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XR-L556 - Micropower Dual Timer

Description

The XR-L556 dual timer contains two independent micropower timer sections on a monolithic chip.

It is a direct replacement for the conventional 556-type dual timers, for applications requiring very low power dissipation.

Features

  • as timing accuracy and stability. At 5 volt operation, typical power dissipation of the dual-timer circuit is less than 2 mW; and it can operate in excess of 500 hours with only two 300 mA-Hr NiCd batteries. The two timer sections of the circuit have separate controls and outputs, but share common supply and ground terminals. Each output can source up to 100 mA of output current or drive TTL circuits.

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Full PDF Text Transcription

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XR-L556 Micropower Dual Timer GENERAL DESCRIPTION The XR-L556 dual timer contains two independent micropower timer sections on a monolithic chip. It is a direct replacement for the conventional 556-type dual timers, for applications requiring very low power dissipation. Each section of the XR-L556 dual timer is equivalent to Exar's XR-L555 micropower timer. The circuit dissipates only 1/15th of the stand-by power of conventional dual timers and can operate down to 2.5 volts without sacrificing such key features as timing accuracy and stability. At 5 volt operation, typical power dissipation of the dual-timer circuit is less than 2 mW; and it can operate in excess of 500 hours with only two 300 mA-Hr NiCd batteries.
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