Diodes Incorporated PI4IOE5V6416Q2LEX

Overview

PI4IOE5V6416Q from Diodes Incorporated is a 16-bit I²C-bus I/O expander with bidirectional voltage-level translation across 1.65 V–5.5 V domains, programmable push-pull/open-drain outputs, active-low interrupt and reset pins, and AEC-Q100 Grade 2 qualification - used in automotive body control modules to interface microcontrollers with door sensors, seat switches, and LED status indicators while minimizing PCB interconnects.

For engineers reviewing the PI4IOE5V6416Q datasheet, PI4IOE5V6416Q pinout, PI4IOE5V6416Q application, or PI4IOE5V6416Q equivalent, this device supports dual-supply I²C interfacing (V_{DD(I2C_bus)} and V_DD(P)), per-pin drive strength configuration (0.25×–1×), interrupt masking, and latch-enabled GPIO state capture - critical for low-power, fault-tolerant automotive I/O expansion.

Technical Context

The PI4IOE5V6416Q implements a register-mapped I²C slave interface compliant with Standard (100 kHz) and Fast (400 kHz) modes, supporting 24-bit address space via ADDR pin (two selectable slave addresses). Its internal architecture includes separate input/output/polarity/configuration registers for two 8-bit ports (P0 and P1), with independent control of output drive strength (via CCx registers) and pull-up/down enable/selection (via 46h–49h registers).

It features hardware power-on reset (VPOR = 1.1–1.4 V), active-low open-drain INT output synchronized to GPIO state changes, and configurable input latching (L0/L1 registers) that determines whether interrupts persist until register read - enabling robust edge detection in noisy automotive environments without host polling overhead.

Key Specifications

Pinout & Package

Package: 24-pin TSSOP (Lead-free, RoHS-compliant, halogen- and antimony-free "Green" construction).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar I/O expander applications.

Compared with TCA6424A and PCA9555D, the PI4IOE5V6416Q uniquely combines AEC-Q100 Grade 2 qualification, per-pin drive strength and latching control, and true dual-supply voltage translation - making it the only option among the three qualified for safety-critical automotive I/O expansion with minimal external components.

Availability

PI4IOE5V6416Q is available at Aetrix Electronics and suitable for automotive body control modules, industrial HMI interfaces, smart rearview mirror displays, and EV battery management system monitoring requiring stable component supply, long-term lifecycle assurance, and PPAP-ready documentation.

Supply support for PI4IOE5V6416Q includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Diodes Incorporated is a global semiconductor company specializing in discrete, analog, and mixed-signal ICs, with manufacturing certified to IATF 16949 and quality systems aligned with AEC-Q100 for automotive-grade components.

The PI4IOE5V6416Q belongs to Diodes' automotive-qualified I/O expander product line, designed specifically to replace mechanical wiring harnesses with scalable, software-configurable GPIO expansion in harsh-environment vehicle subsystems.

FAQ

What is the minimum V_{DD(I2C_bus)} required for reliable 400 kHz I²C operation?

The datasheet specifies V_{DD(I2C_bus)} ≥ 1.65 V for full 400 kHz Fast Mode compliance. At 1.65 V, t_LOW and t_HIGH meet minimum timing (1.3 μs and 0.6 μs respectively), and VOL/VIL thresholds remain valid. Operation below 1.65 V risks setup/hold violations and NACK generation - confirmed by DS42666 Rev 2-2 Section 6.2.

Can the PI4IOE5V6416Q drive 5 V LEDs directly from its GPIO pins?

Yes - when V_DD(P) = 5 V and output configured as push-pull, the device delivers up to 10 mA per pin (CCx register = 11b), sufficient for standard 5 V indicator LEDs (typically 2–5 mA). The VOL remains ≤0.2 V at 10 mA, ensuring adequate forward voltage margin. Do not exceed 50 mA total sink/source per V_DD(P) or VSS pin.

How does the input latch feature affect interrupt behavior on GPIO state transitions?

When input latch is enabled (L0/L1 bit = 1), a GPIO transition captures the new state into the Input Port register and holds the INT signal active until the register is read - even if the pin returns to its original state. When disabled (L0/L1 = 0), INT pulses only while the pin is in the changed state and clears immediately upon return - verified in Functional Description Section 7.6 and Table 14–15.

Is the ADDR pin the only method to configure the I²C slave address?

Yes - ADDR is the sole hardware address pin; it selects between 0x20 (ADDR = GND) and 0x21 (ADDR = V_DD(P)). No software-addressable alternatives exist. This two-address limit is intentional for bus collision avoidance in multi-device automotive networks - confirmed in Figure 3 and Section 7.1a of DS42666.