MAX982CUA-T
Analog Devices Inc./Maxim Integrated
IC COMPARATOR 2 W/VOLT REF 8UMAX
Á lager6710 pcs
2.5V ~ 11V, ±1.25V ~ 5.5V
10mV @ 5V
-
0.015mA @ 5V
6µA
80dB CMRR, 80dB PSRR
-
50mV
2
MAX982
Tape & Reel (TR)
-
0°C ~ 70°C
Surface Mount
with Voltage Reference
Open Drain
8-TSSOP, 8-MSOP (0.118', 3.00mm Width)
8-uMAX/uSOP
RFQ
MAX908ESD
Analog Devices Inc./Maxim Integrated
IC COMPARATOR 4 GEN PUR 14SOIC
Á lager9650 pcs
4.5V ~ 11V, ±2.25V ~ 5.5V
2mV @ 5V
0.3µA @ 5V
-
1mA
-82dB, -82dB
50ns
-
4
MAX908
Bulk
MAX908
-40°C ~ 85°C
Surface Mount
General Purpose
Push-Pull, TTL
14-SOIC (0.154", 3.90mm Width)
14-SOIC
RFQ
MAX932ESA+
Analog Devices Inc./Maxim Integrated
IC COMPARATOR 2 W/VOLT REF 8SOIC
Á lager11453 pcs
2.5V ~ 11V, ±1.25V ~ 5.5V
10mV @ 5V
-
0.015mA @ 5V
6µA
80dB CMRR, 80dB PSRR
12µs
50mV
2
MAX932
Tube
-
-40°C ~ 85°C
Surface Mount
with Voltage Reference
CMOS, TTL
8-SOIC (0.154', 3.90mm Width)
8-SOIC
RFQ
TS864AIDT
STMicroelectronics
IC COMPARATOR 4 GEN PUR 14SO
Á lager8810 pcs
2.7V ~ 10V
7mV @ 5V
300pA @ 5V
-
16µA
70dB CMRR
2µs
-
4
TS864
Tape & Reel (TR)
-
-40°C ~ 85°C
Surface Mount
General Purpose
Push-Pull
14-SOIC (0.154', 3.90mm Width)
14-SO
RFQ
LT6700IS6-1#TRM
Linear Technology
IC COMPARATOR 2 GEN PUR TSOT23-6
Á lager16230 pcs
1.4V ~ 18V
-
0.01µA @ 18V
-
17µA
-
29µs
11.5mV
2
-
Bulk
Over-The-Top®
-40°C ~ 85°C
Surface Mount
General Purpose
Open Collector
SOT-23-6 Thin, TSOT-23-6
TSOT-23-6
RFQ
TLV7011DCKR
Texas Instruments
IC COMPARATOR 1 SC70-5
Á lager129240 pcs
1.6V ~ 5.5V
8mV
1pA
-
5µA
78dB CMRR, 78dB PSRR
350ns
4.2mV
1
TLV7011
Tape & Reel (TR)
-
-40°C ~ 125°C
Surface Mount
-
Push-Pull
5-TSSOP, SC-70-5, SOT-353
SC-70-5
RFQ
LM311M
Texas Instruments
IC COMPARATOR 1 GEN PUR 8SOIC
Á lager57690 pcs
5V ~ 36V, ±2.5V ~ 18V
7.5mV @ ±15V
0.25µA @ ±15V
-
7.5mA
-
-
-
1
LM311
Tube
-
0°C ~ 70°C
Surface Mount
General Purpose
DTL, MOS, Open-Collector, Open-Emitter, RTL, TTL
8-SOIC (0.154', 3.90mm Width)
8-SOIC
RFQ
HMC674LC3CTR
Analog Devices Inc.
