PRL-420TD Dual Channel Differential TTL Line Driver

Mini Modular Instruments > Logic Level Translators > PRL-420TD

• Converting TTL/CMOS signals to Differential TTL Signals
• Converting TTL/CMOS Signals to RS-422 Signals
• High Speed Digital Communications system Testing
• 1 PPS/IRIG-B Line Driver
• Differential Line Drivers

• f_max > 300 MHz
• 1.1ns Typical Output Rise & Fall Times
• TTL Compatible 50 Ω Input
• 1.5 V or 1 V Selectable Input Threshold
• Complementary 50 Ω Outputs
• BNC Input/SMA Output Connectors
• DC Coupled I/O's
• Self-contained 1.3 x 2.2 x 3.9-in. unit includes AC/DC Adapter

Description

The PRL-420TD is a dual channel single-ended input, differential output TTL Line Driver. Each channel has a 50 Ω TTL/CMOS compatible input and a pair of differential 50 Ω outputs for driving long lines with or without 50 Ω terminations. The input threshold voltage can be selected between 1.5 V and 1 V using a front panel switch. The 1 V threshold is useful when dealing with weak signals.

The PRL-420TD is intended for use in testing and interfacing of high speed digital communication circuits, where conversion from single-ended TTL/CMOS level signals to differential signals is often required. The differential TTL outputs can also drive RS-422 input circuits. It is an ideal building block that complements other PRL Level Translators, such as the PRL-450ND, PRL-450PD and PRL-460NPD, in systems integration applications where interconnections of signals having different logic levels are often necessary.

The PRL-420TD is a ready-to-use functional module housed in a 1.3 x 2.2 x 2.9-in. extruded aluminum enclosure and is supplied with a ±8.5 V AC/DC Adapter. BNC input and SMA output connectors are provided. A block diagram showing the equivalent input and output circuits of the PRL-420TD is shown in Fig. 1.

Detail | Diagram | Specifications | Datasheet