| Conductive Type: | Unipolar Integrated Circuit |
|---|---|
| Integration: | LSI |
| Technics: | Thick Film IC |
| D/C: | 17+ |
| Package: | TSSOP-24 |
| Quality: | Genuine New Original |
| Customization: |
|---|
Suppliers with verified business licenses
Audited Supplier PCA9535PW,188: I2C and SMBus Low Power I/O Expander 24-Pin TSSOP T/R
Package: TSSOP-24
Mfr. Part#: PCA9535PW,188
Datasheet: 
(e-mail or chat us for PDF file)
ROHS Status:
Quality: 100% Original
Warranty: 180 days
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Product Status
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Active
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Number of I/O
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8
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Interface
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I²C, SMBus
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Interrupt Output
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No
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Features
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POR
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Output Type
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Open Drain, Push-Pull
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Current - Output Source/Sink
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10mA, 20mA
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Clock Frequency
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400 kHz
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Voltage - Supply
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2.3V ~ 5.5V
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Operating Temperature
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-40°C ~ 85°C
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Mounting Type
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Surface Mount
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Package / Case
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16-TSSOP (0.173", 4.40mm Width)
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Supplier Device Package
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16-TSSOP
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Base Product Number
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PCA9557
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The PCA9535 and PCA9535C are 24-pin CMOS devices that provide 16 bits of General Purpose parallel Input/Output (GPIO) expansion for I²C-bus/SMBus applications and was developed to enhance the family of I²C-bus I/O expanders. The improvements include higher drive capability, 5 V I/O tolerance, lower supply current, individual I/O configuration, and smaller packaging. I/O expanders provide a simple solution when additional I/O is needed for ACPI power switches, sensors, push buttons, LEDs, fans, etc. The PCA9535 and PCA9535C consist of two 8-bit Configuration (Input or Output selection), Input, Output and Polarity Inversion (active HIGH or active LOW operation) registers. The system master can enable the I/Os as either inputs or outputs by writing to the I/O configuration bits. The data for each input or output is kept in the corresponding Input or Output register. The polarity of the read register can be inverted with the Polarity Inversion register. All registers can be read by the system master. Although pin-to-pin and I²C-bus address compatible with the PCF8575, software changes are required due to the enhancements and are discussed in Application Note AN469. The PCA9535 is identical to the PCA9555 except for the removal of the internal I/O pull-up resistor which greatly reduces power consumption when the I/Os are held LOW. The PCA9535C is identical to the PCA9535 except that all the I/O pins are high-impedance open-drain outputs. The PCA9535 and PCA9535C open-drain interrupt output is activated when any input state differs from its corresponding Input Port register state and is used to indicate to the system master 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 (A0, A1, A2) vary the fixed I²C-bus address and allow up to eight devices to share the same I²C-bus/SMBus. The fixed I²C-bus address of the PCA9535 and PCA9535C are the same as the PCA9555 allowing up to eight of these devices in any combination to share the same I²C-bus/SMBus.
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