RFSA3714 [RFMD]

50MHz to 6000MHz, Digital Step Attenuator;
RFSA3714
型号: RFSA3714
厂家: RF MICRO DEVICES    RF MICRO DEVICES
描述:

50MHz to 6000MHz, Digital Step Attenuator

文件: 总20页 (文件大小:2074K)
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RFSA3714  
RFSA3714  
50MHz to 6000MHz, Digital Step Attenuator  
Package: QFN, 24-pin,  
The RFMD’s RFSA3714 is a 7-bit digital step attenuator  
(DSA) that features high linearity over the entire 31.75dB gain  
control range with 0.25dB steps. The RFSA3714 features  
three modes of control: serial, latched parallel, and direct  
parallel programming. The RFSA3714 has a low insertion loss  
of 1.5dB at 2GHz. Patent pending circuit architecture provides  
Overshoot-free transient switching performance. The  
RFSA3714 is available in a 4mm x 4mm QFN package.  
4.0mm x 4.0mm x 0.85mm  
Features  
7-Bit, 31.75dB Range, 0.25dB Step  
Patent Pending Circuit Architecture  
Overshoot-free Transient  
Switching Performance  
Frequency Range 50MHz to  
6000MHz  
High Linearity, IIP3 >55dBm  
Serial and Parallel Control  
Interface  
Fast Switching Speed, <120nsec  
24  
23  
22  
21  
20  
19  
Single Supply 3V to 5V Operation  
SI  
C0.25  
VDD  
1
2
3
4
5
6
18  
17  
16  
15  
RF Pins Have No DC Voltage, Can  
be DC Grounded Externally  
CLK  
LE  
LOGIC CONTROL  
7-BIT DSA  
Power-up Default Setting Is  
Maximum Attenuation  
PBAR/S  
GND  
GND  
14 RFOUT  
GND  
13  
RFIN  
Applications  
GND  
2G through 4G Base Stations  
7
8
9
10  
11  
12  
Point-to-Point  
WiFi  
Functional Block Diagram  
Test Equipment  
Ordering Information  
RFSA3714SQ  
Sample bag with 25 pieces  
RFSA3714SR  
7" Reel with 100 pieces  
RFSA3714TR13  
RFSA3714PCK-410  
13" Reel with 2500 pieces  
50MHz to 6000MHz PCBA with 5-piece sample bag  
RF Micro Devices Inc. 7628 Thorndike Road, Greensboro, NC 27409-9421  
DS141203  
For sales or technical support, contact RFMD at +1.336.678.5570 or customerservice@rfmd.com.  
RF MICRO DEVICES® and RFMD® are trademarks of RFMD, LLC. BLUETOOTH is a trademark 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. ©2013, RF Micro Devices, Inc.  
1 of 20  
RFSA3714  
Absolute Maximum Ratings  
Caution! ESD sensitive device.  
Parameter  
Rating  
Unit  
-0.5 to +6.0  
V
Supply Voltage (VDD  
)
All Other DC and Logic Pins (Supply Voltage Must Be Applied  
Prior to Any Other Pin Voltages)  
-0.5 to +6.0  
+30  
V
RFMD Green: RoHS status based on EU  
Directive 2011/65/EU (at time of this  
document revision), halogen free per IEC  
61249-2-21, < 1000ppm each of  
antimony trioxide in polymeric materials  
and red phosphorus as a flame retardant,  
and <2% antimony in solder.  
Maximum Input Power at RFIN Pin at 85°C Case  
Temperature  
dBm  
dBm  
Maximum Input Power at RFOUT Pin at 85°C Case  
Temperature  
+27  
Storage Temperature Range  
-40 to +150  
1000  
°C  
V
Exceeding any one or a combination of the Absolute  
Maximum Rating conditions may cause permanent  
damage to the device. Extended application of Absolute  
Maximum Rating conditions to the device may reduce  
device reliability. Specified typical performance or  
functional operation of the device under Absolute  
Maximum Rating conditions is not implied.  
