ISL84052IVZ
Renesas Electronics America Inc
IC SWITCH SP4TX2 100OHM 16TSSOP
Disponível31327 pcs
50ns, 40ns
2pC
3pF, 12pF
2pA (Typ)
-
±2V ~ 6V
6Ohm (Max)
ISL84052
Tube
2V ~ 12V
100Ohm
SP4T
4:1
-
2
16-TSSOP
16-TSSOP (0.173", 4.40mm Width)
Surface Mount
-40°C ~ 85°C (TA)
-
RFQ
MAX319CPA
Analog Devices Inc./Maxim Integrated
IC SWITCH SPDT X 1 35OHM 8DIP
Disponível5300 pcs
175ns, 145ns
3pC
8pF, 8pF
250pA
-85dB @ 1MHz
±4.5V ~ 20V
2Ohm (Max)
MAX319
Tube
10V ~ 30V
35Ohm
SPDT
2:1
-
1
8-PDIP
8-DIP (0.300', 7.62mm)
Through Hole
0°C ~ 70°C (TA)
-
RFQ
MAX4721EUA+
Analog Devices Inc./Maxim Integrated
IC SWITCH SPST-NOX2 4.5OHM 8UMAX
Disponível23996 pcs
80ns, 40ns
5pC
9pF
500pA
-110dB @ 1MHz
-
100mOhm
MAX4721
Tube
1.8V ~ 5.5V
4.5Ohm
SPST - NO
1:1
300MHz
2
8-uMAX/uSOP
8-TSSOP, 8-MSOP (0.118', 3.00mm Width)
Surface Mount
-40°C ~ 85°C (TA)
-
RFQ
MUX16ET
Analog Devices Inc.
IC MULTIPLEXER 16X1 28CDIP
Disponível4870 pcs
-
-
-
-
-
-
-
MUX16
Tube
-
-
-
-
-
-
28-CDIP
28-CDIP (0.600", 15.24mm)
Through Hole
-
-
RFQ
ADG619BRTZ-REEL
Analog Devices Inc.
IC SWITCH SPDTX1 6.5OHM SOT23-8
Disponível15978 pcs
120ns, 75ns
110pC
25pF
250pA
-67dB @ 1MHz
±2.7V ~ 5.5V
700mOhm
ADG619
Tape & Reel (TR)
2.7V ~ 5.5V
6.5Ohm
SPDT
2:1
190MHz
1
SOT-23-8
SOT-23-8
Surface Mount
-40°C ~ 85°C (TA)
-
RFQ
NLAS4051DTR2G
onsemi
IC MUX 8:1 26OHM 16TSSOP
Disponível174160 pcs
23ns, 23ns
12pC
10pF, 10pF
100nA
-
±3V
10Ohm
NLAS4051
Tape & Reel (TR)
2.5V ~ 5V
26Ohm
-
8:1
95MHz
1
16-TSSOP
16-TSSOP (0.173', 4.40mm Width)
Surface Mount
-55°C ~ 125°C (TA)
-
RFQ
DG333ADW-T1-E3
Vishay Siliconix
IC SWITCH SPDT X 4 45OHM 20SOIC
Disponível13412 pcs
175ns, 145ns
10pC
8pF
250pA
-80dB @ 1MHz
±4V ~ 22V
2Ohm (Max)
DG333
Tape & Reel (TR)
5V ~ 40V
45Ohm
SPDT
2:1
-
4
20-SOIC
20-SOIC (0.295", 7.50mm Width)
Surface Mount
-40°C ~ 85°C (TA)
-
RFQ
ADG442BRZ-REEL
Analog Devices Inc.
