AT45DB161E-MHF-Y
Adesto Technologies
IC FLASH 16MBIT SPI 85MHZ 8UDFN
В наявності21140 pcs
16Mbit
85 MHz
-
FLASH
8µs, 4ms
SPI
-
-
-
AT45DB161
528 Bytes x 4096 pages
Tray
FLASH
-
-
-40°C ~ 85°C (TC)
Surface Mount
8-UDFN Exposed Pad
8-UDFN (5x6)
2.3V ~ 3.6V
Non-Volatile
RFQ
AT27C512R-45PU
Microchip Technology
IC EPROM 512KBIT PARALLEL 28DIP
В наявності14972 pcs
512Kbit
-
45 ns
EPROM
-
Parallel
-
-
-
AT27C512
64K x 8
Tube
EPROM - OTP
-
-
-40°C ~ 85°C (TC)
Through Hole
28-DIP (0.600', 15.24mm)
28-PDIP
4.5V ~ 5.5V
Non-Volatile
RFQ
STK14C88-5C35M
Infineon Technologies
IC NVSRAM 256KBIT PAR 32CDIP
В наявності12140 pcs
256Kbit
-
35 ns
NVSRAM
35ns
Parallel
-
-
-
STK14C88
32K x 8
Tube
NVSRAM (Non-Volatile SRAM)
-
-
-55°C ~ 125°C (TA)
Through Hole
32-CDIP (0.300', 7.62mm)
32-CDIP
4.5V ~ 5.5V
Non-Volatile
RFQ
IS43TR81280BL-107MBL
ISSI, Integrated Silicon Solution Inc
IC DRAM 1GBIT PAR 78TWBGA
В наявності10100 pcs
1Gbit
933 MHz
20 ns
DRAM
15ns
Parallel
-
-
-
IS43TR81280
128M x 8
Tray
SDRAM - DDR3L
-
-
0°C ~ 95°C (TC)
Surface Mount
78-TFBGA
78-TWBGA (8x10.5)
1.283V ~ 1.45V
Volatile
RFQ
IS42S16100E-6TLI
ISSI, Integrated Silicon Solution Inc
IC DRAM 16MBIT PAR 50TSOP II
В наявності8080 pcs
16Mbit
166 MHz
5.5 ns
DRAM
-
Parallel
-
-
-
IS42S16100
1M x 16
Tray
SDRAM
-
-
-40°C ~ 85°C (TA)
Surface Mount
50-TSOP (0.400", 10.16mm Width)
50-TSOP II
3V ~ 3.6V
Volatile
RFQ
CY7C168A-25PC
Cypress Semiconductor Corp
IC SRAM 16KBIT PARALLEL 20DIP
В наявності19525 pcs
16Kbit
-
25 ns
SRAM
25ns
Parallel
-
-
-
CY7C168
4K x 4
Bulk
SRAM - Asynchronous
-
-
0°C ~ 70°C (TA)
Through Hole
20-DIP (0.300", 7.62mm)
20-DIP
4.5V ~ 5.5V
Volatile
RFQ
IS42S16160G-7TL-TR
ISSI, Integrated Silicon Solution Inc
IC DRAM 256MBIT PAR 54TSOP II
В наявності8997 pcs
256Mbit
143 MHz
5.4 ns
DRAM
-
Parallel
-
-
-
IS42S16160
16M x 16
Tape & Reel (TR)
SDRAM
-
-
0°C ~ 70°C (TA)
Surface Mount
54-TSOP (0.400", 10.16mm Width)
54-TSOP II
3V ~ 3.6V
Volatile
RFQ
MX29LV320ETXEI-70G
Macronix
IC FLASH 32MBIT PARALLEL 48LFBGA
В наявності10803 pcs
32Mbit
-
70 ns
FLASH
70ns
Parallel
-
-
-
MX29LV320
4M x 8
Tray
FLASH - NOR
-
MX29LV
-40°C ~ 85°C (TA)
Surface Mount
48-LFBGA, CSPBGA
48-LFBGA, CSP (6x8)
2.7V ~ 3.6V
Non-Volatile
RFQ
S29GL032N11FFIS40
Infineon Technologies
IC FLASH 32MBIT PARALLEL 64FBGA
В наявності18063 pcs
32Mbit
-
110 ns
FLASH
110ns
Parallel
-
-
-
S29GL032
4M x 8, 2M x 16
Tray
FLASH - NOR
-
GL-N
-40°C ~ 85°C (TA)
Surface Mount
64-LBGA
64-FBGA (13x11)
1.65V ~ 3.6V
Non-Volatile
RFQ
