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SAA1305T Datasheet

On/off logic IC

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INTEGRATED CIRCUITS
DATA SHEET
SAA1305T
On/off logic IC
Product specification
Supersedes data of 1998 Sep 04
2004 Jan 15


Panasonic Electronic Components Datasheet

SAA1305T Datasheet

On/off logic IC

No Preview Available !

Philips Semiconductors
On/off logic IC
Product specification
SAA1305T
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.
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.
The SAA1305T contains 8 inputs with accurate Schmitt
triggers and clamp circuits. The main function of this IC is
an intelligent I/O expander with 2 modes of operation:
1. Normal I/O expander: the microcontroller (master) is
running and the SAA1305T acts like a slave.
2. Sleep mode of the total application: the microcontroller
is stopped and the SAA1305T acts like a master.
During an event, the microcontroller is awakened.
The communication with the IC is performed via the
I2C-bus (400 kHz). Extra functions of the SAA1305T are:
LED blinker circuit
One-day watch
Watchdog timer.
QUICK REFERENCE DATA
SYMBOL
VDD
Iq
fSCL(max)
Tvj
PARAMETER
supply voltage
quiescent supply current
maximum SCL clock frequency
virtual junction temperature
CONDITIONS
MIN.
operating
4.5
VDD = 5 V; standby mode
TYP.
5.0
130
MAX. UNIT
5.5 V
200 µA
400 kHz
150 °C
ORDERING INFORMATION
TYPE NUMBER
SAA1305T
NAME
SO24
PACKAGE
DESCRIPTION
plastic small outline package; 24 leads; body width 7.5 mm
VERSION
SOT137-1
2004 Jan 15
2


Part Number SAA1305T
Description On/off logic IC
Maker Panasonic Semiconductor
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