ASNT8160C-KMF

Overview

The ASNT8160C-KMF is a programmable half-rate clock recovery (CR) circuit designed for high-speed data applications. It supports input data rates from 24.5 GHz to 32.0 GHz, corresponding to bit rates up to 64 Gb/s. The device utilizes three on-chip voltage-controlled oscillators (VCOs) to cover the operational frequency range. It accepts NRZ input data via CML differential interfaces and outputs a recovered half-rate clock signal also in CML format. Powered by a single +3.3V or -3.3V supply, the IC consumes up to 1.6W at maximum speed. It operates within an industrial junction temperature range of -25°C to 125°C.

Feature Summary

• Half-rate clock recovery with integrated VCOs covering 24.5GHz to 32.0GHz input data rates
• CML compliant differential input and output interfaces with on-chip 50 Ohm termination
• LVDS compliant low-speed reference clock input buffer supporting up to 1 Gb/s
• Single +3.3V or -3.3V power supply operation with 1.6W maximum power consumption

Applications

• High-speed serial link clock recovery systems
• Optical communication transceivers requiring half-rate clock extraction
• Test and measurement equipment operating at 24.5-32 GHz frequencies

Procurement Notes

Verify the specific VCO mode selection requirements based on the target input data rate using the vcos0 and vcos1 control pins. Ensure the external loop filter connected to pin ftr matches the design specifications for stable lock acquisition. Confirm the power supply configuration (positive or negative) as it dictates the required AC/DC termination strategy for all I/O connections.

Selection Notes

Select this component when a half-rate clock output is required from a 24.5-32 GHz NRZ data stream. The device requires an external low-speed reference clock running at 1/32 the active VCO frequency. Designers must account for the 15°C/W thermal resistance and utilize the center heat slug for adequate heat dissipation. The package is a custom 64-pin CQFP which may require specialized PCB layout considerations.

Part Context

The ASNT8160C-KMF belongs to the ASNT series of clock recovery circuits manufactured by Advanced Science And Novel Technology Company, Inc. It is distinct from demultiplexers like the ASNT2111-KMF as it focuses solely on clock recovery rather than data splitting. The 'KMF' suffix denotes the specific 64-pin CQFP package variant.

Replacement Considerations

No direct public substitute part numbers are documented. Due to the proprietary nature of the VCO tuning and interface specifications, any replacement must be evaluated against the specific frequency ranges and electrical characteristics defined in the datasheet.

FAQ

How is the operational frequency range selected?

The desired working frequency is selected using the 2.5V CMOS control pins vcos0 and vcos1. Table 1 in the datasheet defines three modes covering different frequency bands up to 32.0 GHz.

What is the function of the phshft pin?

The phshft pin is used to adjust the phase of the internal half-rate clock. It accepts a DC voltage ranging from vcc to vcc-1.0V to align the clock phase correctly with the incoming data signal.

Can the device operate with single-ended inputs?

Yes, the Data IB and HS CIB buffers can accept single-ended signals. For single-ended operation, a correct threshold voltage must be applied to the unused input pin.