SST25VF040B-50-4I-SAE
Microchip Technology
IC FLASH 4MBIT SPI 50MHZ 8SOIC
В наявності32564 pcs
4Mbit
50 MHz
-
FLASH
10µs
SPI
-
-
-
SST25VF040
512K x 8
Tube
FLASH
-
SST25
-40°C ~ 85°C (TA)
Surface Mount
8-SOIC (0.154', 3.90mm Width)
8-SOIC
2.7V ~ 3.6V
Non-Volatile
RFQ
93LC86CT-I/MC
Microchip Technology
IC EEPROM 16KBIT MICROWIRE 8DFN
В наявності43270 pcs
16Kbit
3 MHz
-
EEPROM
5ms
Microwire
-
-
-
93LC86
2K x 8, 1K x 16
Tape & Reel (TR)
EEPROM
-
-
-40°C ~ 85°C (TA)
Surface Mount
8-VFDFN Exposed Pad
8-DFN (2x3)
2.5V ~ 5.5V
Non-Volatile
RFQ
24AA04T-I/MS
Microchip Technology
IC EEPROM 4KBIT I2C 400KHZ 8MSOP
В наявності107290 pcs
4Kbit
400 kHz
900 ns
EEPROM
5ms
I²C
-
-
-
24AA04
256 x 8 x 2
Tape & Reel (TR)
EEPROM
-
-
-40°C ~ 85°C (TA)
Surface Mount
8-TSSOP, 8-MSOP (0.118', 3.00mm Width)
8-MSOP
1.7V ~ 5.5V
Non-Volatile
RFQ
S25FS256SAGMFB000
Infineon Technologies
IC FLASH 256MBIT SPI/QUAD 16SOIC
В наявності14880 pcs
256Mbit
133 MHz
-
FLASH
-
SPI - Quad I/O, QPI
-
-
-
S25FS256
32M x 8
Tray
FLASH - NOR
-
Automotive, AEC-Q100, FS-S
-40°C ~ 105°C (TA)
Surface Mount
16-SOIC (0.295", 7.50mm Width)
16-SOIC
1.7V ~ 2V
Non-Volatile
RFQ
AT29C010A-12JC
Microchip Technology
IC FLASH 1MBIT PARALLEL 32PLCC
В наявності17380 pcs
1Mbit
-
120 ns
FLASH
10ms
Parallel
-
-
-
AT29C010
128K x 8
Tube
FLASH
-
-
0°C ~ 70°C (TC)
Surface Mount
32-LCC (J-Lead)
32-PLCC (13.97x11.43)
4.5V ~ 5.5V
Non-Volatile
RFQ
FT24C16A-ELR-T
Fremont Micro Devices Ltd
IC EEPROM 16KBIT I2C SOT23-5
В наявності13260 pcs
16Kbit
1 MHz
550 ns
EEPROM
5ms
I²C
-
-
-
FT24C16
2K x 8
Tape & Reel (TR)
EEPROM
-
-
-40°C ~ 85°C
Surface Mount
SC-74A, SOT-753
SOT-23-5
1.8V ~ 5.5V
Non-Volatile
RFQ
MX30LF1G28AD-TI
Macronix
IC FLASH 1GBIT PARALLEL 48TSOP
В наявності25878 pcs
1Gbit
-
-
FLASH
20ns
Parallel
-
-
-
MX30LF1
128M x 8
Tray
FLASH - NAND (SLC)
-
MX30LF
-40°C ~ 85°C (TA)
Surface Mount
48-TFSOP (0.724", 18.40mm Width)
48-TSOP
2.7V ~ 3.6V
Non-Volatile
RFQ
S40410081B1B2W003
Cypress Semiconductor Corp
IC FLASH 8GBIT PARALLEL 100LBGA
В наявності16550 pcs
8Gbit
200 MHz
-
FLASH
-
Parallel
-
-
-
S40410081
1G x 8
Tape & Reel (TR)
FLASH - NAND
-
e.MMC 1B1
-25°C ~ 85°C (TA)
Surface Mount
100-LBGA
100-LBGA (14x18)
2.7V ~ 3.6V
Non-Volatile
RFQ
IS42S16800F-7BLI-TR
ISSI, Integrated Silicon Solution Inc
IC DRAM 128MBIT PAR 54TFBGA
В наявності19142 pcs
128Mbit
143 MHz
5.4 ns
DRAM
-
Parallel
-
-
-
IS42S16800
8M x 16
Tape & Reel (TR)
SDRAM
-
-
-40°C ~ 85°C (TA)
Surface Mount
54-TFBGA
54-TFBGA (8x8)
3V ~ 3.6V
Volatile
RFQ
