLink security...

How to Quickly Leverage Bluetooth AoA and AoD for Indoor Logistics Tracking

March 27, 2024
Real-time asset tracking is an important aspect of Industry 4.0. Various technologies are available for deploying Real-Time Location.

Comments

To join the conversation, and become an exclusive member of Electronic Design, create an account today!