32-bit microcontroller ic - Allicdata Electronics

Related Categories

< 7 8 9 10 11 >

Allicdata Part#	Mft.Part#	Company	Spec.	QTY.	Pricing(USD)
AD829JNZ-ND	AD829JNZ	Analog Devices Inc.	View more Packaging: Tube Part Status: Active Applications: Voltage Feedback Number of Circuits: 1 -3db Bandwidth: 120MHz Slew Rate: 230 V/s Current - Supply: 5.3mA Current - Output / Channel: 32mA Voltage - Supply, Single/Dual (): 4.5 V ~ 18 V Mounting Type: Through Hole Package / Case: 8-DIP (0.300", 7.62mm) Supplier Device Package: 8-PDIP Base Part Number: AD829	907 Order	1+: $5.9661 50+: $5.1402 100+: $4.4632 500+: $3.8865
LT1252CN8#PBF-N D	LT1252CN8#PBF	Linear Technology/Analog Devices	View more Packaging: Tube Part Status: Active Applications: Current Feedback Number of Circuits: 1 -3db Bandwidth: 282MHz Slew Rate: 125 V/s Current - Supply: 8.5mA Current - Output / Channel: 55mA Voltage - Supply, Single/Dual (): 4 V ~ 28 V, 2 V ~ 14 V Mounting Type: Through Hole Package / Case: 8-DIP (0.300", 7.62mm) Supplier Device Package: 8-PDIP Base Part Number: LT1252	534 Order	1+: $2.0979 25+: $1.3943 100+: $1.1246
MAX4396EUP+TTR- ND	MAX4396EUP+T	Maxim Integrated	View more Packaging: Tape & Reel (TR) Part Status: Active Applications: Voltage Feedback Output Type: Rail-to-Rail Number of Circuits: 4 -3db Bandwidth: 85MHz Slew Rate: 500 V/s Current - Supply: 6mA Current - Output / Channel: 95mA Voltage - Supply, Single/Dual (): 4.5 V ~ 11 V, 2.25 V ~ 5.5 V Mounting Type: Surface Mount Package / Case: 20-TSSOP (0.173", 4.40mm Width) Supplier Device Package: 20-TSSOP Base Part Number: MAX4396	1000 Order	2500+: $1.1382
296-12161-2-ND	BUF04701AIDGSR	Texas Instruments	View more Packaging: Tape & Reel (TR) Part Status: Not For New Designs Applications: TFT-LCD Panels: Gamma Buffer Output Type: Rail-to-Rail Number of Circuits: 4 -3db Bandwidth: 8MHz Slew Rate: 10 V/s Current - Supply: 1.1mA Current - Output / Channel: 32mA Voltage - Supply, Single/Dual (): 3.5 V ~ 12 V, 1.75 V ~ 6 V Mounting Type: Surface Mount Package / Case: 10-TFSOP, 10-MSOP (0.118", 3.00mm Width) Supplier Device Package: 10-VSSOP Base Part Number: BUF04701	1000 Order	--
MAX454CSD-ND	MAX454CSD	Maxim Integrated	View more Packaging: Tube Part Status: Obsolete Applications: 4:1 Multiplexer-Amplifier Number of Circuits: 1 -3db Bandwidth: 50MHz Slew Rate: 300 V/s Current - Supply: 25mA Current - Output / Channel: 20mA Voltage - Supply, Single/Dual (): 4.5 V ~ 5.5 V Mounting Type: Surface Mount Package / Case: 14-SOIC (0.154", 3.90mm Width) Supplier Device Package: 14-SOIC Base Part Number: MAX454	1000 Order	1+: $0
NJM2268V-ND	NJM2268V	NJR Corporation/NJRC	View more Packaging: Tube Part Status: Obsolete Applications: General Purpose Number of Circuits: 2 Current - Supply: 14mA Voltage - Supply, Single/Dual (): 4.85 V ~ 9 V Mounting Type: Surface Mount Package / Case: 8-LSSOP (0.173", 4.40mm Width) Supplier Device Package: 8-SSOP	1000 Order	--
