IC芯片MAX663品牌、價(jià)格、PDF參數(shù)

newark • ecia (neda) member • authorized distributor
元器件型號 廠商 描述 newark # 數(shù)量 價(jià)格
max663cpa+ maxim integrated products ic, dual mode reg, 5v/1.2v to 16v 8-dip, each 03m8949 103
1-24 : $3.41
25-99 : $2.71
100-499 : $2.3
500 or more : $2.03
max6633msa+ maxim integrated products ic, temp sensor, 12bit, 1c, 8-soic, each 53k7198 7
1-24 : $3.46
25-99 : $2.67
100-499 : $2.48
500 or more : $2.21
max663csa+ maxim integrated products ic, dual mode reg, 5v/1.2v to 16v n8-soic, each 67k6229 66
1-24 : $5.25
25-99 : $3.5
100-499 : $2.53
500 or more : $2.24
max6639aee+ maxim integrated products ic, temp monitor, 11bit, 1c, qsop-16, each 28m1782 132
1-24 : $4.2
25-49 : $3.24
50-99 : $3.24
100 or more : $2.52
digi-key • ecia (neda) member • authorized distributor
元器件型號 廠商 描述 digi-key # 數(shù)量 價(jià)格
max663cpa+ maxim integrated products ic cmos dual mode 5v/adj 8-dip max663cpa+-nd 715
tube
1 : $4.77
25 : $3.18
100 : $2.30
500 : $2.0471
max663csa maxim integrated products ic cmos dual mode 5v/adj 8soic max663csa-nd 0
2500 : $2.2531
max663csa+ maxim integrated products ic cmos dual mode 5v/adj 8soic max663csa+-nd 204
tube
1 : $5.25
25 : $3.50
100 : $2.53
500 : $2.2531
max663csa+t maxim integrated products ic reg volt prog 5v/adj 8-soic max663csa+t-nd 0
2500 : $2.3432
max663epa maxim integrated products ic cmos dual mode 5v/adj 8-dip max663epa-nd 0
2500 : $3.0771
max663epa+ maxim integrated products ic reg volt prog 5v/adj 8-dip max663epa+-nd 50
tube
1 : $7.17
25 : $4.78
100 : $3.46
500 : $3.0771
max663esa+ maxim integrated products ic reg volt prog 5v/adj 8-soic max663esa+-nd 1755
tube
1 : $7.80
25 : $5.20
100 : $3.77
500 : $3.3475
max663esa+t maxim integrated products ic reg volt prog 5v/adj 8-soic max663esa+t-nd 0
2500 : $3.4376
max6630mtt+t maxim integrated products ic temp sensor dgtl 6-tdfn max6630mtt+ttr-nd 2500
tape & reel
2500 : $2.4076
max6635msa+t maxim integrated products ic temp sensor smbus 8-soic max6635msa+t-nd 0
2500 : $2.472
max6630mtt+t maxim integrated products ic temp sensor dgtl 6-tdfn max6630mtt+tdkr-nd 0
1 : $5.05
25 : $3.8148
100 : $3.338
500 : $3.0518
1000 : $2.7657
see more
max6630mtt+t maxim integrated products ic temp sensor dgtl 6-tdfn max6630mtt+tct-nd 2402
cut tape
1 : $5.05
25 : $3.8148
100 : $3.338
500 : $3.0518
1000 : $2.7657
see more
max6630mut#tg16 maxim integrated products ic temp sensor dig sot23-6 max6630mut#tg16-nd 2049
tube
1 : $2.41
max6631mtt+t maxim integrated products ic temp sensor dgtl 6-tdfn max6631mtt+tct-nd 518
cut tape
1 : $5.43
25 : $4.1004
100 : $3.5879
500 : $3.2803
1000 : $2.9728
see more
max6631mtt+t maxim integrated products ic temp sensor dgtl 6-tdfn max6631mtt+tdkr-nd 0
1 : $5.43
25 : $4.1004
100 : $3.5879
500 : $3.2803
1000 : $2.9728
see more
max6639ate+t maxim integrated products ic temp monitor 2ch 16-tqfn max6639ate+t-nd 0
2500 : $2.7939
max6631mtt+t maxim integrated products ic temp sensor dgtl 6-tdfn max6631mtt+ttr-nd 2500
tape & reel
2500 : $2.5879
max6632mtt+t maxim integrated products ic temp sensor dgtl 6-tdfn max6632mtt+t-nd 0
2500 : $2.5879
max6633msa+ maxim integrated products ic temp sensor smbus 8-soic max6633msa+-nd 5375
tube
1 : $5.19
25 : $3.46
100 : $2.50
500 : $2.2274
max6633msa+t maxim integrated products ic temp sensor smbus 8-soic max6633msa+t-nd 0
2500 : $2.3175
max6634msa+ maxim integrated products ic temp sensor smbus 8-soic max6634msa+-nd 111
tube
1 : $5.37
