AK1542A

Overview

The AK1542A is a single-channel Integer-N Frequency Synthesizer manufactured by Asahi Kasei Microdevices. It operates within a frequency range of 20 MHz to 600 MHz, utilizing a Phase-Locked Loop (PLL) architecture. The device supports differential input and output clock signals with a fixed 2:1 input-to-output ratio divider/multiplier configuration. It functions on a supply voltage ranging from 2.7 V to 5.5 V and is rated for an operating temperature range of -40°C to 85°C. The component is housed in a 24-WFQFN package with an exposed pad, measuring 4x4 mm.

Feature Summary

• Integer-N PLL frequency synthesizer covering 20 MHz to 600 MHz output range
• Differential input and output clock interfaces
• Integrated 2:1 divider/multiplier circuit
• Single-circuit design in a compact 24-QFN (4x4 mm) package

Applications

• RF frequency synthesis for communication systems
• Clock generation for high-speed digital circuits
• Test and measurement equipment requiring stable reference frequencies

Procurement Notes

The AK1542A is classified as an obsolete part status by the manufacturer. Verification of availability should focus on surplus distributors or secondary market sources rather than standard new production channels. Confirm RoHS3 compliance and check for specific obsolescence notices dated June 9, 2021, when sourcing this component.

Selection Notes

Select the AK1542A when a fixed-ratio Integer-N synthesizer is required for frequencies up to 600 MHz. Ensure the application supports differential I/O signaling and operates within the 2.7V to 5.5V supply range. Consider the 24-WFQFN package constraints for thermal management and PCB layout, particularly regarding the exposed pad connection.

Part Context

The AK1542A belongs to the AK1542 family of frequency synthesizers from Asahi Kasei Microdevices. It serves as an Integer-N variant, distinct from fractional-N counterparts like the AK1541 or AK1543. The base product number is AK1542, with aliases including AK1542ADKR and AK1542ACT.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Due to the obsolete status, direct pin-compatible replacements must be verified against specific datasheet parameters such as phase noise and output frequency limits.