Datasheet SW-488TR, SW-488TR-3000, SW-488SMB Datasheet (M A COM)

PRELIMINARY INFORMATION

VDD

TXS

GND WCDMA

GND ANT1 GND

Decoder

2 V Dual-Mode WCDMA & Dual-Band GSM/DCS Switch SW-488

VER 1.

0.5 – 2.0 GHz

Rev 1.2

Features

• GSM Power Handling with +2.0 V Control

Voltage
Low Power Consumption. Less than 1µA

•

current in Receive mode.

• Integrated Decoder.

• Leadless 4 x 4mm FQFP -N, 20 Pin Package.

• Low Insertion Loss, 0.3 dB in GSM Transmit

mode.

Description

The M/A-COM SW-488 is a GaAs monolithic
switch in a low cost, FQFP -N, surface mount plastic
package. The SW-488 is ideally suited for
applications where very low power consumption,
high power handling, and low cost are required. The
SW-488 includes an integrated decoder. The switch
offers GSM power handling with below +2.5V
control voltage. The supply voltage VDD should be
connected to the highest available voltage.

The SW-488 is fabricated using a new 0.5-micron
gate length GaAs pHEMT process. The process
features full chip passivation for increased
performance and reliability. This switch is designed
for Dual Mode WCDMA/GSM/DCS handsets
where the phone needs to be able to simultaneously
receive a WCDMA and GSM signal.

Functional Schematic

Ordering Information

Part Number Description

SW-488TR SW-488 on 1000 Piece Tape and Reel
SW-488TR-3000 SW-488 on 3000 Piece Tape and Reel
SW-488SMB SW-488 Sample Test Board

* If specific reel size is required, consult factory for part number
assignment

ANT2

GND

GRX

GND

GTX

GND

DRX

DRXS

GND

DTX

GND

BS

PRXON

The Prelim inary Specifications Data Sheet Contains Typical Electrical Specifications Which May Change Prior to Final Introduction.

M/A-COM, Inc.

North America: Tel. [phone] ♦ Asia/Pacific: Tel. [phone] ♦ Europe: Tel. [phone]
Fax [phone] Fax [phone] Fax [phone]

1

2V Control, Dual -Mode WCDMA & Dual -Band GSM/DCS Tx/Rx Switch SW -488

ELECTRICAL CHARACTERISTICS: Test Conditions: VDD = 2.5V, Vctrl =2.0V, T

= +25 °C

A

V1.2

Mode Specifications Freq. (MHz) Units Min. Typ. Max.
ANT2 -> GSM RX

ANT1 -> UMTS Tx
ANT1 -> UMTS Rx
Isolation ANT1 to DCS Tx

Insertion Loss
Insertion Loss
Insertion Loss

Isolation ANT2 to GSM Tx
Isolation UMTS to DCS Rx
Isolation UMTS to GSM Rx
Isolation UMTS to GSM Tx
Isolation DCS Tx to DCS Rx
Isolation DCS Tx to GSM Rx
Isolation GSM Tx to DCS Rx
Isolation GSM Tx to GSM Rx

925 -960
1920-1980
2110-2170
1710-1785

880 – 915
1920 –1980
1920 –1980
1920 –1980

1710 – 1785
1710 – 1785

880 – 915

880 - 915

dB
dB
dB
dB
dB
dB
dB
dB

dB
dB
dB
dB

0.54

0.65

0.7
22
15
30
30
30
30
30
30

15

0.6

0.7

0.75
22
15
30
30
30
30
30
30
15

0.7

0.9

0.95
22
15
30
30
30
30
30
30
15

ANT1 -> DCS RX Insertion Loss 1805 -1880 dB 0.74 0.8 0.9
Isolation ANT1 to DCS Tx

Isolation ANT2 to GSM Tx
Isolation DCS Tx to DCS Rx

Isolation DCS Tx to GSM Rx
Isolation GSM Tx to DCS Rx
Isolation GSM Tx to GSM Rx

1710 – 1785

880 – 915

1710 – 1785
1710 – 1785

880 – 915

880 - 915

dB
dB
dB
dB
dB
dB

20
10
20
30
30
30

20
10
20
30
30
30

20
10
20
30
30
30

ANT2 -> GSM TX Insertion Loss 880 – 915 dB 0.24 0.3 0.4
Isolation GSM Tx to UMTS

Isolation GSM Tx to DCS Rx
Isolation GSM Tx to GSM Rx

Isolation DCS Tx to DCS Rx
Isolation DCS Tx to GSM Rx

880 – 915
880 – 915
880 – 915

1710 – 1785

1710 – 1785

dB
dB
dB
dB
dB

30

30

30

30

30

30

25

25

25

30

30

30

30

30

30

ANT1 -> DCS TX Insertion Loss 1710 –1785 dB 0.54 0.6 0.7
Isolation DCS Tx to UMTS

Isolation DCS Tx to DCS Rx
Isolation DCS Tx to GSM Rx
Isolation GSM Tx to DCS Rx
Isolation GSM Tx to GSM Rx

1710 –1785
1710 –1785
1710 –1785

880 – 915
880 – 915

dB
dB
dB
dB

dB

20

20

20

30

30

30

30

30

30

30

30

30

30

30

30

2nd Harmonics See attached data dBc -84 -80 -70
3rd Harmonics See attached data dBc -79 -76 -65
Supply Voltage Volts 2.0 2.5 4.0
High Control Voltages Volts 2.0 2.5 4.0
Low Control Voltages Volts -0.2 0 0.2

1. DC blocking capacitors are required on all RF and shunt ports.

2. All impedances are 50 ohms

The Preliminary Specifications Data Sheet Contains Typical Electrical Specifications Which May Change Prior to Final Introduction.