25 : $3.58
100 : $2.59
500 : $2.3046
max6634msa+t maxim integrated products ic temp sensor smbus 8-soic max6634msa+t-nd 0
2500 : $2.3948
max6635evkit+ maxim integrated products evaluation kit for max6635 max6635evkit+-nd 0
2 : $108.53
max6635msa+ maxim integrated products ic temp sensor smbus 8-soic max6635msa+-nd 767
tube
1 : $5.55
25 : $3.70
100 : $2.68
500 : $2.3819
max6636up9a+ maxim integrated products ic prec temp monitor 7ch 20tssop max6636up9a+-nd 63
tube
1 : $11.58
25 : $7.72
100 : $5.59
500 : $4.9698
max6636up9a+t maxim integrated products ic prec temp monitor 7ch 20tssop max6636up9a+t-nd 0
2500 : $5.0599
max6639aee+ maxim integrated products ic temp monitor 2ch 16-qsop max6639aee+-nd 94
tube
1 : $6.30
25 : $4.20
100 : $3.04
500 : $2.7038
max6639aee+t maxim integrated products ic temp monitor 2ch 16-qsop max6639aee+ttr-nd 15000
tape & reel
2500 : $2.7939
max6639aee+t maxim integrated products ic temp monitor 2ch 16-qsop max6639aee+tct-nd 17498
cut tape
1 : $5.87
25 : $4.4268
100 : $3.8735
500 : $3.5414
1000 : $3.2094
see more
max6639aee+t maxim integrated products ic temp monitor 2ch 16-qsop max6639aee+tdkr-nd 17498
digi-reel®
1 : $5.87
25 : $4.4268
100 : $3.8735
500 : $3.5414
1000 : $3.2094
see more
max6639ate+ maxim integrated products ic temp monitor 2ch 16-tqfn max6639ate+-nd 60
tube
1 : $6.30
25 : $4.20
100 : $3.04
500 : $2.7038
max6639evkit+ maxim integrated products evaluation kit for max6639/f max6639evkit+-nd 0
2 : $108.53
max6639faee+ maxim integrated products ic 2ch temp monitor 16-qsop max6639faee+-nd 613
tube
1 : $6.60
25 : $4.40
100 : $3.19
500 : $2.8325
max6639faee+t maxim integrated products ic 2ch temp monitor 16-qsop max6639faee+t-nd 0
2500 : $2.9226
max6639fate+ maxim integrated products ic 2ch temp monitor 16tqfn max6639fate+-nd 0
60 : $4.40
max6639fate+t maxim integrated products ic temp sensor pwm ctlr 16tqfn max6639fate+t-nd 0
2500 : $2.9226
max6639yaee+ maxim integrated products ic temp monitor 2ch 16-qsop max6639yaee+-nd 0
100 : $3.04
max6639yaee+t maxim integrated products ic temp monitor 2ch 16-qsop max6639yaee+t-nd 0
2500 : $2.7939
max663cpa maxim integrated products ic cmos dual mode 5v/adj 8-dip max663cpa-nd 0
2500 : $2.0471
farnell • ecia (neda) member • authorized distributor
元器件型號 廠商 描述 farnell # 數(shù)量 asia 數(shù)量 europe 價(jià)格 (gbp)
max663csa+ maxim integrated products v reg adj +2/16.5v, smd, soic8, 663 1188015 14 527
1 : £4.85
10 : £3.12
100 : £2.58
250 : £1.9
max663esa+ maxim integrated products ic, v reg, 5v, programmable, nsoic8 1379750 9 19
1 : £6.37
25 : £3.88
100 : £2.68
250 : £2.26
element14 - asia pacific • authorized distributor
元器件型號 廠商 描述 封裝14 # 數(shù)量 asia 價(jià)格 (usd)
max663csa+ maxim integrated products v reg adj +2/16.5v, smd, soic8, 663 1188015 449
1 : $6.05
25 : $4.04
max663esa+ maxim integrated products ic, v reg, 5v, programmable, nsoic8 1379750 28
1 : $8.99
25 : $5.99
avnet express • ecia (neda) member • authorized distributor
元器件型號 廠商 描述 avnet # 數(shù)量 價(jià)格
max6639ate+t maxim integrated products temp sensor dgtl 2-wire/i2c - tape and reel max6639ate+t 3 wks factory lead time
2500 : $2.78
max663esa maxim integrated products cmos +5v/adjustable micropower positive volta - bulk max663esa 32 wks factory lead time
2500 : $3.36
max663esa-t maxim integrated products cmos +5v/adjustable micropower positive volta - tape and reel max663esa-t 32 wks factory lead time
2500 : $3.49
