74LS190中文资料PDF规格书
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74LS190规格书详情
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
产品属性
- 型号:
74LS190
- 制造商:
MOTOROLA
- 制造商全称:
Motorola, Inc
- 功能描述:
PRESETTABLE BCD/DECADE UP/DOWN COUNTERS PRESETTABLE 4-BIT BINARY UP/DOWN COUNTERS
供应商 | 型号 | 品牌 | 批号 | 封装 | 库存 | 备注 | 价格 |
---|---|---|---|---|---|---|---|
2020+ |
DIP |
80000 |
只做自己库存,全新原装进口正品假一赔百,可开13%增 |
询价 | |||
PANASON |
2016+ |
DIP14 |
6528 |
只做进口原装现货!假一赔十! |
询价 | ||
罗彻斯特 |
23+ |
6000 |
诚信服务,绝对原装原盘 |
询价 | |||
FAIRCHILD |
81/26 |
205 |
原装正品长期供货,如假包赔包换 徐小姐13714450367 |
询价 | |||
XINBOLE/芯伯乐 |
23+ |
NA/ |
16602 |
原装现货,当天可交货,原型号开票 |
询价 | ||
XINBOLE/芯伯乐 |
24+23+ |
DIP16 |
12580 |
16年现货库存供应商终端BOM表可配单提供样品 |
询价 | ||
PANASONI |
22+23+ |
DIP14 |
21633 |
绝对原装正品全新进口深圳现货 |
询价 | ||
三菱 |
2020+ |
原厂封装 |
8352 |
专营军工航天芯片,只做全新原装,价格超低! |
询价 | ||
PANASONI |
DIP14 |
608900 |
原包原标签100%进口原装常备现货! |
询价 | |||
2 |
询价 |