PE43665A-Z

Overview

The PE43665A-Z is a digital step attenuator from the UltraCMOS series, designed for 75-ohm systems. It offers 6-bit resolution with a total attenuation range of 0.5 dB to 31.5 dB in 0.5 dB steps. The device operates within a frequency range of 1 MHz to 2 GHz and features an insertion loss of 1.4 dB. Powered by a 3 V supply, it is housed in a QFN-20 package and supports an operating temperature range from -40°C to +85°C.

Feature Summary

• Provides precise digital control over signal attenuation levels using a 6-bit interface.
• Engineered specifically for 75-ohm impedance environments to maintain signal integrity.
• Utilizes UltraCMOS technology to achieve low power consumption and high reliability.

Applications

• Cable television (CATV) distribution networks
• Broadband access infrastructure
• RF signal conditioning modules

Procurement Notes

Verify component status as some sources indicate this specific part number may be obsolete. Confirm current availability through authorized distributors or check for updated replacement models within the manufacturer's portfolio before finalizing procurement plans.

Selection Notes

Select this component when a 75-ohm system requires fine-resolution attenuation control up to 31.5 dB. Ensure the design environment supports the required 3 V logic levels and that the QFN-20 package footprint fits the PCB layout constraints.

Part Context

This device belongs to pSemi's UltraCMOS family of RF integrated circuits. It is distinct from other attenuators in the lineup by its specific 75-ohm impedance matching and 6-bit resolution, targeting applications where precise signal level adjustment is critical in broadband environments.

Replacement Considerations

Check official documentation for direct pin-compatible substitutes if this part is discontinued. No specific alternative part numbers are confirmed in the provided data.

FAQ

What is the minimum attenuation step size?

The minimum attenuation step size is 0.5 dB.

Does this attenuator support frequencies above 2 GHz?

No, the maximum operating frequency is specified as 2 GHz.