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SN74LS251N /编码器、解码器、复用器和解复用器 8 to 1
SN74LS251N的规格信息
SN74LS251N的图片

图像仅供参考，请参阅规格书

制造商:Texas Instruments

产品种类:编码器、解码器、复用器和解复用器

RoHS:是

产品:Selectors / Multiplexers

逻辑系列:LS

输入线路数量:8 Input

输出线路数量:1 Output

传播延迟时间:45 ns

电源电压-最小:4.75 V

电源电压-最大:5.25 V

最小工作温度:0 C

最大工作温度:+ 70 C

安装风格:Through Hole

封装 / 箱体:PDIP-16

封装:Tube

功能:8 to 1

高度:4.57 mm

输入电压:2.0 V to 0.8 V

长度:19.3 mm

电路数量:Quad

工作温度范围:0 C to + 70 C

输出电流:- 800 mA

输出电压:4.75 V to 5.25 V

系列:SN74LS251

技术:Bipolar

宽度:6.35 mm

商标:Texas Instruments

逻辑类型:Data Selectors/Multiplexers

高电平输出电流:- 2.6 mA

低电平输出电流:8 mA

最大时钟频率:35 MHz

工作电源电压:5 V

产品类型:Encoders, Decoders, Multiplexers & Demultiplexers

工厂包装数量:25

子类别:Logic ICs

单位重量:1 g

供应商SN74LS251N
SN74LS251N的供应商,可免费索样
供应商型号地址联系电话联系人在线联系询价
深圳市威雅利发展有限公司SN74LS251NSR华强北路1019号华强广场A16楼18124047120
18124047120		韩雪Email:3004202884@qq.com询价
深圳市芯幂科技有限公司SN74LS251N深圳市福田区福田街道福安社区民田路178号华融大厦240513267088774
13267088774 (微信同号)		Alienskype:live:.cid.3d55cb3c1097ae8dEmail:service@xinmisc.com询价
深圳市良普科电子有限公司SN74LS251NSR华强北上步工业区501栋503室0755-82568696
18688969163		张小姐Email:sales@lanpuke.com询价
深圳市荣创芯微科技有限公司SN74LS251NE4深圳市福田区华强北都会B做12N0755-82501483
15818715186		郭小姐Email:860705666@qq.com询价
集好芯城SN74LS251N深圳市福田区深南中路3023号汉国中心55楼0755-82564006
18188616613		郑小姐Email:sam@678ic.com询价
深圳市德州众泰科技有限公司SN74LS251N深圳市福田区汉国中心55楼0755-82780836
13360526935		蔡泽锋Email:sam@678ic.com询价
深圳市佳威星科技有限公司SN74LS251N深圳市福田区华强北路现代之窗B座28C0755-83045910
13724343501		胡小姐Email:jiaweixingic@126.com询价
集好芯城SN74LS251N深圳市福田区航都大厦25F4008626627
13360071553		陈泽辉Email:sam@678ic.com询价
深圳市辉华拓展电子有限公司SN74LS251N深圳市福田区航都大厦25F0755-83289799
18129819897		蔡小姐Email:sam@678ic.com询价
深圳市毅创腾电子科技有限公司SN74LS251N深圳市福田区华强北路现代之窗大厦B座18I室0755-83616256 / 83210909
13725570869		朱小姐Email:szyctdz@163.com询价
万三科技（深圳）有限公司SN74LS251N深圳市龙华区民治街道新牛社区布龙路1010号智慧谷创新园6090755-21006672
18188642307		王小康skype:18188642307Email:leo@wansan.net.cn询价
深圳市仓实科技有限公司SN74LS251N深圳市福田区福田街道17080955875李先生Email:service@cangshixc.com询价
深圳市维基鸿电子有限公司SN74LS251N赛格科技园2栋100813148740189/ 19520735817/13632918917
13590238352，13058174971, 18123793983, 13148740189, 13632918917		文小姐，米小姐，朱小姐Email:1076822082@QQ.COM询价
深圳市浩睿泽电子科技有限公司SN74LS251N深圳市福田区福田街道岗厦社区彩田路3069号星河世纪A栋2003F1919854773352
