2 Ch. Channel Differential NECL Receiver, SMA I/Os


$ 1,366.20


  • Converts Single-ended Input Signals into Differential Signals for driving long lines
  • Ideal for receiving Differential Signal from Long Lines
  • 1 PPS/IRIG-B Line Driver
  • Converts GHz Sine Wave Signals into Differential NECL Signals
  • An Essential Lab Tool for Working with GHz NECL Circuits


  • 4 GHz typ. fMAX
  • Single-ended or Differential Inputs
  • Internal 50 Ω/-2 V Input Terminations also accept Sinewave or AC coupled signals
  • Complementary Outputs drive 50 Ω loads terminated to -2 V
  • DC Coupled I/O Compatible with ECLinPS or 100 kH Devices
  • SMA I/O Connectors
  • Ready-to-Use 1.3 x 2.9 x 2.2-in. Module includes a ±8.5 V AC/DC Adapter


The PRL-430AN is a dual channel, differential/single-ended input NECL receiver module with complementary outputs. It is intended for converting single-ended signals, including GHz sine waves, into differential NECL signals for driving long lines and for receiving differential signals from long lines.

A switch selects either single-ended or differential inputs, as shown in Fig. 1. In the differential input mode, both inputs D and D are terminated internally into 50 Ω/-2 V, and, therefore, either one or both inputs can accept AC coupled signals as well. In the single-ended input mode, signals should be connected to the D inputs only. The D inputs are switched internally to VBB, nominally -1.3 V, and termination resistors RT for the D input channels are changed to 62 Ω. Complementary outputs of the PRL-430AN are designed for driving 50 Ω loads terminated into -2 V. With internal pull-down resistors these outputs can also be AC coupled for driving 50 Ω loads terminated to ground or to other voltages.

The PRL-430AN is housed in a 1.3 x 2.9 x 2.2-in. extruded aluminum enclosure and supplied with a ±8.5 V/1.8 A AC/DC adapter.

Fig. 1, PRL-430AN Block Diagram

(0° C ≤ TA ≤ 35° C)*

Symbol Parameter PRL-430AN UNIT
Min Typ Max
Rin Input Resistance 49.5 50.0 50.5
VTT D Input Termination Voltage (fixed) -2.2 -2.0 -1.8 V
VT1 D Input Termination Voltage (variable) -1.17 -1.30 -1.43 V
VT2 D Input Termination Voltage -2.2 -2.0 -1.8 V
VIL Input Lo Voltage -1.95 -1.60 -1.48 V
VIH Input Hi Voltage -1.13 -0.90 -0.81 V
VOL Output  Lo Voltage -1.95 -1.70 -1.48 V
VOH Output Hi Voltage -1.13 -0.90 -0.81 V
IDC DC Input Current   -235 -250 mA
VDC DC Input Voltage -7.5 -8.5 -12 V
VAC AC/DC Adapter Input Voltage 103 115 127 V
TPLH Propagation Delay to output ↑   750 950 ps
TPHL Propagation Delay to output ↓   750 950 ps
tr/tf(1) Rise/Fall Times (20%-80%)   250 ps
TSKEW Skew between Q & Q outputs   20 75 ps
FMAX(2) Max clock frequency 4   GHz
VCMR Common Mode Range -2.7   -0.4 V
  Size 1.3 x 2.9 x 2.2 in.
  Weight, excluding AC adapter 5 Oz
  Shipping weight, including AC adapter 4 lb.

*All measurements are made with outputs terminated into 50 Ω/VTT, using the PRL-550NQ4X four channel NECL Terminator, connected to a 50 Ω input sampling oscilloscope.


(1). The output rise and fall times are measured with both the Q and Q outputs terminated into 50 Ω/VTT. An unused complementary output must be either terminated into 50 Ω/VTT or AC coupled into a 50 Ω; otherwise, output waveform distortion and rise time degradation will occur. Use the PRL-550NQ4X four channel NECL Terminator for the 50 Ω/-2 V termination and for connection of NECL signals to 50 Ω input oscilloscopes.

(2). fMAX is measured by AC coupling a sine wave to the D input using the differential input mode (switch up). The differential outputs are first divided by four, using the PRL-255N, and then measured using the PRL-550NQ4X four channel NECL Terminator, connected to a sampling scope.

PDF Datasheet coming soon.