polystyrene polycarbonate encl pdf Datasheet P15 Description --- IC-ON-LINE


	Part Number	Hot Search : OPB716Z SEL6414E F256C SUR543EF NB2870A 2SD16 STRS6401 TB3100L
	Product Description
	Full Text Search

polystyrene polycarbonate encl Datasheet PDF File

For polystyrene polycarbonate encl Found Datasheets File :: 144+ Page :: | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | <15> |

				SAMSUNG SEMICONDUCTOR CO. LTD. Samsung Semiconductor Co., Ltd. http://
Part No.	KM48L16031BT-GLZ_Y_0 KM44L32031BT-GLZ_Y_0 KM416L8031BT-GLZ_Y_0 KM44L32031BT-GLZ/Y/0 KM48L16031BT-GLZ/Y/0 DDRSDRAM1111 KM416L8031BT-GLZ/Y/0 K4H640438A-TLB0 K4H1G0838B-TLA0 K4H1G1638B-TLA0 K4H1G3238B-TLA0 K4H280438B-TLA0 K4H280838B-TLA0 K4H281638B-TLA0 K4H283238B-TLA0 K4H510838B-TLA0 K4H511638B-TLA0 K4H1G1638C-TLA0 K4H1G0838C-TLA0 K4H1G3238C-TLA0 K4H280838C-TLA0 K4H283238B-TLA2 K4H641638A-TLA2 K4H511638A-TLB0 K4H511638A-TCA2 K4H281638A-TLA2 K4H563238B-TCA0 K4H513238B-TLA2 K4H643238B-TLA0 KM44L32031BT-GLZ K4H561638E-TCA0 K4H560838E-TLA2 K4H560438M-TCA0 K4H511638E-TCA2 K4H280838A-TCA0 K4H280838M-TCA0 K4H283238M-TCA2 K4H281638M-TLA0 K4H640838A-TCA0 K4H280838A-TCB0 K4H563238E-TLA0 K4H511638E-TLA0 K4H641638C-TLB0 K4H641638C-TCA2 K4H511638D-TLA2 K4H280838B-TCA2 K4H280838C-TCB0 K4H280438A-TLB0 K4H643238B-TLB0 K4H560838A-TLA2 K4H640838A-TCA2 K4H640838A-TLA2 K4H510838D-TLA2 K4H510438B-TCA0 K4H510438B-TCB0 K4H560438D-TCB0 K4H1G3238C-TCA2 K4H510438C-TCA2 K4H560838C-TCA2 K4H510438E-TCB0 K4H561638E-TCB0 K4H510838E-TCB0 K4H283238E-TCB0 K4H511638E-TCB0 K4H281638E-TCB0 K4H560438B-TCB0 K4H560438B-TLA0 K4H1G0838C-TCB0 K4H510838C-TCB0 838M-TLA2 838M-TLA0 K4H560838E-TCA0 K4H1G0838E-TCA0 K4H1G0838E-TCA2
Description	Dual Wide Bandwidth High Output Drive Single Supply Op Amp With Shutdown 14-PDIP 0 to 70 Enhanced Product 10-Bit Analog-To-Digital Converters W/Serial Control & 11 Analog Inputs 20-SOIC -40 to 125 Dual Wide Bandwidth High Output Drive Single Supply Op Amp 8-SOIC 0 to 70 Quad, Micropower, LinCMOS(TM) Comparator 14-CDIP -55 to 125 Single Wide Bandwidth High Output Drive Single Supply Op Amp 8-PDIP 0 to 70 Quad Wide Bandwidth High Output Drive Single Supply Op Amp 16-SOIC 0 to 70 enclosures; For Use With:PC30/25-1 USA Cardmaster polycarbonate enclosure; Approval Bodies:UL, CSA; External Height:11.4"; External Width:7.5"; Features:Impact Resistant EN 50102; UV Resistant to UL 508 RoHS Compliant: Yes enclosure; For Use With:PC17/16-L3, -3, -LFC3, FC3 Cardmaster polycarbonate enclosure; Approval Bodies:UL, CSA; External Height:5.4"; External Width:5.2"; Features:Impact Resistant EN 50102; UV Resistant to UL 508 Dual Wide Bandwidth High Output Drive Single Supply Op Amp With Shutdown 14-SOIC 0 to 70 128MB DDR SDRAM 8-Bit, 20 kSPS ADC Serial Out, uProcessor Periph./Standalone, Rem. Op w/Ser. Data Link, Mux option 20-SOIC 128MB DDR SDRAM Low Noise Precision Rail-To-Rail Output Operational Amplifier 8-PDIP 0 to 70 128MB DDR SDRAM