IS42S16160J-7TL-TR
ISSI, Integrated Silicon Solution Inc
IC DRAM 256MBIT PAR 54TSOP II
В наявності16227 pcs
256Mbit
143 MHz
5.4 ns
DRAM
-
Parallel
-
-
-
IS42S16160
16M x 16
Tape & Reel (TR)
SDRAM
-
-
0°C ~ 70°C (TA)
Surface Mount
54-TSOP (0.400', 10.16mm Width)
54-TSOP II
3V ~ 3.6V
Volatile
RFQ
CY7C199CN-12ZXC
Infineon Technologies
IC SRAM 256KBIT PAR 28TSOP I
В наявності11680 pcs
256Kbit
-
12 ns
SRAM
12ns
Parallel
-
-
-
CY7C199
32K x 8
Tray
SRAM - Asynchronous
-
-
0°C ~ 70°C (TA)
Surface Mount
28-TSSOP (0.465", 11.80mm Width)
28-TSOP I
4.5V ~ 5.5V
Volatile
RFQ
24LC08BT/SN
Microchip Technology
IC EEPROM 8KBIT I2C 400KHZ 8SOIC
В наявності112120 pcs
8Kbit
400 kHz
900 ns
EEPROM
5ms
I²C
-
-
-
24LC08
256 x 8 x 4
Tape & Reel (TR)
EEPROM
-
-
0°C ~ 70°C (TA)
Surface Mount
8-SOIC (0.154', 3.90mm Width)
8-SOIC
2.5V ~ 5.5V
Non-Volatile
RFQ
W631GG8KB-12
Winbond Electronics
IC DRAM 1GBIT PARALLEL 78WBGA
В наявності3690 pcs
1Gbit
800 MHz
20 ns
DRAM
-
Parallel
-
-
-
W631GG8
128M x 8
Tray
SDRAM - DDR3
-
-
0°C ~ 95°C (TC)
Surface Mount
78-TFBGA
78-WBGA (10.5x8)
1.425V ~ 1.575V
Volatile
RFQ
CAT24AA04WI-G
onsemi
IC EEPROM 4KBIT I2C 1MHZ 8SOIC
В наявності12410 pcs
4Kbit
1 MHz
400 ns
EEPROM
5ms
I²C
-
-
-
CAT24
512 x 8
Tube
EEPROM
-
-
-40°C ~ 85°C (TA)
Surface Mount
8-SOIC (0.154", 3.90mm Width)
8-SOIC
1.7V ~ 5.5V
Non-Volatile
RFQ
S-24C512CI-J8T1U4
ABLIC Inc.
IC EEPROM 512KBIT I2C 1MHZ 8SOP
В наявності19346 pcs
512Kbit
1 MHz
900 ns
EEPROM
5ms
I²C
-
-
-
S-24C512
64K x 8
Tape & Reel (TR)
EEPROM
-
-
-40°C ~ 85°C (TA)
Surface Mount
8-SOIC (0.154', 3.90mm Width)
8-SOP
1.6V ~ 5.5V
Non-Volatile
RFQ
IS43TR16128B-15HBL
ISSI, Integrated Silicon Solution Inc
IC DRAM 2GBIT PAR 96TWBGA
В наявності10120 pcs
2Gbit
667 MHz
20 ns
DRAM
15ns
Parallel
-
-
-
IS43TR16128
128M x 16
Tray
SDRAM - DDR3
-
-
0°C ~ 95°C (TC)
Surface Mount
96-TFBGA
96-TWBGA (9x13)
1.425V ~ 1.575V
Volatile
RFQ
CY7C1021CV33-15ZC
Infineon Technologies
IC SRAM 1MBIT PARALLEL 44TSOP II
В наявності12030 pcs
1Mbit
-
15 ns
SRAM
15ns
Parallel
-
-
-
CY7C1021
64K x 16
Bag
SRAM - Asynchronous
-
-
0°C ~ 70°C (TA)
Surface Mount
44-TSOP (0.400', 10.16mm Width)
44-TSOP II
3V ~ 3.6V
Volatile
RFQ
MX25L25635FMI-10G
Macronix
IC FLASH 256MBIT SPI 16SOP
В наявності10212 pcs
256Mbit
104 MHz
-
FLASH
30µs, 3ms
SPI
-
-
-
MX25L25635
32M x 8
Tube
FLASH - NOR
-
MX25xxx35/36 - MXSMIO™
-40°C ~ 85°C (TA)
Surface Mount
16-SOIC (0.295', 7.50mm Width)
16-SOP
2.7V ~ 3.6V
Non-Volatile
RFQ
JS28F256P30T95A
Micron Technology Inc.
