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參數(shù)資料
| 型號： | LM2240 |
| 廠商： | National Semiconductor Corporation |
| 元件分類： | 通用總線功能 |
| 英文描述： | Programmable Timer/Counter |
| 中文描述： | 可編程定時器/計數(shù)器 |
| 文件頁數(shù)： | 1/10頁 |
| 文件大?。?/td> | 201K |
| 代理商： | LM2240 |
TL/H/10837
L
August 1990
LM2240
Programmable Timer/Counter
General Description
The LM2240 Programmable Timer/Counter is a monolithic
controller capable of both monostable and astable opera-
tion. Monostable operation allows accurate microsecond to
five day time delays. Long delays, up to three years, can
easily be generated by cascading two timers. The timer con-
sists of a time-base oscillator, programmable 8-bit counter
and control flip-flop. An external resistor-capacitor (RC) net-
work sets the oscillator frequency and allows delay times
from 1 RC to 255 RC to be selected. In the astable mode of
operation, a single RC network sets the base frequency.
The frequencies of the squarewaves at the 8 outputs are
each at different factors of 2 from the base frequency. If 2 or
more of the outputs are shorted together, various pulse pat-
terns can be generated. These frequencies or pulse pat-
terns can also easily be synchronized to an external signal.
The trigger, reset and outputs are all TTL and CMOS com-
patible for easy interface with digital systems. The timer’s
high accuracy and versatility in producing a wide range of
time delays makes it ideal as a direct replacement for me-
chanical or electromechanical devices.
Features
Y
Accurate timing from microseconds to days
Y
Programmable delays from 1 RC to 255 RC
Y
TTL and CMOS compatible outputs
Y
Timing directly proportional to RC time constant
Y
High accuracy
Y
External sync and modulation capability
Y
Wide supply voltage range
Y
Excellent supply voltage rejection
Connection Diagram
16-Lead Molded DIP
TL/H/10837–1
Top View
See NS Package Number N16E
Order Number LM2240N
C
1995 National Semiconductor Corporation
RRD-B30M115/Printed in U. S. A.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LM2240N | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Programmable Timer/Counter |
| LM22-475-P3 | 功能描述:基本/快動開關(guān) Foot Switch RoHS:否 制造商:Omron Electronics 觸點形式:SPDT 執(zhí)行器:Lever 電流額定值:5 A 電壓額定值 AC:250 V 電壓額定值 DC:30 V 功率額定值: 工作力:120 g IP 等級:IP 67 NEMA 額定值: 端接類型:Wire 安裝:Panel |
| LM224A | 制造商:TI 制造商全稱:Texas Instruments 功能描述:Quadruple operationl amplifiers |
| LM224A_06 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:Low power quad operational amplifiers |
| LM224AD | 功能描述:運算放大器 - 運放 Quad RoHS:否 制造商:STMicroelectronics 通道數(shù)量:4 共模抑制比（最小值）:63 dB 輸入補償電壓:1 mV 輸入偏流（最大值）:10 pA 工作電源電壓:2.7 V to 5.5 V 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-16 轉(zhuǎn)換速度:0.89 V/us 關(guān)閉:No 輸出電流:55 mA 最大工作溫度:+ 125 C 封裝:Reel |
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