General Purpose MCU

Application Specific MCU

Application Specific IC

Discontinued Products



The AL5524 includes 16 bits of General Purpose parallel Input /Output expansion through the I2C−bus. The AL5524 consists of two 8−bit configuration (Input or Output selection). By power on reset , all I/Os set to inputs. All I/O can be selected by either input or output selection register bit. The data for each Input or Output is kept in its corresponding Input or Output register. The Polarity Inversion register may be used to invert the polarity of the read register. All registers can be read by the system controller. The AL5524 provides an open−drain interrupt output which is activated when any input state differs from its corresponding input port register state. The interrupt output is used to indicate to the system controller that an input state has changed. The power−on reset sets the registers to their default values and initializes the device state machine. Three hardware pins (ADD0, ADD1, ADD2) are used to configure the I2C−bus slave address of the device. Up to 8 devices are allowed to share the same I2C−bus.

Block diagram

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Specification for AL5524
Item Value
Op. Volt. [V] 2.0~5.5
GPIO 16-GPIO (RA Port 8, RB Port 8)
Op. Temp. [˚C] -40~85
Package Type 24TSSOP, 16SOPN
Remarks I2C Interface I/O Expander
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Category Title Type Language Version Issue Date Size Download
User's Manual English 1.1 2017-03-15 910.35KB
User's Manual Korean 1.1 2017-03-15 967.25KB
Datasheet English 1.1 2017-03-15 837.54KB
Datasheet Korean 1.1 2017-03-15 886.98KB
Brochure English 1.1 2017-03-15 243.71KB
Schematic English 0.1 2017-03-15 152.9KB