74VHC112M
Fairchild Semiconductor
IC FF JK TYPE DUAL 1BIT 16SOIC
В наличност46980 pcs
1
Bulk
74VHC112
2 µA
4 pF
10.5ns @ 5V, 50pF
Negative Edge
8mA, 8mA
185 MHz
Set(Preset) and Reset
2V ~ 5.5V
2
16-SOIC
16-SOIC (0.154", 3.90mm Width)
Complementary
JK Type
Surface Mount
-40°C ~ 85°C (TA)
74VHC
RFQ
74ACT175MTC
Fairchild Semiconductor
IC FF D-TYPE SNGL 4BIT 16TSSOP
В наличност192570 pcs
4
Tube
74ACT175
40 µA
4.5 pF
11ns @ 5V, 50pF
Positive Edge
24mA, 24mA
236 MHz
Master Reset
4.5V ~ 5.5V
1
16-TSSOP
16-TSSOP (0.173", 4.40mm Width)
Complementary
D-Type
Surface Mount
-40°C ~ 85°C (TA)
74ACT
RFQ
CD74ACT374E
Texas Instruments
IC FF D-TYPE SNGL 8BIT 20DIP
В наличност54030 pcs
8
Tube
74ACT374
8 µA
10 pF
11.2ns @ 5V, 50pF
Positive Edge
24mA, 24mA
110 MHz
Standard
4.5V ~ 5.5V
1
20-PDIP
20-DIP (0.300', 7.62mm)
Tri-State, Non-Inverted
D-Type
Through Hole
-55°C ~ 125°C (TA)
74ACT
RFQ
74LCX374MTC
onsemi
IC FF D-TYPE SNGL 8BIT 20TSSOP
В наличност9950 pcs
8
Tube
74LCX374
10 µA
7 pF
8.5ns @ 3.3V, 50pF
Positive Edge
24mA, 24mA
150 MHz
Standard
2V ~ 3.6V
1
20-TSSOP
20-TSSOP (0.173', 4.40mm Width)
Tri-State, Non-Inverted
D-Type
Surface Mount
-40°C ~ 85°C (TA)
74LCX
RFQ
SN74LVC374ADGVR
Texas Instruments
IC FF D-TYPE SNGL 8BIT 20TVSOP
В наличност115240 pcs
8
Tape & Reel (TR)
74LVC374
10 µA
4 pF
7ns @ 3.3V, 50pF
Positive Edge
24mA, 24mA
100 MHz
Standard
1.65V ~ 3.6V
1
20-TVSOP
20-TFSOP (0.173', 4.40mm Width)
Tri-State, Non-Inverted
D-Type
Surface Mount
-40°C ~ 85°C (TA)
74LVC
RFQ
74F378SC
Fairchild Semiconductor
D FLIP-FLOP, F/FAST SERIES TTL
В наличност193220 pcs
6
Bulk
74F378
45 mA
-
8.5ns @ 5V, 50pF
Positive Edge
1mA, 20mA
100 MHz
Standard
4.5V ~ 5.5V
1
16-SOIC
16-SOIC (0.154", 3.90mm Width)
Non-Inverted
D-Type
Surface Mount
0°C ~ 70°C (TA)
74F
RFQ
MC100LVEL31DG
onsemi
IC FF D-TYPE SNGL 1BIT 8SOIC
В наличност8324 pcs
1
Tube
MC100LVEL31
35 mA
-
-
Positive Edge
-
2.9 GHz
Set(Preset) and Reset
-3V ~ -3.8V
1
8-SOIC
8-SOIC (0.154", 3.90mm Width)
Complementary
D-Type
Surface Mount
-40°C ~ 85°C (TA)
100LVEL
RFQ
SN74LVC16374ADGGR
Texas Instruments
IC FF D-TYPE DUAL 8BIT 48TSSOP
В наличност47280 pcs
8
Tape & Reel (TR)
74LVC16374
20 µA
5 pF
4.5ns @ 3.3V, 50pF
Positive Edge
24mA, 24mA
150 MHz
Standard
1.65V ~ 3.6V
2
48-TSSOP
48-TFSOP (0.240', 6.10mm Width)
Tri-State, Non-Inverted
D-Type
Surface Mount
-40°C ~ 85°C (TA)
74LVC
RFQ
CD4013BM
