Voltage Supervisors

Name	Manufacturer	Quantity	Datasheet	Factory Lead Time	Lifecycle Status	Mount	Packaging	Published	Series	Pbfree Code	Part Status	Moisture Sensitivity Level (MSL)	Number of Terminations	ECCN Code	Max Operating Temperature	Min Operating Temperature	Length	RoHS Status	Lead Free	Radiation Hardening	Number of Pins	Additional Feature	Package / Case	Max Supply Voltage	Reach Compliance Code	Min Supply Voltage	Height	Width	Thickness	Mounting Type	Operating Temperature	Technology	Operating Supply Current	Max Supply Current	Height Seated (Max)	HTS Code	Number of Functions	Nominal Supply Current	Type	JESD-609 Code	Terminal Finish	Terminal Position	Terminal Form	Peak Reflow Temperature (Cel)	Supply Voltage	Time@Peak Reflow Temperature-Max (s)	Base Part Number	Pin Count	Temperature Grade	Surface Mount	Terminal Pitch	JESD-30 Code	Supply Voltage-Min (Vsup)	Operating Temperature (Max)	Operating Temperature (Min)	Number of Channels	Subcategory	Qualification Status	Power Supplies	Supply Voltage-Max (Vsup)	Max Power Dissipation	Analog IC - Other Type	Power Dissipation	Output	Supply Current-Max (Isup)	Watchdog Timer	Number of Voltages Monitored	Threshold Voltage	Adjustable Threshold	Min Reset Threshold Voltage	Max Reset Threshold Voltage	Undervoltage Threshold	Overvoltage Threshold	Supplier Device Package	Power Dissipation-Max	Quiescent Current	Voltage - Threshold	Reset	Number of Monitored Inputs	Reset Timeout	Reset Delay Time
S-80920CNPF-G8QTFU	ABLIC U.S.A. Inc.	RFQ Min: 1 Mult: 1	download	18 Weeks			Tape & Reel (TR)		S-809xxC		Active	1 (Unlimited)	4					RoHS Compliant				DETECTION VOLTAGE IS 2.0V	4-SMD, Flat Leads							Surface Mount	-40°C~85°C TA	CMOS			0.5mm		1		Voltage Detector	e3	Tin (Sn)	DUAL		NOT SPECIFIED	1.2V	NOT SPECIFIED		4		YES	0.65mm	R-PDSO-F4	0.7V			1								Open Drain or Open Collector			1		NO								2V	Active Low		20ms Minimum
ADM803LAKSZ-REEL	Analog Devices Inc.	RFQ Min: 1 Mult: 1	download	12 Weeks	PRODUCTION (Last Updated: 4 weeks ago)	Surface Mount	Tape & Reel (TR)			no	Active	1 (Unlimited)	3	EAR99			2mm	ROHS3 Compliant	Contains Lead		3		SC-70, SOT-323	5.5V		1V				Surface Mount	-40°C~125°C TA	CMOS	35μA	60μA			1	60μA	Simple Reset/Power-On Reset	e3	Matte Tin (Sn)	DUAL	GULL WING	260	5V	40	ADM803	3			0.65mm					1	Power Management Circuits		5V					Open Drain or Open Collector		No		+4.63V	NO	4.56V	4.7V	4.56V	4.7V				4.63V	Active Low	1	140ms Minimum	840 ms