max663cja maxim integrated products cmos +5v/adjustable micropower positive volta - bulk max663cja call for delivery
requires quote
max6632mut-t maxim integrated products 12-bit + sign digital temperature sensors wit - tape and reel max6632mut-t 15 wks factory lead time
5000 : $2.63
max6630mut maxim integrated products 12-bit + sign digital temperature sensors wit - rail/tube max6630mut call for delivery
requires quote
max6634msa+t maxim integrated products temp sensor dgtl 3-wire/i2c 8soic - tape and reel max6634msa+t 3 wks factory lead time
2500 : $2.38
max6635msa+t maxim integrated products temp sensor dgtl 3-wire/i2c 8soic - tape and reel max6635msa+t 3 wks factory lead time
2500 : $2.46
max6639ate maxim integrated products 2-channel temperature monitor w dual, automat - rail/tube max6639ate 13 wks factory lead time
requires quote
max6639ate-t maxim integrated products 2-channel temperature monitor w dual, automat - tape and reel max6639ate-t call for delivery
requires quote
max663esa+t maxim integrated products ldo reg 1.3v to 16v/5v 0.04a 8soic n - tape and reel max663esa+t 3 wks factory lead time
2500 : $3.42
max6632mtt+t maxim integrated products temp sensor dgtl 3-wire/spi 6tdfn ep - tape and reel max6632mtt+t 1 wks factory lead time
2500 : $2.58
max663epa+ maxim integrated products ldo reg 1.3v to 16v/5v 0.04a 8pdip n - rail/tube max663epa+ 3 wks factory lead time
42 : $4.88
50 : $3.53
100 : $3.25
500 : $3.09
max663cpa+ maxim integrated products ldo reg 1.3v to 16v/5v 0.04a 8pdip n - rail/tube max663cpa+ 316 in stock
1 : $4.54
25 : $3.18
50 : $2.30
100 : $2.12
500 : $2.01
see more
max663mja maxim integrated products cmos +5v/adjustable micropower positive volta - bulk max663mja call for delivery
requires quote
max6635msa maxim integrated products 12-bit + sign temperature sensors with smbus/ - bulk max6635msa call for delivery
requires quote
max6635msa-t maxim integrated products 12-bit + sign temperature sensors with smbus/ - tape and reel max6635msa-t call for delivery
requires quote
max6633msa+t maxim integrated products temp sensor dgtl 3-wire/i2c 8soic - tape and reel max6633msa+t 3 wks factory lead time
2500 : $2.31
max663csa+t maxim integrated products ldo reg 1.3v to 16v/5v 0.04a 8soic n - tape and reel max663csa+t 3 wks factory lead time
2500 : $2.33
max6633msa+ maxim integrated products temp sensor dgtl 3-wire/i2c 8soic - rail/tube max6633msa+ 3 wks factory lead time
1 : $4.94
25 : $3.46
50 : $2.51
100 : $2.31
500 : $2.19
see more
max6630mtt+ maxim integrated products temp sensor dgtl 3-wire/spi 6tdfn ep - rail/tube max6630mtt+ call for delivery
requires quote
max6634msa+ maxim integrated products temp sensor dgtl 3-wire/i2c 8soic - bulk max6634msa+ 233 in stock
1 : $5.11
25 : $3.58
50 : $2.59
100 : $2.39
500 : $2.27
see more
max663mja/hr maxim integrated products ldo reg 1.3v to 16v/5v 0.04a 8cdip n - bulk max663mja/hr call for delivery
requires quote
max6634msa maxim integrated products 12-bit + sign temperature sensors with smbus/ - bulk max6634msa 1 wks factory lead time
5000 : $2.31
max6630mut-t maxim integrated products 12-bit + sign digital temperature sensors wit - tape and reel max6630mut-t 15 wks factory lead time
requires quote
max663esa+ maxim integrated products ldo reg 1.3v to 16v/5v 0.04a 8soic n - rail/tube max663esa+ 20 in stock
1 : $7.43
25 : $5.20
50 : $3.77
100 : $3.47
500 : $3.29
see more
