PRL-4110, 1:10 Fanout 50 Ω TTL/CMOS Line Driver

Mini Modular Instruments > Fanout Buffers > PRL-4110

Applications:

• TTL/CMOS Clock Distribution
• 1:10 Fanout Line Driver
• High Speed Digital Communications System Testing
• Mini Modular Instrument

Features:

• fmax > 100 MHz
• Drives 100 ft of cable @ 80 MHz
• 1.8 ns Typical Output Rise & Fall Times
• 2.5 V into 50 Ω Typical
• TTL Compatible 50 Ω or 10 kΩ Input
• Ten in-phase 50 Ω TTL Outputs
• Active Low EN (Enable) Input
• BNC I/O Connectors
• DC Coupled I/Os
• Self-contained 3.0 x 6.8 x 4.0-in. unit includes an AC/DC Adapter

Description:

The PRL-4110-BNC 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 connectors. SMA I/Os are available on special order (P/N PRL-4110-SMA).

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-760B, ±8.5 V/±1.4 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-760B adapter provided that the clock rate is 100 MHz or slower. The larger PRL-760C adapter, with point-to-point cabling, is recommended for multiple units at high data rates.

A block diagram showing the equivalent input and output circuits of the PRL-4110 is shown in Fig. 1.

Related Products:

• PRL-4220, 2:20 Fanout 50 Ω TTL Line Driver, equivalent to two PRL-4110 units in a single enclosure
• PRL-4330, 3:30 Fanout 50 Ω TTL Line Driver, equivalent to three PRL-4110 units in a single enclosure
• PRL-4122, 1:22 Fanout 50 Ω TTL Line Driver, equivalent to one PRL-414B driving two PRL-4110 units in a single enclosure

PRL-4110 | Detail | Diagram | Specifications | Datasheet