19854773352		罗先生Email:250652363@qq.com询价
北京金州智业科技有限公司SN74LS251N3www.bjjzzy.com13683302275
13683302275		王先生Email:359548161@qq.com询价
深圳市百视威讯电子科技有限公司SN74LS251N3华强广场C座18J0755-27381274
18098996457		董先生skype:微信15013613919Email:15013613919@163.com询价
深圳市赛美科科技有限公司SN74LS251N广东省深圳市福田区华强北上步工业区101栋5楼A5950755-28309323
13480875861		雷小姐，微信与手机号同号QQ无回复请加微信或打电话Email:2053086415@qq.com询价
深圳市宇浩扬科技有限公司SN74LS251N深圳市福田区华强北上步工业区201栋3160755-83223003
13826514222		余先生，张先生Email:grady4222@126.com询价
深圳市凌特半导体科技有限公司SN74LS251N广东省深圳市华康大夏2栋210-219室0755-82714723
13923432237		谢先生Email:3003989381@qq.com询价
深圳诚思涵科技有限公司SN74LS251N深圳市福田区华强北路上步工业区101栋518室0755-23947236/83015506
15302723671/15820783671		曾小姐Email:2748708193@qq.com询价
SN74LS251N及相关型号的PDF资料
型号功能描述生产厂商厂商LOGOPDF大小PDF页数下载地址相关型号
SN74LS251N8-INPUT MULTIPLEXER WITH 3-STATE OUTPUTS MOTOROLA[Motorola, Inc]MOTOROLA[Motorola, Inc]的LOGO181.91 Kbytes共6页SN74LS251N的PDF下载地址IN74ACT251,SL74HC251,74F251A,MC54-74HC251,MC54-74HC354,IN74AC251,IN74HC251A,74AC11257,IN74HC257,74AC251
SN74LS251NLOW POWER SCHOTTKY ONSEMI[ON Semiconductor]ONSEMI[ON Semiconductor]的LOGO125.87 Kbytes共8页SN74LS251N的PDF下载地址SN74LS109A,SN74LS195A,SN74LS38,SHD114211,SHD114411,SHD115422,SHD116212,SHD117122,SHD125212,STPS15L25D
SN74LS251NDATA SELECTORS/MULTIPLEXERS WITH 3-STATE OUTPUTS TI[Texas Instruments]TI[Texas Instruments]的LOGO312.93 Kbytes共9页SN74LS251N的PDF下载地址SN54F253,SN54HC253,IN74ACT251,IN74HC257,74AC11257,SN54F257,SN54HC257,SL74HC251,SN54F258,74ACT16254
SN74LS251NE4SN74LS251 8-LINE TO 1-LINE DATATexas InstrumentsTexas Instruments的LOGO1.8 Mbytes共25页SN74LS251NE4的PDF下载地址无
SN74LS251N的全球分销商及价格
销售商型号制造商功能描述价格
元器件资料网-Arrow(艾睿)的LOGO
Arrow(艾睿)		SN74LS251NTexas Instruments逻辑 - 信号开关，多路复用器，解码器 74LS 集成电路 (IC) 半导体 编码器、解码器、复用器和解复用器 8 to 11+:￥6.6899
10+:￥5.3699
100+:￥4.13
500+:￥3.2
1000+:￥2.88
2500+:￥2.55
10000+:￥2.45
25000+:￥2.41+:￥5.3301
10+:￥4.28
100+:￥3.3
500+:￥2.91
1000+:￥2.8401
2500+:￥2.61
10000+:￥2.54
25000+:￥2.48
50000+:￥2.411+:￥6.57
10+:￥5.27
100+:￥4.0525+:￥4.41
50+:￥4.08
500+:￥3.4
1000+:￥3.13
2000+:￥2.721+:￥6.77
25+:￥5.81
100+:￥5.1
250+:￥4.46
500+:￥3.46
1000+:￥3.06
2000+:￥2.79
5000+:￥2.500125+:￥6.0101
100+:￥4.85
250+:￥4.62
500+:￥3.681+:￥3.09
元器件资料网-Arrow(艾睿)的LOGO