IC SWITCH SPST-NOX4 70OHM 16SOIC
Disponível22699 pcs
110ns, 60ns
1pC
4pF, 4pF
500pA
-100dB @ 1MHz
±15V
-
ADG442
Tape & Reel (TR)
12V
70Ohm
SPST - NO
1:1
-
4
16-SOIC
16-SOIC (0.154', 3.90mm Width)
Surface Mount
-40°C ~ 85°C (TA)
-
RFQ
DG2031DQ-T1-E3
Vishay Siliconix
IC SWITCH SPDTX2 750MOHM 10MSOP
Disponível6400 pcs
58ns, 49ns
4pC
117pF
1nA
-71dB @ 1MHz
-
50mOhm (Max)
DG2031
Tape & Reel (TR)
1.8V ~ 5.5V
750mOhm
SPDT
2:1
-
2
10-MSOP
10-TFSOP, 10-MSOP (0.118', 3.00mm Width)
Surface Mount
-40°C ~ 85°C (TA)
-
RFQ
DG9431EDY-T1-GE3
Vishay Siliconix
IC SWITCH SPDT X 1 30OHM 8SOIC
Disponível32319 pcs
75ns, 50ns
2pC
7pF
100pA
-
-
400mOhm
DG9431
Tape & Reel (TR)
2.7V ~ 12V
30Ohm
SPDT
1:2
-
1
8-SOIC
8-SOIC (0.154', 3.90mm Width)
Surface Mount
-40°C ~ 85°C (TA)
-
RFQ
MAX313FESE+
Analog Devices Inc./Maxim Integrated
IC SWITCH SPST-NOX4 10OHM 16SOIC
Disponível4503 pcs
225ns, 185ns
70pC
20pF, 20pF
1µA
-104dB @ 1MHz
±4.5V ~ 20V
50mOhm
MAX313
Tube
9V ~ 36V
10Ohm
SPST - NO
1:1
-
4
16-SOIC
16-SOIC (0.154', 3.90mm Width)
Surface Mount
-40°C ~ 85°C (TA)
-
RFQ
NJU4053BM
Nisshinbo Micro Devices Inc.
IC SWITCH SPDT X 3 160OHM 16DMP
Disponível73180 pcs
500ns, 500ns
-
5pF
100nA
-
-
5Ohm
NJU4053
Tube
3V ~ 18V
160Ohm
SPDT
2:1
-
3
16-DMP
16-SOIC (0.209', 5.30mm Width)
Surface Mount
-40°C ~ 85°C (TA)
-
RFQ
ADG706BRUZ
Analog Devices Inc.
IC MUX 16:1 4.5OHM 28TSSOP
Disponível5978 pcs
32ns, 16ns (Typ)
8pC
13pF, 180pF
100pA
-80dB @ 1MHz
±2.5V
-
ADG706
Tube
1.8V ~ 5.5V
4.5Ohm
-
16:1
25MHz
1
28-TSSOP
28-TSSOP (0.173', 4.40mm Width)
Surface Mount
-40°C ~ 85°C (TA)
-
RFQ
ADG849YKSZ-REEL
Analog Devices Inc.
IC SWITCH SPDTX1 600MOHM SC70-6
Disponível34504 pcs
15ns, 13ns
50pC
52pF
10pA (Typ)
-64dB @ 100kHz
-
50mOhm
ADG849
Tape & Reel (TR)
1.8V ~ 5.5V
600mOhm
SPDT
2:1
38MHz
1
SC-70-6
6-TSSOP, SC-88, SOT-363
Surface Mount
-40°C ~ 125°C (TA)
-
RFQ
ADG408BRZ-REEL
Analog Devices Inc.
IC MUX 8:1 100OHM 16SOIC
Disponível8773 pcs
-
20pC
11pF, 40pF
500pA
-85dB @ 100kHz
±15V
15Ohm (Max)
ADG408
Tape & Reel (TR)
12V
100Ohm
-
8:1
-
1
16-SOIC
16-SOIC (0.154", 3.90mm Width)
Surface Mount
-40°C ~ 85°C (TA)
-
RFQ
MAX4516CUK+T
Analog Devices Inc./Maxim Integrated
IC SWITCH SPST-NOX1 20OHM SOT23
Disponível28257 pcs
100ns, 75ns
10pC
9pF, 9pF
1nA
-
±1V ~ 6V
-
MAX4516
Tape & Reel (TR)
2V ~ 12V
20Ohm
SPST - NO
1:1
-
1
SOT-23-5
SC-74A, SOT-753
Surface Mount
0°C ~ 70°C (TA)
-
RFQ
ISL84052IB
Renesas Electronics America Inc
IC SWITCH SP4T X 2 100OHM 16SOIC
Disponível12790 pcs
50ns, 40ns
2pC
3pF, 12pF
2pA (Typ)
-
±2V ~ 6V
6Ohm (Max)
ISL84052
Bag
2V ~ 12V
100Ohm
SP4T
4:1
-
2
16-SOIC
16-SOIC (0.154", 3.90mm Width)
Surface Mount
-40°C ~ 85°C (TA)
-
RFQ
ADG526AKR
Analog Devices Inc.