S-80127CNPF-JKMTFU	ABLIC U.S.A. Inc.	RFQ Min: 1 Mult: 1	download	18 Weeks			Tape & Reel (TR)		S-801		Active	1 (Unlimited)	4	EAR99				RoHS Compliant					4-SMD, Flat Leads							Surface Mount	-40°C~85°C TA	CMOS			0.5mm		1		Voltage Detector	e3	Tin (Sn)	DUAL			4.5V			4		YES	0.65mm	R-PDSO-F4	0.95V			1		Not Qualified						Open Drain or Open Collector			1		NO								2.7V	Active Low		130ms Minimum
XC6135C26BNR-G	Torex Semiconductor Ltd	RFQ Min: 1 Mult: 1	download	10 Weeks			Tape & Reel (TR)				Active	1 (Unlimited)						ROHS3 Compliant
S-1003CA13I-M5T1U	ABLIC U.S.A. Inc.	RFQ Min: 1 Mult: 1	download	18 Weeks			Tape & Reel (TR)		S-1003		Active	1 (Unlimited)	5	EAR99			2.9mm	RoHS Compliant					SC-74A, SOT-753		unknown					Surface Mount	-40°C~85°C TA	CMOS					1		Voltage Detector	e3	Tin (Sn)	DUAL	GULL WING	NOT SPECIFIED	1.2V	NOT SPECIFIED				YES	0.95mm	R-PDSO-G5	0.95V			1								Push-Pull, Totem Pole			1		NO								1.3V	Active Low
S-1000C30-I4T1U	ABLIC U.S.A. Inc.	RFQ Min: 1 Mult: 1	download	18 Weeks			Tape & Reel (TR)		S-1000		Active	1 (Unlimited)	4	EAR99				RoHS Compliant				DETECTION THRESHOLD VOLTAGE IS 3.0V	4-SMD, Flat Leads							Surface Mount	-40°C~85°C TA	CMOS			0.5mm		1		Voltage Detector	e3	Tin (Sn)	DUAL		260	1.2V	10		4		YES	0.65mm	R-PDSO-F4	0.95V			1		Not Qualified		5.5V				Push-Pull, Totem Pole			1		NO								3V	Active Low
XC6127C30FNR-G	Torex Semiconductor Ltd	RFQ Min: 1 Mult: 1	download	10 Weeks			Tape & Reel (TR)				Active	1 (Unlimited)	4	EAR99			2mm	ROHS3 Compliant				DETECT VOLTAGE IS 3.0V						1.25mm				CMOS			1.1mm	8542.39.00.01	1			e3	Tin (Sn)	DUAL	GULL WING	260	1V	10			INDUSTRIAL	YES	1.3mm	R-PDSO-G4	0.7V	85°C	-40°C	1	Power Management Circuits	Not Qualified	0.8/5.5V	6V		POWER SUPPLY SUPPORT CIRCUIT			0.0019mA			+3V	NO
XC6129N26F7R-G	Torex Semiconductor Ltd	RFQ Min: 1 Mult: 1	download	10 Weeks			Tape & Reel (TR)				Active	1 (Unlimited)	4	EAR99			1.2mm	ROHS3 Compliant				DETECT VOLTAGE IS 2.6V						0.9mm				CMOS			0.4mm	8542.39.00.01	1			e4	Nickel/Gold (Ni/Au)	DUAL	NO LEAD	260	2V	10			INDUSTRIAL	YES	0.55mm	R-PDSO-N4	1.3V	85°C	-40°C	1				6V		POWER SUPPLY SUPPORT CIRCUIT							NO
S-1003NB38I-I6T1U	ABLIC U.S.A. Inc.	RFQ Min: 1 Mult: 1	download	18 Weeks			Tape & Reel (TR)		S-1003		Active	1 (Unlimited)						RoHS Compliant					6-SMD, Flat Leads							Surface Mount	-40°C~85°C TA								Voltage Detector																									Open Drain or Open Collector			1							SNT-6A			3.8V	Active Low
ADM1812-5AKSZ-REEL	Analog Devices Inc.	RFQ Min: 1 Mult: 1	download			Surface Mount	Tape & Reel (TR)			no	Obsolete	1 (Unlimited)	3	EAR99			2mm	ROHS3 Compliant	Contains Lead		3		SC-70, SOT-323	5.5V		1V				Surface Mount	-40°C~105°C TA		16μA	16μA			1	16μA	Simple Reset/Power-On Reset	e3	Matte Tin (Sn)	DUAL	GULL WING	260	5V	40	ADM1812	3			0.65mm					1	Power Management Circuits							Push-Pull, Totem Pole		No		+4.62V	NO	4.5V	4.75V	4.5V	4.75V				4.62V	Active High	1	100ms Minimum	250 ms