ADA4431-1YCPZ-R L-ND	ADA4431-1YCPZ-R L	Analog Devices Inc.	View more Packaging: Tape & Reel (TR) Part Status: Obsolete Applications: Filter Output Type: Rail-to-Rail Number of Circuits: 1 -3db Bandwidth: 7.9MHz Current - Supply: 4.7mA Voltage - Supply, Single/Dual (): 2.5 V ~ 3.6 V Mounting Type: Surface Mount Package / Case: 16-UFQFN Exposed Pad, CSP Supplier Device Package: 16-LFCSP-UQ (3x3) Base Part Number: ADA4431	1000 Order	1+: $0
BUF07702PWP-ND	BUF07702PWP	Texas Instruments	View more Packaging: Tube Part Status: Obsolete Applications: TFT-LCD Panels: Gamma Buffer, VCOM Driver Output Type: Rail-to-Rail Number of Circuits: 6 -3db Bandwidth: 1MHz Slew Rate: 1 V/s Current - Supply: 2.5mA Voltage - Supply, Single/Dual (): 4.5 V ~ 16 V Mounting Type: Surface Mount Package / Case: 20-PowerTSSOP (0.173", 4.40mm Width) Supplier Device Package: 20-HTSSOP Base Part Number: BUF07702	1000 Order	1+: $0
MAX4027EUD+-ND	MAX4027EUD+	Maxim Integrated	View more Packaging: Tube Part Status: Obsolete Applications: 2:1 Multiplexer-Amplifier Number of Circuits: 3 -3db Bandwidth: 225MHz Slew Rate: 1100 V/s Current - Supply: 31mA Current - Output / Channel: 143mA Voltage - Supply, Single/Dual (): 4.5 V ~ 5.5 V Mounting Type: Surface Mount Package / Case: 14-TSSOP (0.173", 4.40mm Width) Supplier Device Package: 14-TSSOP Base Part Number: MAX4027	1000 Order	1+: $0
MAX450CPD+-ND	MAX450CPD+	Maxim Integrated	View more Packaging: Tube Part Status: Obsolete Applications: Voltage Feedback Number of Circuits: 1 Slew Rate: 100 V/s Current - Supply: 25mA Current - Output / Channel: 15mA Voltage - Supply, Single/Dual (): 10 V ~ 15 V Mounting Type: Through Hole Package / Case: 14-DIP (0.300", 7.62mm) Supplier Device Package: 14-PDIP Base Part Number: MAX450	1000 Order	1+: $0
568-3588-5-ND	TDA6120Q/N2,112	NXP USA Inc	View more Packaging: Tube Part Status: Obsolete Applications: General Purpose Number of Circuits: 1 -3db Bandwidth: 47MHz Slew Rate: 10 V/s Current - Supply: 45mA Current - Output / Channel: 100mA Mounting Type: Through Hole Package / Case: 13-SIP Formed Leads Supplier Device Package: DBS13P Base Part Number: TDA6120Q	1000 Order	1+: $0
LMH6714MAX/NOPB TR-ND	LMH6714MAX/NOPB	Texas Instruments	View more Series: VIP10 Packaging: Tape & Reel (TR) Part Status: Active Applications: Current Feedback Number of Circuits: 1 -3db Bandwidth: 400MHz Slew Rate: 1800 V/s Current - Supply: 5.6mA Current - Output / Channel: 70mA Voltage - Supply, Single/Dual (): 8 V ~ 12.5 V, 4 V ~ 6.25 V Mounting Type: Surface Mount Package / Case: 8-SOIC (0.154", 3.90mm Width) Supplier Device Package: 8-SOIC Base Part Number: LMH6714	63 Order	--
AD813ANZ-ND	AD813ANZ	Analog Devices Inc.	View more Packaging: Tube Part Status: Active Applications: Current Feedback Number of Circuits: 3 -3db Bandwidth: 100MHz Slew Rate: 250 V/s Current - Supply: 4.5mA Current - Output / Channel: 50mA Voltage - Supply, Single/Dual (): 2.4 V ~ 36 V, 1.2 V ~ 18 V Mounting Type: Through Hole Package / Case: 14-DIP (0.300", 7.62mm) Supplier Device Package: 14-PDIP Base Part Number: AD813	2 Order	1+: $7.8309 25+: $6.8998 100+: $6.0793 500+: $5.4079
NJM2268D-ND	NJM2268D	NJR Corporation/NJRC	View more Packaging: Tube Part Status: Active Applications: General Purpose Number of Circuits: 2 Current - Supply: 14mA Voltage - Supply, Single/Dual (): 4.85 V ~ 9 V Mounting Type: Through Hole Package / Case: 8-DIP (0.300", 7.62mm) Supplier Device Package: 8-DIP	1000 Order	2000+: $0.3429
