Overview
●The PCA9505/PCA9506 provide 40-bit parallel input/output (I/O) port expansion for I²C-bus applications organized in 5 banks of 8 I/Os. At 5 V supply voltage, the outputs are capable of sourcing 10 mA and sinking 15 mA with a total package load of 600 mA to allow direct driving of 40 LEDs. Any of the 40 I/O ports can be configured as an input or output. Output ports are totem-pole and their logic state changes at the Acknowledge (bank change). The PCA9505 is identical to the PCA9506 except that it includes 100 kΩ internal pull-up resistors on all the I/Os. The PCA9506 does not include the internal pull-ups on the I/Os to reduce power consumption when used as outputs or when the input is driven by a push-pull driver.
●The device can be configured to have each input port to be masked in order to prevent it from generating interrupts when its state changes and to have the I/O data logic state to be inverted when read by the system master.
●An open-drain interrupt (INT) output pin allows monitoring of the input pins and is asserted each time a change occurs in one or several input ports (unless masked).
●The Output Enable (OE) pin 3-states any I/O selected as an output and can be used as an input signal to blink or dim LEDs (PWM with frequency > 80 Hz and change duty cycle).
●The internal Power-On Reset (POR) or hardware reset (RESET) pin initializes the 40 I/Os as inputs. Three address select pins configure one of 8 slave addresses.
●The PCA9506 is available in 56-pin TSSOP and HVQFN packages, while the PCA9505 is available only in a TSSOP package. They are both specified over the -40 Cel to +85 Cel industrial temperature range.
●MoreLess
●## Features
● Standard mode (100 kHz) and Fast mode (400 kHz) compatible I²C-bus serial interface
● 2.3 V to 5.5 V operation with 5.5 V tolerant I/Os
● 40 configurable I/O pins that default to inputs at power-up
● PCA9505 includes 100 kΩ internal pull-up resistors on all the I/Os
● Outputs:
● Totem-pole (10 mA source, 15 mA sink) with controlled edge rate output structure
● Active LOW output enable (OE) input pin 3-states all outputs
● Output state change on Acknowledge
● Open-drain active LOW interrupt (INT) output pin allows monitoring of logic level change of pins programmed as inputs
● Inputs:
● Programmable Interrupt Mask Control for input pins that do not require an interrupt when their states change
● Polarity Inversion register allows inversion of the polarity of the I/O pins when read
● Active LOW reset (RESET) input pin resets device to power-up default state
● 3 programmable address pins allowing 8 devices on the same bus
● Designed for live insertion
● Minimize line disturbance (IOFF and power-up 3-state)
● Signal transient rejection (50 ns noise filter and robust I²C-bus state machine)
● Low standby current
● -40 Cel to +85 Cel operation
● ESD protection exceeds 2000 V HBM per JESD22-A114, 200 V MM per JESD22-A115, and 1000 V CDM per JESD22-C101
● Latch-up testing is done to JEDEC Standard JESD78, which exceeds 100 mA
● Offered in TSSOP56 (PCA9505, PCA9506) and HVQFN56 (PCA9506) packages
●## Target Applications
● Servers
● RAID systems
● Industrial control
● Medical equipment
● PLCs
● Cell phones
● Gaming machines
● Instrumentation and test measurement
●## Features