ESD Rating - Human Body Model (HBM)  
Moisture Sensitivity Level  
MSL1  
Recommended Operating Condition  
Specification  
Parameter  
Unit  
Max  
Min  
Typ  
Operating Temperature Range (RF Input  
Power Handling Derates Above 85°C)  
-40  
+105  
°C  
Operating Junction Temperature  
Supply Voltage  
125  
5.5  
°C  
V
2.7  
Nominal Operating Parameters  
Specification  
Parameter  
Unit Condition  
Min  
Typ  
Max  
General Performance  
Supply Current  
Steady state operation, current draw during attenuation state transitions is  
higher.  
180  
55  
µA  
Thermal Resistance  
RF Input Power at RFIN Pin  
RF Input Power at RFOUT Pin  
RF Performance  
Frequency Range  
°C/W At maximum attenuation state with RF power applied to the RFIN pin  
27  
20  
dBm  
Continuous operation at +85°C case temperature  
dBm  
50  
6000  
MHz  
Insertion Loss  
1.5  
dB  
dB  
2000MHz, 0dB attenuation  
0.25dB step size  
Attenuation Range  
Absolute Attenuation Error  
Input IP3  
31.75  
±(0.2 + 4%)  
dB  
55  
30  
15  
50  
dBm  
dBm  
dB  
Input P0.1dB  
Return Loss  
Ω
Input and Output Impedance  
RF Micro Devices Inc. 7628 Thorndike Road, Greensboro, NC 27409-9421  
For sales or technical support, contact RFMD at +1.336.678.5570 or customerservice@rfmd.com.  
DS141203  
The information in this publication is believed to be accurate. However, no responsibility is assumed by RF Micro Devices, Inc. ("RFMD") for its use, nor for any infringement of patents or other rights of  
third parties resulting from its use. No license is granted by implication or otherwise under any patent or patent rights of RFMD. RFMD reserves the right to change component circuitry, recommended  
application circuitry and specifications at any time without prior notice.  
2 of 20  
RFSA3714  
Specification  
Parameter  
Unit Condition  
Min  
Typ  
Max  
General Performance  
Switching Speed  
120  
2
nsec  
Deg  
50% control to 10%/90% RF  
2000MHz  
Successive Step Phase Delta  
Control  
Digital Logic Low  
Digital Logic High  
0.63  
V
V
1.17  
Note: Typical performance at these conditions: Temp = 25°C, 2000MHz, 5V Supply Voltage  
RF Micro Devices Inc. 7628 Thorndike Road, Greensboro, NC 27409-9421  
For sales or technical support, contact RFMD at +1.336.678.5570 or customerservice@rfmd.com.  
DS141203  
The information in this publication is believed to be accurate. However, no responsibility is assumed by RF Micro Devices, Inc. ("RFMD") for its use, nor for any infringement of patents or other rights of  
third parties resulting from its use. No license is granted by implication or otherwise under any patent or patent rights of RFMD. RFMD reserves the right to change component circuitry, recommended  
application circuitry and specifications at any time without prior notice.  
3 of 20  
RFSA3714  
Typical Application Schematic  
RF Micro Devices Inc. 7628 Thorndike Road, Greensboro, NC 27409-9421  
For sales or technical support, contact RFMD at +1.336.678.5570 or customerservice@rfmd.com.  
DS141203  
The information in this publication is believed to be accurate. However, no responsibility is assumed by RF Micro Devices, Inc. ("RFMD") for its use, nor for any infringement of patents or other rights of  
third parties resulting from its use. No license is granted by implication or otherwise under any patent or patent rights of RFMD. RFMD reserves the right to change component circuitry, recommended  
application circuitry and specifications at any time without prior notice.  
4 of 20  
RFSA3714  
Typical Performance: 0.25dB Steps  
RF Micro Devices Inc. 7628 Thorndike Road, Greensboro, NC 27409-9421  
For sales or technical support, contact RFMD at +1.336.678.5570 or customerservice@rfmd.com.  
DS141203  
The information in this publication is believed to be accurate. However, no responsibility is assumed by RF Micro Devices, Inc. ("RFMD") for its use, nor for any infringement of patents or other rights of  
third parties resulting from its use. No license is granted by implication or otherwise under any patent or patent rights of RFMD. RFMD reserves the right to change component circuitry, recommended  
application circuitry and specifications at any time without prior notice.  
