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PC units (2)
Support Products (3)
Embedded (6)

Quantity1+2000+ 6000+ 16000+ 
Price for each2.10EUR 2.10EUR 1.95EUR 1.85EUR
Your savings - 7%12%

EM125J is a fast analogue random number module intended for high-speed FPGA solutions. The noise source is Johnson resistor noise. The circuit may need extra shielding in some applications.

There is no processor included in the circuit. We can optionally include a processing unit, including software, or we can provide a software for your existing processor/FPGA. Due to the high speed of the module, the output in an actual application is often CPU limited.

The price tag is for a license solution, where the customer supply all components, mount the components and download software to processor(s).
We include reasonable schematics and also a layout. For adjustments and customer specific software we add a fee for the development time. If it is easy to specify, or include, the embedded processing software into your application, we will do so with no extra fee.

With a paid order volume above 50.000 units, the licence is free. The paid license may be applied to several of your products, but is restricted to a single customer.


  1. Drive voltage: 3.3V(-5%) up to 5.0V(+10%)
  2. Power supply: Filtered
  3. Input current: 40 mA
  4. Noise source: Thermodynamic noise (Johnson noise)
  5. Output: Analogue output (Z<0.2 kOhms) Normal output voltage.
  6. Speed: 12 Mbits/s
  7. PCB: Two layers
  8. Shielding: Shielding box necessary or recommended + Ground Plane
  9. Processing: No processing included in circuit. Software may be run on host processor or a microcontroller may be used. Speed often CPU limited.
  10. Component Availability: very good; multi source on all components



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