IC ICM7555 Standard Timer 8-pin DIP

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$0.79 ea

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  • Jameco Part no.: 51140
  • Manufacturer: Major Brands
  • Manufacturer no.: 7555IPA
  • Jameco Catalog
  • This item is discontinued and is not
    recommended for new designs.
# of units Price
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100+ $0.42
500+ $0.39

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Standard Timer Single 8-Pin

Specifications

The ICM7555 and ICM7556 are CMOS RC timers providing significantly improved performance over the standard SE/NE 555/6 and 355 timers, while at the same time being direct replacements for those devices in most applications. Improved parameters include low supply current, wide operating supply voltage range, low THRESHOLD, TRIGGER and RESET currents, no crowbarring of the supply current during output transitions, higher frequency performance and no requirement to decouple CONTROL VOLTAGE for stable operation. Specifically, the ICM7555 and ICM7556 are stable controllers capable of producing accurate time delays or frequencies. The ICM7556 is a dual ICM7555, with the two timers operating independently of each other, sharing only V+ and GND. In the one shot mode, the pulse width of each circuit is precisely controlled by one external resistor and capacitor. For astable operation as an oscillator, the free running frequency and the duty cycle are both accurately controlled by two external resistors and one capacitor. Unlike the regular bipolar SE/NE 555/6 devices, the CONTROL VOLTAGE terminal need not be decoupled with a capacitor. The circuits are triggered and reset on falling (negative) waveforms, and the output inverter can source or sink currents large enough to drive TTL loads, or provide minimal offsets to drive CMOS loads.

Features

  • Exact Equivalent in Most Cases for SE/NE555/556 or TLC555/556
  • Low Supply Current
  • Extremely Low Input Currents
  • High Speed Operation
  • Guaranteed Supply Voltage Range
  • Temperature Stability: 0.005%/°C at +25°C
  • Normal Reset Function - No Crowbarring of Supply During Output Transition
  • Can be Used with Higher Impedance Timing Elementsthan Regular 555/6 for Longer RC Time Constants
  • Timing from Microseconds through Hours
  • Operates in Both Astable and Monostable Modes
  • Adjustable Duty Cycle
  • High Output Source/Sink Driver can Drive TTL/CMOS
  • Outputs have Very Low Offsets, HI and LO

    Applications

  • Precision Timing
  • Pulse Generation
  • Sequential Timing
  • Time Delay Generation
  • Pulse Width Modulation
  • Pulse Position Modulation
  • Missing Pulse Detector

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  • Specification Value
    Supplier PackagePDIP
    TypeStandard
    Number of Internal Timers1
    Maximum High Level Output Current-0.8mA
    Minimum Operating Supply Voltage2V
    Maximum Low Level Output Current20mA
    Typical Operating Supply Voltage2.5V|3.3V|5V|9V|12V|15V
    Maximum Operating Supply Voltage18V
    FamilyICM7555
    Minimum Operating Temperature-25°C
    Product Width7.11mm(Max)
    Maximum Operating Temperature85°C
    Product Length10.16mm(Max)
    Screening LevelIndustrial
    MountingThrough Hole
    Pin_Count8
    Product Height4.95mm(Max)
    Product TypeTimer


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