5 of 20  
RFSA3714  
Typical Performance: 0.25dB Steps  
Note: Attenuator remains monotonic if step error is less than +0.25dB.  
RF Micro Devices Inc. 7628 Thorndike Road, Greensboro, NC 27409-9421  
For sales or technical support, contact RFMD at +1.336.678.5570 or customerservice@rfmd.com.  
DS141203  
The information in this publication is believed to be accurate. However, no responsibility is assumed by RF Micro Devices, Inc. ("RFMD") for its use, nor for any infringement of patents or other rights of  
third parties resulting from its use. No license is granted by implication or otherwise under any patent or patent rights of RFMD. RFMD reserves the right to change component circuitry, recommended  
application circuitry and specifications at any time without prior notice.  
6 of 20  
RFSA3714  
Typical Performance: 0.25dB Steps  
RF Micro Devices Inc. 7628 Thorndike Road, Greensboro, NC 27409-9421  
For sales or technical support, contact RFMD at +1.336.678.5570 or customerservice@rfmd.com.  
DS141203  
The information in this publication is believed to be accurate. However, no responsibility is assumed by RF Micro Devices, Inc. ("RFMD") for its use, nor for any infringement of patents or other rights of  
third parties resulting from its use. No license is granted by implication or otherwise under any patent or patent rights of RFMD. RFMD reserves the right to change component circuitry, recommended  
application circuitry and specifications at any time without prior notice.  
7 of 20  
RFSA3714  
Typical Performance: 0.25dB Steps  
RF Micro Devices Inc. 7628 Thorndike Road, Greensboro, NC 27409-9421  
For sales or technical support, contact RFMD at +1.336.678.5570 or customerservice@rfmd.com.  
DS141203  
The information in this publication is believed to be accurate. However, no responsibility is assumed by RF Micro Devices, Inc. ("RFMD") for its use, nor for any infringement of patents or other rights of  
third parties resulting from its use. No license is granted by implication or otherwise under any patent or patent rights of RFMD. RFMD reserves the right to change component circuitry, recommended  
application circuitry and specifications at any time without prior notice.  
8 of 20  
RFSA3714  
Typical Performance: 0.5dB Steps  
Typical Performance: 1.0dB Steps  
Notes:  
1. Top 2 Plots: Attenuator remains monotonic if step error is less than +0.5dB.  
2. Bottom 2 Plots: Attenuator remains monotonic if step error is less than +1.0dB  
RF Micro Devices Inc. 7628 Thorndike Road, Greensboro, NC 27409-9421  
For sales or technical support, contact RFMD at +1.336.678.5570 or customerservice@rfmd.com.  
DS141203  
The information in this publication is believed to be accurate. However, no responsibility is assumed by RF Micro Devices, Inc. ("RFMD") for its use, nor for any infringement of patents or other rights of  
third parties resulting from its use. No license is granted by implication or otherwise under any patent or patent rights of RFMD. RFMD reserves the right to change component circuitry, recommended  
application circuitry and specifications at any time without prior notice.  
9 of 20  
RFSA3714  
Evaluation Board Schematic 50MHz to 6000MHz Application Circuit  
RF Micro Devices Inc. 7628 Thorndike Road, Greensboro, NC 27409-9421  
For sales or technical support, contact RFMD at +1.336.678.5570 or customerservice@rfmd.com.  
DS141203  
The information in this publication is believed to be accurate. However, no responsibility is assumed by RF Micro Devices, Inc. ("RFMD") for its use, nor for any infringement of patents or other rights of  
third parties resulting from its use. No license is granted by implication or otherwise under any patent or patent rights of RFMD. RFMD reserves the right to change component circuitry, recommended  
application circuitry and specifications at any time without prior notice.  
