$ 799.25


  • GHz AND Logic Functions
  • Differential Receiver
  • Sub-nanosecond Pulse Width Generation
  • An Essential Lab Tool for Working with NECL Circuits


  • 2.5GHz fMAX
  • Differential Inputs
  • Internal 50 Ω/VTT Input Terminations also accept AC-coupled ECL or Sinewave signals
  • Complementary Outputs drive 50 Ω loads terminated to VTT or AC coupled 50 Ω loads
  • DC Coupled I/O’s Compatible with ECLinPS or 100KH Devices
  • SMA I/O Connectors
  • Ready-to-Use 1.3 x 2.9 x 2.2-in. Module includes AC/DC Adapter


The PRL-435N is a high-speed Differential Input AND Gate module intended for applications in the GHz frequency range. It can be used for signal gating or for generating narrow pulses by applying two differential signals with small different delays to its inputs. As an example, a pulse as narrow as 600ps can be generated when the PRL-435N is driven by the outputs of the PRL-480N, dual channel ECL programmable Delay Module.

The PRL-435N model has NECL inputs and outputs. Using AC coupling, the PRL-435N can also receive GHz sinewave or PECL signals.

Complementary outputs of the PRL-435N, with internal pull down resistors, can drive either 50 Ω loads terminated into VTT, or AC-coupled 50 Ω loads.

The PRL-435N is housed in a 1.3 x 2.9 x 2.2-in. extruded aluminum enclosure and is supplied with a -12V/500mA AC/DC adapter.


(0° C ≤ TA ≤ 35 ° C)*

Symbol Parameter PRL-435N UNIT Comments
Min Typ Max
RIN Input Resistance 49.5 50.0 50.5 Ω
VTT Input Termination Voltage -2.2 -2.0 -1.8 V D input
IDC DC Input Current -230 -250 mA
VDC DC Input Voltage -8.5 -7.5 -12 V
VAC AC/DC Adapter Input Voltage 103 115 127 V
TPLH Propagation Delay to output ↑ 1300 1500
TPHL Propagation Delay to output ↓ 1300 1500 Ps
tr/tf Rise/Fall Times (20%-80%) 400 600 ps Note (1)
TSKEW Skew between any 2 outputs 60 120 Ps
FMAX Max clock frequency 2.0 2.5 GHz Note (2)
VCMR Common Mode Range -2.7 -0.4 V Note (3)
Size 1.3 x 2.9 x 2.2 in.
Weight 5 Oz


All dynamic measurements are made with outputs terminated into 50 Ω/VTT, using the PRL-550 Series, four channel ECL/PECL/LVPECL Terminators, connected to a 50 Ω input sampling oscilloscope.

The output rise and fall times are measured with with all inputs terminated into 50 Ω/VTT. For best performance all outputs should be terminated into 50 Ω/VTT or else AC- coupled into 50 Ω loads. If a single output is used, its complement must be terminated; otherwise output waveform distortion will occur. If one pair of complementary outputs is used, the other complementary pair may remain unterminated. Use the PRL-550 Series, four channel ECL/PECL/LVPECL Terminators, for the 50 Ω/VTT termination and for connection of ECL/PECL/LVPECL signals to 50 Ω input oscilloscopes. The PRL-ACT-50, Dual Channel AC-Coupled 50 Terminator, may also be used to provide the 50 /VTT termination. If preservation of DC levels is not required, then the PRL-SC-104, 0.1 µf DC block or the PRL-ACX-12dB, 12 dB AC-coupled attenuator, may be used to connect the NECL/PECL/LVPECL outputs to 50 Ω input instruments.

fMAX is measured using differential inputs only. The outputs are first divided by four, using the PRL-255N/P ECL/PECL Frequency Divider, and then measured using the PRL-550 Series, four channel ECL/PECL/LVPECL Terminator, connected to a sampling 'scope.

When the unit is driven by an AC-coupled sine wave signal in the differential input mode, the signal swing is symmetric with respect to VTT. The peak-to peak swing of the input signal should not exceed these Common Mode limits.