IC FLASH 256MBIT PAR 56TSOP
В наявності15220 pcs
256Mbit
40 MHz
95 ns
FLASH
95ns
Parallel
-
-
-
JS28F256P30
16M x 16
Tray
FLASH - NOR
-
StrataFlash™
-40°C ~ 85°C (TA)
Surface Mount
56-TFSOP (0.724', 18.40mm Width)
56-TSOP
1.7V ~ 2V
Non-Volatile
RFQ
LH5164A-10LF
Sharp Microelectronics
IC SRAM 64KBIT PARALLEL 28DIP
В наявності17190 pcs
64Kbit
-
100 ns
SRAM
100ns
Parallel
-
-
-
LH5164
8K x 8
Tube
SRAM
-
-
-10°C ~ 70°C (TA)
Through Hole
28-DIP (0.600", 15.24mm)
28-DIP
4.5V ~ 5.5V
Volatile
RFQ
IS43R16160D-6BI
ISSI, Integrated Silicon Solution Inc
IC DRAM 256MBIT PAR 60TFBGA
В наявності14190 pcs
256Mbit
166 MHz
700 ps
DRAM
15ns
Parallel
-
-
-
IS43R16160
16M x 16
Tray
SDRAM - DDR
-
-
-40°C ~ 85°C (TA)
Surface Mount
60-TFBGA
60-TFBGA (8x13)
2.3V ~ 2.7V
Volatile
RFQ
AM27C010-150DI
Rochester Electronics, LLC
IC EPROM 1MBIT PARALLEL 32CDIP
В наявності8090 pcs
1Mbit
-
150 ns
EPROM
-
Parallel
-
-
-
AM27C010
128K x 8
Bulk
EPROM - UV
-
-
-40°C ~ 85°C (TA)
Through Hole
32-CDIP (0.600", 15.24mm)
32-CDIP
4.5V ~ 5.5V
Non-Volatile
RFQ
DS1230AB-150
Analog Devices Inc./Maxim Integrated
IC NVSRAM 256KBIT PAR 28EDIP
В наявності8690 pcs
256Kbit
-
150 ns
NVSRAM
150ns
Parallel
-
-
-
DS1230AB
32K x 8
Tube
NVSRAM (Non-Volatile SRAM)
-
-
0°C ~ 70°C (TA)
Through Hole
28-DIP Module (0.600', 15.24mm)
28-EDIP
4.75V ~ 5.25V
Non-Volatile
RFQ
MX29GL640EBXEI-70G
Macronix
IC FLASH 64MBIT PARALLEL 48LFBGA
В наявності10484 pcs
64Mbit
-
70 ns
FLASH
70ns
Parallel
-
-
-
MX29GL640
8M x 8
Tray
FLASH - NOR
-
MX29GL
-40°C ~ 85°C (TA)
Surface Mount
48-LFBGA, CSPBGA
48-LFBGA, CSP (6x8)
2.7V ~ 3.6V
Non-Volatile
RFQ
CY7C130-55PC
Infineon Technologies
IC SRAM 8KBIT 55NS 48DIP
В наявності11218 pcs
8Kbit
-
55 ns
SRAM
55ns
Parallel
-
-
-
CY7C130
1K x 8
Tube
SRAM - Dual Port, Asynchronous
-
-
0°C ~ 70°C (TA)
Through Hole
48-DIP (0.600", 15.24mm)
48-PDIP
4.5V ~ 5.5V
Volatile
RFQ
AT29LV512-15JU
Microchip Technology
IC FLASH 512KBIT PARALLEL 32PLCC
В наявності9390 pcs
512Kbit
-
150 ns
FLASH
20ms
Parallel
-
-
-
AT29LV512
64K x 8
Tube
FLASH
-
-
-40°C ~ 85°C (TC)
Surface Mount
32-LCC (J-Lead)
32-PLCC (13.97x11.43)
3V ~ 3.6V
Non-Volatile
