The B39721B9454M410 is a SAW (Surface Acoustic Wave) filter manufactured by EPCOS (TDK). SAW filters are fundamental components in radio frequency (RF) systems, performing the critical task of selectively passing or rejecting signals within specific frequency bands. These filters are appreciated for their compact form factor, low insertion loss, and sharp frequency selectivity.

Applications:

• DECT (Digital Enhanced Cordless Telecommunications) phones
• Wireless microphones
• Remote control systems
• Wireless security systems
• ISM (Industrial, Scientific, and Medical) band applications

Features:

• High selectivity: Provides excellent attenuation of unwanted signals outside the passband.
• Low insertion loss: Minimizes signal attenuation within the desired frequency band.
• Compact size: Enables integration into space-constrained devices.
• Surface mount technology (SMT): Allows for automated assembly on printed circuit boards (PCBs).
• Stable performance: Maintains consistent characteristics across a wide range of operating conditions.

Benefits:

• Improved signal quality: Enhances the performance of wireless communication by reducing noise and interference.
• Extended communication range: Minimizes signal loss, allowing for greater distances.
• Reduced power consumption: Improves energy efficiency by filtering desired signals effectively.
• Simplified circuit design: Integrates filtering functionality, reducing the need for discrete components.
• Enhanced reliability: Ensures consistent performance over a wide range of operating conditions.

Additional Details:

The B39721B9454M410 SAW filter utilizes the piezoelectric effect, converting electrical signals into mechanical waves (surface acoustic waves) on a piezoelectric substrate. The precise frequency response of the filter is determined by the design of the interdigital transducers (IDTs) patterned on the substrate. The SMT package is designed for efficient automated assembly processes. EPCOS (TDK) is a well-known manufacturer of high-quality RF components. While the specific operating frequency is best confirmed by the datasheet, similar SAW filters often operate in the hundreds of MHz to GHz range. This component is designated as END-OF-LIFE, meaning it is no longer actively manufactured but might be available through distributors or in existing equipment. The key parameters of the filter such as center frequency, bandwidth, insertion loss, and ripple values are specified in the datasheet.