S-80844CNNB-B85T2U	ABLIC U.S.A. Inc.	RFQ Min: 1 Mult: 1	download	18 Weeks			Tape & Reel (TR)		S-808xxC		Active	1 (Unlimited)	4	EAR99			2mm	RoHS Compliant					SC-82A, SOT-343							Surface Mount	-40°C~85°C TA	CMOS					1		Voltage Detector	e3	Tin (Sn)	DUAL	GULL WING		6V			4		YES		R-PDSO-G4	0.95V			1	Power Management Circuits	Not Qualified						Open Drain or Open Collector	0.0027mA		1	+4.4V	NO								4.4V	Active Low
S-80133CNPF-JKSTFU	ABLIC U.S.A. Inc.	RFQ Min: 1 Mult: 1	download	18 Weeks			Tape & Reel (TR)		S-801		Active	1 (Unlimited)	4	EAR99				RoHS Compliant				DETECTION THRESHOLD VOLTAGE IS 3.3.V	4-SMD, Flat Leads							Surface Mount	-40°C~85°C TA	CMOS			0.5mm		1		Voltage Detector	e3	Tin (Sn)	DUAL			4.5V			4		YES	0.65mm	R-PDSO-F4	0.95V			1		Not Qualified						Open Drain or Open Collector			1		NO								3.3V	Active Low		130ms Minimum
S-1009N17I-I4T1U	ABLIC U.S.A. Inc.	RFQ Min: 1 Mult: 1	download	18 Weeks			Tape & Reel (TR)		S-1009		Active	1 (Unlimited)	4	EAR99				RoHS Compliant					4-SMD, Flat Leads							Surface Mount	-40°C~85°C TA	CMOS			0.5mm		1		Voltage Detector	e3	TIN	DUAL			2.3V			4		YES	0.65mm	R-PDSO-F4	0.7V			1								Open Drain or Open Collector			1		NO								1.7V	Active Low
X40020S14I-CT1	Renesas Electronics America Inc.	RFQ Min: 1 Mult: 1	download				Tape & Reel (TR)				Obsolete	1 (Unlimited)						Non-RoHS Compliant					14-SOIC (0.154, 3.90mm Width)							Surface Mount	-40°C~85°C TA								Multi-Voltage Supervisor								X40020																	Open Drain or Open Collector			2										1.6V 2.9V	Active High		Adjustable/Selectable
XC6127N46FMR-G	Torex Semiconductor Ltd	RFQ Min: 1 Mult: 1	download	10 Weeks			Tape & Reel (TR)				Active	1 (Unlimited)	5	EAR99			2.9mm	ROHS3 Compliant				DETECT VOLTAGE IS 4.6V						1.6mm				CMOS			1.3mm	8542.39.00.01	1			e3	Tin (Sn)	DUAL	GULL WING	260	1V	10			INDUSTRIAL	YES	0.95mm	R-PDSO-G5	0.7V	85°C	-40°C	1	Power Management Circuits	Not Qualified	0.8/5.5V	6V		POWER SUPPLY SUPPORT CIRCUIT			0.00235mA			+4.6V	NO
S-1009C23I-N4T1U	ABLIC U.S.A. Inc.	RFQ Min: 1 Mult: 1	download	18 Weeks			Tape & Reel (TR)		S-1009		Active	1 (Unlimited)	4	EAR99			2mm	RoHS Compliant					SC-82A, SOT-343							Surface Mount	-40°C~85°C TA	CMOS					1		Voltage Detector	e3	TIN	DUAL	GULL WING		2.9V			4		YES		R-PDSO-G4	0.6V			1		Not Qualified						Push-Pull, Totem Pole			1		NO								2.3V	Active Low