IC COMPARATOR 1 GEN PUR 16SMT
Á lager425 pcs
3.3V
5mV
15µA
45mA
9mA
-
0.085ns
1mV
1
HMC674
Tape & Reel (TR)
-
-40°C ~ 85°C
Surface Mount
General Purpose
PECL
16-LFQFN Exposed Pad
16-SMT (3x3)
RFQ
TLV7034QPWRQ1
Texas Instruments
IC COMPARATOR 4 GEN PUR 14TSSOP
Á lager45470 pcs
1.6V ~ 6.5V
8mV
-
-
315nA
73dB CMRR, 77dB PSRR
3µs
17mV
4
-
Tape & Reel (TR)
-
-40°C ~ 125°C
Surface Mount
General Purpose
Rail-to-Rail
14-TSSOP (0.173", 4.40mm Width)
14-TSSOP
RFQ
LM339DRG4
Texas Instruments
IC COMPARATOR 4 DIFF 14SOIC
Á lager16290 pcs
2V ~ 30V, ±1V ~ 15V
5mV @ 30V
0.25µA @ 5V
20mA
2.5mA
-
-
-
4
LM339
Tape & Reel (TR)
-
0°C ~ 70°C
Surface Mount
Differential
CMOS, MOS, Open-Collector, TTL
14-SOIC (0.154', 3.90mm Width)
14-SOIC
RFQ
MCP6541T-I/SN
Microchip Technology
IC COMPARATOR 1 GEN PUR 8SOIC
Á lager81600 pcs
1.6V ~ 5.5V
7mV @ 5.5V
1pA @ 5.5V
30mA
1µA
70dB CMRR, 80dB PSRR
8µs
6.5mV
1
MCP6541
Tape & Reel (TR)
-
-40°C ~ 85°C
Surface Mount
General Purpose
CMOS, Push-Pull, Rail-to-Rail, TTL
8-SOIC (0.154", 3.90mm Width)
8-SOIC
RFQ
LTC1444CDHD#TRPBF
Analog Devices Inc.
IC COMPARATOR 4 W/VOLT REF 16DFN
Á lager7341 pcs
2V ~ 11V, ±1V ~ 5.5V
10mV @ 5V
-
0.015mA @ 5V
8.5µA
80dB CMRR, 80dB PSRR
12µs
50mV
4
LTC1444
Tape & Reel (TR)
-
0°C ~ 70°C
Surface Mount
with Voltage Reference
CMOS, Open-Drain, TTL
16-WFDFN Exposed Pad
16-DFN (5x4)
RFQ
TS861IN
STMicroelectronics
IC COMPARATOR 1 GEN PUR 8DIP
Á lager14620 pcs
2.7V ~ 10V
15mV @ 5V
300pA @ 5V
-
16µA
70dB CMRR
2µs
-
1
TS861
Tube
-
-40°C ~ 85°C
Through Hole
General Purpose
Push-Pull
8-DIP (0.300", 7.62mm)
8-DIP
RFQ
LT6700CS6-3#TRMPBF
Analog Devices Inc.
IC COMPARATR 2 W/VOLT REF TSOT23
Á lager10323 pcs
1.4V ~ 18V
-
0.01µA @ 18V
-
16µA
-
29µs
6.5mV
2
LT6700
Tape & Reel (TR)
Over-The-Top®
0°C ~ 70°C
Surface Mount
with Voltage Reference
Open Collector
SOT-23-6 Thin, TSOT-23-6
TSOT-23-6
RFQ
MAX9647AXK+T
Analog Devices Inc./Maxim Integrated
IC COMPARATOR 1 GEN PUR SC70-5
Á lager63190 pcs
1.8V ~ 5.5V
7mV @ 5V
0.25µA @ 5V
35mA
120µA
90dB PSRR
110ns
2mV
1
MAX964
Tape & Reel (TR)
-
-40°C ~ 125°C
Surface Mount
General Purpose
Open-Drain
5-TSSOP, SC-70-5, SOT-353
SC-70-5
RFQ
TLV3011AIDBVT
Texas Instruments
IC COMPARATOR 1 W/VOLT REF SOT23
Á lager14295 pcs
1.8V ~ 5.5V
12mV @ 5.5V
10pA @ 5.5V
-
5µA
74dB CMRR, 80dB PSRR
13.5µs
-
1
TLV3011
Tape & Reel (TR)
-
-40°C ~ 125°C
Surface Mount
with Voltage Reference
Open Drain
SOT-23-6
SOT-23-6
RFQ
TLV7042QDGKRQ1
Texas Instruments
