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SN74LS490D中文资料摩托罗拉数据手册PDF规格书
SN74LS490D规格书详情
The SN54/74LS490 contains a pair of high-speed 4-stage ripple counters. Each half of the SN54/74LS490 has individual Clock, Master Reset and Master Set (Preset 9) inputs. Each section counts in the 8, 4, 2, 1 BCD code.
• Dual Version of SN54/74LS490
• Individual Asynchronous Clear and Preset to 9 for Each Counter
• Count Frequency — Typically 65 MHz
• 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 |
|---|---|---|---|---|---|---|---|
TI/德州仪器 |
24+ |
NA/ |
3748 |
原厂直销,现货供应,账期支持! |
询价 | ||
TI/德州仪器 |
21+ |
DIP |
1709 |
询价 | |||
TI |
DIP |
9500 |
一级代理 原装正品假一罚十价格优势长期供货 |
询价 | |||
TI/德州仪器 |
22+ |
DIP |
12245 |
现货,原厂原装假一罚十! |
询价 | ||
TI |
25+ |
26 |
公司优势库存 热卖中!! |
询价 | |||
TI |
25+ |
SOP |
2987 |
只售原装自家现货!诚信经营!欢迎来电! |
询价 | ||
MMI |
25+23+ |
DIP |
69500 |
绝对原装正品现货,全新深圳原装进口现货 |
询价 | ||
TI/德州仪器 |
22+ |
SOP-14 |
3000 |
原装正品,支持实单 |
询价 | ||
MOTOROL |
25+ |
DIP16 |
8 |
百分百原装正品 真实公司现货库存 本公司只做原装 可 |
询价 | ||
MOTOROLA |
22+ |
DIP16 |
5000 |
原装现货库存.价格优势 |
询价 |
