74HC4049D
289
SOP/21+
原装 价格优势
74HC4049D
1500
SOP16/1728+
原装现货,假一赔十
74HC4049D
1173
SOP/2040+
原装现货成单即发
74HC4049D
1500
-/-
一手渠道,全新原装
74HC4049D
4350
SOP16/22+
13年行业经验挂帅启航/一站配齐/当天出货
74HC4049
21606
SMD/2020+
原装现货有意者QQ洽谈
74HC4049
1000
DIP16/20+
原装现货,欢迎咨询
74HC4049
28800
DIP/22+
原装现货,提供配单服务
74HC4049
10000
DIP/2019+
原装配单报价
74HC4049
5250
NA//23+
原装现货,当天可交货,原型号开票
74HC4049
3000
DIP/10+
原装正品热卖,价格优势
74HC4049
65286
-/21+
全新原装现货,长期供应,免费送样
74HC4049
5000
DIP/24+
原装现货,提供优质服务
74HC4049
5000
DIP/24+
房间现货,诚信经营,提供BOM配单服务
74HC4049
21800
DIP/23+
现货库存,如实报货,价格优势,一站式配套服务
74HC4049
15862
SOP512/22+
全新原装现货热卖
74HC4049
30000
SMD/22+
只做原装假一罚十
our digital i/o lines instead of eight. saving four of a 4-bit 礐's precious i/o lines couild be significant. the 4-bit 礐's adc provides the key to the savings. the 礐's output lines, f1 through f4, energize the keypad's column lines one at a time via 74hc4049 buffer/driver. if a user presses a key, the 礐's adc reads an analog voltage coresponding to the row of the pressed key. the resistors that the keypad's keys connect to the 礐's adc determine the voltage that the adc sees. table 1 lists these voltages
4-bit binary counter 4位二进制计数器74hc4016 quad analog switch 四路模拟量开关74hc4020 14-stage binary counter 14输出计数器74hc4017 decade counter/divider with 10 decoded outputs十进制计数器带10个译码输出端74hc4040 12 stage binary counter 12出计数器74hc4046 phase lock loop 相位监测输出器74hc4049 level down converter 电平变低器74hc4050 level down converter 电平变低器74hc4051 8-ch analog mux 8通道多路器74hc4052 4-ch analog mux 4通道多路器74hc4053 2-ch analog mux 2通道多路器74hc4060 14-stage binary counter 14阶bin计数74hc4066 quad analog mux 四通道多路器74h