40-bit I2C-bus Advanced I/O Expander with Interrupt, Reset and Output Enable in TSSOP56 package

The PCA9698 provides 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 25 mA with a total package load of 1 A to allow

direct driving of 40 LEDs. Any of the 40 I/O ports can be configured as an input or

output. The PCA9698 is the first GPIO device in a new Fast-mode Plus (Fm+) family.

Fm+ devices offer higher frequency (up to 1 MHz) and longer, more densely populated bus

operation (up to 4000 pF). The device is fully configurable: output ports can be programmed to be totem-pole or open-drain and logic states can change at either the Acknowledge (bank change) or the Stop Command (global change), each input port can be masked to prevent it from generating interrupts when its state changes, I/O data logic state can be inverted when read by the system controller. An open-drain interrupt output pin (INT) 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 pin (OE) 3-states any I/O selected as output

and can be used as an input signal to blink or dim LEDs (PWM with frequency > 80 Hz

and change duty cycle). A 'GPIO All Call' command allows to program multiple

Advanced GPIOs at the same time even if they have different I²C-bus addresses. This

allows optimal code programming when more than one device needs to be programmed with

the same instruction or if all outputs need to be turned on or off at the same time (for

example, LED test). The Device ID, hard coded in the PCA9698, allows the system

controller to read manufacturer, part type and revision information. The SMBus Alert

feature allows the SMBALERT pins of multiple devices with this

feature to be connected together to form a wired-AND signal and to be used in

conjunction with the SMBus Alert Response Address. The internal Power-On Reset

(POR) or hardware reset pin (RESET) initializes the 40 I/Os as

inputs. Three address select pins configure one of 64 target addresses. The PCA9698

is available in 56-pin TSSOP and HVQFN packages and is specified over the -40 °C to +85 °C industrial temperature range.