RFQ
R1LV5256ESA-5SR#S0
Renesas Electronics America Inc
IC SRAM 256KBIT PARALLEL 28TSOP
В наявності4090 pcs
256Kbit
-
55 ns
SRAM
55ns
Parallel
-
-
-
R1LV5256
32K x 8
Tape & Reel (TR)
SRAM
-
-
0°C ~ 70°C (TA)
Surface Mount
28-TSSOP (0.465', 11.80mm Width)
28-TSOP
2.7V ~ 3.6V
Volatile
RFQ
AT29LV1024-15TC
Microchip Technology
IC FLASH 1MBIT PARALLEL 48TSOP
В наявності16800 pcs
1Mbit
-
150 ns
FLASH
20ms
Parallel
-
-
-
AT29LV1024
64K x 16
Tray
FLASH
-
-
0°C ~ 70°C (TC)
Surface Mount
48-TFSOP (0.724', 18.40mm Width)
48-TSOP
3V ~ 3.6V
Non-Volatile
RFQ
S29GL032N11FFIV10
Infineon Technologies
IC FLASH 32MBIT PARALLEL 64FBGA
В наявності11450 pcs
32Mbit
-
110 ns
FLASH
110ns
Parallel
-
-
-
S29GL032
4M x 8, 2M x 16
Tray
FLASH - NOR
-
GL-N
-40°C ~ 85°C (TA)
Surface Mount
64-LBGA
64-FBGA (13x11)
1.65V ~ 3.6V
Non-Volatile
RFQ
AT93C56B-MAHM-T
Microchip Technology
IC EEPROM 2KBIT 3-WIRE 8MINI MAP
В наявності136230 pcs
2Kbit
2 MHz
-
EEPROM
5ms
3-Wire Serial
-
-
-
93C56B
256 x 8, 128 x 16
Tape & Reel (TR)
EEPROM
-
-
-40°C ~ 85°C (TA)
Surface Mount
8-UFDFN Exposed Pad
8-Mini Map (2x3)
1.7V ~ 5.5V
Non-Volatile
RFQ
CY7C1069G30-10ZSXIT
Infineon Technologies
IC SRAM 16MBIT PAR 54TSOP II
В наявності901 pcs
16Mbit
-
10 ns
SRAM
10ns
Parallel
-
-
-
CY7C1069
2M x 8
Tape & Reel (TR)
SRAM - Asynchronous
-
-
-40°C ~ 85°C (TA)
Surface Mount
54-TSOP (0.400", 10.16mm Width)
54-TSOP II
2.2V ~ 3.6V
Volatile
RFQ
AT25DF081A-SH-T
Adesto Technologies
IC FLASH 8MBIT SPI 100MHZ 8SOIC
В наявності31484 pcs
8Mbit
100 MHz
-
FLASH
7µs, 3ms
SPI
-
-
-
AT25DF081
256 Bytes x 4096 pages
Tape & Reel (TR)
FLASH
-
-
-40°C ~ 85°C (TC)
Surface Mount
8-SOIC (0.209", 5.30mm Width)
8-SOIC
2.7V ~ 3.6V
Non-Volatile
RFQ
25LC080C-I/ST
Microchip Technology
IC EEPROM 8KBIT SPI 10MHZ 8TSSOP
В наявності56280 pcs
8Kbit
10 MHz
-
EEPROM
5ms
SPI
-
-
-
25LC080
1K x 8
Tube
EEPROM
-
-
-40°C ~ 85°C (TA)
Surface Mount
8-TSSOP (0.173', 4.40mm Width)
8-TSSOP
2.5V ~ 5.5V
Non-Volatile
RFQ
S29AL008J70BFA020
Cypress Semiconductor
IC FLASH 8M PARALLEL 48FBGA
В наявності13540 pcs
8Mb (1M x 8, 512K x 16)
-
70ns
FLASH
70ns
Parallel
Tray
Lead free / RoHS Compliant
