PI4IOE5V6416RQ

Description

The PI4IOE5V6416RQ is a 16-bit general-purpose I/O expander that provides remote I/O expansion for most microcontroller families via the PC-bus interface.

The device provides a simple solution when additional I/Os are needed while keeping interconnections to a minimum; such as in sensors, push buttons, keypads, and battery-powered mobile applications for interfacing.

The PI4IOE5V6416RQ can operate from 1.65V to 5.5V on the GPIO-port side and 1.65V to 5.5V on the SDA/SCL side. This allows the PI4IOE5V6416RQ to interface with next-generation microprocessors and microcontrollers on the SDA/SCL side, where supply levels are dropping down to conserve power.

The bidirectional voltage-level translation in the PHIOFSV6416RQ is provided through V_{DD(I2C_bus)}. V_{DD(I2C_bus)} should be connected to the V_DD of the external SCL/SDA lines. The voltage level on the GPIO-port of the PI4IOE5V6416RQ determined by V_DD(P).

At power on, the I/Os are configured as inputs; however, the system master can enable the I/Os as either inputs or outputs by writing to the I/O direction bits. The data for each input or output is kept in the corresponding Input or Output register. All registers can be read by the system master.

The PI4IOE5V6416RQ has an open-drain interrupt INT output pin that goes LOW when the input state of a GPIO-port changes from the input-state default register value. The device also has an interrupt masking feature by which the user can mask the interrupt from an individual GPIO-port

The power-on reset sets the registers to their default values and initializes the device state machine. In the PI4IOE5V6416RQ however, only the device state machine is initialized by the RESET pin and the internal general-purpose registers remain unchanged. Using RESET pin will only reset the I²C-bus

interface for the master to regain access the I²C-bus when the bus is getting struck with SDA pin staying LOW. This allows the I/O pins to retain their last configured state so that they can keep any lines in their previously defined state and not cause system errors while the I²C-bus is being restored. The INT state will not be clear by the RESET pin.

Feature(s)

• Operation power supply voltage from 1.65V to 5.5V
• Allows bidirectional voltage-level translation and GPIO expansion between:
  • 8/2.5/3.3/5V SCL/SDA and 1.8/2.5/3.3/5V Port
• Low standby current consumption:
  • 15µA typical at 5V V_DD
  • 1uA typical at 3.3V V_DD
• 400kHz I²C-bus interface
• Compliant with the I²C -bus fast and standard modes
• Programmable push-pull/open-drain output stages
• Programmable output drive strength and pull-up/down resistor
• Power-on reset all register contents to default
• Active LOW open-drain interrupt output
• Active LOW reset input to reset I²C bus only while register contents remain unchanged
• Latch-up tested (exceeds 100mA)
• Support AEC-Q100 (Grade 2)
• Packaging (Pb-free & Green):
  • 24-Pin TSSOP (L)
• Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)
• Halogen and Antimony Free. "Green" Device (Note 3)
• The PI4IOE5V6416RQ is suitable for automotive applications requiring specific change control, the part is AEC-Q100 qualified, PPAP capable, and manufactured in IATF 16949 certified facilities. https://www.diodes.com/quality/product-definitions