IC COMPARATOR 2 GEN PUR 8VSSOP
Á lager49970 pcs
1.6V ~ 6.5V
8mV
5pA (Typ)
33mA
750nA
73dB CMRR, 77dB PSRR
3µs
25mV
2
-
Tape & Reel (TR)
Automotive, AEC-Q100
-40°C ~ 125°C
Surface Mount
General Purpose
Open-Drain, Rail-to-Rail
8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
8-VSSOP
RFQ
LMC7215IM
Texas Instruments
IC COMPARATOR 1 GEN PUR 8SOIC
Á lager8900 pcs
2V ~ 8V, ±1V ~ 4V
6mV @ 5V
-
30mA
1µA
80dB CMRR, 90dB PSRR
24µs
-
1
LMC7215
Tube
-
-40°C ~ 85°C
Surface Mount
General Purpose
Push-Pull
8-SOIC (0.154', 3.90mm Width)
8-SOIC
RFQ
TLV3701QDBVRQ1
Texas Instruments
IC COMPARATOR 1 GEN PUR SOT23-5
Á lager53480 pcs
2.7V ~ 16V, ±1.35V ~ 8V
5mV @ 5V
250pA @ 5V
10mA
1.2µA
88dB CMRR, 105dB PSRR
240µs
-
1
TLV3701
Tape & Reel (TR)
Automotive, AEC-Q100
-40°C ~ 125°C
Surface Mount
General Purpose
CMOS, Push-Pull, Rail-to-Rail
SC-74A, SOT-753
SOT-23-5
RFQ
TLV3501AIDR
Texas Instruments
IC COMPARATOR 1 GEN PUR 8SOIC
Á lager28883 pcs
2.7V ~ 5.5V, ±1.35V ~ 2.75V
6.5mV @ 5.5V
10pA @ 5.5V
-
5mA
70dB CMRR, 100dB PSRR
10ns
6mV
1
TLV3501
Tape & Reel (TR)
-
-40°C ~ 125°C
Surface Mount
General Purpose
CMOS, Push-Pull, Rail-to-Rail, TTL
8-SOIC (0.154", 3.90mm Width)
8-SOIC
RFQ
LM393N
onsemi
IC COMPARATOR 2 DIFF 8DIP
Á lager16510 pcs
2V ~ 36V, ±1V ~ 18V
5mV @ 5V
0.25µA @ 5V
18mA @ 5V
2.5mA
-
-
-
2
LM393
Tube
-
0°C ~ 70°C
Through Hole
Differential
-
8-DIP (0.300", 7.62mm)
8-DIP
RFQ
TS862AIDT
STMicroelectronics
IC COMPARATOR 2 GEN PUR 8SOIC
Á lager15770 pcs
2.7V ~ 10V
7mV @ 5V
300pA @ 5V
-
16µA
70dB CMRR
2µs
-
2
TS862
Tape & Reel (TR)
-
-40°C ~ 85°C
Surface Mount
General Purpose
Push-Pull
8-SOIC (0.154', 3.90mm Width)
8-SOIC
RFQ
LTC1540IDD#TRPBF
Analog Devices Inc.
IC COMPARATOR 1 W/VOLT REF 8DFN
Á lager7325 pcs
2V ~ 11V, ±1V ~ 5.5V
12mV @ 5V
-
-
710nA
80dB CMRR, 80dB PSRR
60µs
50mV
1
LTC1540
Tape & Reel (TR)
-
-40°C ~ 85°C
Surface Mount
with Voltage Reference
CMOS, TTL
8-WFDFN Exposed Pad
8-DFN (3x3)
RFQ
TS3011ICT
STMicroelectronics
IC COMPARATOR 1 GEN PUR SC70-5
Á lager19571 pcs
2.2V ~ 5V
-
-
-
1.1mA
-
-
2mV
1
TS3011
Tape & Reel (TR)
-
-
Surface Mount
General Purpose
Push-Pull, Rail-to-Rail
5-TSSOP, SC-70-5, SOT-353
SC-70-5
RFQ
LM393ADRG4
Texas Instruments
IC COMPARATOR 2 DIFF 8SOIC
Á lager186860 pcs
2V ~ 36V, ±1V ~ 18V
2mV @ 30V
0.25µA @ 5V
20mA
2.5mA
-
-
-
2
LM393
Tape & Reel (TR)
-
0°C ~ 70°C
Surface Mount
Differential
CMOS, MOS, Open-Drain, TTL
8-SOIC (0.154", 3.90mm Width)
8-SOIC
RFQ
TLV7081YKAR
Texas Instruments
