text.skipToContent text.skipToNavigation

Référence fabricant


PCA9555 Series 5.5V 160 mA 400 kHz SMT 16-bit I2C-bus and SMBus I/O Port-SOIC-24

Modèle ECAD:
Nom du fabricant: NXP
Emballage standard:
Product Variant Information section
Code de date: 2331
Product Specification Section
NXP PCA9555D,118 - Caractéristiques techniques
Attributes Table
Interface Type: I2C/SMBus
Clock Frequency-Max: 400kHz
No of I/O Lines: 16
Supply Voltage-Nom: 2.3V to 5.5V
Supply Current: 160mA
Style d'emballage :  SOIC-24
Méthode de montage : Surface Mount
Fonctionnalités et applications

NXP is a leading semiconductor company founded by Philips more than 50 years ago. NXP creates semiconductors, system solutions and software that deliver better sensory experiences in TVs, set-top boxes, identification applications, mobile phones, cars and a wide range of other electronic devices.

The PCA9555 is a 24-pin CMOS device that provides 16 bits of General Purpose parallel Input/Output (GPIO) expansion for I2C-bus/SMBus applications and was developed to enhance the NXP Semiconductors 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 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 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 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 (A0, A1, A2) vary the fixed I22C-bus address and allow up to eight devices to share the same I2C-bus/SMBus. The fixed I2C-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.

The PCA9555D-T is an I/O Expander with I²C, SMBus Interface. It has 16 I/O’s and a frequency clock 400 khz and voltage supply 2.3 V ~ 5.5 V. It is 24-pin and is packaged in a SOIC (7.5mm Width). The PCA9555D-T comes in tape and reel format.

Pricing Section
Stock global :
2 000
d’Allemagne (En ligne seulement):
2 000
Sur commande :Order inventroy details
1 000
Stock d'usine :Stock d'usine :
Délai d'usine :
16 Semaines
Commande minimale :
Multiples de :
1 200,00 $
Prix Internet
1 000
2 000
3 000
4 000
5 000+
Product Variant Information section