Arrow(艾睿)		SN74LS251NE4Texas Instruments逻辑 - 信号开关，多路复用器，解码器 74LS 集成电路 (IC) 半导体 编码器、解码器、复用器和解复用器 8 To 1 Data Slctr/ Mltplxr W/3-St Otpt950+:￥3.19950+:￥2.91
1000+:￥2.8401
2500+:￥2.61
10000+:￥2.54
25000+:￥2.48
50000+:￥2.4125+:￥4.41
50+:￥4.08
500+:￥3.4
1000+:￥3.13
2000+:￥2.7225+:￥6.0101
100+:￥4.85
250+:￥4.62
500+:￥3.681+:￥3.09
元器件资料网-Arrow(艾睿)的LOGO
Arrow(艾睿)		SN74LS251NSRTexas Instruments逻辑 - 信号开关，多路复用器，解码器 74LS 集成电路 (IC)1+:￥6.91
10+:￥6.12
25+:￥5.54
100+:￥4.8401
250+:￥4.24
500+:￥3.77
750+:￥3.28
1000+:￥2.981+:￥5.3301
10+:￥4.28
100+:￥3.3
500+:￥2.91
1000+:￥2.8401
2000+:￥2.61
10000+:￥2.54
24000+:￥2.48
50000+:￥2.411+:￥3.09
元器件资料网-Avnet Express的LOGO
Avnet Express		SN74LS251NTexas Instruments8-INPUT DATA SELE/MULTIPLEXER - Rail/Tube1 : $0.4373
999 : $0.4253
元器件资料网-Bristol Electronics的LOGO
Bristol Electronics		SN74LS251NTexas Instruments价格未公开
元器件资料网-Bristol Electronics的LOGO
Bristol Electronics		SN74LS251NMotorola Mobility LLC594 : $0.144
1,286 : $0.126
元器件资料网-Chip One Exchange的LOGO
Chip One Exchange		SN74LS251N价格未公开
元器件资料网-Chip1Stop的LOGO
Chip1Stop		SN74LS251NTexas InstrumentsMultiplexer 1-Element Bipolar 3-ST 8-IN 16-Pin PDIP Tube
RoHS : Compliant		25 : $0.436
100 : $0.43
元器件资料网-ChipOneStop的LOGO
ChipOneStop		SN74LS251NTexas Instruments逻辑 - 信号开关，多路复用器，解码器 74LS 集成电路 (IC) 半导体 编码器、解码器、复用器和解复用器 8 to 11+:￥6.6899
10+:￥5.3699
100+:￥4.13
500+:￥3.2
1000+:￥2.88
2500+:￥2.55
10000+:￥2.45
25000+:￥2.41+:￥5.3301
10+:￥4.28
100+:￥3.3
500+:￥2.91
1000+:￥2.8401
2500+:￥2.61
10000+:￥2.54
25000+:￥2.48
50000+:￥2.411+:￥6.57
10+:￥5.27
100+:￥4.0525+:￥4.41
50+:￥4.08
500+:￥3.4
1000+:￥3.13
2000+:￥2.72
元器件资料网-ChipOneStop的LOGO
ChipOneStop		SN74LS251NE4Texas Instruments逻辑 - 信号开关，多路复用器，解码器 74LS 集成电路 (IC) 半导体 编码器、解码器、复用器和解复用器 8 To 1 Data Slctr/ Mltplxr W/3-St Otpt950+:￥3.19950+:￥2.91
1000+:￥2.8401
2500+:￥2.61
10000+:￥2.54
25000+:￥2.48
50000+:￥2.4125+:￥4.41
50+:￥4.08
500+:￥3.4
1000+:￥3.13
2000+:￥2.72
元器件资料网-Digi-Key 得捷电子的LOGO
Digi-Key 得捷电子		SN74LS251NTexas InstrumentsIC 8-IN DATASELCT/MUX 3ST 16DIP1,000 : $0.396
500 : $0.5016
100 : $0.6072
10 : $0.779
1 : $0.87
元器件资料网-Digi-Key 得捷电子的LOGO
Digi-Key 得捷电子		SN74LS251NTexas Instruments逻辑 - 信号开关，多路复用器，解码器 74LS 集成电路 (IC) 半导体 编码器、解码器、复用器和解复用器 8 to 11+:￥6.6899
10+:￥5.3699
100+:￥4.13
500+:￥3.2