XC6109N23ANR-G	Torex Semiconductor Ltd	RFQ Min: 1 Mult: 1	download			Surface Mount	Tape & Reel (TR)	2009			Active	1 (Unlimited)						ROHS3 Compliant					SC-82							Surface Mount	-40°C~85°C TA	CMOS							Voltage Detector	e3	Tin (Sn)																Power Management Circuits	Not Qualified	0.7/6V					Open Drain or Open Collector	0.002mA		1	+2.3V	NO								2.3V	Active Low
XC6127N51K7R-G	Torex Semiconductor Ltd	RFQ Min: 1 Mult: 1	download	10 Weeks			Tape & Reel (TR)				Active	1 (Unlimited)	4	EAR99			1.2mm	ROHS3 Compliant				DETECT VOLTAGE IS 5.1V						0.9mm				CMOS			0.4mm	8542.39.00.01	1			e4	Nickel/Gold (Ni/Au)	DUAL	NO LEAD	260	1V	10			INDUSTRIAL	YES	0.55mm	R-PDSO-N4	0.7V	85°C	-40°C	1	Power Management Circuits	Not Qualified	0.8/5.5V	6V		POWER SUPPLY SUPPORT CIRCUIT			0.00235mA			+5.1V	NO
XC6136N14BNR-G	Torex Semiconductor Ltd	RFQ Min: 1 Mult: 1	download	10 Weeks			Tape & Reel (TR)				Active	1 (Unlimited)						ROHS3 Compliant																																												POWER SUPPLY SUPPORT CIRCUIT
MAX6439UTBIZD7+	Maxim Integrated	RFQ Min: 1 Mult: 1				Surface Mount				yes					85°C	-40°C		RoHS Compliant		No	6		SOT-23	5.5V		1V																																				POWER SUPPLY SUPPORT CIRCUIT								3.413V	3.588V				695mW
S-80145CLPF-JI6TFU	ABLIC U.S.A. Inc.	RFQ Min: 1 Mult: 1	download	18 Weeks			Tape & Reel (TR)		S-801		Active	1 (Unlimited)	4	EAR99				RoHS Compliant				DETECTION THRESHOLD VOLTAGE IS 4.5.V	4-SMD, Flat Leads							Surface Mount	-40°C~85°C TA	CMOS			0.5mm		1		Voltage Detector	e3	Tin (Sn)	DUAL			6.5V			4		YES	0.65mm	R-PDSO-F4	0.95V			1		Not Qualified						Push-Pull, Totem Pole			1		NO								4.5V	Active Low		130ms Minimum
XC6129N29G7R-G	Torex Semiconductor Ltd	RFQ Min: 1 Mult: 1	download	10 Weeks			Tape & Reel (TR)				Active	1 (Unlimited)	4	EAR99			1.2mm	ROHS3 Compliant				DETECT VOLTAGE IS 2.9V						0.9mm				CMOS			0.4mm	8542.39.00.01	1			e4	Nickel/Gold (Ni/Au)	DUAL	NO LEAD	260	2V	10			INDUSTRIAL	YES	0.55mm	R-PDSO-N4	1.3V	85°C	-40°C	1				6V		POWER SUPPLY SUPPORT CIRCUIT							NO
XC6109N12ANR-G	Torex Semiconductor Ltd	RFQ Min: 1 Mult: 1	download			Surface Mount	Tape & Reel (TR)	2009			Active	1 (Unlimited)						ROHS3 Compliant					SC-82							Surface Mount	-40°C~85°C TA	CMOS							Voltage Detector	e3	Tin (Sn)						XC6109										Power Management Circuits	Not Qualified	0.7/6V					Open Drain or Open Collector			1	+1.2V	NO								1.2V	Active Low
TLC7705QPWRG4Q1	Texas Instruments	RFQ Min: 1 Mult: 1		6 Weeks	ACTIVE (Last Updated: 2 days ago)		Tape & Reel (TR)		Automotive, AEC-Q100	yes	Active	1 (Unlimited)	8	EAR99			3mm	ROHS3 Compliant	Lead Free		8	RESET THRESHOLD VOLTAGE IS 4.5V; POWER-ON RESET GENERATOR	8-TSSOP (0.173, 4.40mm Width)	6V		2V	1.2mm	4.4mm	1mm	Surface Mount	-40°C~125°C TA	CMOS	16μA	16μA			1		Simple Reset/Power-On Reset	e4	Nickel/Palladium/Gold (Ni/Pd/Au)	DUAL	GULL WING	260	2.7V		TLC7705	8		YES	0.65mm					1	Power Management Circuits				525mW		525mW	Push-Pull, Totem Pole		No	1	+4.55V	NO	4.47V	4.63V	4.47V	4.63V			9μA	4.55V	Active High/Active Low		1.1ms Minimum