Texas Instruments
IC FF D-TYPE DUAL 1BIT 14SOIC
В наличност80210 pcs
1
Tube
CD4013
4 µA
5 pF
90ns @ 15V, 50pF
Positive Edge
6.8mA, 6.8mA
24 MHz
Set(Preset) and Reset
3V ~ 18V
2
14-SOIC
14-SOIC (0.154', 3.90mm Width)
Complementary
D-Type
Surface Mount
-55°C ~ 125°C (TA)
4000B
RFQ
SY100E131JC
Microchip Technology
IC FF D-TYPE SNGL 4BIT 28PLCC
В наличност4740 pcs
4
Bulk
100E131
70 mA
-
-
Positive Edge
-
1.4 GHz
Set(Preset) and Reset
-4.2V ~ -5.5V
1
28-PLCC (11.48x11.48)
28-LCC (J-Lead)
Complementary
D-Type
Surface Mount
0°C ~ 70°C (TA)
100E
RFQ
74F374SJX
onsemi
IC FF D-TYPE SNGL 8BIT 20SOP
В наличност16880 pcs
8
Tape & Reel (TR)
74F374
86 mA
-
8.5ns @ 5V, 50pF
Positive Edge
3mA, 24mA
140 MHz
Standard
4.5V ~ 5.5V
1
20-SOP
20-SOIC (0.209', 5.30mm Width)
Tri-State, Non-Inverted
D-Type
Surface Mount
0°C ~ 70°C (TA)
74F
RFQ
SN74LS374N
onsemi
IC FF D-TYPE SNGL 8BIT 20DIP
В наличност80030 pcs
8
Tube
74LS374
40 mA
-
28ns @ 5V, 45pF
Positive Edge
2.6mA, 24mA
50 MHz
Standard
4.75V ~ 5.25V
1
20-PDIP
20-DIP (0.300", 7.62mm)
Tri-State, Non-Inverted
D-Type
Through Hole
0°C ~ 70°C (TA)
74LS
RFQ
SN74HC574ANSR
Texas Instruments
IC FF D-TYPE SNGL 8BIT 16SO
В наличност48410 pcs
8
Tape & Reel (TR)
74HC574
8 µA
3 pF
33ns @ 6V, 150pF
Positive Edge
7.8mA, 7.8mA
84 MHz
Standard
2V ~ 6V
1
16-SO
16-SOIC (0.209", 5.30mm Width)
Tri-State, Non-Inverted
D-Type
Surface Mount
-40°C ~ 85°C (TA)
74HC
RFQ
SN74AUC1G80YZPR
Texas Instruments
IC FF D-TYPE SNGL 1BIT 5DSBGA
В наличност181460 pcs
1
Tape & Reel (TR)
74AUC1G80
10 µA
2.5 pF
1.8ns @ 2.5V, 30pF
Positive Edge
9mA, 9mA
275 MHz
Standard
0.8V ~ 2.7V
1
5-DSBGA (1.4x0.9)
5-XFBGA, DSBGA
Inverted
D-Type
Surface Mount
-40°C ~ 85°C (TA)
74AUC
RFQ
SN74HC374NSR
Texas Instruments
IC FF D-TYPE SNGL 8BIT 20SO
В наличност117150 pcs
8
Tape & Reel (TR)
74HC374
8 µA
3 pF
31ns @ 6V, 50pF
Positive Edge
7.8mA, 7.8mA
70 MHz
Standard
2V ~ 6V
1
20-SO
20-SOIC (0.209', 5.30mm Width)
Tri-State, Non-Inverted
D-Type
Surface Mount
-40°C ~ 85°C (TA)
74HC
RFQ
SN74LVTH162374DGGR
Texas Instruments
IC FF D-TYPE DUAL 8BIT 48TSSOP
В наличност61140 pcs
8
Tape & Reel (TR)
74LVTH162374
190 µA
3 pF
5.3ns @ 3.3V, 50pF
Positive Edge
12mA, 12mA
160 MHz
Standard
2.7V ~ 3.6V
2
48-TSSOP
48-TFSOP (0.240", 6.10mm Width)
Tri-State, Non-Inverted
D-Type
Surface Mount
-40°C ~ 85°C (TA)
74LVTH
RFQ
CY74FCT273CTSOC
Texas Instruments