IC MUX 16:1 450OHM 28SOIC
Disponível12260 pcs
300ns, 300ns
4pC
5pF, 44pF
1nA
-
±10.8V ~ 16.5V
22.5Ohm
ADG526
Tube
10.8V ~ 16.5V
450Ohm
-
16:1
-
1
28-SOIC
28-SOIC (0.295', 7.50mm Width)
Surface Mount
-40°C ~ 85°C (TA)
-
RFQ
MAX4053CEE
Analog Devices Inc./Maxim Integrated
IC SWITCH SPDT X 3 100OHM 16QSOP
Disponível15880 pcs
175ns, 150ns
2pC
2pF, 2pF
1nA
-90dB @ 100kHz
±2.7V ~ 8V
12Ohm (Max)
MAX4053
Tube
2V ~ 16V
100Ohm
SPDT
2:1
-
3
16-QSOP
16-SSOP (0.154', 3.90mm Width)
Surface Mount
0°C ~ 70°C (TA)
-
RFQ
TS5A3357DCUR
Texas Instruments
IC SWITCH SP3T X 1 15OHM 8VSSOP
Disponível75140 pcs
6.5ns, 3.7ns
3.4pC
4.5pF, 10.5pF
100nA
-62dB @ 10MHz
-
100mOhm
TS5A3357
Tape & Reel (TR)
1.65V ~ 5.5V
15Ohm
SP3T
3:1
334MHz
1
8-VSSOP
8-VFSOP (0.091", 2.30mm Width)
Surface Mount
-40°C ~ 85°C (TA)
-
RFQ
MAX320CUA
Analog Devices Inc./Maxim Integrated
IC SWITCH SPST-NOX2 35OHM 8UMAX
Disponível19163 pcs
150ns, 100ns
2pC
9pF, 9pF
100pA
-85dB @ 1MHz
±2.7V ~ 8V
300mOhm
-
Bulk
2.7V ~ 8V
35Ohm
SPST - NO
1:1
-
2
8-µMAX
8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
Surface Mount
0°C ~ 70°C (TA)
-
RFQ
DG303ACWE+
Analog Devices Inc./Maxim Integrated
IC SWITCH SPDT X 2 50OHM 16SOIC
Disponível3944 pcs
300ns, 250ns
12pC
14pF, 14pF
5nA
-74dB @ 500kHz
±5V ~ 18V
-
DG303
Tube
-
50Ohm
SPDT
2:1
-
2
16-SOIC
16-SOIC (0.295', 7.50mm Width)
Surface Mount
0°C ~ 70°C (TA)
-
RFQ
DG412LDY
Vishay Siliconix
IC SWITCH SPST-NOX4 17OHM 16SOIC
Disponível15090 pcs
19ns, 12ns
5pC
5pF, 6pF
250pA
-95dB @ 1MHz
±3V ~ 6V
-
DG412
Tube
2.7V ~ 12V
17Ohm
SPST - NO
1:1
280MHz
4
16-SOIC
16-SOIC (0.154", 3.90mm Width)
Surface Mount
-40°C ~ 85°C (TA)
-
RFQ
MAX4617ESE+T
Analog Devices Inc./Maxim Integrated
IC MUX 8:1 10OHM 16SOIC
Disponível14092 pcs
15ns, 10ns
3pC
5pF, 27pF
1nA
-96dB @ 100kHz
-
200mOhm
MAX4617
Tape & Reel (TR)
2V ~ 5.5V
10Ohm
-
8:1
-
1
16-SOIC
16-SOIC (0.154', 3.90mm Width)
Surface Mount
-40°C ~ 85°C (TA)
-
RFQ
DG409DY
Analog Devices Inc./Maxim Integrated
IC SWITCH SP4T X 2 100OHM 16SOIC
Disponível8950 pcs
150ns, 150ns
20pC
3pF, 14pF
500pA
-
±5V ~ 20V
15Ohm (Max)
-
Bag
5V ~ 34V
100Ohm
SP4T
4:1
-
2
16-SOIC
16-SOIC (0.154", 3.90mm Width)
Surface Mount
-40°C ~ 85°C (TA)
-
RFQ
TS5A22366YFCR
Texas Instruments
IC SWITCH SPDT X 2 1OHM 12DSBGA
Disponível86310 pcs
374ns, 325ns
168pC
48pF
50nA
-70dB @ 100kHz
-
100mOhm
TS5A22366
Tape & Reel (TR)
2.25V ~ 5.5V
1Ohm
SPDT
2:1
32MHz
2
12-DSBGA (1.57x1.17)
12-UFBGA, DSBGA
Surface Mount
-40°C ~ 85°C (TA)
-
RFQ
MAX4533CPP+