10 of 20  
RFSA3714  
Evaluation Board Bill of Materials (BOM) 50MHz to 6000MHz Application Circuit  
Description  
Reference Designator  
Manufacturer  
Manufacturer's P/N  
SA3714-410  
Dynamic Details (DDI) Toronto  
RFMD  
SA3714-410(B)  
RFSA3714SB  
Digital Step Attenuator 50MHz to 6000MHz  
CAP, 1µF, 10%, 25V, X7R, 1206  
U1  
C34  
Taiyo Yuden (USA), Inc.  
Molex  
CE TMK316BJ105KL-T  
SD-7351-4000  
CONN, SMA, END LNCH, UNIV, HYB  
MNT  
J1-J4  
CONN, HDR, ST, 9-PIN, 0.100”  
CONN, SKT, 24-PIN DIP, 0.600”, T/H  
MOD, USB TO SERIAL UART, SSOP-28  
CONN, HDR, ST, 3 x 5, 0.100”, T/H  
CONN, HDR, ST, 2-PIN, 0.100:  
CONN, HDR, 2 x 4, RA, 0.100, T/H  
CONN, HDR, ST, PLRZD, 2-PIN, 0.100”  
CAP, 470pF, 5%, 50V, C0G, 0402  
Jumper, 2-Pin  
P1  
Samtec Inc.  
Aries Electronics Inc.  
Future Technology Devices Int’l  
Samtec Inc.  
TSW-109-07-G-S  
24-6518-10  
P2  
M1 (See Note 1)  
UM232R  
P3 (See Note 2)  
TSW-105-07-L-T  
TSW-102-07-G-S  
TSW-104-08-G-D-RA  
MPSS100-2-C  
GRM1555C1H471JA01D  
929950-00  
P4  
Samtec Inc.  
P5  
Samtec Inc.  
P6  
C40  
ITW Pancon  
Murata Electronics  
3M Interconnect Solutions  
N/A  
S1-S2 (See Note 2)  
DNP  
C20-C26, C29, C33,  
C35-C39, S6  
N/A  
Notes:  
1. M1 should be mounted into P2 with respect to the Pin 1 alignment of M1 and P2.  
2. Jumpers S1 and S2 should be installed on P3.  
RF Micro Devices Inc. 7628 Thorndike Road, Greensboro, NC 27409-9421  
For sales or technical support, contact RFMD at +1.336.678.5570 or customerservice@rfmd.com.  
DS141203  
The information in this publication is believed to be accurate. However, no responsibility is assumed by RF Micro Devices, Inc. ("RFMD") for its use, nor for any infringement of patents or other rights of  
third parties resulting from its use. No license is granted by implication or otherwise under any patent or patent rights of RFMD. RFMD reserves the right to change component circuitry, recommended  
application circuitry and specifications at any time without prior notice.  
11 of 20  
RFSA3714  
Evaluation Board Assembly Drawing  
RF Micro Devices Inc. 7628 Thorndike Road, Greensboro, NC 27409-9421  
For sales or technical support, contact RFMD at +1.336.678.5570 or customerservice@rfmd.com.  
DS141203  
The information in this publication is believed to be accurate. However, no responsibility is assumed by RF Micro Devices, Inc. ("RFMD") for its use, nor for any infringement of patents or other rights of  
third parties resulting from its use. No license is granted by implication or otherwise under any patent or patent rights of RFMD. RFMD reserves the right to change component circuitry, recommended  
application circuitry and specifications at any time without prior notice.  
12 of 20  
RFSA3714  
Evaluation Board Jumper Programming  
Jumpers  
Connector  
Signal  
Position  
U1 Connection  
VDD (From P6)  
VIO (From P5)  
GND  
Comment  
0
Logic  
Voltage  
S1  
1
P3  
0
1
Parallel Mode  
Serial Mode  
S2  
S6  
PBar/S  
LE  
U1_VDD  
OPEN  
INSTALLED  
LE  
All Other Modes  
Serial Mode Using P5  
P4  
LE (From P5 Pin 3)  
Note: Default jumper settings are BOLD.  
Evaluation Board Programming Using USB Interface  
Serial Mode  
All programming jumpers on the evaluation board are set to the default values indicated in the table. Refer to the  
Control Bit Generator (CBG) Software Reference Manual for detailed instructions on how to setup the software for use.  