LT6558CDHC#PBF- ND	LT6558CDHC#PBF	Linear Technology/Analog Devices	View more Packaging: Tube Part Status: Active Applications: General Purpose Number of Circuits: 3 -3db Bandwidth: 550MHz Slew Rate: 2200 V/s Current - Supply: 22.5mA Current - Output / Channel: 90mA Voltage - Supply, Single/Dual (): 3 V ~ 7.5 V, 2.5 V ~ 3.3 V Mounting Type: Surface Mount Package / Case: 16-WFDFN Exposed Pad Supplier Device Package: 16-DFN (5x3) Base Part Number: LT6558	1000 Order	292+: $1.8892
AD8146ACPZ-RL-N D	AD8146ACPZ-RL	Analog Devices Inc.	View more Packaging: Tape & Reel (TR) Part Status: Active Applications: Differential Output Type: Differential Number of Circuits: 3 -3db Bandwidth: 900MHz Slew Rate: 3000 V/s Current - Supply: 57mA Current - Output / Channel: 87mA Voltage - Supply, Single/Dual (): 4.5 V ~ 11 V, 2.25 V ~ 5.5 V Mounting Type: Surface Mount Package / Case: 24-WFQFN Exposed Pad, CSP Supplier Device Package: 24-LFCSP-WQ (4x4) Base Part Number: AD8146	1000 Order	5000+: $2.2995
ZXFV203N14TC-ND	ZXFV203N14TC	Diodes Incorporated	View more Packaging: Tape & Reel (TR) Part Status: Obsolete Applications: Current Feedback Output Type: Single-Ended Number of Circuits: 3 -3db Bandwidth: 210MHz Slew Rate: 600 V/s Current - Supply: 7.5mA Current - Output / Channel: 40mA Voltage - Supply, Single/Dual (): 4.75 V ~ 5.25 V Mounting Type: Surface Mount Package / Case: 14-SOIC (0.154", 3.90mm Width) Supplier Device Package: 14-SO Base Part Number: ZXFV203	1000 Order	1+: $0
EL4332CSZ-T7TR- ND	EL4332CSZ-T7	Intersil	View more Packaging: Tape & Reel (TR) Part Status: Obsolete Applications: 2:1 Multiplexer-Amplifier Number of Circuits: 3 -3db Bandwidth: 300MHz Slew Rate: 650 V/s Current - Supply: 48mA Current - Output / Channel: 40mA Mounting Type: Surface Mount Package / Case: 16-SOIC (0.154", 3.90mm Width) Supplier Device Package: 16-SOIC Base Part Number: EL4332	1000 Order	1+: $0
EL9200IL-T13-ND	EL9200IL-T13	Intersil	View more Packaging: Tape & Reel (TR) Part Status: Obsolete Applications: TFT-LCD Panels: VCOM Driver Output Type: Rail-to-Rail Number of Circuits: 1 -3db Bandwidth: 44MHz Slew Rate: 80 V/s Current - Supply: 3.8mA Current - Output / Channel: 65mA Voltage - Supply, Single/Dual (): 4.5 V ~ 16.5 V, 2.25 V ~ 8.25 V Mounting Type: Surface Mount Package / Case: 12-VFDFN Exposed Pad Supplier Device Package: 12-DFN (4x4) Base Part Number: EL9200	1000 Order	1+: $0
EL9202IL-ND	EL9202IL	Intersil	View more Packaging: Tube Part Status: Obsolete Applications: TFT-LCD Panels: VCOM Driver Output Type: Rail-to-Rail Number of Circuits: 4 -3db Bandwidth: 44MHz Slew Rate: 80 V/s Current - Supply: 10.5mA Current - Output / Channel: 65mA Voltage - Supply, Single/Dual (): 4.5 V ~ 16.5 V, 2.25 V ~ 8.25 V Mounting Type: Surface Mount Package / Case: 24-VFQFN Exposed Pad Supplier Device Package: 24-QFN (5x4) Base Part Number: EL9202	1000 Order	1+: $0