DIODE ZENER SINGLE 500mW 5.6Vz 0.05mA-Izt 0.05 2uA-Ir 4 SOD-123 3K/REEL 128MB DDR SDRAM 8-Bit, 392 kSPS ADC Parallel Out, Microprocessor Peripheral, On-Chip Track-and-Hold, Single Channels 20-SOIC 128MB DDR SDRAM DIODE ZENER DUAL COMMON-CATHODE 300mW 5.6Vz 5mA-Izt 0.0714 0.1uA-Ir 1 SOT-23 3K/REEL 128MB DDR SDRAM DIODE ZENER SINGLE 200mW 5.6Vz 0.05mA-Izt 0.05 2uA-Ir 4 SOD-323 3K/REEL 128MB DDR SDRAM 8-Bit, 20 kSPS ADC Serial Out, uProcessor Periph./Standalone, Rem. Op w/Ser. Data Link, Mux option 20-PDIP 128MB DDR SDRAM DIODE ZENER DUAL COMMON-CATHODE 300mW 51Vz 5mA-Izt 0.0588 0.1uA-Ir 38 SOT-23 3K/REEL 128MB DDR SDRAM 10-Bit, 38 kSPS ADC Serial Out, On-Chip System Clock, 11 Ch. 20-SOIC 128MB DDR SDRAM 10-Bit, 38 kSPS ADC Serial Out, On-Chip System Clock, 11 Ch. 20-PLCC -40 to 125 128MB DDR SDRAM DDR SDRAM Specification Version 1.0 DDR SDRAM的规范版.0 Dual Wide Bandwidth High Output Drive Single Supply Op Amp With Shutdown 14-PDIP -40 to 125 128MB DDR SDRAM 128Mb DDR SDRAM 128MB DDR SDRAM 8-Bit, 31 kSPS ADC Serial Out, Microprocessor Peripheral/Standalone, Single Channels 8-PDIP 128MB DDR SDRAM 8-Bit, 31 kSPS ADC Serial Out, Microprocessor Peripheral/Standalone, Single Channels 8-SOIC 128MB DDR SDRAM DDR SDRAM Specification Version 1.0 128Mb DDR SDRAM
File Size	683.42K / 53 Page	View it Online	Download Datasheet

				Cypress Semiconductor, Corp. SRAM Cypress Semiconductor Corp. CYPRESS[Cypress Semiconductor]
Part No.	CY62256L CY62256LL CY62256 CY62256LL-55SNE CY62256LL-55SNI CY62256LL-70SNC CY62256-70SNC CY62256LL-70ZRI CY62256-55 CY62256-55PC CY62256-55SNC CY62256-55ZC CY62256-55ZRC CY62256-70 CY62256-70PC CY62256-70SNI CY62256-70ZC CY62256-70ZI CY62256-70ZRC CY62256L-55SNC CY62256L-55ZC CY62256L-55ZRC CY62256L-70PC CY62256L-70SNC CY62256L-70SNI CY62256L-70ZC CY62256L-70ZI CY62256L-70ZRC CY62256LL-55SNC CY62256LL-55ZC CY62256LL-55ZE CY62256LL-55ZI CY62256LL-55ZRC CY62256LL-55ZRE CY62256LL-70PC CY62256LL-70SNI CY62256LL-70ZC CY62256LL-70ZI CY62256LL-70ZRC
Description	256K (32K x 8) Static RAM 32K X 8 STANDARD SRAM, 70 ns, PDSO28 Male insert; Series:Han D; No. of Contacts:64; Gender:Male; Body Material:polycarbonate; Connecting Termination:Crimp; For Use With:Han 64D; Connector Type:Panel Mount Housing RoHS Compliant: Yes 32K X 8 STANDARD SRAM, 55 ns, PDSO28 Single Supply RS232C Line Driver/Receiver(?????μ?o?RS232C ?o?????????¨???2???2??????) 32K X 8 STANDARD SRAM, 70 ns, PDSO28 Single Supply RS232C Line Driver/Receiver(?????μ?o?RS232C ?o?????????¨???2???2??????) 32K X 8 STANDARD SRAM, 55 ns, PDSO28 256K (32K x 8) Static RAM 32K X 8 STANDARD SRAM, 55 ns, PDSO28 POT 5K OHM 9MM VERT NO BUSHING Circular Connector; MIL SPEC:MIL-C-26482, Series I, Solder; Body Material:Aluminum; Series:PT02; Number of Contacts:6; Connector Shell Size:10; Connecting Termination:Solder; Circular Shell Style:Box Mount Receptacle Dual EIA-232 Driver/Receiver 16-PDIP 0 to 70
File Size	391.03K / 12 Page	View it Online	Download Datasheet