Analog Devices Inc./Maxim Integrated
IC SWITCH SPDT X 4 175OHM 20DIP
Disponível2796 pcs
250ns, 150ns
1.5pC
5pF
20nA
-66dB @ 1MHz
±4.5V ~ 18V
1Ohm
MAX4533
Tube
9V ~ 36V
175Ohm
SPDT
2:1
-
4
20-PDIP
20-DIP (0.300', 7.62mm)
Through Hole
0°C ~ 70°C (TA)
-
RFQ
SN74LVC1G66YZPR
Texas Instruments
IC SWITCH SPST-NOX1 10OHM 5DSBGA
Disponível207920 pcs
4.2ns, 5ns
-
6pF
100nA
-
-
-
74LVC1G66
Tape & Reel (TR)
1.65V ~ 5.5V
10Ohm
SPST - NO
1:1
300MHz
1
5-DSBGA (1.4x0.9)
5-XFBGA, DSBGA
Surface Mount
-40°C ~ 85°C (TA)
-
RFQ
TS3A24159DGSR
Texas Instruments
IC SWITCH SPDTX2 300MOHM 10VSSOP
Disponível77340 pcs
35ns, 25ns
9pC
90pF
10nA
-96dB @ 1MHz
-
10mOhm
TS3A24159
Tape & Reel (TR)
1.65V ~ 3.6V
300mOhm
SPDT
2:1
23MHz
2
10-VSSOP
10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
Surface Mount
-40°C ~ 85°C (TA)
-
RFQ
FSA1156L6X
Fairchild Semiconductor
IC SW SPST-NOX1 900MOHM 6MICROPK
Disponível130420 pcs
20ns, 30ns
20pC
20pF
2nA
-
-
-
-
Bulk
1.65V ~ 5.5V
900mOhm
SPST - NO
1:1
300MHz
1
6-MicroPak
6-UFDFN
Surface Mount
-40°C ~ 85°C (TA)
-
RFQ
NJU4051BM
Nisshinbo Micro Devices Inc.
IC MUX 8:1 600OHM 16DMP
Disponível16340 pcs
500ns, 500ns
-
5pF
100nA
-
-
-
-
Tube
3V ~ 18V
600Ohm
-
8:1
-
1
16-DMP
16-SOIC (0.209', 5.30mm Width)
Surface Mount
-40°C ~ 85°C (TA)
-
RFQ
DG2730DN-T1-GE4
Vishay Siliconix
IC SWITCH DPDTX1 8OHM 10MINIQFN
Disponível40660 pcs
30ns, 25ns
0.5pC
2.2pF
100nA
-45dB @ 240MHz
-
800mOhm
DG2730
Tape & Reel (TR)
2.7V ~ 4.3V
8Ohm
DPDT
2:2
900MHz
1
10-miniQFN (1.4x1.8)
10-UFQFN
Surface Mount
-40°C ~ 85°C (TA)
-
RFQ
NLAST4501DFT2
onsemi
IC SWITCH SPST-NOX1 25OHM SC88A
Disponível17620 pcs
9ns, 10ns
3pC
10pF, 10pF
1nA
-
-
-
NLAST45
Tape & Reel (TR)
2V ~ 5.5V
25Ohm
SPST - NO
1:1
220MHz
1
SC-88A (SC-70-5/SOT-353)
5-TSSOP, SC-70-5, SOT-353
Surface Mount
-55°C ~ 125°C (TA)
-
RFQ
MC74HC4316AFEL
onsemi
SPST, 4 FUNC, CMOS
Disponível206030 pcs
-
-
-
-
-
-
-
74HC4316
Bulk
-
-
-
-
-
-
-
-
-
-
*
RFQ
SN74LV4053ADGVR
Texas Instruments
IC SWITCH SPDT X 3 75OHM 16TVSOP
Disponível174710 pcs
14ns, 14ns
-
0.5pF, 8.2pF
100nA
-45dB @ 1MHz
-
1.3Ohm
74LV4053
Tape & Reel (TR)
2V ~ 5.5V
75Ohm
SPDT
2:1
50MHz
3
16-TVSOP
16-TFSOP (0.173", 4.40mm Width)
Surface Mount
-40°C ~ 85°C (TA)
-
RFQ
DG411DY-T
Intersil
IC SWITCH SPST-NCX4 35OHM 16SOIC
Disponível8660 pcs
175ns, 145ns
5pC
9pF, 9pF
100pA
-85dB @ 1MHz
±5V ~ 20V
-
-
Bulk
5V ~ 44V
35Ohm
SPST - NC
1:1
-
4
16-SOIC
16-SOIC (0.154", 3.90mm Width)
Surface Mount
-40°C ~ 85°C (TA)
-
RFQ
ADG1608BCPZ-REEL7
Analog Devices Inc.
