Diodes Incorporated PI4IOE5V6416LEX

Overview

PI4IOE5V6416LEX from Diodes Incorporated is a low-voltage translating 16-bit I²C-bus I/O expander with dual 8-bit GPIO ports (P0_0–P0_7 and P1_0–P1_7), independent 1.65V–5.5V I²C-bus and port supply rails, programmable output drive strength (2.5/5/7.5/10 mA), and active-low open-drain interrupt output. It operates across –40°C to +85°C and supports Fast Mode I²C up to 400 kHz - used in industrial control panels for expanding microcontroller GPIOs while maintaining level translation between disparate voltage domains.

For engineers reviewing the PI4IOE5V6416LEX datasheet, PI4IOE5V6416LEX pinout, PI4IOE5V6416LEX application, or PI4IOE5V6416LEX equivalent, key selection considerations include its dual-supply I²C interface compatibility, per-pin configurable pull-up/pull-down enable and selection, interrupt masking per I/O, and power-on reset behavior with 1.1–1.4 V threshold.

Technical Context

The PI4IOE5V6416LEX implements an I²C slave interface with 7-bit address (configurable via ADDR pins) and 24 internal registers controlling input latching, polarity inversion, port configuration, drive strength, interrupt masking/status, and pull-up/pull-down settings. All 16 I/Os default to high-impedance inputs at power-on reset.

It features two independent supply domains: VDD(I²C-bus) (1.65–5.5 V) for SCL/SDA/RESET logic and VDD(P) (1.65–5.5 V) for GPIO port operation - enabling bidirectional voltage translation without external level shifters. The INT pin asserts low on any enabled I/O state change and supports edge-triggered interrupt handling via status registers 4Ch/4Dh.

Key Specifications

Pinout & Package

PI4IOE5V6416LEX is packaged in a 24-pin TSSOP (JEDEC MO-153, 7.8 mm × 4.4 mm) with 0.65 mm pitch. Pin functions are validated per Diodes DS40821 Rev 4-2.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar I²C GPIO expander applications.

Compared with TCA6424ARGJR and PCA9555DWR, the PI4IOE5V6416LEX uniquely supports independent I²C and port supplies, per-pin drive strength tuning, and integrated pull-up/pull-down enable+selection - making it optimal for compact, multi-voltage embedded systems requiring minimal external components and fine-grained I/O control.

Availability

PI4IOE5V6416LEX is available at Aetrix Electronics and suitable for industrial HMI panels, smart energy meters, and automotive body control modules requiring stable component supply, long-term lifecycle support, and RoHS 3-compliant sourcing.

Supply support for PI4IOE5V6416LEX 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 analog ICs, specializing in high-reliability, low-power, and small-signal solutions for industrial, computing, and consumer markets.

The PI4IOE5V6416LEX belongs to Diodes' PI4IOE family of I²C GPIO expanders, designed specifically for space-constrained, multi-rail embedded systems needing robust voltage translation, low quiescent current, and register-level I/O configurability.

FAQ

What are the absolute maximum ratings for VDD(I²C) and VDD(P)?

The absolute maximum rating for both VDD(I²C) and VDD(P) is –0.5 V to +6.0 V. Exceeding these limits may cause permanent damage. Recommended operating range is 1.65 V to 5.5 V for both supplies, with full functionality guaranteed across –40°C to +85°C ambient temperature.

How does the power-on reset (POR) circuit behave?

The POR circuit triggers when VDD(P) rises above 1.1–1.4 V (rising threshold) or falls below 0.5 V (falling threshold). Upon valid POR, all registers reset to their default values and all 16 I/Os enter high-impedance input mode. Reset recovery time is 200 ns, and minimum reset pulse width is 30 ns.

Can the INT pin be used in wired-OR configurations with other interrupt sources?

Yes - the INT pin is an active-low open-drain output rated for 3 mA sink current at VOL ≤ 0.4 V, and is 5.5 V tolerant. It can be directly connected to other open-drain interrupt lines with a shared pull-up resistor, enabling centralized interrupt arbitration in multi-peripheral systems.

Is there internal ESD protection, and what is its rating?

The PI4IOE5V6416LEX includes built-in ESD protection rated at ±2 kV per Human Body Model (HBM) on all pins. This meets standard board-level handling requirements but does not replace system-level ESD design practices such as TVS diodes on exposed connectors or high-speed traces.