SKY12343-364LF Buy Now
0.01 – 4.0 GHz Seven-Bit Digital Attenuator with Serial and Parallel Drivers

The SKY12343-364LF is a GaAs broadband seven-bit pHEMT digital attenuator with a 0.25 dB Least Significant Bit (LSB). A TTL/CMOS-compatible, dual mode serial or parallel programming interface (SPI) controller is integrated into the device.

The SKY12343-364LF attenuator features low insertion loss, excellent attenuation accuracy, a 31.75 dB attenuation range, and high linearity performance. The device is an ideal choice for a wide variety of 3G and 4G cellular infrastructure applications.

Attenuation is controlled by an SPI controller. Depending on the SPI sequence applied to the DATA_IN pin, the attenuation state between the RF1 and RF2 pins is programmed between a low insertion loss state or up to 31.75 dB. The V1 through V7 DC control pins determine the attenuation state if parallel mode is enabled.


  • Broadband operation: 0.01 to 4.0 GHz
  • Attenuation range: 31.75 dB with 0.25 dB LSB
  • TTL/CMOS-compatible serial, parallel, or latched parallel control interface
  • Single supply voltage: +3.3 or +5 V
  • Small, QFN (32-pin, 5 x 5 mm) Pb-free package (MSL1, 260 °C per JEDEC J-STD-020)
Data Sheets SKY12343-364LF: 0.01 – 4.0 GHz Seven-Bit Digital Attenuator with Serial and Parallel Drivers 201355C.pdf (1351 KB)
Product Brief 衰减范围大、精度高的数字衰减器 - 可用于样机或批量生产的优质数字衰减器,现货供应充足 BRO393_12_SCH.pdf ()
Designer Info SKY12343: S Parameters (7469 KB)
Articles Tackling Multi-Bit Attenuator Designs Microwave_RF_032012.pdf (91 KB)
ProductName : SKY12343-364LF
Control Bits/ Interface Parallel/Serial : 7/P
Frequency (GHz) Min. : 0.01
Frequency (GHz) Max. : 4
Attenuation Range (dB) : 31.75
LSB Attenuation (dB) : 0.25
Typ. IL (dB) : 1.8-1.9
Typ. IIP3 (dBm) : 50
Typ. IP1 dB (dBm) : 35
Package : QFN, 32L
Package (mm) : 5 x 5 x 0.9
Product Information:
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