1000+:￥2.88
2500+:￥2.55
10000+:￥2.45
25000+:￥2.4
元器件资料网-Digi-Key 得捷电子的LOGO
Digi-Key 得捷电子		SN74LS251NON SemiconductorIC MULTIPLEXER 1 X 8:1 16DIP$0.40000
元器件资料网-Digi-Key 得捷电子的LOGO
Digi-Key 得捷电子		SN74LS251NTexas InstrumentsIC MULTIPLEXER 1 X 8:1 16DIP$0.95000
元器件资料网-Digi-Key 得捷电子的LOGO
Digi-Key 得捷电子		SN74LS251NE4Texas InstrumentsSN74LS251 8-LINE TO 1-LINE DATA$0.40000
元器件资料网-Digi-Key 得捷电子的LOGO
Digi-Key 得捷电子		SN74LS251NE4Texas Instruments逻辑 - 信号开关，多路复用器，解码器 74LS 集成电路 (IC) 半导体 编码器、解码器、复用器和解复用器 8 To 1 Data Slctr/ Mltplxr W/3-St Otpt950+:￥3.19
元器件资料网-Digi-Key 得捷电子的LOGO
Digi-Key 得捷电子		SN74LS251NSTexas InstrumentsIC DATA SELECT/MUX 8-1 16SO$0.42000
元器件资料网-Digi-Key 得捷电子的LOGO
Digi-Key 得捷电子		SN74LS251NSRTexas InstrumentsIC MULTIPLEXER 1 X 8:1 16SO$0.95000
元器件资料网-Digi-Key 得捷电子的LOGO
Digi-Key 得捷电子		SN74LS251NSRTexas Instruments逻辑 - 信号开关，多路复用器，解码器 74LS 集成电路 (IC)1+:￥6.91
10+:￥6.12
25+:￥5.54
100+:￥4.8401
250+:￥4.24
500+:￥3.77
750+:￥3.28
1000+:￥2.98
元器件资料网-element14 Asia-Pacific的LOGO
element14 Asia-Pacific		SN74LS251NTexas InstrumentsLOGIC 8-IN DATASELCT/MUX 3ST 16DIP
RoHS : Compliant		1 : $6.06
10 : $4.87
100 : $3.74
500 : $2.89
1,000 : $2.61
2,500 : $2.31
10,000 : $2.28
元器件资料网-element14 e络盟电子的LOGO
element14 e络盟电子		SN74LS251NTexas Instruments逻辑 - 信号开关，多路复用器，解码器 74LS 集成电路 (IC) 半导体 编码器、解码器、复用器和解复用器 8 to 11+:￥6.6899
10+:￥5.3699
100+:￥4.13
500+:￥3.2
1000+:￥2.88
2500+:￥2.55
10000+:￥2.45
25000+:￥2.41+:￥5.3301
10+:￥4.28
100+:￥3.3
500+:￥2.91
1000+:￥2.8401
2500+:￥2.61
10000+:￥2.54
25000+:￥2.48
50000+:￥2.411+:￥6.57
10+:￥5.27
100+:￥4.05
元器件资料网-Mouser 贸泽电子的LOGO
Mouser 贸泽电子		SN74LS251NTexas Instruments逻辑 - 信号开关，多路复用器，解码器 74LS 集成电路 (IC) 半导体 编码器、解码器、复用器和解复用器 8 to 11+:￥6.6899
10+:￥5.3699
100+:￥4.13
500+:￥3.2
1000+:￥2.88
2500+:￥2.55
10000+:￥2.45
25000+:￥2.41+:￥5.3301
10+:￥4.28
100+:￥3.3
500+:￥2.91
1000+:￥2.8401
2500+:￥2.61
10000+:￥2.54
25000+:￥2.48
50000+:￥2.41
元器件资料网-Mouser 贸泽电子的LOGO
Mouser 贸泽电子		SN74LS251NTexas Instruments编码器、解码器、复用器和解复用器 8 to 11:¥6.9156
10:¥5.876
100:¥4.5087
500:¥3.9889
元器件资料网-Mouser 贸泽电子的LOGO
Mouser 贸泽电子		SN74LS251NE4Texas Instruments逻辑 - 信号开关，多路复用器，解码器 74LS 集成电路 (IC) 半导体 编码器、解码器、复用器和解复用器 8 To 1 Data Slctr/ Mltplxr W/3-St Otpt950+:￥3.19950+:￥2.91
1000+:￥2.8401
2500+:￥2.61
10000+:￥2.54