XC6129C21ENR-G	Torex Semiconductor Ltd	RFQ Min: 1 Mult: 1	download	10 Weeks			Tape & Reel (TR)				Active	1 (Unlimited)	4	EAR99			2mm	ROHS3 Compliant				DETECT VOLTAGE IS 2.1V						1.25mm				CMOS			1.1mm	8542.39.00.01	1			e3	Tin (Sn)	DUAL	GULL WING	260	2V	10			INDUSTRIAL	YES	1.3mm	R-PDSO-G4	1.3V	85°C	-40°C	1				6V		POWER SUPPLY SUPPORT CIRCUIT							NO
MXD1816XR22+T	Maxim Integrated	RFQ Min: 1 Mult: 1	download	6 Weeks		Surface Mount	Tape & Reel (TR)	2006		yes	Active	1 (Unlimited)	3	EAR99			2mm	ROHS3 Compliant	Lead Free				SC-70, SOT-323	5.5V		1V				Surface Mount	-40°C~105°C TA	BICMOS	9μA				1		Simple Reset/Power-On Reset	e3	Matte Tin (Sn)	DUAL	GULL WING	260	3.6V		MXD1816	3			0.65mm	R-PDSO-G3				1	Power Management Circuits				174mW			Open Drain or Open Collector		No	1	+2.18V	NO	2.12V	2.25V	2.12V	2.25V				2.18V	Active Low		100ms Minimum
XC6129C28FNR-G	Torex Semiconductor Ltd	RFQ Min: 1 Mult: 1	download	10 Weeks			Tape & Reel (TR)				Active	1 (Unlimited)	4	EAR99			2mm	ROHS3 Compliant				DETECT VOLTAGE IS 2.8V						1.25mm				CMOS			1.1mm	8542.39.00.01	1			e3	Tin (Sn)	DUAL	GULL WING	260	2V	10			INDUSTRIAL	YES	1.3mm	R-PDSO-G4	1.3V	85°C	-40°C	1				6V		POWER SUPPLY SUPPORT CIRCUIT							NO
X5163S8IZ-2.7T1	Renesas Electronics America Inc.	RFQ Min: 1 Mult: 1	download	7 Weeks			Tape & Reel (TR)				Active	1 (Unlimited)	8	EAR99			4.9mm	ROHS3 Compliant				WATCHDOG TIMER	8-SOIC (0.154, 3.90mm Width)					3.9mm		Surface Mount	-40°C~85°C TA	CMOS					1		Simple Reset/Power-On Reset	e3	Matte Tin (Sn) - annealed	DUAL	GULL WING	260	5V	40	X5163	8		YES		R-PDSO-G8	2.7V			1		Not Qualified		5.5V				Open Drain or Open Collector			1		YES								2.63V	Active Low		100ms Minimum
XC6129N39L9R-G	Torex Semiconductor Ltd	RFQ Min: 1 Mult: 1	download	10 Weeks			Tape & Reel (TR)				Active	1 (Unlimited)	4				1mm	ROHS3 Compliant										1mm				CMOS			0.33mm		1					DUAL	NO LEAD		5V				INDUSTRIAL	YES	0.65mm	S-PDSO-N4	1.3V	85°C	-40°C	1				6V		POWER SUPPLY SUPPORT CIRCUIT			0.00131mA			+3.9	NO
XC6132C16FMR-G	Torex Semiconductor Ltd	RFQ Min: 1 Mult: 1	download	10 Weeks			Tape & Reel (TR)				Active	1 (Unlimited)	6	EAR99			2.9mm	ROHS3 Compliant				DETECT VOLTAGE IS 1.6V						1.6mm				CMOS			1.3mm	8542.39.00.01	1			e3	Tin (Sn)	DUAL	GULL WING		2V				AUTOMOTIVE	YES	0.95mm	R-PDSO-G6	1.6V	125°C	-40°C	1				6V		POWER SUPPLY SUPPORT CIRCUIT							YES

