DATA SHEET • SKY65338-21 TRANSMIT/RECEIVE FRONT-END MODULE

Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com

2

October 13, 2009 • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice • 201004C

TX_IN

1

2

3

9

8

7

10

11

12

6

5

4

GND

RX_OUT

V2

V1

ANT

S1347

Figure 2. SKY65338-21 Pinout – 12-Pin MCM

(Top View)

Table 1. SKY65338-21 Signal Descriptions

Pin #

Name

Description

Pin #

Name

Description

1

TX_IN

Transmit RF input

7

ANT

Antenna

2

GND

Ground

8

V2

Switch logic (see Table 1)

3

RX_OUT

Receive RF output

9

V1

Switch logic (see Table 1)

4

VC_BIAS

+3.6 V DC supply

10

VCC2

+3.6 V DC supply

5

VREF1

+3.6 V DC supply

11

PA_EN

PA enable switch

(On = 2.5-3.6 V; Off = 0-0.2 V)

6

VREF2

+3.6 V DC supply

12

VCC1

+3.6 V DC supply

Technical Description

The SKY65338-21 provides input and output amplifier stages, and

is internally matched for optimum efficiency. An active bias circuit

provides the input and output stages with excellent gain tracking

over temperature and voltage variations. The module operates

with positive DC voltages, and maintains high efficiency and good

linearity. The nominal operating voltage is 3.6 V for maximum

power, but the device can be operated at slightly lower voltages

for other mobile applications.

The SKY65338-21 is internally matched for optimum linearity and

efficiency. The input and output stages are independently

supplied using the VCC1 and VCC2 supply lines (pins 12 and 10,

respectively). The bias reference voltages for stages 1 and 2 are

supplied using common lines VREF1 and VREF2 (pins 5 and 6,

respectively). The DC control voltage that sets the bias for

stages 1 and 2 is supplied by the VC_BIAS signal, pin 4.

Operational Modes

The module’s receive and transmit modes are configured using

the V1 and V2 control signals (pins 9 and 8, respectively). The

transmit path provides an harmonic filter and high efficiency PA.

The receive path provides a low loss <1 dB bypass between the

antenna port and the receive port.

Electrical and Mechanical Specifications

The absolute maximum ratings of the SKY65338-21 are provided

in Table 2. The recommended operating conditions are specified

in Table 3 and electrical specifications are provided in Table 4.

Typical performance characteristics of the SKY65338-21 are

illustrated in Figures 3 through 10. The state of the SKY65338-21

is determiend by the logic provided in Table 5.