PRL-450ND/PD Dual Channel ECL/PECL to TTL Translators

Mini Modular Instruments > Logic Level Translators > PRL-450

Applications:

• Converting Single Ended or Differential ECL/PECL Signals to TTL Signals
• High Speed Digital Communications Systems Testing
• High Speed SONET Clock Level Translation

Features:

• f_max > 300 MHz
• 1.1ns Typical Output Rise & Fall Times
• 50 Ω/-2 V Input for ECL and 50Ω /3V for PECL
• Single Ended or Differential Inputs.
• Complementary 50 Ω TTL Level Outputs
• SMA I/O Connectors
• Self-contained 1.3 x 2.9 x 3.9-in. units including AC/DC Adapters

The PRL-450 series of logic translators converts ECL signals to TTL signals:

• PRL-450LPD, translates LVPECL to TTL

• PRL-450ND, translates NECL to TTL

• PRL-450PD, translates PECL to TTL

Each unit can receive either single ended or differential input signals, selected by a switch. The outputs of these translators have 50 Ω back terminations, and, therefore, they drive 50 Ω terminated or unterminated lines. These high speed translators facilitate testing of high speed digital communications circuits, where conversion of ECL and PECL clock and data signals to TTL level signals is often required.

The PRL-450ND is designed to interface with NECL circuits operating with a -5.2 V or -4.5 V supply, and the PRL-450PD is designed to interface with PECL circuits operating with a +5 V supply, while the PRL-450LPD is designed to interface with Low-Voltage LVPECL circuits operating with a +3.3 V supply.

In the differential input mode, both inputs D and D of the PRL-450ND are terminated into 50 Ω/-2 V, and those of the PRL-450PD into 50 Ω/+3 V or 50 Ω/+1.3 V for the PRL-450LPD. In this mode, either one or both inputs can accept AC coupled signals as well.

In the single input mode, signals should be connected to the D inputs only. The D inputs are switched internally to V_BB, nominally -1.3 V for the PRL-450ND, +3.7 V for the PRL-450PD, and +2.0 V for the PRL-450LPD. The termination resistors, R_T, for the D input channels are changed to 62 Ω.

Each unit is supplied with a ±8.5 V AC/DC Adapter and housed in an attractive 1.3 x 2.9 x 3.9-in. extruded aluminum enclosure.

PRL-450 | Detail | Diagrams | Specifications | Datasheet