max6639yaee+ maxim integrated products temp monitor 16qsop - rail/tube max6639yaee+ call for delivery
1 : $6.00
25 : $4.20
50 : $3.04
100 : $2.80
500 : $2.66
see more
max6638ate-t maxim integrated products temperature monitor with dual serial interfac - tape and reel max6638ate-t call for delivery
requires quote
max6630mtt+t maxim integrated products temp sensor dgtl 3-wire/spi 6tdfn ep - tape and reel max6630mtt+t 3 wks factory lead time
2500 : $2.40
max6639aee-t maxim integrated products 2-channel temperature monitor w dual, automat - tape and reel max6639aee-t call for delivery
requires quote
max6638ate maxim integrated products temperature monitor with dual serial interfac - rail/tube max6638ate call for delivery
requires quote
max6632mtt+ maxim integrated products temp sensor dgtl 3-wire/spi 6tdfn ep - rail/tube max6632mtt+ call for delivery
requires quote
max663csa+ maxim integrated products ldo reg 1.3v to 16v/5v 0.04a 8soic n - rail/tube max663csa+ 23 in stock
1 : $5.00
25 : $3.50
50 : $2.54
100 : $2.33
500 : $2.22
see more
max663mja/883b maxim integrated products ldo reg 1.3v to 16v/5v 0.04a 8cdip n - bulk max663mja/883b call for delivery
requires quote
max663cpa maxim integrated products cmos +5v/adjustable micropower positive volta - bulk max663cpa 32 wks factory lead time
2500 : $2.05
max6631mtt+t maxim integrated products temp sensor dgtl 3-wire/spi 6tdfn ep - tape and reel max6631mtt+t 1 wks factory lead time
2500 : $2.58
max6639aee+t maxim integrated products temp sensor dgtl 2-wire/i2c 16qsop - tape and reel max6639aee+t 3 wks factory lead time
2500 : $2.78
max6639aee+ maxim integrated products temp sensor dgtl 2-wire/i2c 16qsop - rail/tube max6639aee+ 4810 in stock
1 : $6.00
25 : $4.20
50 : $3.04
100 : $2.80
500 : $2.66
see more
max6636up9a+ maxim integrated products temp sensor dgtl 2-wire 10pin umax - rail/tube max6636up9a+ 1 wks factory lead time
1 : $11.03
25 : $7.72
50 : $5.59
100 : $5.15
500 : $4.89
see more
max6639ate+ maxim integrated products temp sensor dgtl 2-wire/i2c - rail/tube max6639ate+ 120 in stock
1 : $6.00
25 : $4.20
50 : $3.04
100 : $2.80
500 : $2.66
see more
max6636up9a+t maxim integrated products temp sensor dgtl 2-wire 10pin umax - tape and reel max6636up9a+t 1 wks factory lead time
2500 : $5.04
max6639faee+ maxim integrated products temp sensor dgtl 2-wire/i2c - rail/tube max6639faee+ 57 in stock
1 : $6.29
25 : $4.40
50 : $3.19
100 : $2.93
500 : $2.78
see more
max663csa maxim integrated products cmos +5v/adjustable micropower positive volta - bulk max663csa 7 wks factory lead time
2500 : $2.26
max6639faee+t maxim integrated products temp sensor dgtl 2-wire/i2c 16qsop - tape and reel max6639faee+t 3 wks factory lead time
2500 : $2.91
max6639fate+ maxim integrated products 2-channel temperature monitor w dua - rail/tube max6639fate+ 1 wks factory lead time
114 : $2.93
500 : $2.78
max663cja rochester electronics max663cja 1 wks factory lead time
285 : $1.26
max6633msa rochester electronics max6633msa 1 wks factory lead time
115 : $3.13
max6635evkit+ maxim integrated products 12-bit + sign temperature sensors w - boxed product (development kits) max6635evkit+ call for delivery
requires quote
max6639evkit+ maxim integrated products 2-channel temperature monitor w dua - boxed product (development kits) max6639evkit+ call for delivery
requires quote
max6639fate+t maxim integrated products 2-channel temperature monitor w dua - tape and reel max6639fate+t call for delivery
