Santa Clara, Calif. National Semiconductor Corp. has introduced two power-saver passive equalizers that double the data transmission reach of FR-4 backplanes. The DS38EP100 can equalize 40 inches of FR-4 printed-circuit-board (PCB) at a data transmission rate of 3.125 Gbits/s, which is twice the reach of other passive equalizers, and the DS80EP100 can equalize 20 inches of FR-4 at 10 Gbits/s.
In addition to doubling the reach of FR-4, the DS38EP100 can equalize up to five meters of 28 AWG HDMI cable at a data rate of 3.4 Gbits/s. It features 7 dB of maximum boost and its input and output impedance is 100 ohms. The DS38EP100 supports all data coding techniques such as 8b/10b and scrambled signals. The DS80EP100 offers similar technical features and can equalize five meters of 26 AWG cable. Both equalizers operate over the full -40°C to 85°C temperature range.
The DS38EP100 operates from 1 Gbits/s to 5 Gbits/s, while the DS80EP100 operates from 5 Gbits/s to 10 Gbits/s. They address a variety of systems using high-definition multimedia interface (HDMI) or digital visual interface (DVI) interface standards, as well as systems using a PCI Express or XAUI interface.
Since the DS38EP100 and DS80EP100 do not require power or ground routing, system designers can place these equalizers in cables, connectors or backplanes with a minimum of layout changes. They can also cascade these devices with an active equalizer or limiting amplifier to further extend FR-4 and cable transmission links.
The passive equalizers accept any high-speed differential signal technology including current-mode logic (CML), low-voltage differential signaling (LVDS) and low-voltage positive emitter coupled logic (LVPECL). They are bi-directional, offering the same equalization gain in either direction.
The DS38EP100 and DS80EP100 may be used in a variety of applications including routers, storage subsystems and wireless base stations. They are supplied in a 6-pin LLP package for use in space- and layout-constrained systems such as cables or connectors in medical, security and industrial imaging systems.
Product information: DS38EP100, DS80EP100, and interface products
Pricing: Available now, the DS38EP100 is priced at $1.30 each and the DS80EP100 is priced at $1.60 each, both in quantities of 1,000.
National Semiconductor, 1-800-272-9959, www.national.com