Datasheet > MIC1557YD5

MIC1557YD5

更新时间： 2024-11-30 01:09:39

品牌	Logo	应用领域
麦瑞 - MICREL		光电二极管
页数	文件大小	规格书
18页	947K
描述
IttyBittyÂ® RC Timer/Oscillator

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MIC1557YD5 数据手册

MIC1555/1557

IttyBitty^®RC Timer/Oscillator

Features

General Description

• +2.7V to +18V operation

• Low current

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.

− <1µA typical shutdown mode (MIC1557)

− 200µA typical (TRG and THR low) at 3V supply

• Timing from microseconds to hours

• “Zero” leakage trigger and threshold inputs

• 50% square wave with one resistor, one capacitor

• Threshold input precedence over trigger input

• <15Ω output on resistance

The devices are similar in function to the industry standard

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

collector discharge (D) pin. The threshold pin (THR) has

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

BiCMOS output is off when TRG is high.

The MIC1555 can 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 micro-

seconds 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.

• No output cross-conduction current spikes

• <0.005%/°C temperature stability

• <0.055%/V supply stability

• 10-pin ultra-thin DFN package (2mm × 2mm × 0.4mm)

• Small SOT-23-5 surface mount package

Applications

• Precision timer

• Pulse generation

• Sequential timing

The MIC1557 is designed for astable (oscillator) operation

only, with a chip select/reset (CS) input for low power shut-

down. 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.

• Time-delay generation

• Missing pulse detector

• Micropower oscillator to 5MHz

• Charge-pump driver

• LED blinker

• Voltage converter

• Linear sweep generator

• Variable frequency and duty cycle oscillator

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

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

temperature range. The MIC1555/7 is available in SOT-23-

5, and thin SOT23-5 5-pin packages. A low profile, ultra-

thin, (UTDFN), version of the MIC1555 (with chip select) is

also available.

Datasheets and support documentation are available on

Micrel’s website at: www.micrel.com.

IttyBitty is a registered trademark of Micrel, Inc.

Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com

Revision 6.1

August 12, 2015

12 3 4 5 6 7...18

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与MIC1557YD5相关器件

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MIC1557YM5	MICREL	获取价格	IttyBitty RC Timer / Oscillator
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