				Atmel Corp. http:// Atmel, Corp. ATMEL Corporation
Part No.	AT25160AY1-10YI-2.7 AT25080AY1-10YI-2.7 AT25080A-10PQ-2.7 AT25080A-10PE-2.7 AT25080A-10TQ-2.7 AT25080A-10PI-2.7 AT25080A-10TU-1.8 AT25160AY1-10YI-1.8 AT25320AY1-10YI-1.8 AT25320AY1-10YI-2.7 AT25640AY1-10YI-1.8 AT25640AY1-10YI-2.7 AT25160A-10PE-2.7 AT25320AN-10SU-1.8 AT25320AN-10SU-2.7 AT25080A-10TI-1.8 AT25160A-10TI-1.8 AT25160A-10TI-2.7 AT25320A-10TI-1.8 AT25640A-10TI-1.8 AT25640A-10TI-2.7 AT25640A-10TU-1.8 AT25640AN-10SE-2.7 AT25640A-10TU-2.7 AT25640A-10TQ-2.7 AT25080AN-10SI-1.8 AT25640A-10PE-2.7 AT25320A-10PE-2.7 AT25160AN-10SI-1.8 AT25320A-10PI-1.8 AT25320AN-10SE-2.7 AT25160A-10TU-2.7 AT25640A-10PQ-2.7 AT25640AN-10SU-2.7 AT25640AN-10SU-1.8
Description	CAP 4.7UF 10V 20% TANT SMD-2012-15 TR-7-PL 128 x 64 pixel format, LED Backlight available 240 x 128 pixel format, CFL Backlight with power harness Circular Connector; No. of Contacts:5; Series:; Body Material:Aluminum Alloy; Connecting Termination:Solder; Connector Shell Size:22; Circular Contact Gender:Pin; Circular Shell Style:Straight Plug; Insert Arrangement:22-13 RoHS Compliant: No Circular Connector; No. of Contacts:5; Series:; Body Material:Aluminum Alloy; Connecting Termination:Solder; Connector Shell Size:22; Circular Contact Gender:Socket; Circular Shell Style:Straight Plug; Insert Arrangement:22-13 RoHS Compliant: No Circular Connector; No. of Contacts:19; Series:; Body Material:Aluminum Alloy; Connecting Termination:Solder; Connector Shell Size:22; Circular Contact Gender:Pin; Circular Shell Style:Straight Plug; Insert Arrangement:22-14 RoHS Compliant: No Connector Kit; Contents Of Kit:C14610F0160031 16 position bulkhead housing single latch spring cover, C14610B0161021 16 position female insert wire protect, With spring cover; For Use With:C146 Heavy Duty Industrial Connectors RoHS Compliant: Yes High Speed CMOS Logic Quad 2-Input OR Gates 14-PDIP -55 to 125 DIN Audio Connector; No. of Contacts:8; Contact Termination:Solder; Mounting Type:Panel; Gender:Male; Terminal Type:Solder RoHS Compliant: Yes High Speed CMOS Logic Quad 2-Input OR Gates 14-SOIC -55 to 125 Rectangular Connector Contact Insert; Series:C-146; No. of Contacts:64; Gender:Male; Body Material:polycarbonate; Color:Gray; Connecting Termination:Crimp; For Use With:C146 Rectangular Circular Connectors; Operating Voltage:250V RoHS Compliant: Yes High Speed CMOS Logic 8-Input Multiplexer with 3-State Outputs 16-SOIC -55 to 125 4K X 8 SPI BUS SERIAL EEPROM, PDIP8 DIN Audio Connector; No. of Contacts:7; Contact Termination:Solder; Mounting Type:Panel; Gender:Male; Terminal Type:Solder RoHS Compliant: Yes 4K X 8 SPI BUS SERIAL EEPROM, PDSO8 SPI Serial EEPROMs 2K X 8 SPI BUS SERIAL EEPROM, PDSO8 SPI Serial EEPROMs 8K X 8 SPI BUS SERIAL EEPROM, PDIP8 SPI Serial EEPROMs
File Size	380.29K / 20 Page	View it Online	Download Datasheet

				Jewel Hill Electronic Co., Ltd.
