Product Description
The PT8A264X is a CMOS LSI chip designed for use in automatic PIR lamp control. It can operate with a 2-wire configuration for triac applications or with a 3-wire configuration for relay applications. The chip is equipped with operational amplifiers, a comparator, timer, a zero crossing detector, control circuit, a voltage regulator, a system oscillator, and an output timing oscillator.

Product Features
• Operating voltage: 5V (Typ.)
• Average supply current: 120µA (Typ.)
• 2 stage op-amp for filter.
• Build-in noise rejection circuit.
• On-chip regulator.
• Adjustable output duration
• Override function.
• ON/AUTO/OFF selectable by MODE pin
• Apply to AC 220V/50Hz and 110V/60Hz.
• Auto-reset if the ZC signal disappears over 3
   seconds
• Output pulse (PT8A2641/5/7) to drive triac or
   output level (PT8A2642/6/8) to drive relay.
• CDS to enable/disable output.
• 40 second warm-up.
• Quick check mode for installation.