IC FF D-TYPE SNGL 8BIT 20SOIC
В наличност99170 pcs
8
Tube
74FCT273
200 µA
5 pF
5.8ns @ 50pF
Positive Edge
32mA, 64mA
-
Master Reset
4.75V ~ 5.25V
1
20-SOIC
20-SOIC (0.295", 7.50mm Width)
Non-Inverted
D-Type
Surface Mount
-40°C ~ 85°C (TA)
74FCT
RFQ
SN74ACT574DWR
Texas Instruments
IC FF D-TYPE SNGL 8BIT 20SOIC
В наличност97680 pcs
8
Tape & Reel (TR)
74ACT574
4 µA
4.5 pF
11ns @ 5V, 50pF
Positive Edge
24mA, 24mA
110 MHz
Standard
4.5V ~ 5.5V
1
20-SOIC
20-SOIC (0.295", 7.50mm Width)
Tri-State, Non-Inverted
D-Type
Surface Mount
-40°C ~ 85°C (TA)
74ACT
RFQ
SN74AC564N
Texas Instruments
IC FF D-TYPE SNGL 8BIT 20DIP
В наличност41923 pcs
8
Tube
74AC564
4 µA
4.5 pF
10.5ns @ 5V, 50pF
Positive Edge
24mA, 24mA
95 MHz
Standard
2V ~ 6V
1
20-PDIP
20-DIP (0.300", 7.62mm)
Tri-State, Inverted
D-Type
Through Hole
-40°C ~ 85°C (TA)
74AC
RFQ
SN74AHC273DWR
Texas Instruments
IC FF D-TYPE SNGL 8BIT 20SOIC
В наличност162100 pcs
8
Tape & Reel (TR)
74AHC273
4 µA
2.5 pF
11ns @ 5V, 50pF
Positive Edge
8mA, 8mA
110 MHz
Master Reset
2V ~ 5.5V
1
20-SOIC
20-SOIC (0.295', 7.50mm Width)
Non-Inverted
D-Type
Surface Mount
-40°C ~ 125°C (TA)
74AHC
RFQ
9024DC
Texas Instruments
J-K FLIP-FLOP
В наличност8505 pcs
1
Bulk
9024
14 mA
-
33ns @ 5V, 15pF
Positive Edge
-, 16mA
25 MHz
Master Reset
4.75V ~ 5.25V
2
16-CDIP
16-CDIP (0.300", 7.62mm)
Complementary
JK Type
Through Hole
0°C ~ 75°C
-
RFQ
74AC374MTR
STMicroelectronics
IC FF D-TYPE SNGL 8BIT 20SOP
В наличност3830 pcs
8
Tape & Reel (TR)
74AC374
4 µA
4 pF
9.5ns @ 5V, 50pF
Positive Edge
24mA, 24mA
270 MHz
Standard
2V ~ 6V
1
20-SO
20-SOIC (0.295', 7.50mm Width)
Tri-State, Non-Inverted
D-Type
Surface Mount
-55°C ~ 125°C (TA)
74AC
RFQ
74LVTH162374MTX
Fairchild Semiconductor
IC FF D-TYPE DUAL 8BIT 48TSSOP
В наличност25591 pcs
8
Bulk
74LVTH162374
190 µA
4 pF
5.3ns @ 3.3V, 50pF
Positive Edge
12mA, 12mA
160 MHz
Standard
2.7V ~ 3.6V
2
48-TSSOP
48-TFSOP (0.240", 6.10mm Width)
Tri-State, Non-Inverted
D-Type
Surface Mount
-40°C ~ 85°C (TA)
74LVTH
RFQ
SNJ54107J
Texas Instruments
54107 DUAL J-K FLIP-FLOPS WITH C
В наличност3836 pcs
-
Bulk
SNJ54107
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
*
RFQ
SN74HC112D
Texas Instruments
IC FF JK TYPE DUAL 1BIT 16SOIC
В наличност81810 pcs
1
Tube
74HC112
4 µA
3 pF
21ns @ 6V, 50pF
Negative Edge
5.2mA, 5.2mA
60 MHz
Set(Preset) and Reset
2V ~ 6V
2
16-SOIC
16-SOIC (0.154', 3.90mm Width)
