数据列表MIC1555, MIC1557;

标准包装  3,000

包装  标准卷带 

零件状态   在售

类别   集成电路（IC）

产品族  时钟/计时 - 可编程计时器和振荡器系列IttyBitty®

规格类型555 型，计时器/振荡器（单路）计数-频率5MHz电压 - 电源2.7V ~ 18V电流 - 电源350μA工作温度-40°C ~ 85°C封装/外壳SC-74A，SOT-753供应商器件封装SOT-23-5安装类型表面贴装

General Description

The MIC1555 IttyBitty®

CMOS RC timer/oscillator and

MIC1557 IttyBitty®

CMOS RC oscillator are designed to

provide rail-to-rail pulses for precise time delay or

frequency generation.

The devices are similar in function to the industry standard

“555”, without a frequency control (FC) pin or an opencollector

discharge (D) pin. The threshold pin (TH) has

precedence over the trigger (TR) input, ensuring that the

BiCMOS output is off when TR is high.

The MIC1555 may be used as an astable (oscillator) or

monostable (one-shot) with separate threshold and trigger

inputs. In the one-shot mode, the output pulse width is

precisely controlled by an external resistor and a capacitor.

Time delays may be accurately controlled from microseconds

to hours. In the oscillator mode, the output is

used to provide precise feedback, with a minimum of one

resistor and one capacitor producing a 50% duty cycle

square wave.

The MIC1557 is designed for astable (oscillator) operation

only, with a chip select/reset (CS) input for low power shutdown.

One resistor and one capacitor provide a 50% duty

cycle square wave. Other duty-cycle ratios may be

produced using two diodes and two resistors.

The MIC1555/7 is powered from a +2.7V to +18V supply

voltage.

The MIC1555/7 is available in the SOT-23-5 5-pin

package, and is rated for –40°C to +85°C ambient

temperature range  

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