BU2373FV-E2

Overview

The BU2373FV-E2 is a high-performance voltage-controlled oscillator (VCO) integrated circuit manufactured by ROHM Semiconductor, designed for image sampling applications. It integrates a VCO and a rising-edge trigger phase comparator to facilitate PLL system configuration via external low-pass filters and frequency dividers. The device operates within an oscillation range of 37 MHz to 65 MHz at 3.3 V supply, with specific ranges defined by bias resistance and supply voltage. Key features include independent power-down modes for the VCO and phase comparator, selectable output frequency division via the SELECT pin, and midpoint frequency setting through external resistance. It is housed in a compact SSOP-B14 package.

Feature Summary

• Integrated VCO and rising-edge trigger phase comparator for PLL system construction
• Independent power-down mode settings for VCO and phase comparator blocks
• Selectable VCO output frequency division (1/2) via the SELECT pin
• Midpoint frequency setting capability through external bias resistance adjustment

Applications

• CRT monitors
• LCD monitors
• CD-RW drives

Procurement Notes

Verify component status as the BU2373FV series may be subject to discontinuation or end-of-life notifications. Confirm availability through authorized distributors and check for updated product change notices. Ensure compliance with RoHS directives and verify that the E2 suffix corresponds to the required environmental specifications without altering functional parameters.

Selection Notes

Select the BU2373FV-E2 when a general-purpose VCO with integrated phase comparison is required for video accessory circuits. Consider the operating temperature range of -20°C to 75°C and the SSOP-B14 package constraints. Evaluate the required oscillation frequency range against the available bias resistor values and supply voltages (3.0 V, 3.3 V, or 5.0 V) to ensure stable PLL loop performance.

Part Context

The BU2373FV-E2 belongs to the BU2373FV/BU2374FV series of high-performance VCOs for image sampling. It shares the same SSOP-B14 package and core architecture with the BU2374FV, which offers a different frequency dividing mode (1/4). Both devices are part of ROHM's Video Accessory ICs lineup, targeting display and optical storage applications requiring precise clock generation.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Designers should consult ROHM Semiconductor for current alternatives or cross-reference options based on specific electrical requirements and package compatibility.

FAQ

How is the VCO output frequency divided?

The VCO output frequency division can be selected using the SELECT pin. Setting this pin to 'H' enables frequency dividing output (1/2 for BU2373FV), while 'L' enables through output.

What is the function of the BIAS pin?

The BIAS pin (Pin 13) is used to set the bias current for shifting the VCO oscillation range. An external resistor connected to VCO_VDD controls this current, allowing fine adjustment of the output frequency.

Can the VCO and phase comparator be powered down independently?

Yes, the device supports independent power-down mode settings. Setting VCO_INHIBIT to 'H' disables the VCO, and setting PFD_INHIBIT to 'H' disables the phase comparator, reducing consumption current in standby mode.