First automotive-compliant dual power rail I2C bus GPIO expanders

June 03, 2021 // By Jean-Pierre Joosting
First automotive-compliant dual power rail I2C bus GPIO expanders
The automotive-compliant, AEC-Q100 Grade 2 qualified GPIO devices improve system design and flexibility, while cutting BOM cost.

Diodes Incorporated has announced 16-bit PI4IOE5V6416Q and 34-bit PI4IOE5V6534Q bidirectional voltage-level translation general-purpose I/O (GPIO) expanders for automotive applications. Representing an industry first for the automotive industry, the automotive-compliant, AEC-Q100 Grade 2 qualified devices with dual voltage rail provide enhanced programmable I/O for next-generation low voltage microprocessors and microcontrollers via the I2C interface.

The new devices provide engineers with a simple solution when additional I/Os are needed while keeping interconnections to — for example, in ADAS, telematics, and infotainment. Removing the need for an external voltage-level translator simplifies the design of new ADAS and telematics systems, and reduces BOM cost.

Both devices operate from 1.65 V to 5.5 V on the GPIO port side. On the SCL/SDA side (I2C interface), the PI4IOE5V6416Q operates from 1.65 V to 5.5 V and the PI4IOE5V6534Q from 0.8 V to 3.6 V. This dual power rail allows the devices to interface with next-generation low-power microchips on the SCL/SDA side. The expanders offer an exceptionally low standby current consumption of 1.5 µA at 5 V and 1 µA at 3.3 V for the PI4IOE5V6416Q and 2 µA at 3.3 V for the PI4IOE5V6434Q.

Each 16- or 34-bit GPIO on these devices is configurable, and each port features a programmable pull-up or -down resistor and a programmable output current. Unlike many I/O expanders, the PI4IOE5V6416Q and PI4IOE5V6534Q also provide programmable open-drain outputs as part of the enhanced I/O features. The devices have an interrupt masking feature, enabling the designer to mask the interrupt from an individual GPIO port and initiate a system-level action.

The 16-bit PI4IOE5V6416Q is packaged in a 24-pin TSSOP, and 34-bit PI4IOE5V6534Q is available in the W-QFN4565-46 package. Both devices support PPAP documentation and are manufactured in IATF 16949 certified facilities. The unit price for the 16-bit PI4IOE5V6416Q is $1.80 in 3,000 piece quantities and $2.40 for the 34-bit PI4IOE5V6534Q in 3,500 piece quantities.

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