Diodes Incorporated PI4IOE5V6534Q2ZLWEX

Overview

PI4IOE5V6534Q from Diodes Incorporated is a 34-bit I²C-bus I/O expander with bidirectional voltage-level translation, supporting 0.8 V to 3.6 V on the I²C side and 1.65 V to 5.5 V on the GPIO port side. It features 5.5 V-tolerant I/Os, 1 MHz Fast-mode Plus I²C interface, AEC-Q100 Grade 2 qualification, and programmable drive strength per pin - enabling use in automotive body control modules interfacing sensors, buttons, and LEDs.

For engineers reviewing the PI4IOE5V6534Q datasheet, PI4IOE5V6534Q pinout, PI4IOE5V6534Q application, or PI4IOE5V6534Q equivalent, key selection considerations include I²C voltage translation range, interrupt masking per bit, latched output capability for direct LED driving, and wettable-flank QFN package compatibility with automated optical inspection.

Technical Context

The device implements a dual-supply architecture: V_DD(I²C) sets SCL/SDA logic levels and enables bidirectional level translation, while V_DD(P) powers the 34 GPIOs and defines their I/O voltage domain. All 34 I/Os support independent configuration as push-pull or open-drain outputs, with per-pin interrupt edge control and mask registers.

It integrates hardware switch debounce (6Dh–6Fh), programmable output drive strength (four levels), input latch retention until register read, and internal 100 kΩ pull-up/pull-down selection. The active-low open-drain INT̅̅̅̅̅ output reports any unmasked input change, with individual interrupt clear and status-read-without-clear functionality.

Key Specifications

Pinout & Package

Package: 46-pin Wettable Flank TQFN (ZLW), 4.5 mm × 6.5 mm, 0.5 mm pitch, exposed thermal pad (VSS, center).

Key Features

Applications

Equivalent & Alternatives

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

Compared with PCA9555DWR and TCA6424ARGJR, the PI4IOE5V6534Q uniquely combines 34-bit expansion, 0.8 V I²C compatibility, AEC-Q100 Grade 2 certification, wettable flank packaging, and per-pin interrupt configurability - making it the only option qualified for safety-critical automotive body electronics with mixed-voltage subsystems.

Availability

PI4IOE5V6534Q is available at Aetrix Electronics and suitable for automotive body control modules, industrial HMI interfaces, smart battery management systems, and interior lighting controllers requiring stable component supply across extended temperature ranges and long product lifecycles.

Supply support for PI4IOE5V6534Q 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 manufacturer of discrete semiconductors and integrated circuits, specializing in high-reliability components for automotive, industrial, and computing markets.

The PI4IOE5V6534Q belongs to Diodes' automotive-qualified I/O expander product line, designed specifically for AEC-Q100-compliant body electronics applications requiring mixed-voltage interoperability, low-power operation, and robust interrupt handling.

FAQ

What is the minimum I²C bus voltage supported by the PI4IOE5V6534Q?

The PI4IOE5V6534Q supports I²C bus operation down to 0.8 V on the SCL/SDA pins, enabling direct interface with next-generation ultra-low-voltage microcontrollers used in automotive domain controllers and battery-powered modules. This is verified in the Recommended Operating Conditions table (V_DD(I²C-bus) min = 0.8 V) and confirmed by functional testing across -40°C to +105°C.

How does the PI4IOE5V6534Q handle voltage-level translation between I²C and GPIO domains?

Voltage-level translation is achieved through dual-supply architecture: V_DD(I²C) sets logic thresholds for SCL/SDA, while V_DD(P) powers the GPIOs. The internal circuitry automatically translates signals bidirectionally - e.g., a 0.9 V I²C master can safely control 5 V-tolerant GPIOs without external translators. This is implemented in silicon and validated per I²C Fast-mode Plus timing specs up to 1 MHz.

Can the PI4IOE5V6534Q drive LEDs directly without external current-limiting resistors?

No - although the device supports latched push-pull outputs capable of sourcing up to 10 mA per pin (at V_DD(P) ≥ 3 V), external current-limiting resistors are mandatory for LED driving to prevent exceeding absolute maximum ratings and ensure consistent brightness. The datasheet specifies max I_OH = 10 mA and max I_OL = 25 mA per I/O, with total device current limited to 500 mA.

Is the PI4IOE5V6534Q compatible with standard I²C protocol analyzers?

Yes - the PI4IOE5V6534Q fully complies with I²C Standard-mode (100 kHz), Fast-mode (400 kHz), and Fast-mode Plus (1 MHz) specifications, including timing parameters (t_LOW, t_HIGH, t_SU;DAT, etc.) and electrical characteristics (V_IL, V_IH, C_io). It responds to standard 7-bit slave addresses (40h–46h) and supports repeated START, STOP, and general call commands, ensuring full visibility and debug capability with commercial I²C protocol analyzers.