PCA9555BS Interface - I/O Expanders I2C/SMBUS 16BIT GPIO Integrated Circuits ICs
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Integrated Circuits ICs
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Condition:
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Warranty:
365days
Lead Free:
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Lead Times:
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Package:
HVQFN-24
Mounting Style:
SMD/SMT
Highlight:
PCA9555BS
,PCA9555BS Integrated Circuits ICs
,Interface Integrated Circuits ICs
Introduction
PCA9555BS Interface - I/O Expanders I2C/SMBUS 16BIT GPIO Integrated Circuits ICs
| N-X-P | |
| Product Category: | Interface - I/O Expanders |
| RoHS: | Details |
| PCA9555 | |
| SMD/SMT | |
| HVQFN-24 | |
| I2C, Serial, SMBus | |
| 16 I/O | |
| With Interrupt | |
| 2.3 V | |
| 5.5 V | |
| 400 kHz | |
| - 40 C | |
| + 85 C | |
| Reel | |
| Cut Tape | |
| MouseReel | |
| Brand: | N-X-P Semiconductors |
| Input Voltage: | 2.3 V to 5.5 V |
| Logic Family: | PCA9555 |
| Operating Supply Current: | 135 uA |
| Operating Supply Voltage: | 2.3 V to 5.5 V |
| Output Current: | 50 mA |
| Output Type: | Open Drain |
| Pd - Power Dissipation: | 200 mW |
| Product: | I/O Expanders |
| Product Type: | I/O Expanders |
| Subcategory: | Interface ICs |
| Type: | I/O Expander |
| Part # Aliases: | 935272004118 |
| Unit Weight: | 0.001305 oz |
General description
The PCA9555 is a 24-pin CMOS device that provides 16 bits of General Purpose parallel
Input/Output (GPIO) expansion for I?C-bus/SMBus applications and was developed to
enhance the N-X-P Semiconductors family of I2C-bus /0 expanders. The improvements
include higher drive capability, 5 V l/0 tolerance, lower supply current, individual I/0
configuration, and smaller packaging. I/0 expanders provide a simple solution when
additional I/O is needed for ACPI power switches, sensors, push buttons, LEDs, fans, etc.
The PCA9555 consists 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 l/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 IPC-bus
address compatible with the PCF8575, software changes are required due to the
enhancements, and are discussed in Application Note AN469.
The PCA9555 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 (AO, A1, A2) vary the fixed IPC-bus address and allow up to eight
devices to share the same I2C-bus/SMBus. The fixed 2C-bus address of the PCA9555 is
the same as the PCA9554, allowing up to eight of these devices in any combination to
share the same I2C bus/SMBus.
Features and benefits
■Operating power supply voltage range of2.3 Vto 5.5 V
■5 V tolerant I/Os
■Polarity Inversion register
■Active LOW interrupt output
■Low standby current
■Noise filter on SCL/SDA inputs
■No glitch on power-up
■Internal power-on reset
■16 /0 pins which default to 16 inputs
■0 Hz to 400 kHz clock frequency
■1 ESD protection exceeds 2000 V HBM per JESD22-A114, 200 V MM per
■JESD22-A115, and 1000 V CDM per JESD22-C101
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