HA5023IP-ND	HA5023IP	Intersil	View more Packaging: Tube Part Status: Obsolete Applications: Current Feedback Number of Circuits: 2 -3db Bandwidth: 125MHz Slew Rate: 350 V/s Current - Supply: 7.5mA Current - Output / Channel: 20mA Voltage - Supply, Single/Dual (): 4.75 V ~ 18 V Mounting Type: Through Hole Package / Case: 8-DIP (0.300", 7.62mm) Supplier Device Package: 8-PDIP Base Part Number: HA5023	1000 Order	1+: $0
MAX4024EUD+-ND	MAX4024EUD+	Maxim Integrated	View more Packaging: Tube Part Status: Discontinued at Digi-Key Applications: 2:1 Multiplexer-Amplifier Number of Circuits: 3 -3db Bandwidth: 200MHz Slew Rate: 360 V/s Current - Supply: 25mA Voltage - Supply, Single/Dual (): 4.5 V ~ 11 V, 2.25 V ~ 5.5 V Mounting Type: Surface Mount Package / Case: 14-TSSOP (0.173", 4.40mm Width) Supplier Device Package: 14-TSSOP Base Part Number: MAX4024	1000 Order	1+: $0
MHW8188AN-ND	MHW8188AN	NXP USA Inc	View more Packaging: Tray Part Status: Obsolete Applications: CATV Number of Circuits: 1 Current - Supply: 425mA Mounting Type: Surface Mount Package / Case: Module Supplier Device Package: 7-CATV Module Base Part Number: MHW8188	1000 Order	1+: $0
MHW9267AN-ND	MHW9267AN	NXP USA Inc	View more Packaging: Tray Part Status: Obsolete Applications: CATV Number of Circuits: 1 Current - Supply: 440mA Mounting Type: Surface Mount Package / Case: Module Supplier Device Package: 7-CATV Module Base Part Number: MHW9267	1000 Order	1+: $0
296-39228-2-ND	THS7347IPHPR	Texas Instruments	View more Packaging: Tape & Reel (TR) Part Status: Active Applications: Buffer Output Type: Rail-to-Rail Number of Circuits: 3 -3db Bandwidth: 550MHz Slew Rate: 1200 V/s Current - Supply: 90mA Current - Output / Channel: 110mA Voltage - Supply, Single/Dual (): 2.7 V ~ 5.5 V Mounting Type: Surface Mount Package / Case: 48-TQFP Exposed Pad Supplier Device Package: 48-HTQFP (7x7) Base Part Number: THS7347	1000 Order	--
296-24163-ND	THS7327PHP	Texas Instruments	View more Packaging: Tray Part Status: Active Applications: Buffer Output Type: Rail-to-Rail Number of Circuits: 3 -3db Bandwidth: 500MHz Slew Rate: 1150 V/s Current - Supply: 118mA Current - Output / Channel: 115mA Voltage - Supply, Single/Dual (): 2.7 V ~ 5.5 V Mounting Type: Surface Mount Package / Case: 48-TQFP Exposed Pad Supplier Device Package: 48-HTQFP (7x7) Base Part Number: THS7327	15 Order	--
BUF05704AIPWPR- ND	BUF05704AIPWPR	Texas Instruments	View more Packaging: Tape & Reel (TR) Part Status: Not For New Designs Applications: TFT-LCD Panels: Gamma Buffer, VCOM Driver Output Type: Rail-to-Rail Number of Circuits: 4 -3db Bandwidth: 1MHz Slew Rate: 1.6 V/s Current - Supply: 5mA Voltage - Supply, Single/Dual (): 4.5 V ~ 18 V Mounting Type: Surface Mount Package / Case: 14-TSSOP (0.173", 4.40mm Width) Exposed Pad Supplier Device Package: 14-HTSSOP Base Part Number: BUF05704	1000 Order	--
LT6205CS5#TRPBF -ND	LT6205CS5#TRPBF	Linear Technology/Analog Devices	View more Packaging: Tape & Reel (TR) Part Status: Active Applications: Voltage Feedback Output Type: Rail-to-Rail Number of Circuits: 1 Slew Rate: 600 V/s Current - Supply: 4mA Current - Output / Channel: 60mA Voltage - Supply, Single/Dual (): 2.7 V ~ 12.6 V, 1.35 V ~ 6.3 V Mounting Type: Surface Mount Package / Case: SOT-23-5 Thin, TSOT-23-5 Supplier Device Package: TSOT-23-5 Base Part Number: LT6205	1000 Order	--
