PT7V4027WEX

Programmable Timers And Oscillators Overview

The PT7V4027WEX is a Voltage-Controlled Crystal Oscillator (VCXO) manufactured by Diodes Incorporated, designed to replace expensive VCXO modules. It operates at a frequency of 27MHz using an external pullable crystal and provides a ±120ppm tuning range via a control voltage from 0 to Vcc. The device supports 3.3V or 5V supply voltages and features a CMOS-compatible output driver capable of sourcing 10mA. Key electrical parameters include a maximum supply current of 8mA, a cycle-to-cycle jitter of 50ps, and an oscillator start time of up to 10ms.

Programmable Timers And Oscillators Feature Summary

• Integrated VCXO with a ±120ppm pull range controlled by VIN
• Supports 3.3V and 5V operating voltages
• CMOS output driver with 10mA drive capability
• Low power consumption with 8mA typical supply current

Programmable Timers And Oscillators Applications

• Set-Top Box systems
• xDSL equipment

Programmable Timers And Oscillators Procurement Notes

Verify the package type matches the design requirements, as the datasheet lists both SOIC and die form options. Confirm that the selected external crystal meets the recommended specifications for load capacitance and ESR to ensure proper oscillation. Check the ordering suffix to ensure compliance with lead-free manufacturing standards if required by the assembly process.

Programmable Timers And Oscillators Selection Notes

Select this component when a low-cost alternative to discrete VCXO modules is needed for 27MHz clock generation. Ensure the application environment stays within the industrial temperature range of -40°C to +85°C. Verify that the external crystal chosen has a tolerance of ±30ppm and an ESR of 35 ohms or less to match the internal negative resistance characteristics.

Programmable Timers And Oscillators Part Context

The PT7V4027 series includes variants such as PT7V4027W (SOIC), PT7V4027WE (lead-free SOIC), and PT7V4027DE (die form). The 'W' in the model number indicates the 8-pin SOIC package. These devices are part of a family designed to provide cost-effective clock solutions for telecommunications and consumer electronics applications requiring precise frequency control.

Programmable Timers And Oscillators Replacement Considerations

Direct replacements must support 27MHz operation with a similar ±120ppm tuning range. Compatible packages include 8-pin SOIC. Ensure any substitute component offers comparable CMOS output drive strength and operates within the same 3.3V/5V supply constraints.