2500 : $2.91
max6639aee rochester electronics max6639aee 1 wks factory lead time
285 : $1.26
max6634msa rochester electronics max6634msa 1 wks factory lead time
103 : $3.49
max663eja rochester electronics max663eja 1 wks factory lead time
285 : $1.26
max6639ate rochester electronics max6639ate 1 wks factory lead time
95 : $4.42
100 : $3.79
max6630mut#tgf6 maxim integrated products 12-bit + sign digital temperature sensors with serial interf - tape and reel max6630mut#tgf6 1 wks factory lead time
2500 : $2.45
max6635msa+ maxim integrated products temp sensor dgtl 3-wire/i2c 8soic - rail/tube max6635msa+ 974 in stock
1 : $5.29
25 : $3.70
50 : $2.68
100 : $2.47
500 : $2.34
see more
max6631mtt+ maxim integrated products 12-bit + sign digital temperature s - rail/tube max6631mtt+ call for delivery
requires quote
max6630mut#g16 maxim integrated products 12-bit + sign digital temperature s - rail/tube max6630mut#g16 call for delivery
requires quote
max6638evkit maxim integrated products temperature monitor with dual seria - rail/tube max6638evkit call for delivery
requires quote
max663eja maxim integrated products cmos +5v/adjustable micropower positive volta - bulk max663eja call for delivery
requires quote
max6632mtt-t maxim integrated products 12-bit + sign digital temperature s - tape and reel max6632mtt-t call for delivery
requires quote
max6631mut-t maxim integrated products 12-bit + sign digital temperature sensors wit - tape and reel max6631mut-t call for delivery
requires quote
max6632mtt maxim integrated products 12-bit + sign digital temperature s - rail/tube max6632mtt call for delivery
requires quote
max6632mut maxim integrated products 12-bit + sign digital temperature s - rail/tube max6632mut call for delivery
requires quote
max6633msa maxim integrated products 12-bit + sign temperature sensors with smbus/ - bulk max6633msa 32 wks factory lead time
requires quote
max6633msa-t maxim integrated products 12-bit + sign temperature sensors with smbus/ - tape and reel max6633msa-t call for delivery
requires quote
max6634msa-t maxim integrated products 12-bit + sign temperature sensors with smbus/ - tape and reel max6634msa-t call for delivery
5000 : $2.43
max6639aee maxim integrated products 2-channel temperature monitor w dual, automat - rail/tube max6639aee call for delivery
requires quote
max663csa-t maxim integrated products cmos +5v/adjustable micropower positive volta - tape and reel max663csa-t call for delivery
2500 : $2.38
max663epa maxim integrated products cmos +5v/adjustable micropower positive volta - bulk max663epa 7 wks factory lead time
2500 : $3.09
max6630mut#tg16 maxim integrated products 12-bit + sign digital temperature sensors with serial interf - tape and reel max6630mut#tg16 1 wks factory lead time
2500 : $2.45
max6639yaee+t maxim integrated products temp monitor 16qsop - tape and reel max6639yaee+t 1 wks factory lead time
2500 : $2.78
rs components - china • authorized distributor
元器件型號 廠商 描述 rs # 數(shù)量 china
max6633msa+ maxim temp sensor digital serial 3-wire, i2c 7326807p 100
max6639aee+ maxim temp sensor digital serial 2-wire, i2c 7326801p 100
max663cpa+ maxim linear voltage regulator,max663cpa 16v 332786p 5
max663csa+ maxim ic max663csa 5404586 2
max663csa+ maxim ic max663csa 5404586p 89
quest components
quest components, inc.   search results availability quantity price
breaks
part#: max6635msa+