IC COMPARATOR 1 GEN PUR 4DSBGA
Á lager107790 pcs
1.7V ~ 5.5V
10mV
3pA
45mA
470nA
75dB PSRR
4µs
10mV
1
TLV7081
Tape & Reel (TR)
-
-40°C ~ 125°C
Surface Mount
General Purpose
Open Drain
4-XFBGA, DSBGA
4-DSBGA
RFQ
MAX9698BCPE
Analog Devices Inc./Maxim Integrated
IC COMPARATOR 2 GEN PUR 16DIP
Á lager4360 pcs
±6V
3mV @ ±5V
25µA @ 5V
20mA
40mA, 50mA
96dB CMRR, 85dB PSRR
9ns
-
2
MAX9698
Bulk
-
0°C ~ 70°C
Through Hole
General Purpose
Complementary
16-DIP (0.300", 7.62mm)
16-PDIP
RFQ
LMX393AKA+T
Analog Devices Inc./Maxim Integrated
IC COMPARATOR 2 GEN PUR SOT23-8
Á lager17950 pcs
1.8V ~ 5.5V
7mV @ 5V
0.25µA @ 5V
73mA @ 5V
200µA
70dB PSRR
600ns
2mV
2
LMX393
Tape & Reel (TR)
-
-40°C ~ 125°C
Surface Mount
General Purpose
Open Drain
SOT-23-8
SOT-23-8
RFQ
TSM109AID
STMicroelectronics
IC COMPARATOR 2 W/VOLT REF 8SOIC
Á lager14480 pcs
2V ~ 36V, ±1V ~ 18V
5mV @ 5V
0.25µA @ 5V
20mA @ 5V
2.5mA
-
-
-
2
TSM109
Tube
-
-40°C ~ 105°C
Surface Mount
with Voltage Reference
-
8-SOIC (0.154", 3.90mm Width)
8-SOIC
RFQ
TLV3501AIDBVT
Texas Instruments
IC COMPARATOR 1 GEN PUR SOT23-6
Á lager9775 pcs
2.7V ~ 5.5V, ±1.35V ~ 2.75V
6.5mV @ 5.5V
10pA @ 5.5V
-
5mA
70dB CMRR, 100dB PSRR
10ns
6mV
1
TLV3501
Tape & Reel (TR)
-
-40°C ~ 125°C
Surface Mount
General Purpose
CMOS, Push-Pull, Rail-to-Rail, TTL
SOT-23-6
SOT-23-6
RFQ
LMV331IDBVRG4
Texas Instruments
IC COMPARATOR 1 GEN PUR SOT23-5
Á lager13760 pcs
2.7V ~ 5.5V
7mV @ 5V
0.25µA @ 5V
84mA @ 5V
150µA
-
600ns
-
1
LMV331
Tape & Reel (TR)
-
-40°C ~ 85°C
Surface Mount
General Purpose
Open Collector
SC-74A, SOT-753
SOT-23-5
RFQ
TLV3701ID
Texas Instruments
IC COMPARATOR 1 GEN PUR 8SOIC
Á lager44590 pcs
2.7V ~ 16V, ±1.35V ~ 8V
5mV @ 15V
250pA @ 15V
10mA
1µA
88dB CMRR, 105dB PSRR
-
-
1
TLV3701
Tube
-
-40°C ~ 125°C
Surface Mount
General Purpose
CMOS, Push-Pull, Rail-to-Rail
8-SOIC (0.154", 3.90mm Width)
8-SOIC
RFQ
TS393DR2G
onsemi
IC COMPARATOR 2 GEN PUR 8SOIC
Á lager155970 pcs
2.7V ~ 16V
1.4mV (Typ)
1pA
2nA
15µA
71dB CMRR, 80dB PSRR
2.1µs
-
2
TS393
Tape & Reel (TR)
-
-40°C ~ 125°C
Surface Mount
General Purpose
-
8-SOIC (0.154', 3.90mm Width)
8-SOIC
RFQ
KA393D
Fairchild Semiconductor
IC COMPARATOR 2 GEN PUR 8SOIC
Á lager589950 pcs
2V ~ 36V, ±1V ~ 18V
5mV @ 5V
0.25µA @ 5V
18mA @ 5V
2.5mA
-
-
-
2
-
Tube
-
0°C ~ 70°C
Surface Mount
General Purpose
-
8-SOIC (0.154", 3.90mm Width)
8-SOIC
RFQ
MAX989ESA
Analog Devices Inc./Maxim Integrated
IC COMPARATOR 2 GEN PUR 8SOIC
Á lager8010 pcs