Apply the supply voltage to P6. Select ‘RFSA3714’ from the RFMD parts list of the CBG user interface. Set the  
attenuation value using the CBG user interface. The attenuator is set to the desired state and measurement can be  
taken.  
Latched Parallel Mode  
Evaluation board programming jumper S2 is set to ‘0’. All other programming jumpers are not required and can be set  
to any position. Refer to the Control Bit Generator Software Reference Manual for detailed instructions on how to set  
up the software for use. Apply the supply voltage to P6. Select ‘RFSA3714-P’ from the RFMD part list of the CBG user  
interface. Set the attenuation value using the CBG user interface. The attenuator is set to the desired state and  
measurements can be taken.  
Evaluation Board Programming Using External Bus  
Serial Mode  
The configuration allows the user to control the attenuator through the P5 connector using an external harness.  
Remove the USB interface board if it is currently installed on the evaluation board. Connect a user-supplied harness to  
the P5 connector. Note that the top row of P5 contains the serial bus signals and the bottom row is ground.  
Programming jumper S1 is set to ‘0’ and S2 is set to ‘1’. Jumper S6 is installed and allows the LE signal to be routed  
from the P5 connector to the attenuator. Apply the supply voltage P6. Send the appropriate signals onto the serial bus  
lines in accordance with the Serial Mode Timing Diagram. The attenuator is set to the desired state and measurements  
can be taken.  
RF Micro Devices Inc. 7628 Thorndike Road, Greensboro, NC 27409-9421  
For sales or technical support, contact RFMD at +1.336.678.5570 or customerservice@rfmd.com.  
DS141203  
The information in this publication is believed to be accurate. However, no responsibility is assumed by RF Micro Devices, Inc. ("RFMD") for its use, nor for any infringement of patents or other rights of  
third parties resulting from its use. No license is granted by implication or otherwise under any patent or patent rights of RFMD. RFMD reserves the right to change component circuitry, recommended  
application circuitry and specifications at any time without prior notice.  
13 of 20  
RFSA3714  
Latched Parallel Mode  
This configuration allows the user to control the attenuator through the P1 connector using an external harness.  
Remove the USB interface it if is currently installed on the evaluation board. Connect a user-supplied harness to the  
P1 connector. The parallel bus signal names for P1 are indicated on the evaluation board. Programming jumper S2 is  
set to ‘0’ to select parallel mode. All other programming jumpers are not required and can be set to any position. Apply  
the supply voltage to P6. Send the appropriate signals onto the parallel bus lines in accordance with the Latched  
Parallel Mode Timing Diagram. The attenuator is set to the desired state and measurements can be taken.  
Direct Parallel Mode  
This configuration allows the user to control the attenuator through the P1 connector using an external harness. When  
using this mode the LE signal is held at logic high so that the attenuation will change immediately when there is a  
change in logic state for any of the parallel bus signals. Remove the USB interface if it is currently installed on the  
evaluation board. Connect a user-supplied harness to the P1 connector. The parallel bus signal names for P1 are  
indicated on the evaluation board. Programming jumper S2 is set to ‘0’ to select parallel mode. All other programming  
jumpers are not required and can be set to any position. Apply the supply voltage to P6. Send the appropriate signals  
onto the parallel bus lines. The attenuator is set to the desired state and measurements can be taken.  
Default Power-up State  
The default attenuation state is maximum (31.75dB) when supply voltage is applied to the attenuator in both serial and  
parallel modes. If a different attenuation state is desired during power up, this can be accomplished by applying signals  
according to the Parallel Mode Truth Table. The attenuator will power up to the state applied to the parallel bus during  
turn on. The LE signal must be held to logic ‘0’ during power up.  
RF Micro Devices Inc. 7628 Thorndike Road, Greensboro, NC 27409-9421  
For sales or technical support, contact RFMD at +1.336.678.5570 or customerservice@rfmd.com.  