IC MUX 8:1 4.5OHM 16LFCSP
Disponível9676 pcs
94ns, 93ns
29pC
19pF, 117pF
100pA
-64dB @ 1MHz
±3.3V ~ 8V
120mOhm
ADG1608
Tape & Reel (TR)
3.3V ~ 16V
4.5Ohm
-
8:1
40MHz
1
16-LFCSP (3x3)
16-WFQFN Exposed Pad, CSP
Surface Mount
-40°C ~ 125°C (TA)
-
RFQ
ADG508FBRNZ
Analog Devices Inc.
IC MUX 8:1 270OHM 16SOIC
Disponível4592 pcs
230ns, 130ns
15pC
3pF, 22pF
1nA
-
±15V
8.1Ohm
ADG508
Tube
15V
270Ohm (Typ)
-
8:1
-
1
16-SOIC
16-SOIC (0.154', 3.90mm Width)
Surface Mount
-40°C ~ 85°C (TA)
-
RFQ
CD74HC4316M96
Texas Instruments
IC SW SPST-NOX4 170OHM 16SOIC
Disponível139960 pcs
37ns, 37ns
-
5pF
100nA
-
±1V ~ 5V
5Ohm
74HC4316
Tape & Reel (TR)
2V ~ 6V
170Ohm
SPST - NO
1:1
200MHz
4
16-SOIC
16-SOIC (0.154', 3.90mm Width)
Surface Mount
-55°C ~ 125°C (TA)
-
RFQ
SN74LVC1G66QDCKRQ1
Texas Instruments
IC SWITCH SPST-NOX1 25OHM SC70-5
Disponível176310 pcs
7.2ns, 6.9ns
-
6pF
100nA
-
-
-
74LVC1G66
Tape & Reel (TR)
1.65V ~ 5.5V
25Ohm
SPST - NO
1:1
300MHz
1
SC-70-5
5-TSSOP, SC-70-5, SOT-353
Surface Mount
-40°C ~ 125°C (TA)
Automotive, AEC-Q100
RFQ
MAX4704EUB+
Analog Devices Inc./Maxim Integrated
IC SWITCH SP4T X 1 60OHM 10UMAX
Disponível23569 pcs
60ns, 20ns
2pC
7pF
100pA
-90dB @ 1MHz
-
1Ohm
MAX4704
Tube
1.8V ~ 5.5V
60Ohm
SP4T
4:1
200MHz
1
10-uMAX/uSOP
10-TFSOP, 10-MSOP (0.118', 3.00mm Width)
Surface Mount
-40°C ~ 85°C (TA)
-
RFQ
SN74LV4053ATPWRQ1
Texas Instruments
IC SWITCH SPDT X 3 75OHM 16TSSOP
Disponível113620 pcs
14ns, 14ns
-
0.5pF, 8.2pF
100nA
-45dB @ 1MHz
-
1.3Ohm
74LV4053
Tape & Reel (TR)
2V ~ 5.5V
75Ohm
SPDT
2:1
50MHz
3
16-TSSOP
16-TSSOP (0.173", 4.40mm Width)
Surface Mount
-40°C ~ 105°C (TA)
Automotive, AEC-Q100
RFQ
DG413DY-T1
Vishay Siliconix
IC SW SPST-NO/NCX4 35OHM 16SOIC
Disponível14010 pcs
175ns, 145ns
5pC
9pF, 9pF
250pA
-85dB @ 1MHz
±5V ~ 20V
-
DG413
Tape & Reel (TR)
5V ~ 44V
35Ohm
SPST - NO/NC
1:1
-
4
16-SOIC
16-SOIC (0.154", 3.90mm Width)
Surface Mount