2.5V ~ 5.5V, ±1.25V ~ 2.75V
5mV @ 5.5V
1pA @ 5.5V
-
24µA
80dB CMRR, 80dB PSRR
450ns
±3mV
2
MAX989
Tube
-
-40°C ~ 85°C
Surface Mount
General Purpose
CMOS, Push-Pull, Rail-to-Rail, TTL
8-SOIC (0.154', 3.90mm Width)
8-SOIC
RFQ
LM339N
Texas Instruments
IC COMPARATOR 4 DIFF 14DIP
Á lager291780 pcs
2V ~ 30V, ±1V ~ 15V
5mV @ 30V
0.25µA @ 5V
20mA
2.5mA
-
-
-
4
LM339
Tube
-
0°C ~ 70°C
Through Hole
Differential
CMOS, MOS, Open-Collector, TTL
14-DIP (0.300', 7.62mm)
14-PDIP
RFQ
MAX976ESA+T
Analog Devices Inc./Maxim Integrated
IC COMPARATOR 2 GEN PUR 8SOIC
Á lager9753 pcs
2.7V ~ 5.5V
2mV @ 5V
0.075µA @ 5.5V
-
650µA
95dB CMRR, 100dB PSRR
28ns
4mV
2
MAX976
Tape & Reel (TR)
-
-40°C ~ 85°C
Surface Mount
General Purpose
CMOS, Rail-to-Rail, TTL
8-SOIC (0.154', 3.90mm Width)
8-SOIC
RFQ
TLV2352IP
Texas Instruments
IC COMPARATOR 2 DIFF 8DIP
Á lager44614 pcs
2V ~ 8V
5mV @ 5V
5pA @ 5V
20mA
400µA
-
-
-
2
TLV2352
Tube
LinCMOS™
-40°C ~ 85°C
Through Hole
Differential
CMOS, MOS, Open-Drain, TTL
8-DIP (0.300', 7.62mm)
8-PDIP
RFQ
MAX923ESA
Analog Devices Inc./Maxim Integrated
IC COMPARATOR 2 W/VOLT REF 8SOIC
Á lager7390 pcs
2.5V ~ 11V, ±1.25V ~ 5.5V
10mV @ 5V
-
50mA
7.5µA
80dB CMRR, 80dB PSRR
12µs
50mV
2
MAX923
Tube
-
-40°C ~ 85°C
Surface Mount
with Voltage Reference
CMOS, TTL
8-SOIC (0.154", 3.90mm Width)
8-SOIC
RFQ
MAX933ESA+
Analog Devices Inc./Maxim Integrated
IC COMPARATOR 2 W/VOLT REF 8SOIC
Á lager8012 pcs
2.5V ~ 11V, ±1.25V ~ 5.5V
10mV @ 5V
-
0.015mA @ 5V
6µA
80dB CMRR, 80dB PSRR
12µs
50mV
2
MAX933
Tube
-
-40°C ~ 85°C
Surface Mount
with Voltage Reference
CMOS, TTL
8-SOIC (0.154', 3.90mm Width)
8-SOIC
RFQ
TL331BIDBVR
Texas Instruments
IC COMPARATOR 1 GEN PUR SOT23-5
Á lager148840 pcs
3V ~ 36V
2.5mV @ 36V
0.025µA @ 5V
18mA @ 5V
430µA
-
1µs (Typ)
-
1
TL331
Tape & Reel (TR)
-
-40°C ~ 125°C
Surface Mount
General Purpose
Open-Collector, CMOS, MOS, TTL
SC-74A, SOT-753
SOT-23-5
RFQ
MCP6566T-E/LT
Microchip Technology
IC COMPARATOR 1 GEN PUR SC70-5
Á lager86310 pcs
1.8V ~ 5.5V
10mV @ 5.5V
1pA @ 5.5V
50mA
130µA
66dB CMRR, 70dB PSRR
80ns
5mV
1
MCP6566
Tape & Reel (TR)
-
-40°C ~ 125°C
Surface Mount
General Purpose
CMOS, Open-Drain
5-TSSOP, SC-70-5, SOT-353
SC-70-5
RFQ
TPS3701DDCT
Texas Instruments
IC COMPARATOR 1 WINDW SOT23-THIN
Á lager17149 pcs
1.8V ~ 36V
-
-
-
11µA
-
28.1µs
5.5mV
1
TPS3701
Tape & Reel (TR)
-
-40°C ~ 125°C
Surface Mount
Window
Open Drain
SOT-23-6 Thin, TSOT-23-6
SOT-23-THIN
RFQ
ADCMP394ARZ
Analog Devices Inc.
