74LS191N中文资料PDF规格书
74LS191N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:
74LS191N
- 制造商:
North American Philips Discrete Products Div
- 功能描述:
Counter, Up/Down, 4 Bit Binary, 16 Pin, Plastic, DIP
供应商 | 型号 | 品牌 | 批号 | 封装 | 库存 | 备注 | 价格 |
---|---|---|---|---|---|---|---|
TI |
23+ |
DIP |
8000 |
全新原装,现货热卖 |
询价 | ||
23+ |
N/A |
46380 |
正品授权货源可靠 |
询价 | |||
原厂 |
23+ |
DIP |
5000 |
原装正品,假一罚十 |
询价 | ||
Sig |
23+ |
DIP |
8890 |
价格优势、原装现货、客户至上。欢迎广大客户来电查询 |
询价 | ||
F |
2021+ |
DIP |
5000 |
原厂授权代理,海外优势订货渠道。可提供大量库存,详 |
询价 | ||
FAIRCHILD/仙童 |
23+ |
DIP |
50000 |
全新原装正品现货,支持订货 |
询价 | ||
PHILIPS |
23+ |
DIP |
5000 |
专注配单,只做原装进口现货 |
询价 | ||
S |
2122+ |
PDIP |
11190 |
全新原装正品现货,优势渠道可含税,假一赔十 |
询价 | ||
74LS191N |
1 |
1 |
询价 | ||||
FUJITSU |
22+ |
DIP |
2987 |
只售原装自家现货!诚信经营!欢迎来电! |
询价 |