DS141203  
The information in this publication is believed to be accurate. However, no responsibility is assumed by RF Micro Devices, Inc. ("RFMD") for its use, nor for any infringement of patents or other rights of  
third parties resulting from its use. No license is granted by implication or otherwise under any patent or patent rights of RFMD. RFMD reserves the right to change component circuitry, recommended  
application circuitry and specifications at any time without prior notice.  
14 of 20  
RFSA3714  
Pin Names and Descriptions  
Pin  
1
Name  
C0.25  
VDD  
Description  
0.25dB Parallel Control Bit  
Supply Voltage  
2
Mode Select Pin  
3
PBAR/S  
Logic Low = Parallel  
Logic High = Serial  
4
5
GND  
RFIN  
Ground Pin  
RF Input Pin, Incident RF power must enter this pin for rated thermal performance and reliability. Do not apply  
DC power to this pin. Pin may be DC grounded externally and is grounded thru resistors internal to the part.  
6
7
GND  
GND  
GND  
GND  
GND  
GND  
GND  
GND  
Ground Pin  
Ground Pin  
Ground Pin  
Ground Pin  
Ground Pin  
Ground Pin  
Ground Pin  
Ground Pin  
8
9
10  
11  
12  
13  
RF Output Pin; Do not apply DC power to this pin. Pin may be DC grounded externally and is grounded thru  
resistors internal to the part.  
14  
15  
16  
RFOUT  
GND  
LE  
Ground Pin  
Latch Enable, The leading edge of signal on LE causes the attenuator to change setting for serial and latched  
parallel modes. For direct parallel mode keep LE at a logic high level.  
17  
18  
19  
20  
21  
22  
23  
24  
CLK  
SI  
Serial Clock Input  
Serial Data Input  
C16  
C8  
16dB Parallel Control Bit  
8dB Parallel Control Bit  
4dB Parallel Control Bit  
2dB Parallel Control Bit  
1dB Parallel Control Bit  
0.5dB Parallel Control Bit  
C4  
C2  
C1  
C0.5  
RF Micro Devices Inc. 7628 Thorndike Road, Greensboro, NC 27409-9421  
For sales or technical support, contact RFMD at +1.336.678.5570 or customerservice@rfmd.com.  
DS141203  
The information in this publication is believed to be accurate. However, no responsibility is assumed by RF Micro Devices, Inc. ("RFMD") for its use, nor for any infringement of patents or other rights of  
third parties resulting from its use. No license is granted by implication or otherwise under any patent or patent rights of RFMD. RFMD reserves the right to change component circuitry, recommended  
application circuitry and specifications at any time without prior notice.  
15 of 20  
RFSA3714  
Serial Mode Attenuation Word Truth Table  
Attenuation Word  
Attenuation State  
D0  
(LSB)  
D7  
D6  
D5  
D4  
D3  
D2  
D1  
X
X
X
X
X
X
X
X
X
L
L
L
L
L
L
L
H
H
L
L
L
L
L
L
H
L
H
L
L
L
L
L
H
L
L
H
L
L
L
L
H
L
L
L
H
L
L
L
H
L
L
L
L
H
L
L
H
L
L
L
L
L
H
L
H
L
L
L
L
L
L
H
0dB / Reference Insertion Loss  
0.25dB  
0.5dB  
1dB  
2dB  
4dB  
8dB  
16dB  
31.75dB  
Serial Mode Timing Diagram  
PBAR/S X  
X
LE  
CLK  
SI  
X
D0  
D1  
D2  
D3  
D4  
D5  
D6  
D7  
X
Note: Bit D7 is not used and can be set to logic high or low  
RF Micro Devices Inc. 7628 Thorndike Road, Greensboro, NC 27409-9421  
For sales or technical support, contact RFMD at +1.336.678.5570 or customerservice@rfmd.com.  
DS141203  
The information in this publication is believed to be accurate. However, no responsibility is assumed by RF Micro Devices, Inc. ("RFMD") for its use, nor for any infringement of patents or other rights of  
third parties resulting from its use. No license is granted by implication or otherwise under any patent or patent rights of RFMD. RFMD reserves the right to change component circuitry, recommended  
application circuitry and specifications at any time without prior notice.  