Complementary
JK Type
Surface Mount
-40°C ~ 85°C (TA)
74HC
RFQ
MC10H186P
onsemi
IC FF D-TYPE SNGL 6BIT 16DIP
В наличност13960 pcs
6
Tube
MC10H186
110 mA
-
-
Positive Edge
-
250 MHz
Reset
-4.9V ~ -5.46V
1
16-PDIP
16-DIP (0.300', 7.62mm)
Non-Inverted
D-Type
Through Hole
0°C ~ 75°C (TA)
10H
RFQ
SN74ALS576BNS
Texas Instruments
IC D-TYPE POS TRG SNGL 20SO
В наличност40400 pcs
-
Bulk
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
*
RFQ
74LVTH374MTCX
onsemi
IC FF D-TYPE SNGL 8BIT 20TSSOP
В наличност17780 pcs
8
Tape & Reel (TR)
74LVTH374
190 µA
3 pF
4.9ns @ 3.3V, 50pF
Positive Edge
32mA, 64mA
160 MHz
Standard
2.7V ~ 3.6V
1
20-TSSOP
20-TSSOP (0.173', 4.40mm Width)
Tri-State, Non-Inverted
D-Type
Surface Mount
-40°C ~ 85°C (TA)
74LVTH
RFQ
SN74LS174N
Texas Instruments
IC FF D-TYPE SNGL 6BIT 16DIP
В наличност71890 pcs
6
Tube
74LS174
26 mA
-
30ns @ 5V, 15pF
Positive Edge
400µA, 8mA
40 MHz
Master Reset
4.75V ~ 5.25V
1
16-PDIP
16-DIP (0.300", 7.62mm)
Non-Inverted
D-Type
Through Hole
0°C ~ 70°C (TA)
74LS
RFQ
74LCX821MTCX
Fairchild Semiconductor
IC FF D-TYPE SNGL 10BIT 24TSSOP
В наличност113010 pcs
10
Bulk
74LCX821
10 µA
7 pF
7ns @ 3.3V, 50pF
Positive Edge
24mA, 24mA
150 MHz
Standard
2V ~ 3.6V
1
24-TSSOP
24-TSSOP (0.173", 4.40mm Width)
Tri-State, Non-Inverted
D-Type
Surface Mount
-40°C ~ 85°C (TA)
74LCX
RFQ
MC74ACT374DTR2G
onsemi
IC FF D-TYPE SNGL 8BIT 20TSSOP
В наличност83110 pcs
8
Tape & Reel (TR)
74ACT374
8 µA
4.5 pF
10ns @ 5V, 50pF
Positive Edge
24mA, 24mA
160 MHz
Standard
4.5V ~ 5.5V
1
20-TSSOP
20-TSSOP (0.173", 4.40mm Width)
Tri-State, Non-Inverted
D-Type
Surface Mount
-40°C ~ 85°C (TA)
74ACT
RFQ
MM74HC74AM
Fairchild Semiconductor
D FLIP-FLOP, HC/UH SERIES, 2-FUN
В наличност166610 pcs
1
Bulk
74HC74
4 µA
5 pF
19ns @ 6V, 50pF
Positive Edge
5.2mA, 5.2mA
94 MHz
Set(Preset) and Reset
2V ~ 6V
2
14-SOIC
14-SOIC (0.154", 3.90mm Width)
Complementary
D-Type
Surface Mount
-40°C ~ 85°C (TA)
74HC
RFQ
SN74HC74D
Texas Instruments
IC FF D-TYPE DUAL 1BIT 14SOIC
В наличност97880 pcs
1
Tube
74HC74
4 µA
3 pF
15ns @ 6V, 50pF
Positive Edge
5.2mA, 5.2mA
60 MHz
Set(Preset) and Reset
2V ~ 6V
2
14-SOIC
14-SOIC (0.154", 3.90mm Width)
Complementary
D-Type
Surface Mount
-40°C ~ 85°C (TA)
74HC
RFQ
M74HC574RM13TR
STMicroelectronics
IC FF D-TYPE SNGL 8BIT 20SOP
В наличност6410 pcs
8
Tape & Reel (TR)
74HC574
4 µA
5 pF
32ns @ 6V, 150pF
Positive Edge