25000+:￥2.48
50000+:￥2.41
元器件资料网-Mouser 贸泽电子的LOGO
Mouser 贸泽电子		SN74LS251NE4Texas Instruments编码器、解码器、复用器和解复用器 8 To 1 Data Slctr/ Mltplxr W/3-St Otpt925:¥3.9889
1,000:¥3.1527
2,500:¥2.8024
10,000:¥2.6894
元器件资料网-Mouser 贸泽电子的LOGO
Mouser 贸泽电子		SN74LS251NSRTexas Instruments编码器、解码器、复用器和解复用器 8 To 1 Data Slctr/ Mltplxr W/3-St Otpt1:¥6.9156
10:¥5.876
100:¥4.5087
500:¥3.9889
2,000:¥2.8024
元器件资料网-Mouser 贸泽电子的LOGO
Mouser 贸泽电子		SN74LS251NSRTexas Instruments逻辑 - 信号开关，多路复用器，解码器 74LS 集成电路 (IC)1+:￥6.91
10+:￥6.12
25+:￥5.54
100+:￥4.8401
250+:￥4.24
500+:￥3.77
750+:￥3.28
1000+:￥2.981+:￥5.3301
10+:￥4.28
100+:￥3.3
500+:￥2.91
1000+:￥2.8401
2000+:￥2.61
10000+:￥2.54
24000+:￥2.48
50000+:￥2.41
元器件资料网-Onlinecomponents的LOGO
Onlinecomponents		SN74LS251NON Semiconductor1+:￥6.6899
10+:￥5.3699
100+:￥4.13
500+:￥3.2
1000+:￥2.88
2500+:￥2.55
10000+:￥2.45
25000+:￥2.41+:￥5.3301
10+:￥4.28
100+:￥3.3
500+:￥2.91
1000+:￥2.8401
2500+:￥2.61
10000+:￥2.54
25000+:￥2.48
50000+:￥2.411+:￥6.57
10+:￥5.27
100+:￥4.0525+:￥4.41
50+:￥4.08
500+:￥3.4
1000+:￥3.13
2000+:￥2.721+:￥6.77
25+:￥5.81
100+:￥5.1
250+:￥4.46
500+:￥3.46
1000+:￥3.06
2000+:￥2.79
5000+:￥2.5001
元器件资料网-Rochester的LOGO
Rochester		SN74LS251NON Semiconductor1+:￥6.6899
10+:￥5.3699
100+:￥4.13
500+:￥3.2
1000+:￥2.88
2500+:￥2.55
10000+:￥2.45
25000+:￥2.41+:￥5.3301
10+:￥4.28
100+:￥3.3
500+:￥2.91
1000+:￥2.8401
2500+:￥2.61
10000+:￥2.54
25000+:￥2.48
50000+:￥2.411+:￥6.57
10+:￥5.27
100+:￥4.0525+:￥4.41
50+:￥4.08
500+:￥3.4
1000+:￥3.13
2000+:￥2.721+:￥6.77
25+:￥5.81
100+:￥5.1
250+:￥4.46
500+:￥3.46
1000+:￥3.06
2000+:￥2.79
5000+:￥2.500125+:￥6.0101
100+:￥4.85
250+:￥4.62
500+:￥3.681+:￥3.0925+:￥4.23
100+:￥3.1799
500+:￥2.811+:￥1.14
25+:￥1.13
50+:￥1.12
100+:￥1.11
300+:￥1.1
500+:￥1.1
1000+:￥1.09
5000+:￥1.08
元器件资料网-Rochester Electronics的LOGO
Rochester Electronics		SN74LS251NRochester Electronics LLCMUX SN74LS251N价格未公开
元器件资料网-Rochester Electronics的LOGO
Rochester Electronics		SN74LS251NON SemiconductorN/A500 : $0.18
1,000 : $0.18
元器件资料网-Rochester Electronics的LOGO
Rochester Electronics		SN74LS251NTexas InstrumentsN/A500 : $0.34
1,000 : $0.33
元器件资料网-RS(欧时)的LOGO
RS(欧时)		SN74LS251NTexas Instruments逻辑 - 信号开关，多路复用器，解码器 74LS 集成电路 (IC) 半导体 编码器、解码器、复用器和解复用器 8 To 1 Data Slctr/ Mltplxr W/3-St Otpt1+:￥6.6899