16 of 20  
RFSA3714  
Parallel Mode Truth Table  
Parallel Input Control Setting  
Attenuation State  
D6  
D5  
D4  
D3  
D2  
D1  
D0  
(C16)  
(C8)  
(C4)  
(C2)  
(C1)  
(C0.5) (C0.25)  
L
L
L
L
L
L
L
H
H
L
L
L
L
L
L
H
L
H
L
L
L
L
L
H
L
L
H
L
L
L
L
H
L
L
L
H
L
L
L
H
L
L
L
L
H
L
L
H
L
L
L
L
L
H
L
H
L
L
L
L
L
L
H
0dB / Reference Insertion Loss  
0.25dB  
0.5dB  
1dB  
2dB  
4dB  
8dB  
16dB  
31.75dB  
Latched Parallel Mode Timing Diagram  
D[6:0]  
VALID  
X
X
D[6:0] External Parallel Attenuation Setting  
PBAR/S X  
X
LE  
RF Micro Devices Inc. 7628 Thorndike Road, Greensboro, NC 27409-9421  
For sales or technical support, contact RFMD at +1.336.678.5570 or customerservice@rfmd.com.  
DS141203  
The information in this publication is believed to be accurate. However, no responsibility is assumed by RF Micro Devices, Inc. ("RFMD") for its use, nor for any infringement of patents or other rights of  
third parties resulting from its use. No license is granted by implication or otherwise under any patent or patent rights of RFMD. RFMD reserves the right to change component circuitry, recommended  
application circuitry and specifications at any time without prior notice.  
17 of 20  
RFSA3714  
Serial Bus Timing Specifications  
Parameter  
Limit  
25  
20  
20  
5
Unit  
MHz max  
ns min  
ns min  
ns min  
ns min  
ns min  
ns min  
ns min  
ns min  
Comment  
CLK Frequency  
CLK High  
t1  
t2  
t3  
t4  
t5  
t6  
t7  
t8  
t9  
CLK Low  
SI to CLK Setup Time  
SI to CLK Hold Time  
SI Valid  
5
30  
5
LE to CLK Setup Time  
CLK to LE Setup Time  
LE Pulse Width  
5
10  
RF Micro Devices Inc. 7628 Thorndike Road, Greensboro, NC 27409-9421  
For sales or technical support, contact RFMD at +1.336.678.5570 or customerservice@rfmd.com.  
DS141203  
The information in this publication is believed to be accurate. However, no responsibility is assumed by RF Micro Devices, Inc. ("RFMD") for its use, nor for any infringement of patents or other rights of  
third parties resulting from its use. No license is granted by implication or otherwise under any patent or patent rights of RFMD. RFMD reserves the right to change component circuitry, recommended  
application circuitry and specifications at any time without prior notice.  
18 of 20  
RFSA3714  
Package Outline Drawing (Dimensions in millimeters)  
RF Micro Devices Inc. 7628 Thorndike Road, Greensboro, NC 27409-9421  
For sales or technical support, contact RFMD at +1.336.678.5570 or customerservice@rfmd.com.  
DS141203  
The information in this publication is believed to be accurate. However, no responsibility is assumed by RF Micro Devices, Inc. ("RFMD") for its use, nor for any infringement of patents or other rights of  
third parties resulting from its use. No license is granted by implication or otherwise under any patent or patent rights of RFMD. RFMD reserves the right to change component circuitry, recommended  
application circuitry and specifications at any time without prior notice.  
19 of 20  
RFSA3714  
Branding Diagram  
RF Micro Devices Inc. 7628 Thorndike Road, Greensboro, NC 27409-9421  
For sales or technical support, contact RFMD at +1.336.678.5570 or customerservice@rfmd.com.  
DS141203  
The information in this publication is believed to be accurate. However, no responsibility is assumed by RF Micro Devices, Inc. ("RFMD") for its use, nor for any infringement of patents or other rights of  
third parties resulting from its use. No license is granted by implication or otherwise under any patent or patent rights of RFMD. RFMD reserves the right to change component circuitry, recommended  
application circuitry and specifications at any time without prior notice.  
20 of 20  

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