Diodes Incorporated PI4GTL2002UEX

Overview

PI4GTL2002UEX from Diodes Incorporated is a 2-bit bidirectional low-voltage translator IC implementing Gunning Transceiver Logic–Transceiver Voltage Clamp (GTL-TVC) architecture. It enables seamless voltage level translation between 0.8 V and 5.0 V domains without direction control, features ≤1.5 ns max propagation delay, 3.5 Ω typical ON-state resistance, and supports I²C-bus Standard/Fast mode timing in mixed-voltage processor-to-peripheral interfaces.

For engineers reviewing the PI4GTL2002UEX datasheet, PI4GTL2002UEX pinout, PI4GTL2002UEX application, or PI4GTL2002UEX equivalent, this device addresses critical requirements in bidirectional bus interfacing-including voltage domain isolation, ESD-protected signal integrity, hot-insertion capability, and flow-through PCB routing-particularly where legacy 5 V logic must interoperate with sub-1.8 V SoCs or FPGAs.

Technical Context

The PI4GTL2002UEX uses matched NMOS pass transistors (S1/D1 and S2/D2) with shared gate control (GREF) and dedicated reference transistors (SREF/DREF) to enforce precise clamping thresholds. Its GTL-TVC topology eliminates direction pins by dynamically biasing low-side outputs to SREF and high-side outputs to DREF, enabling true bidirectional translation across seven standard voltage rails (0.8 V to 5.0 V).

Propagation delay remains ≤1.4 ns under worst-case conditions (e.g., 2.5 V → 1.5 V translation at 85 °C), while ON-resistance stays ≤5.5 Ω when GREF ≥ 4.5 V-ensuring minimal signal distortion and compatibility with 400 kHz I²C timing budgets. All internal transistors are fabricated identically, guaranteeing <0.1 ns skew between channels and eliminating channel-to-channel mismatch.

Key Specifications

Pinout & Package

PI4GTL2002UEX is packaged in an 8-pin MSOP (Mini Small Outline Package), measuring 3.0 mm × 3.0 mm × 1.1 mm, with exposed pad for thermal enhancement and RoHS-compliant lead-free finish.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TXS0102DCUR and SN74AVC2T244RSWR, the PI4GTL2002UEX uniquely delivers 5 V-tolerant bidirectional translation without direction control or external biasing complexity-making it optimal for I²C, SMBus, and other open-drain bus standards operating across wide voltage ranges.

Availability

PI4GTL2002UEX is available at Aetrix Electronics and suitable for industrial control systems, automotive body electronics, server management buses, and embedded IoT peripherals requiring stable component supply across extended temperature and mixed-voltage environments.

Supply support for PI4GTL2002UEX 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 power management, signal integrity, and connectivity solutions for industrial, computing, and consumer markets.

The PI4GTL2002UEX belongs to Diodes' high-speed logic translation product line, engineered specifically for robust, pin-efficient bridging of heterogeneous voltage domains in real-time communication interfaces such as I²C, SMBus, and GTL buses.

FAQ

What is the minimum recommended pull-up resistor value for S1/S2 when translating from 3.3 V to 1.2 V?

For 3.3 V DREF and 1.2 V SREF with a 15 mA driver sink current, the minimum pull-up resistor on the SREF side is 214 Ω (per datasheet Table on page 10). This ensures the pass transistor remains within its 15 mA current limit, maintaining ≤350 mV voltage drop and preserving logic HIGH margin at the low-voltage side.

Can PI4GTL2002UEX translate between 0.8 V and 5.0 V in both directions simultaneously?

Yes-the device supports simultaneous bidirectional translation: S1/S2 can drive LOW toward D1/D2 while D1/D2 drive LOW toward S1/S2, provided both sides use open-drain topology. The GTL-TVC architecture enforces clamping without contention, verified in functional test conditions across all supported voltage pairs in DS40704 Rev 3-2.

Is PI4GTL2002UEX qualified for automotive applications per AEC-Q100?

No-PI4GTL2002UEX is not AEC-Q100 qualified. Diodes Incorporated explicitly states that automotive-grade variants require separate qualification (e.g., PPAP, IATF 16949 manufacturing), and this MSOP-packaged part is designated "Not Recommended for New Design" (NRND) per ordering table-intended for industrial and commercial use only.

How does GREF voltage affect ON-state resistance and propagation delay?

GREF directly controls NMOS gate drive strength: at GREF = 4.5 V, R_ON is 3.5 Ω typ. and t_PHL is ≤1.2 ns; at GREF = 1.5 V, R_ON rises to 60–140 Ω and delay increases to ≤1.4 ns. Datasheet specifies GREF must exceed SREF by ≥1.5 V for reliable operation-lower GREF degrades speed and increases voltage drop.