2-Phase TTL Clock Source (f, f/5), SMA Outputs


$ 887.80


  • Precision Clock Source for High Speed Digital systems
  • 2-Φ Clock Generator
  • An Essential Lab Tool for Working with CMOS/TTL Circuits


  • 50 ps typical edge jitter
  • 750 ps typical skew between any two outputs
  • 1, 2.5, 5, 10, 25, and 50 MHz crystal frequencies in stock
  • Custom crystal frequencies also available
  • 50 Ω back matched outputs drive 50 Ω loads or unterminated long lines
  • DC coupled outputs
  • SMA output connectors
  • Ready-to-Use 1.3 x 2.9 x 2.9-in. module includes a ±8.5V AC/DC Adapter


The PRL-173 is a ready-to-use TTL crystal clock source module with 50 Ω back terminated outputs, designed for driving long lines with or without 50 Ω terminations.

The PRL-173 converts the internal crystal clock frequency f into 2-Φ clock outputs of f and f/5.

The maximum frequency output of the PRL-173 is 50 MHz, model number PRL-173-50. Standard crystal frequencies provided are 1 MHz, 2.5 MHz, 5 MHz, 10 MHz, 25 MHz and 50 MHz. Other crystal frequencies are also available by special order, with a 3-digit suffix indicating the requested frequency of the un-divided "f" output.

Each clock source module is housed in a 1.3 x 2.9 x 2.9-in. extruded aluminum enclosure and is supplied with a ±8.5V AC/DC Adapter.

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 voltage distribution module. Please see the Accessories Section for more detail.

PRL-173 Block Diagram

(0° C ≤ TA ≤ 35° C)

Symbol Parameter Min Typ Max Unit Comments
IDC DC Input Current 175 200 mA PRL-173-50
VDC DC Input Voltage 7.5 8.5 12 V
VAC AC/DC Adapter Input Voltage 103 115 127 V
tr/tf Rise/Fall Times, (10%-90%) 2 3 ns
tSKEW Skew between any two channels 750 1500 ps
fMAX Max output frequency 50 MHz Cable < 6'
Δf Frequency Stability 100 ppm
Frequency Jitter 50 200 ps
Positive Duty Cycle 40 % Measured @ 50%
Maximum cable length 100 ft Output frequency ≤80 MHz
Size 1 x 2.9 x 2.9 in.
Weight, excl. AC adapter 5 Oz
Shipping weight, incl. AC adapter 4 lb.