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74HC5555 Datasheet

Part NameDescriptionManufacturer
74HC5555 Programmable delay timer with oscillator NXP
NXP Semiconductors. NXP
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GENERAL DESCRIPTION
The 74HC/HCT5555 are high-speed Si-gate CMOS devices and are pin compatible with low power Schottky TTL (LSTTL). They are specified in compliance with JEDEC standard no. 7A.

FEATURES
• Positive and negative edge triggered
• Retriggerable or non-retriggerable
• Programmable delay
   minimum: 100 ns
   maximum: depends on input
   frequency and division ratio
• Divide-by range of 2 to 224
• Direct reset terminates output
   pulse
• Very low power consumption in
   triggered start mode
• 3 oscillator operating modes:
   – RC oscillator
   – Crystal oscillator
   – External oscillator
• Device is unaffected by variations
   in temperature and VCC when using
   an external oscillator
• Automatic power-ON reset
• Schmitt trigger action on both
   trigger inputs
• Direct drive for a power transistor
• Low power consumption in active
   mode with respect to TTL type
   timers
• High precision due to digital timing
• Output capability: 20 mA
• ICC category: MSI.

APPLICATIONS
• Motor control
• Attic fan timers
• Delay circuits
• Automotive applications
• Precision timing
• Domestic appliances.

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