7.8mA, 7.8mA
90 MHz
Standard
2V ~ 6V
1
20-SO
20-SOIC (0.295', 7.50mm Width)
Tri-State, Non-Inverted
D-Type
Surface Mount
-55°C ~ 125°C (TA)
74HC
RFQ
74LVX574MTC
Fairchild Semiconductor
IC FF D-TYPE SNGL 8BIT 20TSSOP
В наличност259770 pcs
8
Tube
74LVX574
4 µA
4 pF
16.7ns @ 3.3V, 50pF
Positive Edge
4mA, 4mA
75 MHz
Standard
2V ~ 3.6V
1
20-TSSOP
20-TSSOP (0.173", 4.40mm Width)
Tri-State, Non-Inverted
D-Type
Surface Mount
-40°C ~ 85°C (TA)
74LVX
RFQ
SN74AS109ADR
Texas Instruments
IC FF JK TYPE DUAL 1BIT 16SOIC
В наличност10070 pcs
1
Tape & Reel (TR)
74AS109
17 mA
-
9ns @ 5V, 50pF
Positive Edge
2mA, 20mA
105 MHz
Set(Preset) and Reset
4.5V ~ 5.5V
2
16-SOIC
16-SOIC (0.154", 3.90mm Width)
Complementary
JK Type
Surface Mount
0°C ~ 70°C (TA)
74AS
RFQ
MC74ACT273DTR2G
onsemi
IC FF D-TYPE SNGL 8BIT 20TSSOP
В наличност111700 pcs
8
Tape & Reel (TR)
74ACT273
8 µA
4.5 pF
11ns @ 5V, 50pF
Positive Edge
24mA, 24mA
200 MHz
Master Reset
4.5V ~ 5.5V
1
20-TSSOP
20-TSSOP (0.173', 4.40mm Width)
Non-Inverted
D-Type
Surface Mount
-40°C ~ 85°C (TA)
74ACT
RFQ
74ALVCH32374BFG8
IDT, Integrated Device Technology Inc
IC FF D-TYPE QUAD 8BIT 96CABGA
В наличност48600 pcs
8
Bulk
74ALVCH32374
40 µA
5 pF
4.2ns @ 3.3V, 50pF
Positive Edge
24mA, 24mA
150 MHz
Standard
2.7V ~ 3.6V
4
96-CABGA (13.5x5.5)
96-LFBGA
Tri-State, Non-Inverted
D-Type
Surface Mount
-40°C ~ 85°C (TA)
74ALVCH
RFQ
74LS174PC
Texas Instruments
D FLIP-FLOP, LS SERIES TTL
В наличност157470 pcs
6
Bulk
74LS174
26 mA
-
25ns @ 5V, 15pF
Positive Edge
-
30 MHz
Master Reset
4.75V ~ 5.25V
1
16-PDIP
16-DIP (0.300", 7.62mm)
Non-Inverted
D-Type
Through Hole
0°C ~ 70°C (TA)
74LS
RFQ
PI74STX1G79CX
Diodes Incorporated
IC SINGLE D-TYPE FLIPFLOP SC70-5
В наличност8510 pcs
1
Cut Tape (CT)
74STX1G79
2 µA
3 pF
-
Positive Edge
32mA, 32mA
150 MHz
Standard
1.65V ~ 5.5V
1
SC-70-5
5-TSSOP, SC-70-5, SOT-353
Non-Inverted
D-Type
Surface Mount
-40°C ~ 85°C (TA)
74STX
RFQ
74ACT273TTR
STMicroelectronics
IC FF D-TYPE SNGL 8BIT 20TSSOP
В наличност9370 pcs
8
Tape & Reel (TR)
74ACT273
4 µA
4 pF
8.5ns @ 5V, 50pF
Positive Edge
24mA, 24mA
190 MHz
Master Reset
4.5V ~ 5.5V
1
20-TSSOP
20-TSSOP (0.173", 4.40mm Width)
Non-Inverted
D-Type
Surface Mount
-55°C ~ 125°C (TA)
74ACT
RFQ
MM74HCT574MTCX
onsemi
IC FF D-TYPE SNGL 8BIT 20TSSOP
В наличност98870 pcs
8
Tape & Reel (TR)
74HCT574
8 µA
10 pF
30ns @ 5V, 50pF
Positive Edge
