Diodes Incorporated PI4IOE5V9570UEX

Overview

PI4IOE5V9570UEX from Diodes Incorporated (acquired Pericom) is a 4-bit I²C-bus general-purpose output expander with push-pull latched outputs, 1 MHz I²C interface, 25 mA per output drive capability, and operation from 2.3 V to 5.5 V. It serves as a compact GPIO extension for low-voltage microcontrollers in space-constrained mobile and portable electronics.

For engineers reviewing the PI4IOE5V9570UEX datasheet, PI4IOE5V9570UEX pinout, PI4IOE5V9570UEX application, or PI4IOE5V9570UEX equivalent, key selection criteria include I²C bus speed compatibility (1 MHz), output current rating (25 mA per pin), standby current (≤10 µA at 5.5 V), package footprint (UQFN-8, 1.6×1.6 mm), and software reset functionality via General Call address 0x00 + command byte 0x06.

Technical Context

The PI4IOE5V9570UEX implements a fixed-function 4-bit parallel output expander with no input capability-ports P0–P3 are strictly push-pull outputs. Its I²C interface supports Standard-mode (100 kHz), Fast-mode (400 kHz), and Fast-mode Plus (1 MHz), with SDA sink capability up to 30 mA into 4000 pF load.

Internal Power-On Reset (POR) triggers at VPOR = 1.16–1.41 V, and software reset is initiated via I²C General Call address 0x00 followed by data byte 0x06. All outputs default HIGH at power-up, and port state is readable back on I²C read cycles-though pins remain output-only.

Key Specifications

Pinout & Package

PI4IOE5V9570UEX is packaged in an 8-pin UQFN (1.6 × 1.6 mm, 0.4 mm pitch) with wettable flanks, optimized for automated optical inspection and high-density PCB layouts.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 4-bit I²C output expander applications.

Compared with TCA6408A and PCA9534A, PI4IOE5V9570UEX uniquely delivers 1 MHz I²C, push-pull 25 mA outputs, and software reset in a 1.6×1.6 mm UQFN-making it optimal for space- and speed-constrained LED and actuator control where simplicity and low quiescent power are mandatory.

Availability

PI4IOE5V9570UEX is available at Aetrix Electronics and suitable for smartphone front panel control, wearable device status indication, and industrial handheld scanner UI requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for PI4IOE5V9570UEX 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 acquired Pericom Semiconductor in 2016 and integrates its high-performance interface and timing solutions into a broad portfolio of analog and mixed-signal ICs serving computing, consumer, and industrial markets.

The PI4IOE5V9570UEX belongs to Diodes' legacy Pericom I/O expander product line, designed specifically for low-voltage, low-power, space-constrained GPIO expansion in portable and battery-operated electronics.

FAQ

Does PI4IOE5V9570UEX support input functionality on its I/O pins?

No. The PI4IOE5V9570UEX provides only 4-bit general-purpose outputs (P0–P3). Its ports are strictly push-pull outputs with no input or bidirectional capability. Reads from the device return the current logic state at the pins but do not configure them as inputs-external signals applied to outputs must be limited to avoid contention with internal drivers.

What is the maximum total output current allowed across all four pins?

The datasheet specifies a total package current limit of 100 mA for continuous operation. While each pin supports up to 25 mA, simultaneous full-load operation on all four pins (100 mA) is permitted only if thermal conditions allow-derating is required above ambient temperatures of 60°C. Internal busing limits enforce this aggregate cap regardless of individual pin ratings.

Can PI4IOE5V9570UEX operate reliably at 1.8 V supply?

No. The absolute minimum supply voltage is 2.3 V, as confirmed by VPOR (1.16–1.41 V) and static characteristics testing down to 2.3 V. Operation below 2.3 V risks incomplete power-on reset, undefined I/O states, and noncompliant I²C timing-1.8 V logic systems require level-shifting or alternative expanders rated for that rail.

Is the UQFN-8 package of PI4IOE5V9570UEX lead-free and RoHS compliant?

Yes. The "E" suffix in PI4IOE5V9570UEX denotes Pb-free and green (halogen-free) construction per JEDEC J-STD-609. The UQFN-8 package uses matte tin terminations and complies with EU RoHS Directive 2011/65/EU and China RoHS II, with full material declarations available upon request.