Part No.	GB082BHYBANDA-V01 GB082BHGBANLA-V01 GB082BHGAAMDA-V01 GB082BHGAAMDB-V01 GB082BHGAAMLA-V01 GB082BHGAAMLB-V01 GB082BHGAAMUA-V01 GB082BHGAAMUB-V01 GB082BHGAANDA-V01 GB082BHGAANDB-V01 GB082BHGAANLA-V01 GB082BHGAANLB-V01 GB082BHGAANUA-V01 GB082BHGBBMDB-V01 GB082BHGBBNDB-V01 GB082BHYBBNDB-V01 GB082BHYBBMDB-V01 GB082BHYABNDB-V01 GB082BHYBANDB-V01 GB082BHYABMDB-V01 GB082BHYAANDB-V01 GB082BHYAAMDB-V01 GB082BHGABMDB-V01 GB082BHGABNDB-V01 GB082BHGAANUB-V01 GB082BHGABMDA-V01 GB082BHGABMLB-V01 GB082BHGABMUB-V01 GB082BHGABNDA-V01 GB082BHGABMLA-V01 GB082BHGABMUA-V01 GB082BSYAAMLA-V01 GB082BNGBAMUA-V01 GB082BNYBAMUA-V01 GB082BNYBAMDA-V01 GB082BNYBAMLB-V01 GB082BSGBANDA-V01 GB082BSYABMDB-V01 GB082BNYBBNLA-V01 GB082BNYBBNDA-V01 GB082BSYAAMDA-V01 GB082BSGABNUA-V01 GB082BSGBAMUA-V01 GB082BHGBBMDA-V01 GB082BHYBBMUB-V01 GB082BNGBBNUA-V01 GB082BHYABNUB-V01 GB082BNYABMUB-V01 GB082BHYAANUB-V01 GB082BNYAANUB-V01 GB082BNYAANUA-V01 GB082BNGBANUB-V01 GB082BHYBANUB-V01 GB082BHYAANLB-V01 GB082BNGABNLA-V01 GB082BSYABNUB-V01 GB082BNGABNUA-V01 GB082BNYABMUA-V01 GB082BNGABNLB-V01 GB082BHYABMLA-V01 GB082BNYABMDA-V01 GB082BNYABMLB-V01 GB082BSGABNLA-V01 GB082BSGABNLB-V01 GB082BHYAANLA-V01 GB082BHGABNUB-V01 GB082BNYABML
Description	SWITCH,PB,MINI,SPDT,ON-(ON) SOLDER,120V/1A,1/4"MTNG MOTOR,GEAR,20RPM@12VDC SHFT:.24"Dx.7"L,SOLDER TAB SOCKET,STD DIN,FEMALE,5PIN, PANEL MOUNT PLUG,STD.DIN MALE,6PIN, W/STRAIN RELIEF HEAT GUN,HI/LO TEMP/1000W, UL ACCESSORY FOR GDT-1001A,254925 GDT-1004 TEST LEADS,ONE BLACK,ONE RED FUSE HOLDER,PC FUSE CLIP 5mm DIA FUSE,SIDE LEADS (10) USEHOLDER,PC FUSE CLIP,5mm FRONT/BACK LDS,GM SERIES(10) USEHOLDER,PC FUSE CLIP,3AG .25"DIA,.25"Lx.27"Wx.33"H (10) MOTOR,GEAR,2RPM@24VDC SHT:.24"Dx.7"L,SOLDER TAB PWR CORD,6',AWG18/2,SPT2,BLK PIGTAIL UL/CSA SOCKET,STD DIN,FEMALE,5PIN, RT.ANGLE,PC MOUNT FUSE,GMA FAST ACTING,2A,250V 5mm x 20mm (10) FUSEHOLDER,IN-LINE,20AWGx3/3"L 1.25"x.25"FUSE USE,GMA FAST ACTING,.250A 250V,5mm x 20mm (10) FUSE,GMA FAST ACTING,1A,250V 5mm x 20mm (10) FUSE,GMA FAST ACTING,5A,250V 5mm x 20mm (10) FUSE HOLDER,PANEL MOUNT,SCREW CAP,5x20mm FUSE,SOLDER FUSEHOLDER,PANEL MOUNT,LOW PRO 5x20mm FUSE,SOLDER TERM,UL/CS FUSE,GMA FAST ACTING,3A,250V 5mm x 20mm (10) FUSE,GMA FAST ACTING,.5A 250V,5mm x 20mm (10) MOTOR,GEAR,225RPM,12VDC SHFT:.15"X.57",SOLDER TAB CABLE ASM,RG58/U,15' BNC TO BNC,50 ohm,M-M TOOL,MINI DRILL,STAND IS P/N 26711, SWITCH,TOG,SPST,ON-OF(SMTS101) SOLDER,250V/1.5A,7/32"MTNG. SWITCH,TOG,SUB,SPDT,ON-OFF-ON, SOLDER,250V/1.5A,7/32"MTNG. CASE,ABS SPEEDY,4.875"x2.5"x 1.5" 180/cs HEAT SINK,80486CPU,W TAPE 1.7"L X 1.6"W X 0.4"H CABLE,USB 2.0,A/A,15',CLEAR USB-A MALE TO USB-A FEMALE CABLE,USB 2.0,A/A,6',CLEAR USB-A MALE TO USB-A FEMALE MOTOR,GEAR,42RPM@12VDC SHFT:.16"Dx.6"L,SOLDER TAB CASE,ALUMINUM,7"x6.2"x4.6" 50/cs CASE,ABS SPEEDY,6"x3.5"x1.875" 83/cs MOTOR,GEAR,10rpm@12vdc SHFT:.16"Dx.6"L,SOLDER TAB PWR CORD,6',AWG 18/3,SVT,BEIGE DETACHABLE,UL/CSA CABLE ASSEMBLY,RG58/U,1 FOOT RIGHT ANGLE(2).BNCtoBNC,50ohm SWITCH,TOG,MINI,SPDT,(MTS123) (ON)OFF,SOLDR,125V/6A,1/4"MTNG KNOB,1/4"SHAFT,ROUND,BLK, .55"DIAx.52"H,W/1 SET SCREW SWITCH,TOG,SPST,ON-OFF(MTS101) SOLDER,125V/6A,1/4"MTNG. SWITCH,TOG,FULL,SPST,ON-OFF SOLDER,125V/4A,1/2"MTNG. SOLDER ROLL,ROHS,PB FREE, 1.0mm DIA.,SN96.5/AG3.5,(250g) CASE,PSU BOX,3.35"H X 2.68"W X 2.22" D,NON VENTED ADAPTER,AT,K/B-PS/2 SYS, 1.40",5P DIN FEM-6P MIN DIN M LAMP,#7382,INCANDESCENT T-1-3/4,14.00V,.080A,.300MSCP PWR SPLY,TBL,REG,24VDC/1A,F2 2.1mm X 5.5mm,UL/ROHS LAMP,#86,INCANDESCENT T-1-3/4,6.30V,.200A,.40MSCP(5) SWITCH,TOG,MINI,SPDT(MTS103A2) ON-OFF-ON,PCB,125V/6A,1/4"MTN LAMP,#7387,INCANDESCENT T-1-3/4,2800V,.040A,.300MSCP SWITCH,KEYLOCK,SPST,ROUND MINI 3A,.875"Lx.5"W,BARREL TERM SWITCH,TOG,SPDT,ON-ON(MTS102) SOLDER,125V/6A,1/4"MTNG,ROUND SWITCH,TOG,MINI,SPDT(MTS103) ON-OFF-ON,125V/6A,1/4"MTNG. CASE,ALUMINUM,4.0"x2"x2.8" 250/cs CASE,ALUMINUM,5"x4"x3" 100/cs ADAPTER,PS/2 K/B-AT SYS, 1.40",6P MIN DIN FEM-5P DIN M TERMINAL BLOCK,4 POS,10AMP, METRIC UL,DOUBLE ROW