LT6558IGN#TRPBF -ND	LT6558IGN#TRPBF	Linear Technology/Analog Devices	View more Packaging: Tape & Reel (TR) Part Status: Active Applications: General Purpose Number of Circuits: 3 -3db Bandwidth: 550MHz Slew Rate: 2200 V/s Current - Supply: 22.5mA Current - Output / Channel: 90mA Voltage - Supply, Single/Dual (): 3 V ~ 7.5 V, 2.5 V ~ 3.3 V Mounting Type: Surface Mount Package / Case: 16-SSOP (0.154", 3.90mm Width) Supplier Device Package: 16-SSOP Base Part Number: LT6558	1000 Order	2500+: $2.3326
AD813ARZ-14-REE LTR-ND	AD813ARZ-14-REE L	Analog Devices Inc.	View more Packaging: Tape & Reel (TR) Part Status: Active Applications: Current Feedback Number of Circuits: 3 -3db Bandwidth: 100MHz Slew Rate: 250 V/s Current - Supply: 4.5mA Current - Output / Channel: 50mA Voltage - Supply, Single/Dual (): 2.4 V ~ 36 V, 1.2 V ~ 18 V Mounting Type: Surface Mount Package / Case: 14-SOIC (0.154", 3.90mm Width) Supplier Device Package: 14-SOIC Base Part Number: AD813	1000 Order	--
SN10502DGNRG4-N D	SN10502DGNRG4	Texas Instruments	View more Packaging: Tape & Reel (TR) Part Status: Obsolete Applications: Voltage Feedback Output Type: Rail-to-Rail Number of Circuits: 2 -3db Bandwidth: 170MHz Slew Rate: 900 V/s Current - Supply: 14mA Current - Output / Channel: 100mA Voltage - Supply, Single/Dual (): 2.7 V ~ 16 V, 1.35 V ~ 8 V Mounting Type: Surface Mount Package / Case: 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) Exposed Pad Supplier Device Package: 8-MSOP-PowerPad Base Part Number: SN10502	1000 Order	1+: $0
MAX4259EEE+-ND	MAX4259EEE+	Maxim Integrated	View more Packaging: Tube Part Status: Obsolete Applications: 2:1 Multiplexer-Amplifier Number of Circuits: 1 -3db Bandwidth: 250MHz Slew Rate: 1000 V/s Current - Supply: 10.9mA Current - Output / Channel: 100mA Voltage - Supply, Single/Dual (): 4.5 V ~ 5.5 V Mounting Type: Surface Mount Package / Case: 16-SSOP (0.154", 3.90mm Width) Supplier Device Package: 16-QSOP Base Part Number: MAX4259	1000 Order	1+: $0
MAX4027EUD+T-ND	MAX4027EUD+T	Maxim Integrated	View more Packaging: Tape & Reel (TR) Part Status: Obsolete Applications: 2:1 Multiplexer-Amplifier Number of Circuits: 3 -3db Bandwidth: 225MHz Slew Rate: 1100 V/s Current - Supply: 31mA Current - Output / Channel: 143mA Voltage - Supply, Single/Dual (): 4.5 V ~ 5.5 V Mounting Type: Surface Mount Package / Case: 14-TSSOP (0.173", 4.40mm Width) Supplier Device Package: 14-TSSOP Base Part Number: MAX4027	1000 Order	1+: $0
MHW9188N-ND	MHW9188N	NXP USA Inc	View more Packaging: Tray Part Status: Obsolete Applications: CATV Number of Circuits: 1 Current - Supply: 425mA Mounting Type: Surface Mount Package / Case: Module Supplier Device Package: 7-CATV Module Base Part Number: MHW9188	1000 Order	1+: $0
LMH6739MQ/NOPB- ND	LMH6739MQ/NOPB	Texas Instruments	View more Packaging: Tube Part Status: Active Applications: Buffer Number of Circuits: 3 -3db Bandwidth: 750MHz Slew Rate: 3300 V/s Current - Supply: 32mA Current - Output / Channel: 90mA Voltage - Supply, Single/Dual (): 8 V ~ 12 V, 4 V ~ 6 V Mounting Type: Surface Mount Package / Case: 16-SSOP (0.154", 3.90mm Width) Supplier Device Package: 16-SSOP Base Part Number: LMH6739	621 Order	--
