Applications:
|
|
Features:
|
|
DescriptionThe PRL-4110 is a 1:10 fanout, 50 Ω TTL Line Driver. It is intended for distribution of high-speed clock and logic signals to multiple loads via long lines. The 50 Ω back-terminated outputs can drive long lines with or without 50 Ω load terminations. With 50 Ω load terminations, however, all outputs of the PRL-4110 can drive 100 ft of 50 Ω cables at clock rates greater than 80 MHz. The input resistance of the PRL-4110 can be selected to be either 50 Ω or 10 kΩ by a switch. The 10 kΩ-input is desirable when interfacing with low power circuits. The 50 Ω back terminated outputs typically deliver 2.5 V into 50 Ω or 5.0 V into Hi-Z loads. All I/Os are DC coupled and have BNC or SMA connectors. The unit also has a TTL-compatible EN input pulled down via a 1 kΩ resistor. When left open the Enable is active, and the fanout buffer will output signals. The unit can be disabled by driving its EN input high. The PRL-4110 is housed in a 3.0 x 6.8 x 4.0-in. extruded aluminum enclosure and is supplied with the PRL-760E, ±9 V/±1.8 A AC/DC Adapter. The two DC power jacks are bussed together internally, allowing a second PRL-4110 to be daisy-chained from a single AC adapter. Two units can share a single PRL-760E adapter provided that the clock rate is 100 MHz or slower. A block diagram showing the equivalent input and output circuits of the PRL-4110 is shown in Fig. 1. |
|
Related Products:
|