10+:￥5.3699
100+:￥4.13
500+:￥3.2
1000+:￥2.88
2500+:￥2.55
10000+:￥2.45
25000+:￥2.41+:￥5.3301
10+:￥4.28
100+:￥3.3
500+:￥2.91
1000+:￥2.8401
2500+:￥2.61
10000+:￥2.54
25000+:￥2.48
50000+:￥2.411+:￥6.57
10+:￥5.27
100+:￥4.0525+:￥4.41
50+:￥4.08
500+:￥3.4
1000+:￥3.13
2000+:￥2.721+:￥6.77
25+:￥5.81
100+:￥5.1
250+:￥4.46
500+:￥3.46
1000+:￥3.06
2000+:￥2.79
5000+:￥2.500125+:￥6.0101
100+:￥4.85
250+:￥4.62
500+:￥3.68
元器件资料网-RS(欧时)的LOGO
RS(欧时)		SN74LS251NE4Texas Instruments逻辑 - 信号开关，多路复用器，解码器 74LS 集成电路 (IC) 半导体 编码器、解码器、复用器和解复用器 8 To 1 Data Slctr/ Mltplxr W/3-St Otpt950+:￥3.19950+:￥2.91
1000+:￥2.8401
2500+:￥2.61
10000+:￥2.54
25000+:￥2.48
50000+:￥2.4125+:￥4.41
50+:￥4.08
500+:￥3.4
1000+:￥3.13
2000+:￥2.7225+:￥6.0101
100+:￥4.85
250+:￥4.62
500+:￥3.68
元器件资料网-TME Electronic Components的LOGO
TME Electronic Components		SN74LS251NTEXAS INSTRUMENTSIC: digital; 3-state, multiplexer, data selector; Inputs:8; THT25 : $0.39
元器件资料网-Verical的LOGO
Verical		SN74LS251NTexas Instruments逻辑 - 信号开关，多路复用器，解码器 74LS 集成电路 (IC) 半导体 编码器、解码器、复用器和解复用器 8 to 11+:￥6.6899
10+:￥5.3699
100+:￥4.13
500+:￥3.2
1000+:￥2.88
2500+:￥2.55
10000+:￥2.45
25000+:￥2.41+:￥5.3301
10+:￥4.28
100+:￥3.3
500+:￥2.91
1000+:￥2.8401
2500+:￥2.61
10000+:￥2.54
25000+:￥2.48
50000+:￥2.411+:￥6.57
10+:￥5.27
100+:￥4.0525+:￥4.41
50+:￥4.08
500+:￥3.4
1000+:￥3.13
2000+:￥2.721+:￥6.77
25+:￥5.81
100+:￥5.1
250+:￥4.46
500+:￥3.46
1000+:￥3.06
2000+:￥2.79
5000+:￥2.500125+:￥6.0101
100+:￥4.85
250+:￥4.62
500+:￥3.681+:￥3.0925+:￥4.23
100+:￥3.1799
500+:￥2.81
元器件资料网-Verical的LOGO
Verical		SN74LS251NTexas InstrumentsMultiplexer 1-Element Bipolar 3-ST 8-IN 16-Pin PDIP Tube$0.3615
元器件资料网-Verical的LOGO
Verical		SN74LS251NE4Texas Instruments逻辑 - 信号开关，多路复用器，解码器 74LS 集成电路 (IC) 半导体 编码器、解码器、复用器和解复用器 8 To 1 Data Slctr/ Mltplxr W/3-St Otpt950+:￥3.19950+:￥2.91
1000+:￥2.8401
2500+:￥2.61
10000+:￥2.54
25000+:￥2.48
50000+:￥2.4125+:￥4.41
50+:￥4.08
500+:￥3.4
1000+:￥3.13
2000+:￥2.7225+:￥6.0101
100+:￥4.85
250+:￥4.62
500+:￥3.681+:￥3.091+:￥2.64
元器件资料网-立创商城的LOGO
立创商城		SN74LS251NG4TI(德州仪器)信号开关,多路复用器,解码器1+:￥4.64
200+:￥1.8
500+:￥1.74
1000+:￥1.71
元器件资料网-立创商城的LOGO
立创商城		SN74LS251NSRTI(德州仪器)信号开关,多路复用器,解码器1+:￥4.4
200+:￥1.71
500+:￥1.65
1000+:￥1.62
SN74LS251N的相关型号
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