3 (168 Hours)
-
-
-
FLASH - NOR
FLASH - NOR Memory IC 8Mb (1M x 8, 512K x 16) Parallel 70ns 48-FBGA (8.15x6.15)
Automotive, AEC-Q100, AL-J
-40°C ~ 85°C (TA)
Surface Mount
48-VFBGA
48-FBGA (8.15x6.15)
2.7 V ~ 3.6 V
Non-Volatile
RFQ
S25FL128SDSBHI210
Infineon Technologies
IC FLASH 128MBIT SPI/QUAD 24BGA
В наявності11454 pcs
128Mbit
80 MHz
-
FLASH
-
SPI - Quad I/O
-
-
-
S25FL128
16M x 8
Tray
FLASH - NOR
-
FL-S
-40°C ~ 85°C (TA)
Surface Mount
24-TBGA
24-BGA (8x6)
2.7V ~ 3.6V
Non-Volatile
RFQ
S34ML04G100TFI003
Cypress Semiconductor Corp
IC FLASH 4GBIT PARALLEL 48TSOP
В наявності11590 pcs
4Gbit
-
-
FLASH
25ns
Parallel
-
-
-
S34ML04
512M x 8
Tape & Reel (TR)
FLASH - NAND
-
ML-1
-40°C ~ 85°C (TA)
Surface Mount
48-TFSOP (0.724", 18.40mm Width)
48-TSOP
2.7V ~ 3.6V
Non-Volatile
RFQ
M24256-BRMN6TP
STMicroelectronics
IC EEPROM 256KBIT I2C 1MHZ 8SOIC
В наявності105570 pcs
256Kbit
1 MHz
450 ns
EEPROM
5ms
I²C
-
-
-
M24256
32K x 8
Tape & Reel (TR)
EEPROM
-
-
-40°C ~ 85°C (TA)
Surface Mount
8-SOIC (0.154', 3.90mm Width)
8-SOIC
1.8V ~ 5.5V
Non-Volatile
RFQ
AT24C08AN-10SI-1.8
Microchip Technology
IC EEPROM 8KBIT I2C 400KHZ 8SOIC
В наявності6620 pcs
8Kbit
400 kHz
4.5 µs
EEPROM
5ms
I²C
-
-
-
AT24C08
1K x 8
Tube
EEPROM
-
-
-40°C ~ 85°C (TA)
Surface Mount
8-SOIC (0.154", 3.90mm Width)
8-SOIC
1.8V ~ 5.5V
Non-Volatile
RFQ
AT25320AN-10SU-2.7
Microchip Technology
IC EEPROM 32KBIT SPI 20MHZ 8SOIC
В наявності14780 pcs
32Kbit
20 MHz
-
EEPROM
5ms
SPI
-
-
-
AT25320
4K x 8
Tube
EEPROM
-
-
-40°C ~ 85°C (TA)
Surface Mount
8-SOIC (0.154", 3.90mm Width)
8-SOIC
2.7V ~ 5.5V
Non-Volatile
RFQ
W25Q32FVZEIG
Winbond Electronics
IC FLASH 32MBIT SPI/QUAD 8WSON
В наявності8440 pcs
32Mbit
104 MHz
-
FLASH
50µs, 3ms
SPI - Quad I/O, QPI
-
-
-
W25Q32
4M x 8
Tube
FLASH - NOR
-
SpiFlash®
-40°C ~ 85°C (TA)
Surface Mount
8-WDFN Exposed Pad
8-WSON (8x6)
2.7V ~ 3.6V
Non-Volatile
RFQ
AT24C256C-MAHL-T
Atmel
IC EEPROM 256KBIT I2C 1MHZ 8UDFN
В наявності5320 pcs
256Kbit
1 MHz
550 ns
EEPROM
5ms
I²C
-
-
-
AT24C256C
32K x 8
Bulk
EEPROM
-
-
-40°C ~ 85°C (TA)
Surface Mount
8-UFDFN Exposed Pad
8-UDFN (2x3)
1.7V ~ 5.5V
Non-Volatile
RFQ