Diodes Incorporated PI4ULS3V504AZMAEX

Overview

PI4ULS3V504AZMAEX from Diodes Incorporated (acquired Pericom Semiconductor) is a 4-bit bidirectional voltage-level translator for push-pull applications, supporting independent dual supplies (VCCA: 0.85–2.7 V; VCCB: 1.35–3.6 V), 280 Mb/s max data rate at 2.5–3.6 V/1.8–2.7 V, 30 pF capacitive drive, and overvoltage-tolerant I/O/EN pins. It enables logic-level bridging between low-voltage processors (e.g., 1.8 V A-port) and higher-voltage peripherals (e.g., 3.3 V B-port) in portable mobile interfaces.

For engineers reviewing the PI4ULS3V504AZMAEX datasheet, PI4ULS3V504AZMAEX pinout, PI4ULS3V504AZMAEX application, or PI4ULS3V504AZMAEX equivalent, this device is selected for high-speed, directionless level translation where supply sequencing independence, ESD robustness (2 kV system-level), and ultra-low quiescent current (<1.5 µA) are critical in space-constrained portable designs.

Technical Context

The PI4ULS3V504AZMAEX implements auto-sensing bidirectional translation using one-shot detection circuits per channel-eliminating need for external direction control. Each of its four A/B channel pairs operates independently, with input/output roles dynamically determined by signal edge transitions rather than static configuration.

It supports non-preferential power-up sequencing: either VCCA or VCCB may power up first without latch-up risk, and both ports enter high-impedance state if either supply drops to 0 V. The EN pin (referenced to VCCA, OVT-rated to 3.6 V) disables all I/Os into 3-state mode, reducing total supply current to ≤1 µA per rail.

Key Specifications

Pinout & Package

Package: UQFN1.7×2.0 mm, 12-pin, lead-free and RoHS-compliant (ZMAEX = tape-and-reel, green package).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar bidirectional level translation applications.

Compared with TXS0104E and SN74AVC4T245, the PI4ULS3V504AZMAEX uniquely delivers 280 Mb/s auto-sensing translation with unrestricted VCCA/VCCB ratio, power-off safety, and OVT-enabling robustness-making it the sole fit for next-gen mobile high-speed, mixed-voltage, and zero-footprint interconnects.

Availability

PI4ULS3V504AZMAEX is available at Aetrix Electronics and suitable for mobile phone baseband–RF interfaces, tablet display timing links, wearable sensor hub communications, and portable medical device battery monitoring requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for PI4ULS3V504AZMAEX 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 2017 and integrates its high-performance interface solutions-including level translators, USB switches, and PCIe redrivers-into broad analog and mixed-signal portfolios.

The PI4ULS3V504AZMAEX belongs to Pericom's ULS (Ultra-Low Skew) translator family, engineered specifically for high-speed, space-constrained portable electronics where supply independence, ESD resilience, and zero-direction-control operation are mandatory.

FAQ

What is the minimum VCCA voltage at which PI4ULS3V504AZMAEX guarantees valid logic thresholds?

The device guarantees VIH ≥ 0.75×VCCA and VIL ≤ 0.25×VCCA when VCCA < 1.0 V, and 2/3×VCCA and 1/3×VCCA respectively for VCCA ≥ 1.0 V. Valid operation starts at VCCA = 0.85 V, confirmed across −40°C to +85°C with production-tested DC specs.

Can PI4ULS3V504AZMAEX translate between 0.9 V and 3.3 V rails without external components?

Yes. With VCCA = 0.9 V and VCCB = 3.3 V, the device meets all AC/DC specifications: VOHA ≥ 0.81 V (0.9×VCCA), VOLB ≤ 0.2 V, tPD ≤ 35 ns, and MDR ≥ 133 Mb/s. No pull-ups, resistors, or direction logic are needed-verified in Pericom's PT0491 application note.

How does the EN pin behave when VCCA is unpowered but VCCB is active?

When VCCA = 0 V, the EN pin is un-biased and the internal circuitry forces all I/Os into high-impedance state regardless of EN voltage-ensuring no back-drive or contention on the B-side bus. This power-off protection is guaranteed per datasheet Section 8.

Is PI4ULS3V504AZMAEX compatible with open-drain buses like I²C?

No. It is designed exclusively for push-pull applications. Its auto-sensing architecture relies on active drive capability in both directions; open-drain signals lack the rising-edge slew rate needed for reliable one-shot detection. Use TXS0108E or PCA9306 for I²C.