GENERAL DESCRIPTION

The SAA1305T is an on/off logic IC, intended for use in car radios to interface between a microcontroller and various input signals such as ignition, low supply detection, on/off key and external control signals. The SAA1305T can replace an existing on/off logic built-up with discrete components.

FEATURES

• 8 accurate Schmitt trigger inputs with clamp circuits

• Very low quiescent current

• Reset generator circuit

• Changed information output

• On/off output to control a regulator IC which supplies the microcontroller

• 32.768 kHz RC oscillator and/or a 32.768 kHz crystal oscillator

• No delayed reset needed (start-up behaviour oscillator

fixed by internal logic)

• Watchdog timer function

• Blinking LED oscillator with drive circuit for LED

• Watch function.