-40°C ~ 85°C (TA)
-
RFQ
DG211BDY
Vishay Siliconix
IC SWITCH SPST-NCX4 85OHM 16SOIC
Disponível9570 pcs
300ns, 200ns
1pC
5pF, 5pF
500pA
-95dB @ 100kHz
±4.5V ~ 22V
2Ohm
DG211
Tube
4.5V ~ 25V
85Ohm
SPST - NC
1:1
-
4
16-SOIC
16-SOIC (0.154", 3.90mm Width)
Surface Mount
-40°C ~ 85°C (TA)
-
RFQ
MAX4618CSE+T
Analog Devices Inc./Maxim Integrated
IC SWITCH SP4T X 2 10OHM 16SOIC
Disponível14436 pcs
15ns, 10ns
3pC
5pF, 15pF
1nA
-96dB @ 100kHz
-
200mOhm
MAX4618
Tape & Reel (TR)
2V ~ 5.5V
10Ohm
SP4T
4:1
-
2
16-SOIC
16-SOIC (0.154', 3.90mm Width)
Surface Mount
0°C ~ 70°C (TA)
-
RFQ
PS391ESE
Diodes Incorporated
IC SWITCH SPST-NCX4 45OHM 16SOIC
Disponível9640 pcs
130ns, 75ns
3pC
12pF, 12pF
100pA
-90dB @ 1MHz
±3V ~ 8V
500mOhm
PS391
Tube
3V ~ 15V
45Ohm
SPST - NC
1:1
100MHz
4
16-SOIC
16-SOIC (0.295', 7.50mm Width)
Surface Mount
-40°C ~ 85°C (TA)
-
RFQ
SN74LVC2G53YEAR
Texas Instruments
IC SWITCH SPDT X 1 13OHM 8XFBGA
Disponível7840 pcs
4.5ns, 8ns
-
10pF
100nA
-58dB @ 1MHz
-
2Ohm (Max)
SN74LVC2G
Tape & Reel (TR)
1.65V ~ 5.5V
13Ohm
SPDT
2:1
300MHz
1
8-XFBGA, DSBGA
8-XFBGA, DSBGA
Surface Mount
-40°C ~ 85°C (TA)
-
RFQ
ISL84544CB
Intersil
IC SWITCH SPDT X 1 60OHM 8SOIC
Disponível76330 pcs
100ns, 75ns
1pC
8pF, 8pF
100pA
-90dB @ 1MHz
-
800mOhm
-
Tube
2.7V ~ 12V
60Ohm
SPDT
2:1
-
1
8-SOIC
8-SOIC (0.154", 3.90mm Width)
Surface Mount
0°C ~ 70°C (TA)
-
RFQ
DG390BDJ
Vishay Siliconix
IC SWITCH SPDT X 2 50OHM 16DIP
Disponível7720 pcs
150ns, 130ns (Typ)
10pC
14pF, 14pF
5nA
-74dB @ 500kHz
±7V ~ 22V
-
DG390
Tube
13V ~ 36V
50Ohm
SPDT
2:1
-
2
16-PDIP
16-DIP (0.300", 7.62mm)
Through Hole
-40°C ~ 85°C (TA)
-
RFQ
ADG436BR
Analog Devices Inc.
IC SWITCH SPDT X 2 12OHM 16SOIC
Disponível5020 pcs
70ns, 60ns (Typ)
10pC
13pF
250pA
-90dB @ 1MHz
±3V ~ 20V
1Ohm
ADG436
Tube
3V ~ 30V
12Ohm (Typ)
SPDT
2:1
-
2
16-SOIC
16-SOIC (0.154", 3.90mm Width)
Surface Mount
-40°C ~ 85°C (TA)
-
RFQ