PCA9673BQ,118 Datasheet

Interface - I/O Expanders


The PCA9673BQ,118 provides general purpose remote I/O expansion for most microcontrollerfamilies via the two-line bidirectional bus (I2C-bus) and is a part of the Fast-mode Plusfamily.The PCA9673 is a drop in upgrade for the PCF8575 providing higher Fast-mode Plus(Fm+) I2C-bus speeds (1 MHz versus 400 kHz) so that the output can support PWMdimming of LEDs, higher I2C-bus drive (30 mA versus 3 mA) so that many more devicescan be on the bus without the need for bus buffers, higher total package sink capacity(400 mA versus 100 mA) that supports having all 25 mA LEDs on at the same time andmore device addresses (16 versus 8) are available to allow many more devices on the buswithout address conflicts.The difference between the PCA9673 and the PCF8575 is that the A2 address pin isreplaced by a RESET input on the PCA9673.The device consists of a 16-bit quasi-bidirectional port and an I2C-bus interface. ThePCA9673 has a low current consumption and includes latched outputs with 25 mA highcurrent drive capability for directly driving LEDs.It also possesses an interrupt line (INT) which can be connected to the interrupt logic ofthe microcontroller. By sending an interrupt signal on this line, the remote I/O can informthe microcontroller if there is incoming data on its ports without having to communicate viathe I2C-bus.The internal Power-On Reset (POR), hardware reset pin (RESET) or software resetsequence initializes the I/Os as inputs. PCA9673BQ,118 Features • 1 MHz I2C-bus interface• Compliant with the I2C-bus Fast and Standard modes• SDA with 30 mA sink capability for 4000 pF buses• 2.3 V to 5.5 V operation with 5.5 V tolerant I/Os• 16-bit remote I/O pins that default to inputs at power-up• Latched outputs with 25 mA sink capability for directly driving LEDs• Total package sink capability of 400 mA• Active LOW open-drain interrupt output• 16 programmable slave addresses using 2 address pins• Readable device ID (manufacturer, device type, and revision)• Low standby current• -40 °C to +85 °C operation• ESD protection exceeds 2000 V HBM per JESD22-A114, 200 V MM perJESD22-A115, and 1000 V CDM per JESD22-C101• Latch-up testing is done to JEDEC standard JESD78 which exceeds 100 mA• Packages offered: SO24, SSOP24, QSOP24, TSSOP24, HVQFN24, DHVQFN24 PCA9673BQ,118 Applications • LED signs and displays• Servers• Industrial control• Medical equipment• PLCs• Cellular telephones• Gaming machines• Instrumentation and test measurement


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Manufacturer information


Diodes Incorporated is a leading global manufacturer and supplier of high-quality application specific standard products within the broad discrete, logic, analog and mixed-signal semiconductor markets. Diodes serves the consumer electronics, computing, communications, industrial, and automotive markets.
Diodes’ products include diodes, rectifiers, transistors, MOSFETs, protection devices, function-specific arrays, single gate logic, amplifiers and comparators, Hall-effect and temperature sensors, power management devices, including LED drivers, AC-DC converters and controllers, DC-DC switching and linear voltage regulators, and voltage references along with special function devices, such as USB power switches, load switches, voltage supervisors, and motor controllers.
Diodes’ corporate headquarters and Americas’ sales office are located in Plano, Texas and Milpitas, California. Design, marketing, and engineering centers are located in Plano; Milpitas; Taipei, Taiwan; Taoyuan City, Taiwan; Zhubei City, Taiwan; Manchester, England; and Neuhaus, Germany. Diodes’ wafer fabrication facilities are located in Manchester and Shanghai, China. Diodes has assembly and test facilities located in Shanghai, Jinan, Chengdu, and Yangzhou, China, as well as in Hong Kong, Neuhaus and Taipei. Additional engineering, sales, warehouse, and logistics offices are located in Taipei; Hong Kong; Manchester; Shanghai; Shenzhen, China; Seongnam-si, South Korea; and Munich, Germany, with support offices throughout the world.

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