PRL-420ND/PD Dual Channel TTL To ECL/PECL Logic Level Translators

Mini Modular Instruments > Logic Level Translators > PRL-420ND/PD

Applications:

• Converting TTL/CMOS signals to Differential ECL/PECL Signals
• High Speed Digital Communications system testing
• High Speed SONET Clock Level Translation
• Converting TTL/CMOS Clocks to ECL/PECL Clocks for connection to Transient Recorders

Features:

• f_MAX > 300 MHz 
• 750 ps/1100 ps t_r for PRL-420ND/420-PD
• 50 Ω TTL/CMOS Input
• 1.5 V or 1 V Selectable Input Threshold
• Complementary ECL/PECL Outputs
• BNC Input/SMA Output Connectors
• DC-Coupled I/O's
• Self-contained 1.3 x 2.9 x 3.9-in. units including AC/DC Adapters
• Rack-mountable 20-channel ECL unit also available

Description:

The PRL-420ND and PRL-420PD are, respectively, dual channel TTL/CMOS to NECL and TTL/CMOS to PECL Logic Level Translators. Each unit has a switch-selectable 1.5 V or 1 V input threshold voltage. The PRL420ND has a pair of complementary NECL outputs suitable for driving 50 Ω loads terminated to -2 V. The complementary PECL outputs from the PRL420PD are suitable for driving 50 Ω loads terminated to +3 V. The outputs of both units can also drive AC-coupled or floating 50 Ω.

These Logic Level Translators are designed specifically for use in testing and interfacing of high speed digital communications circuits, where conversions from TTL/CMOS level signals to NECL and PECL level signals are often required. They are ideal building blocks that complement other PRL Logic Level Translators, such as the PRL-450ND, PRL-450PD, PRL-460NPD and PRL-460PND, etc. in systems integration applications where interconnections of mixed logic signals are often necessary.

They are ready-to-use functional modules housed in 1.3 x 2.9 x 3.9-in. extruded aluminum enclosures and are supplied with ±8.5V AC/DC Adapters. Both units have BNC input connectors and SMA output connectors. Block diagrams of these Logic Level Translators are shown in Fig. 1A and Fig. 1B.

If mounting is desired, a pair of 35001420 mounting brackets can accommodate two PRL modules of the same length. A number of PRL modules can also share a single ±8.5V AC/DC adapter using the PRL-730 or PRL-746 voltage distribution module.

Detail | Specifications | Diagram | Datasheet