S-80920CNPF-G8QTFU ABLIC U.S.A. Inc.
1.2V4 Terminals 4-Pin Voltage supervisorS-809xxC Series 1 Channels

Price: 0.0000
RFQ
ADM803LAKSZ-REEL Analog Devices Inc.
5V3 Terminals 3-Pin ADM803 Voltage supervisor1 Channels Min 1V Max 5.5V

Price: 0.0000
RFQ
S-80127CNPF-JKMTFU ABLIC U.S.A. Inc.
4.5V4 Terminals 4-Pin Voltage supervisorS-801 Series 1 Channels

Price: 0.0000
RFQ
XC6135C26BNR-G Torex Semiconductor Ltd
Voltage supervisor

Price: 0.0000
RFQ
S-1003CA13I-M5T1U ABLIC U.S.A. Inc.
1.2V 5 Terminals Voltage supervisor S-1003 Series 1 Channels

Price: 0.0000
RFQ
S-1000C30-I4T1U ABLIC U.S.A. Inc.
1.2V 4 Terminals 4-Pin Voltage supervisor S-1000 Series 1 Channels

Price: 0.0000
RFQ
XC6127C30FNR-G Torex Semiconductor Ltd
1V 4 Terminals Voltage supervisor 1 Channels

Price: 0.0000
RFQ
XC6129N26F7R-G Torex Semiconductor Ltd
2V 4 Terminals Voltage supervisor 1 Channels

Price: 0.0000
RFQ
S-1003NB38I-I6T1U ABLIC U.S.A. Inc.
Voltage supervisor S-1003 Series

Price: 0.0000
RFQ
ADM1812-5AKSZ-REEL Analog Devices Inc.
5V3 Terminals 3-Pin ADM1812 Voltage supervisor1 Channels Min 1V Max 5.5V

Price: 0.0000
RFQ
S-80844CNNB-B85T2U ABLIC U.S.A. Inc.
6V4 Terminals 4-Pin Voltage supervisorS-808xxC Series 1 Channels

Price: 0.0000
RFQ
S-80133CNPF-JKSTFU ABLIC U.S.A. Inc.
4.5V 4 Terminals 4-Pin Voltage supervisor S-801 Series 1 Channels

Price: 0.0000
RFQ
S-1009N17I-I4T1U ABLIC U.S.A. Inc.
2.3V4 Terminals 4-Pin Voltage supervisorS-1009 Series 1 Channels

Price: 0.0000
RFQ
X40020S14I-CT1 Renesas Electronics America Inc.
X40020 Voltage supervisor

Price: 0.0000
RFQ
XC6127N46FMR-G Torex Semiconductor Ltd
1V 5 Terminals Voltage supervisor 1 Channels

Price: 0.0000
RFQ
S-1009C23I-N4T1U ABLIC U.S.A. Inc.
2.9V4 Terminals 4-Pin Voltage supervisorS-1009 Series 1 Channels

Price: 0.0000
RFQ
XC6109N23ANR-G Torex Semiconductor Ltd
Voltage supervisor

Price: 0.0000
RFQ
XC6127N51K7R-G Torex Semiconductor Ltd
1V 4 Terminals Voltage supervisor 1 Channels

Price: 0.0000
RFQ
XC6136N14BNR-G Torex Semiconductor Ltd
Voltage supervisor

Price: 0.0000
RFQ
MAX6439UTBIZD7+ Maxim Integrated
Voltage supervisor Min 1V Max 5.5V

Price: 0.0000
RFQ
S-80145CLPF-JI6TFU ABLIC U.S.A. Inc.
6.5V 4 Terminals 4-Pin Voltage supervisor S-801 Series 1 Channels

Price: 0.0000
RFQ
XC6129N29G7R-G Torex Semiconductor Ltd
2V 4 Terminals Voltage supervisor 1 Channels

Price: 0.0000
RFQ
XC6109N12ANR-G Torex Semiconductor Ltd
XC6109 Voltage supervisor

Price: 0.0000
RFQ
TLC7705QPWRG4Q1 Texas Instruments
2.7V8 Terminals 8-Pin TLC7705 Voltage supervisorAutomotive, AEC-Q100 Series 1 Channels Min 2V Max 6V

Price: 0.0000
RFQ
XC6129C21ENR-G Torex Semiconductor Ltd
2V 4 Terminals Voltage supervisor 1 Channels

Price: 0.0000
RFQ
MXD1816XR22+T Maxim Integrated
3.6V3 Terminals 3-Pin MXD1816 Voltage supervisor1 Channels Min 1V Max 5.5V

Price: 0.0000
RFQ
XC6129C28FNR-G Torex Semiconductor Ltd
2V 4 Terminals Voltage supervisor 1 Channels

Price: 0.0000
RFQ
X5163S8IZ-2.7T1 Renesas Electronics America Inc.
5V 8 Terminals 8-Pin X5163 Voltage supervisor 1 Channels

Price: 0.0000
RFQ
XC6129N39L9R-G Torex Semiconductor Ltd
5V 4 Terminals Voltage supervisor 1 Channels

Price: 0.0000
RFQ
XC6132C16FMR-G Torex Semiconductor Ltd
2V 6 Terminals Voltage supervisor 1 Channels

Price: 0.0000
RFQ