SAA1305TN1,118

INTEGRATED CIRCUITS DATA SHEET SAA1305T On/off logic IC Product specication 2004 Jan 15 Supersedes data of 1998 Sep 04Philips Semiconductors Product specication On/off logic IC SAA1305T FEATURES 8 accurate Schmitt trigger inputs with clamp circuits Very low quiescent current Reset generator circuit Changed information output The SAA1305T can replace an existing on/off logic built-up On/off output to control a regulator IC which supplies the with discrete components. microcontroller The SAA1305T contains 8 inputs with accurate Schmitt 32.768 kHz RC oscillator and/or a 32.768 kHz crystal triggers and clamp circuits. The main function of this IC is oscillator an intelligent I/O expander with 2 modes of operation: No delayed reset needed (start-up behaviour oscillator 1. Normal I/O expander: the microcontroller (master) is fixed by internal logic) running and the SAA1305T acts like a slave. Watchdog timer function 2. Sleep mode of the total application: the microcontroller Blinking LED oscillator with drive circuit for LED is stopped and the SAA1305T acts like a master. Watch function. During an event, the microcontroller is awakened. The communication with the IC is performed via the GENERAL DESCRIPTION 2 I C-bus (400 kHz). Extra functions of the SAA1305T are: The SAA1305T is an on/off logic IC, intended for use in car LED blinker circuit radios to interface between a microcontroller and various One-day watch input signals such as ignition, low supply detection, on/off Watchdog timer. key and external control signals. QUICK REFERENCE DATA SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT V supply voltage operating 4.5 5.0 5.5 V DD I quiescent supply current V = 5 V standby mode - 130 200 A q DD f maximum SCL clock frequency -- 400 kHz SCL(max) T virtual junction temperature -- 150 C vj ORDERING INFORMATION PACKAGE TYPE NUMBER NAME DESCRIPTION VERSION SAA1305T SO24 plastic small outline package 24 leads body width 7.5 mm SOT137-1 2004 Jan 15 2