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SN74LS190N中文资料
SN74LS190N数据手册规格书PDF详情
PRESETTABLE BCD/DECADE UP/DOWN COUNTERS
PRESETTABLE 4-BIT BINARY UP/DOWN COUNTERS
The SN54/74LS190 is a synchronous UP/DOWN BCD Decade (8421) Counter and the SN54/74LS191 is a synchronous UP/DOWN Modulo-16 Binary Counter. State changes of the counters are synchronous with the LOW-to-HIGH transition of the Clock Pulse input.
An asynchronous Parallel Load (PL) input overrides counting and loads the data present on the Pn inputs into the flip-flops, which makes it possible to use the circuits as programmable counters. A Count Enable (CE) input serves as the carry /borrow input in multi-stage counters. An Up/Down Count Control (U/D) input determines whether a circuit counts up or down. A Terminal Count (TC) output and a Ripple Clock (RC) output provide overflow/underflow indication and make possible a variety of methods for generating carry/borrow signals in multistage counter applications.
• Low Power . . . 90 mW Typical Dissipation
• High Speed . . . 25 MHz Typical Count Frequency
• Synchronous Counting
• Asynchronous Parallel Load
• Individual Preset Inputs
• Count Enable and Up/Down Control Inputs
• Cascadable
• Input Clamp Diodes Limit High Speed Termination Effects
供应商 | 型号 | 品牌 | 批号 | 封装 | 库存 | 备注 | 价格 |
---|---|---|---|---|---|---|---|
MOTOROLA |
17+ |
DIP |
6200 |
100%原装正品现货 |
|||
TI(德州仪器) |
23+ |
标准封装 |
12048 |
原厂直销,大量现货库存,交期快。价格优,支持账期 |
|||
TI/德州仪器 |
2404+ |
DIP-16 |
3300 |
现货正品原装,假一赔十 |
|||
DIP16 |
75 |
本站现货库存 |
|||||
TI |
2020+ |
DIP |
350000 |
100%进口原装正品公司现货库存 |
|||
TI |
23+ |
DIP-16 |
8650 |
受权代理!全新原装现货特价热卖! |
|||
MOT |
23+ |
NA |
116 |
专做原装正品,假一罚百! |
|||
TI |
24+ |
DIP16 |
90000 |
一级代理商进口原装现货、假一罚十价格合理 |
|||
TI |
96+ |
DIP16 |
24503 |
进口原管现货/25 |
|||
TI |
1824+ |
DIP16 |
3108 |
原装现货专业代理,可以代拷程序 |
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Datasheet数据表PDF页码索引
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Motorola, Inc 摩托罗拉
摩托罗拉(Motorola)是全球集成通讯方案和嵌入电子方案的领导者,该分部目前共有人员约32,000人,分布在制造厂、实验室、技术设计中心及全球销售机构。摩托罗拉Motorola公司的半导体分部设在美国的克萨斯州的Austin。是世界头号嵌入处理器制造商,所生产的嵌入芯片无处不在,从蜂窝电话、桌面电脑、Internet收发器件、打印机、多媒体产品、数码相机到运输核工业应用如安全气囊、卫星全球定位系统,都可以发现嵌入芯片的踪影。它的集成通讯方案包括:软件增强无线电话、two-wayradio、messaging和卫星通讯产品及系统,也包括网络产品和Internet接入产品。