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Skyworks’ SKY12343-364LF is a seven-bit digital attenuator comprised of a GaAs attenuator and a silicon CMOS driver. The attenuation setting is controlled by a serial or parallel interface. Attenuation is set by a stream of data that is clocked into the shift registers of the silicon chip by the CLOCK signal.

Pin 3 (P/S) selects the input mode of the attenuator. A logic low signal applied to pin 3 enables parallel mode; a logic high enables serial mode.

Serial input data (DATA_IN pin) is shifted into the register on the rising edge of the clock signal (CLOCK pin), Least Significant Bit (LSB) first. The attenuator changes states on the rising edge of the latch enable signal (LATCH_ENABLE pin) according to the most most recent seven bits of shifted data accepted since the previous falling edge of the latch enable signal.

Applications include:

* Cellular and 3G infrastructure

* WiMAX, LTE, 4G infrastructure

Features include:

* Broadband operation: 0.1 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)


Skyworks Solutions, Inc.
http://www.skyworksinc.com