1 of 9

GaAs HBT

InGaP HBT

GaAs MESFET

SiGe BiCMOS

Si BiCMOS

SiGe HBT

GaAs pHEMT

Si CMOS

Si BJT

GaN HEMT

Functional Block Diagram

RF MICRO DEVICES®, RFMD®, Optimum Technology Matching®, Enabling Wireless Connectivity™, PowerStar®, POLARIS™ TOTAL RADIO™ and UltimateBlue™ are trademarks of RFMD, LLC. BLUETOOTH is a trade-

mark owned by Bluetooth SIG, Inc., U.S.A. and licensed for use by RFMD. All other trade names, trademarks and registered trademarks are the property of their respective owners. ©2012, RF Micro Devices, Inc.

Product Description

7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical

support, contact RFMD at (+1) 336-678-5570 or customerservice@rfmd.com.

Ordering Information

BiFET HBT



24

SPI

RF1

GND

VCC

GND

GND

RF2

GND

GND

GND

GND

GND

GND

6-Bit DSA

23

22

19

20

21

7

8

9

12

11

10

1

2

3

6

5

4

18

17

16

13

14

15

RFSA2654

SERIAL CONTROLLED 75

DIGITAL STEP

ATTENUATOR 5MHz TO 2000MHz, 6-BIT, 0.5dB

RFMD's RFSA2654 is a 6-bit, 75

 digital step attenuator (DSA) that features high

linearity over the entire 31.5dB gain control range with excellent step accuracy in

0.5dB steps. The RFSA2654 is programmed via a serial mode control interface that

is both 3V and 5V compatible. The RFSA2654 also offers a rugged Class 1C HBM

ESD rating via on-chip ESD circuitry. The MCM package is footprint compatible with

most 24-pin 4mm x 4mm QFN packages.

Features



Frequency Range 5MHz to

2000MHz



6-Bits, 75

, 31.5dB Range,

0.5dB Step



High Linearity, IIP3 >50dBm



3V and 5V Logic Compatible



Serial-to-Parallel Controller



Serial Programming Interface



Power-up Programming Modes



On-chip ESD Protection Class 1C

HBM



Single Supply, 5V Operation



Footprint Compatible with Most

24-Pin, 4mm x 4mm, QFNs

Applications



CATV/Satellite Set Top Boxes



Cable Modems



CATV Infrastructure



Data Network Equipment

DS121031



Package: MCM, 24-Pin, 4.2mm x 4.2mm

RFSA2654

Serial Con-

trolled 75W



Digital Step

Attenuator

5MHz to

2000MHz, 6-

Bit, 0.5dB LSB

RFSA2654SQ

Sample bag with 25 pieces

RFSA2654SR

7” Sample reel with 100 pieces

RFSA2654TR13

13” Reel with 2500 pieces

RFSA2654PCK-410 5MHz to 2000MHz PCBA with 5-piece sample bag