MAX4312EEE+-ND	MAX4312EEE+	Maxim Integrated	View more Packaging: Tube Part Status: Active Applications: 8:1 Multiplexer-Amplifier Output Type: Rail-to-Rail Number of Circuits: 1 -3db Bandwidth: 265MHz Slew Rate: 345 V/s Current - Supply: 7.4mA Current - Output / Channel: 95mA Voltage - Supply, Single/Dual (): 4 V ~ 10.5 V, 2 V ~ 5.25 V Mounting Type: Surface Mount Package / Case: 16-SSOP (0.154", 3.90mm Width) Supplier Device Package: 16-QSOP Base Part Number: MAX4312	235 Order	--
AD8075ARUZ-REEL 7TR-ND	AD8075ARUZ-REEL 7	Analog Devices Inc.	View more Packaging: Tape & Reel (TR) Part Status: Active Applications: Buffer Number of Circuits: 3 -3db Bandwidth: 550MHz Slew Rate: 1350 V/s Current - Supply: 24mA Current - Output / Channel: 70mA Voltage - Supply, Single/Dual (): 9 V ~ 11 V, 4.5 V ~ 5.5 V Mounting Type: Surface Mount Package / Case: 16-TSSOP (0.173", 4.40mm Width) Supplier Device Package: 16-TSSOP Base Part Number: AD8075	1000 Order	--
296-30070-2-ND	BUF20800ATDCPRQ 1	Texas Instruments	View more Series: Automotive, AEC-Q100 Packaging: Tape & Reel (TR) Part Status: Active Applications: TFT-LCD Panels: Gamma Buffer, VCOM Driver Output Type: Rail-to-Rail Number of Circuits: 18 Current - Supply: 18mA Current - Output / Channel: 45mA Voltage - Supply, Single/Dual (): 7 V ~ 18 V Mounting Type: Surface Mount Package / Case: 38-TFSOP (0.173", 4.40mm Width) Exposed Pad Supplier Device Package: 38-HTSSOP Base Part Number: BUF20800	1000 Order	2000+: $2.5086
296-19327-5-ND	THS7313PW	Texas Instruments	View more Packaging: Tube Part Status: Active Applications: 2:1 Multiplexer-Amplifier Output Type: Rail-to-Rail Number of Circuits: 3 -3db Bandwidth: 8MHz Current - Supply: 18.9mA Current - Output / Channel: 85mA Voltage - Supply, Single/Dual (): 2.6 V ~ 5.5 V Mounting Type: Surface Mount Package / Case: 20-TSSOP (0.173", 4.40mm Width) Supplier Device Package: 20-TSSOP Base Part Number: THS7313	70 Order	--
LT1194CS8#TRPBF -ND	LT1194CS8#TRPBF	Linear Technology/Analog Devices	View more Packaging: Tape & Reel (TR) Part Status: Active Applications: Differential Number of Circuits: 1 -3db Bandwidth: 35MHz Slew Rate: 500 V/s Current - Supply: 35mA Current - Output / Channel: 50mA Voltage - Supply, Single/Dual (): 4.75 V ~ 16 V, 2.38 V ~ 8 V Mounting Type: Surface Mount Package / Case: 8-SOIC (0.154", 3.90mm Width) Supplier Device Package: 8-SOIC Base Part Number: LT1194	1000 Order	2500+: $2.2812

< 7 8 9 10 11 >

Hot Searches: 32-bit microcontroller ic embedded 32-bit microcontroller ic 32-bit microcontroller 32-bit 10-core microcontroller 32-bit 12-core microcontroller 32-bit 16-core microcontroller embedded 32-bit microcontroller 32 bit counter ic fpga 32-bit arm9 fpga 32-bit arm9. 4-bit microcontroller 8-bit microcontroller 8-bit microcontroller ic 16-bit microcontroller ic ic counter chip 32 bit 32-bit codec ic 32-bit bus ic 16-bit dual-core microcontroller 8-bit embedded microcontroller ic embedded 8-bit microcontroller ic

Search Result:32-bit microcontroller ic

Related Categories