IC COMPARATOR 1 GEN PUR 8SOIC
Á lager55230 pcs
2.3V ~ 5.5V
5mV
0.03µA
-
47.9µA
74dB CMRR, 80dB PSRR
4.2µs
4mV
1
ADCMP394
Tube
-
-40°C ~ 125°C
Surface Mount
General Purpose
Open Drain
8-SOIC (0.154', 3.90mm Width)
8-SOIC
RFQ
MAX942ESA
Analog Devices Inc./Maxim Integrated
IC COMPARATOR 2 GEN PUR 8SOIC
Á lager14550 pcs
2.7V ~ 5.5V
2mV @ 5.5V
0.15µA @ 5.5V
-
600µA
81.94dB CMRR, 81.94dB PSRR
80ns
-
2
MAX942
Tube
-
-40°C ~ 85°C
Surface Mount
General Purpose
CMOS, Push-Pull, TTL
8-SOIC (0.154', 3.90mm Width)
8-SOIC
RFQ
MAX9144ESD
Analog Devices Inc./Maxim Integrated
IC COMPARATOR 4 GEN PUR 14SOIC
Á lager12490 pcs
2.7V ~ 5.5V
2mV @ 5V
0.32µA @ 5V
-
300µA
81.94dB CMRR, 81.94dB PSRR
40ns
1.5mV
4
MAX9144
Tube
-
-40°C ~ 85°C
Surface Mount
General Purpose
CMOS, Push-Pull, TTL
14-SOIC (0.154', 3.90mm Width)
14-SOIC
RFQ
ADCMP354YKSZ-REEL7
Analog Devices Inc.
IC COMPARATOR 1 W/VOLT REF SC70
Á lager54080 pcs
2.25V ~ 5.5V
-
170µA @ 5.5V
-
15µA
-
-
15mV
1
ADCMP354
Tape & Reel (TR)
-
-40°C ~ 125°C
Surface Mount
with Voltage Reference
Open Drain
SC-82A, SOT-343
SC-70-4
RFQ
ISL28196FRUZ-T7
Renesas Electronics America Inc
IC COMPARATOR 1 GEN PUR 6UTDFN
Á lager9850 pcs
1.8V ~ 5.5V
2mV @ 5V
80pA @ 5V
-
4µA
100dB CMRR, 100dB PSRR
300µs
-
1
ISL28196
Tape & Reel (TR)
-
-40°C ~ 125°C
Surface Mount
General Purpose
Push-Pull, Rail-to-Rail
6-UFDFN Exposed Pad
6-UTDFN (1.6x1.6)
RFQ
LM311N
STMicroelectronics
IC COMPARATOR 1 GEN PUR 8DIP
Á lager7430 pcs
5V ~ 30V, ±2.5V ~ 15V
7.5mV @ ±15V
0.25µA @ ±15V
50mA
7.5mA
-
-
-
1
LM311
Tube
-
0°C ~ 70°C
Through Hole
General Purpose
DTL, MOS, Open-Collector, Open-Emitter, RTL, TTL
8-DIP (0.300', 7.62mm)
8-DIP
RFQ
TLV7032QDGKRQ1
Texas Instruments
IC COMPARATOR 2 GEN PUR 8VSSOP
Á lager79940 pcs
1.6V ~ 6.5V
8mV
5pA (Typ)
29mA
750nA
73dB CMRR, 77dB PSRR
3µs
25mV
2
-
Tape & Reel (TR)
Automotive, AEC-Q100
-40°C ~ 125°C
Surface Mount
General Purpose
Push-Pull, Rail-to-Rail
8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
8-VSSOP
RFQ