7.2mA, 7.2mA
33 MHz
Standard
4.5V ~ 5.5V
1
20-TSSOP
20-TSSOP (0.173", 4.40mm Width)
Tri-State, Non-Inverted
D-Type
Surface Mount
-40°C ~ 85°C (TA)
74HCT
RFQ
SN74AHC273PWR
Texas Instruments
IC FF D-TYPE SNGL 8BIT 20TSSOP
В наличност60360 pcs
8
Tape & Reel (TR)
74AHC273
4 µA
2.5 pF
11ns @ 5V, 50pF
Positive Edge
8mA, 8mA
110 MHz
Master Reset
2V ~ 5.5V
1
20-TSSOP
20-TSSOP (0.173", 4.40mm Width)
Non-Inverted
D-Type
Surface Mount
-40°C ~ 125°C (TA)
74AHC
RFQ
SN74AS374NSR
Texas Instruments
IC FF D-TYPE SNGL 8BIT 20SO
В наличност16120 pcs
8
Tape & Reel (TR)
74AS374
120 mA
-
11.5ns @ 50pF
Positive Edge
15mA, 48mA
125 MHz
Standard
4.5V ~ 5.5V
1
20-SO
20-SOIC (0.209", 5.30mm Width)
Tri-State, Non-Inverted
D-Type
Surface Mount
0°C ~ 70°C (TA)
74AS
RFQ
SN74HC74APWR
Texas Instruments
IC FF D-TYPE DUAL 1BIT 14TSSOP
В наличност53560 pcs
1
Tape & Reel (TR)
74HC74
4 µA
3 pF
26ns @ 6V, 50pF
Positive Edge
5.2mA, 5.2mA
85 MHz
Set(Preset) and Reset
2V ~ 6V
2
14-TSSOP
14-TSSOP (0.173", 4.40mm Width)
Complementary
D-Type
Surface Mount
-40°C ~ 85°C (TA)
74HC
RFQ
74VHC574FT
Toshiba Semiconductor and Storage
IC FF D-TYPE SNGL 8BIT 20TSSOP
В наличност170630 pcs
8
Tape & Reel (TR)
74VHC574
4 µA
4 pF
10.6ns @ 5V, 50pF
Positive Edge
8mA, 8mA
115 MHz
Standard
2V ~ 5.5V
1
20-TSSOP
20-TSSOP (0.173', 4.40mm Width)
Tri-State, Non-Inverted
D-Type
Surface Mount
-40°C ~ 85°C (TA)
74VHC
RFQ
MC10E452FNR2
onsemi
IC FF SNGL 5BIT 28PLCC
В наличност17490 pcs
5
Tape & Reel (TR)
MC10E452
-
-
-
Positive Edge
-
1.1 GHz
Master Reset
-4.2V ~ -5.7V
1
28-PLCC (11.51x11.51)
28-LCC (J-Lead)
Complementary
-
Surface Mount
0°C ~ 85°C (TA)
10E
RFQ
MC10EP35D
onsemi
IC FF JK TYPE SNGL 1BIT 8SOIC
В наличност4990 pcs
1
Tube
10EP35
50 mA
-
-
Positive Edge
-
3 GHz
Reset
-3V ~ -5.5V
1
8-SOIC
8-SOIC (0.154', 3.90mm Width)
Differential
JK Type
Surface Mount
-40°C ~ 85°C (TA)
10EP
RFQ
SN74LVC1G175DBVT
Texas Instruments
IC FF D-TYPE SNGL 1BIT SOT23-6
В наличност61510 pcs
1
Tape & Reel (TR)
74LVC1G175
10 µA
3 pF
5ns @ 5V, 50pF
Positive Edge
32mA, 32mA
175 MHz
Reset
1.65V ~ 5.5V
1
SOT-23-6
SOT-23-6
Non-Inverted
D-Type
Surface Mount
-40°C ~ 125°C (TA)
74LVC
RFQ
MC10E452FN
onsemi
IC FF SNGL 5BIT 28PLCC
В наличност13860 pcs
5
Tube
MC10E452
-
-
-
Positive Edge
-
1.1 GHz
Master Reset
-4.2V ~ -5.7V
1
28-PLCC (11.51x11.51)
28-LCC (J-Lead)
Complementary
-
Surface Mount
0°C ~ 85°C (TA)
10E
RFQ