desc: digital temp sensor-serial, 12bit(s), 2.50cel, rectangular, surface mount
mfg: maxim integrated products inc
in stock 7 1 $5.2500
3 $3.5000
8 $2.6250

buy now
part#: max663csa
desc: voltage regulator, +1.3 to +16v, 8 pin, plastic, sop
mfg: maxin
in stock 24 1 $6.4500
3 $4.3000
7 $3.2250

buy now
part#: max663eja
desc: voltage regulator, +1.3 to +16v, 8 pin, ceramic, dip
mfg: maxim
in stock 6
submit request for pricing

submit
rfq
distrelec - switzerland
元器件型號 廠商 描述 distrelec # 數(shù)量 switzerland 價(jià)格 (chf)
max6639aee+ maxim temp mon w/dual, auto, fan-speed contr 663377 available for order
chf 7.56
crestwood technology group
元器件型號 廠商 rapid quote 數(shù)量
max663cpa maxim get rapid quote 3
mouser electronics • ecia (neda) member • authorized distributor
mouser electronics product detail pricing availability
mfr. part #: max6639ate+
mfr.: maxim integrated products
description: board mount temperature sensors 2ch temperature monitor
rohs: yes
mouser part #: 700-max6639ate
1:  $6.00
25:  $3.04
100:  $2.80
500:  $2.63
0:  $0.00
350
in stock
mfr. part #: max6635msa+
mfr.: maxim integrated products
description: board mount temperature sensors 12-bit + sign temperature sensor
rohs: yes
mouser part #: 700-max6635msa
1:  $5.29
25:  $2.68
100:  $2.47
500:  $2.31
0:  $0.00
146
in stock
mfr. part #: max6633msa+
mfr.: maxim integrated products
description: board mount temperature sensors 12-bit + sign temperature sensor
rohs: yes
mouser part #: 700-max6633msa
1:  $4.94
25:  $2.51
100:  $2.31
500:  $2.16
0:  $0.00
399
in stock
mfr. part #: max6636up9a+
mfr.: maxim integrated products
description: board mount temperature sensors 7ch precision temperature monitor
rohs: yes
mouser part #: 700-max6636up9a
1:  $11.03
25:  $5.59
100:  $5.15
500:  $4.83
0:  $0.00
74
in stock
mfr. part #: max663csa+
mfr.: maxim integrated products
description: low dropout (ldo) regulators 5v prog upower voltage regulator
rohs: yes
mouser part #: 700-max663csa
1:  $5.00
25:  $2.54
100:  $2.33
500:  $2.19
0:  $0.00
220
in stock
mfr. part #: max6639aee+
mfr.: maxim integrated products
description: board mount temperature sensors 2ch temperature monitor
rohs: yes
mouser part #: 700-max6639aee
1:  $6.00
25:  $3.04
100:  $2.80
500:  $2.63
0:  $0.00
50
in stock
mfr. part #: max6639faee+
mfr.: maxim integrated products
description: board mount temperature sensors 2ch temperature monitor
rohs: yes
mouser part #: 700-max6639faee
1:  $6.29
25:  $3.19
100:  $2.93
500:  $2.75
0:  $0.00
200
in stock
mfr. part #: max6631mtt+t
mfr.: maxim integrated products
description: board mount temperature sensors 12-bit + sign temperature sensor
rohs: yes
mouser part #: 700-max6631mttt
1:  $5.43
25:  $4.02
100:  $2.91
500:  $2.51
0:  $0.00
2,125
in stock
mfr. part #: max663cpa+
mfr.: maxim integrated products
description: low dropout (ldo) regulators 5v prog upower voltage regulator
rohs: yes
mouser part #: 700-max663cpa
1:  $4.54
25:  $2.30
100:  $2.12
500:  $1.99
0:  $0.00
255
in stock
mfr. part #: max6634msa+
mfr.: maxim integrated products
description: board mount temperature sensors 12-bit + sign temperature sensor
rohs: yes
mouser part #: 700-max6634msa
1:  $5.11
25:  $2.59
100:  $2.39
500:  $2.24
0:  $0.00
65
in stock
mfr. part #: max663esa+
mfr.: maxim integrated products
description: low dropout (ldo) regulators 5v prog upower voltage regulator
rohs: yes
mouser part #: 700-max663esa
1:  $7.43
25:  $3.77
100:  $3.47
500:  $3.25
0:  $0.00
462
in stock