SWITCH,TOG,SPDT,ON-ON,PC Term 120V/5A,1/4"MOUNTING,MTS102 SWITCH,KEYLOCK,SPST,ROUND,TERM KEY#2341,ALL KEYED ALIKE MOTOR,GEAR,44RPM@12VDC SHFT:.24"Dx.7"L,SOLDER TAB MOTOR,GEAR,2RPM@12VDC SHFT:.24"Dx.7"L,SOLDER TAB CASE,INSTRUMENT,7.9"x6.3x2.5 75/cs CASE,INSTRUMENT,10"x7.5"x3.1 40/cs CASE,ABS SPEEDY,7.5"x4.25"x 2.25" 50/cs CASE,FLIPTOP,PLASTIC,8.4"x4.5" x1.4",W/LID 100/cs SLDR ROLL,ROHS,PB FREE,1.0mm DIAMETER,SN99.3/CU0.7,(250g) RELAY,encl,SPDT (953-1C-12DM) 12VDC,20/10 CONT,155ohm COIL MOTOR,GEAR,200RPM,12VDC SHFT:.24"Dx.71"L,SOLDER TABS MODULAR JACK, 4P4C, WIDER 0.18" BODY 规格液晶模块 CABLE,USB 2.0,A/A,15',CLEAR USB-A MALE TO USB-A MALE 规格液晶模块 ED,RED,660NM,T-1,(3MM), 3MCD@20MA,1.8V@10MA,(10) 规格液晶模块 SPECIFICATIONS FOR LCD MODULE 规格液晶模块 MOTOR,GEAR,300RPM,12VDC @ 25MA .23"x.70",FLAT.46",METAL GEAR 规格液晶模块 PWR CORD,14',AWG 18/3,SJT,BLK DETACHABLE,UL/CSA 规格液晶模块 PWR CORD,8',AWG 18/3,SVT,GRY UL/CSA 规格液晶模块 SWITCH,TOG,SUB,SPDT,ON-ON, SOLDER,125V/3A,7/32"MTNG. 规格液晶模块 FUSE,MDL SLOW BLOW,250mA,250V, .25"x1.25" 规格液晶模块 SWITCH,TOG,MINI,DPDT,ON-ON SOLDER,125V/6A,1/4"MTNG. 规格液晶模块 TOOL,DRILL STAND 规格液晶模块 COUPLER,CAT5,MODULAR,IN-LINE, STRAIGHT RJ45,8P8C JACK(F)TO8P 规格液晶模块 SWITCH,PB,MINI,SPDT,ON-(ON) SOLDER,120V/5A,1/4"MTNG. 规格液晶模块 SWITCH,PB,MINI,SPDT,ON-(ON) SOLDER,120V/1A,1/4"MTNG MOTOR,GEAR,44RPM@12VDC SHFT:.24"Dx.7"L,SOLDER TAB MOTOR,GEAR,42RPM@12VDC SHFT:.16"Dx.6"L,SOLDER TAB MOTOR,GEAR,200RPM,12VDC SHFT:.24"Dx.71"L,SOLDER TABS MOTOR,GEAR,150RPM,12VDC SHFT:.24"Dx.71"L MOTOR,GEAR,225RPM,12VDC SHFT:.15"X.57",SOLDER TAB PLUG,BANANA,1/4"SET SCREW, 1 RED/1 BLACK,1 PAIR FUSE,MDL SLOW BLOW,2A,250V, .25"x1.25" CASE,INSTRUMENT,10"x7.5"x3.1 40/cs CASE,ABS SPEEDY,4.875"x2.5"x 1.5" 180/cs CASE,ABS SPEEDY,7.5"x4.25"x 2.25" 50/cs CASE,ALUMINUM,4.0"x2"x2.8" 250/cs
File Size	260.48K / 23 Page	View it Online	Download Datasheet

For polystyrene polycarbonate encl Found Datasheets File :: 144+ Page :: | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | <15> |

▲Up To Search▲

Price and Availability