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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 delaye...

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SeekIC No. : 004483874 Detail

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 supp...

SAA1305T Data Sheet

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Part Number:
SAA1305T
Supply Ability:
5000

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  • 1~5000
  • Unit Price
  • Negotiable
  • Processing time
  • 15 Days
Total Cost: $ 0.00

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Upload time: 2025/12/26

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Product Details

Description



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.


Pinout

Connection Diagram


Specifications

SYMBOL PARAMETER CONDITIONS MIN. MAX. UNIT
VDD supply voltage operating -0.5 +6.5 V
Iq quiescent supply current VDD = 5 V; standby mode - 200 A
VI(n) input voltage on pins

SDA, SCL, RES, WD and TS

D0 to D7		 fosc = 32 kHz


with 5 k series resistor		 -0.5

-0.5		 +6.5

+17		 V

V
VO(n) output voltage on pins CHI, RP,
ON/OFF and LED		 fosc = 32 kHz -0.5 +6.5 V
fSCL(max) maximum SCL clock frequency   - 400 kHz
Tvj virtual junction temperature   - 150 °C
Tstg storage temperature   -65 +150 °C
Tamb ambient temperature   -40 +85 °C



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.




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