M/A-COM, Inc.

North America: Tel. [phone] ♦ Asia/Pacific: Tel. [phone] ♦ Europe: Tel. [phone]
Fax [phone] Fax [phone] Fax [phone]

2

2V Control, Dual -Mode WCDMA & Dual -Band GSM/DCS Tx/Rx Switch SW -488

VDD

BS

TXS

WCDMA

ANT1

Decoder

V1.2

Pin Configuration

Pin No. Pin Name Description

1

ANT2 GSM ANT Port

2

GND RF Ground

3

GRX GSM Rx Port

4

GND RF Ground

5

GTX GSM Tx Port

6

GND Decoder GND

7

VDD Decoder Vdd

8

BS Control 1

9

TXS Control 2

10

PRXON Control 3

11

GND RF Ground

12

DCS TX DCS Tx Port

13

GND RF Ground

14

DCSRX_S DCS Rx Shunt

15

DCSRX DCS Rx Port

16

GND RF Ground

17

ANT 1 WCDMA/DCS ANT

18

GND RF Ground

19

WCDMA WCDMA Port

20

GND RF Ground

21

GND Paddle

Block Diagram

GND

GND

GND

ANT2

GND

GRX

GND

GTX

GND

DRX

DRXS

GND

DTX

GND

PRXON

Truth Table

BS TXS PRXON

0 0 0
0 1 0 GSM TX – ANT2

1 1 0 DCS TX – ANT1
1 0 0 DCS RX – ANT1

Logic Level Voltage Level

VLo “0”= 0 V

VHi “1”= 2.5 V

MODE
GSM RX – ANT2
WCDMA – ANT1

The Preliminary Specifications Data Sheet Contains Typical Electrical Specifications Which May Change Prior to Final Introduction.

M/A-COM, Inc.

North America: Tel. [phone] ♦ Asia/Pacific: Tel. [phone] ♦ Europe: Tel. [phone]
Fax [phone] Fax [phone] Fax [phone]

3

2V Control, Dual -Mode WCDMA & Dual -Band GSM/DCS Tx/Rx Switch SW -488

Ref. Designation

Value

Purpose

C7 C8

C4 C5 C6

C1 C2 C3

Decoder

V1.2

Sample Board Schematic

ANT2

GRX

GTX

WCDMA

VDD BS TXS PRXON

ANT1

DRX

DTX

External Circuitry Parts List (Note: Values of external elements not final)

C1 22 pF DC Block
C2 22 pF DC Block
C3 22 pF DC Block
C4 22 pF DC Block
C5 4.7 pF RF Shunt
C6 22 pF DC Block
C7 22 pF DC Block
C8 22 pF DC Block

M/A-COM, Inc.

North America: Tel. [phone] ♦ Asia/Pacific: Tel. [phone] ♦ Europe: Tel. [phone]
Fax [phone] Fax [phone] Fax [phone]

The Preliminary Specifications Data Sheet Contains Typical Electrical Specifications Which May Change Prior to Final Introduction.

4

2V Control, Dual -Mode WCDMA & Dual -Band GSM/DCS Tx/Rx Switch SW -488

dBm

dBm

0

-10

-20

SW-488 Harmonics at the GSM TX Port versus Pin

Vdd=2.5V; Vcontrol=2.5V

V1.2

-30

-40

-50

-60

-70
28 29 30 31 32 33 34 35

SW-488 Harmonics at the DCS TX Port versus Pin

0

-10

-20

-30

dBm

-40

-50

-60

-70
26 27 28 29 30 31 32 33

SW-488 Harmonics at the WCDMA Port versus Pin

0

Pin (dBm)

Vdd=2.5V; Vcontrol=2.5V

Pin(dBm)

Vdd=2.5V; Vcontrol=2.5V

GSM 2H
GSM 3H

DCS 2H
DCS 3H

-10

-20

-30

-40

-50

-60

-70
24 25 26 27 28 29 30

Pin(dBm)

WCDMA 2H
WCDMA 3H

The Preliminary Specifications Data Sheet Contains Typical Electrical Specifications Which May Change Prior to Final Introduction.

M/A-COM, Inc.

North America: Tel. [phone] ♦ Asia/Pacific: Tel. [phone] ♦ Europe: Tel. [phone]
Fax [phone] Fax [phone] Fax [phone]

5

2V Control, Dual -Mode WCDMA & Dual -Band GSM/DCS Tx/Rx Switch SW -488

4 mm FQFP-N, 20-Lead

V1.2

E2

A

A2

A3
A1

D

D1

E E1

20 x b

D2

e

4 x e

L

e

4 x e

Measur ement (mm) Dimension

Min. Nom. Max.

A

A1
A2
A3

b

D
D1
D2

e

E
E1
E2

L

0.80

0
0

0.18

0.75

0.75

0.35

0.90

0.02

0.65

0.25 ref.

0.23

4.00 basic

3.75 basic

1.70

0.50 basic

4.00 basic

3.75 basic

1.70

0.55

1.00

0.05

1.00

0.30

2.25

2.25

0.75

Note: See JEDEC MO -220A VGGD-1 for additional dimensional and
tolerance information

The Preliminary Specifications Data Sheet Contains Typical Electrical Specifications Which May Change Prior to Final Introduction.

M/A-COM, Inc.

North America: Tel. [phone] ♦ Asia/Pacific: Tel. [phone] ♦ Europe: Tel. [phone]
Fax [phone] Fax [phone] Fax [phone]

6