The Murata Electronics #616DB-1191=P3 is a surface-mount balun covering 1MHz to 500MHz, packaged as a 6-SMD gull-wing part with five leads on tape and reel. Its catalog listing quotes a minimum return loss of 3dB and places it in the EMC and balun category.
Baluns convert between balanced and unbalanced signals. In practice they connect differential transceivers, ADCs or DACs to single-ended coaxial lines, feed balanced antennas, and improve common-mode rejection on interfaces that leave the board, which helps with EMC compliance.
The 1MHz to 500MHz span covers HF and VHF radio, cable and broadcast equipment, and IF stages in receivers. Designers should verify impedance ratio, insertion loss and amplitude and phase balance from the full Murata datasheet, because the summary leaves these fields open.
Layout guidance is the same as for other wideband baluns: keep balanced traces short and symmetric, provide a solid ground plane under the part, and follow Murata's recommended land pattern.
Murata has marked this part end of life. Production programs should estimate remaining demand, buy inventory while it is available and qualify an alternative early. Confirm the =P3 packaging suffix and date codes when ordering.
Detailed parameters, pricing and stock are listed on the #616DB-1191=P3 Murata 1-500MHz SMD balun page at ChipApex, an independent electronic components distributor in Shenzhen. You can also browse the full catalog at ChipApex.
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