HWS379 GaAs DC-6 GHz DP4T Switch September 2005 V4 QFN16L (4 x 4 mm) Features •Combination of 1 DPDT and 2 SPDT switches •Low Insertion Loss : 1.30 dB @ 2.50 GHz 1.55 dB @ 5.85 GHz Isolation: 26 dB @ 2.50 GHz • 19 dB @ 5.85 GHz • Flexible selection of 2.5/5.8 GHz Tx/Rx ports • Low DC Power Consumption • Miniature QFN16L (4x4 mm) Plastic Package • PHEMT process Description The HWS379 is a GaAs PHEMT MMIC DP4T switch operating at DC-6 GHz in a low cost miniature QFN16L (4 x 4 mm) plastic package. The HWS379 combines one DPDT switch and two SPDT switches in a single IC and features low insertion loss and high isolation with very low DC power consumption. This switch can be used in IEEE 802.11a/b/g WLAN systems for combination of transmit/receive and antenna diversity functions. Two antenna ports can be selected for antenna diversity function and four RF ports can be arbitrary chosen for 2.5 GHz band or 5.85 GHz band as transmit/receive functions. Electrical Specifications at 25°C with 0, +3V Control Voltages Parameter Typ. Max. Unit 0.01-6.00 GHz 2.40-2.50 GHz 5.15-5.85 GHz 1.60 1.30 1.55 1.50 1.85 dB dB dB Isolation (SPDT part) 0.01-6.00 GHz 2.40-2.50 GHz 25 dB 26 dB Ex: ANT1 to RF2 when ANT1 to RF1 is on 5.15-5.85 GHz 24 27 dB Isolation (DPDT part) 0.01-6.00 GHz 2.40-2.50 GHz 16 19 27 19 dB dB dB 5.15-5.85 GHz 12 20 15 dB dB dB 2.00-6.00 GHz 30 dBm Switching Time 70 nsec Control Current 30 Insertion Loss ANT ports to RF ports Ex: ANT2 to RF1 when ANT1 to RF1 is on Return Loss Input Power for One dB Compression Test Conditions 5.15-5.85 GHz 0.01-6.00 GHz 2.40-2.50 GHz Min. 300 uA Note: All measurements made in a 50 ohm system with 0/+3.0V control voltages, unless otherwise specified. Hexawave Inc. 2 Prosperity Road II, Science-Based Industrial Park, Hsinchu, Taiwan. TEL 886-3-578-5100 FAX 886-3-577-0512 http://www.hw.com.tw All specifications are subject to change without notice. HWS379 GaAs DC-6 GHz DP4T Switch September 2005 Absolute Maximum Ratings Typical Performance Data with 8pF Capacitors @ +25°C Parameter Absolute Maximum RF Input Power +32 dBm @ +3V -0.8 Control Voltage +6V -1.0 Operating Temperature -40°C to +85°C Storage Temperature -65°C to +150°C Insertion Loss vs Frequency -1.2 -1.4 -1.6 3.0 3.5 4.0 4.5 5.0 Frequency(GHz) 5.5 6.0 SPDT part DPDT part Isolation vs Frequency 15 CB ANT1 -15 CB ANT2 -20 GND GND 1 12 2 11 3 10 4 9 5 6 7 GND CB RF2 RF3 GND 8 RF4 CB -30 VC4 VC3 GND -25 -35 -40 2.0 2.5 3.0 3.5 4.0 4.5 5.0 Frequency(GHz) 5.5 6.0 Pin Out (Top View) Note: 1. DC blocking capacitors CB=8pF are required on all RF ports. Return Loss vs Frequency 2. Exposed pad in the bottom must be connected to ground by via holes. -5 -10 Return Loss(dB) 13 14 CB -10 Isolation(dB) 16 GND 2.5 CB 2.0 VC2 -1.8 VC1 RF1 Insertion Loss(dB) V4 Logic Table for Switch On-Path -15 VC1 -20 0 1 1 -25 VC3 VC2 VC4 ANT1 ANT2 1 0 RF1 RF3 0 1 0 RF3 RF1 0 1 0 1 RF2 RF4 1 0 0 1 RF4 RF2 -30 2.0 2.5 3.0 3.5 4.0 4.5 Frequency(GHz) 5.0 5.5 6.0 ‘1’ = +3V to +5V ‘0’ = 0V to +0.2V Hexawave Inc. 2 Prosperity Road II, Science-Based Industrial Park, Hsinchu, Taiwan. TEL 886-3-578-5100 FAX 886-3-577-0512 http://www.hw.com.tw All specifications are subject to change without notice. HWS379 GaAs DC-6 GHz DP4T Switch September 2005 V4 Application Information Simplified Application Block Diagram Between HWS379 and WLAN 802.11 a/b/g RFIC Band Select Antenna Select ANT2 ANT1 Antenna SelectInv VC1 VC3 VC2 Band SelectInv VC4 WLAN 802.11a/b/g RFIC RF1 LB_RX RF2 HB_RX RF3 LB_TX RF4 HB_TX HWS379 DP4T Switch Note: 1. VC1 and VC3 are used for antenna selection, while VC2 and VC4 are used for band selection. 2. LB_RX stands for low-band(2.5 GHz band) receiving port and HB_TX stands for high-band(5.85 GHz band) transmitting port. 3. RF paths between switch and RFIC may include amplifiers, filters, and baluns. Logic Table for Switch On-Path VC1 VC3 (AntennaSelect) (AntennaSelectInv) VC2 VC4 (BandSelect) (BandSelectInv) ANT1 ANT2 0 1 1 0 RF1(LB_RX) RF3(LB_TX) 1 0 1 0 RF3(LB_TX) RF1(LB_RX) 0 1 0 1 RF2(HB_RX) RF4(HB_TX) 1 0 0 1 RF4(HB_TX) RF2(HB_RX) Hexawave Inc. 2 Prosperity Road II, Science-Based Industrial Park, Hsinchu, Taiwan. TEL 886-3-578-5100 FAX 886-3-577-0512 http://www.hw.com.tw All specifications are subject to change without notice. HWS379 GaAs DC-6 GHz DP4T Switch September 2005 V4 Application Information (Continued) Simplified Application Block Diagram Between HWS379 and WLAN 802.11 a/b/g RFIC Band Select Antenna Select ANT2 ANT1 Antenna SelectInv VC1 VC3 Band SelectInv VC2 VC4 WLAN 802.11a/b/g RFIC RF1 HB_RX RF2 LB_RX RF3 HB_TX RF4 LB_TX HWS379 DP4T Switch Note: 1. VC1 and VC3 are used for antenna selection, while VC2 and VC4 are used for band selection. 2. LB_RX stands for low-band(2.5 GHz band) receiving port and HB_TX stands for high-band(5.85 GHz band) transmitting port. 3. RF paths between switch and RFIC may include amplifiers, filters, and baluns. Logic Table for Switch On-Path VC1 VC3 (AntennaSelect) (AntennaSelectInv) VC2 VC4 (BandSelect) (BandSelectInv) ANT1 ANT2 0 1 1 0 RF1(HB_RX) RF3(HB_TX) 1 0 1 0 RF3(HB_TX) RF1(HB_RX) 0 1 0 1 RF2(LB_RX) RF4(LB_TX) 1 0 0 1 RF4(LB_TX) RF2(LB_RX) Hexawave Inc. 2 Prosperity Road II, Science-Based Industrial Park, Hsinchu, Taiwan. TEL 886-3-578-5100 FAX 886-3-577-0512 http://www.hw.com.tw All specifications are subject to change without notice.