NXP Semiconductors GTL2002D,112

Overview

GTL2002D,112 from NXP Semiconductors is a 2-bit bidirectional low-voltage translator IC using NMOS pass transistors for seamless voltage level translation between 1.0 V and 5.0 V buses without direction control. It features 6.5 Ω typical ON-state resistance, <5.5 ns propagation delay (tPLH/tPHL), and operates across −40 °C to +85 °C ambient temperature. It enables I²C-bus interface translation between 1.2 V/1.8 V processors and 3.3 V/5.0 V peripherals.

For engineers reviewing the GTL2002D,112 datasheet, GTL2002D,112 pinout, GTL2002D,112 application, or GTL2002D,112 equivalent, key selection criteria include bidirectional clamping architecture, absence of power supply requirement, 5 V tolerant inputs, ESD robustness (2000 V HBM), and SO8 package compatibility with legacy board layouts.

Technical Context

The GTL2002D,112 implements Gunning Transceiver Logic–Transceiver Voltage Clamp (GTL-TVC) topology with two matched NMOS pass transistors (S1/D1 and S2/D2) plus a reference transistor (SREF/DREF/GREF). Translation direction is determined dynamically by relative voltage levels on Sn and Dn ports, eliminating need for external direction signals.

Its gate-controlled clamp operation relies on GREF biased ≥1.5 V above SREF to ensure reliable conduction; when Dn is HIGH, Sn is clamped to SREF voltage; when Sn is LOW, Dn follows via low-Ron path. All transistors are fabricated identically, ensuring matched electrical characteristics and minimal inter-channel skew in voltage threshold and propagation delay.

Key Specifications

Pinout & Package

Package: SO8 (SOT96-1), plastic small outline package, 8 leads, 3.9 mm body width, standard marking.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TXB0102RUTR and SN74AVC2T244RSWR, GTL2002D,112 uniquely delivers supply-free bidirectional translation with sub-5 ns delay and 1.0 V compatibility - making it optimal for I²C, GTL+, and hot-swap embedded interfaces where simplicity and zero-power operation are mandatory.

Availability

GTL2002D,112 is available at Aetrix Electronics and suitable for industrial control systems, embedded computing platforms, and server memory subsystems requiring stable component supply and long-term obsolescence management.

Supply support for GTL2002D,112 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

NXP Semiconductors is a global semiconductor leader focused on secure connectivity solutions for automotive, industrial, and IoT applications.

The GTL2002D,112 belongs to NXP's GTL-TVC translator family, engineered specifically for passive, high-speed bidirectional voltage translation in mixed-voltage digital systems without direction control or auxiliary power.

FAQ

Does GTL2002D,112 require an external power supply to operate?

No, GTL2002D,112 operates passively without any VCC connection. It uses only signal-level voltages applied to its SREF, DREF, and GREF pins to establish bias conditions. This eliminates power supply design overhead, decoupling capacitors, and standby current concerns - a key differentiator from active translators like TXB0102RUTR. The GTL2002D,112 draws negligible current (<1 µA) under static conditions.

What is the maximum supported voltage translation range for GTL2002D,112?

GTL2002D,112 supports bidirectional translation between any pair of voltages from 1.0 V to 5.0 V inclusive, including 1.0 V ↔ 3.3 V, 1.2 V ↔ 5.0 V, and 1.8 V ↔ 3.3 V configurations. The device achieves this via its NMOS clamp architecture, where SREF sets the low-side clamping voltage and DREF/GREF bias determines conduction thresholds. The GTL2002D,112 datasheet explicitly confirms operation across this full range under recommended conditions.

Can GTL2002D,112 be used for I²C-bus level translation?

Yes, GTL2002D,112 is explicitly validated for I²C-bus applications in NXP's application notes and datasheet Figure 6. Its open-drain–compatible architecture, bidirectional operation without direction control, <5.5 ns propagation delay, and 6.5 Ω Ron preserve I²C timing budgets and arbitration behavior. For 1.2 V/1.8 V processors interfacing with 3.3 V I²C peripherals, the GTL2002D,112 provides a proven, supply-free solution that meets I²C specification rise/fall time and VOL requirements.

What is the recommended pull-up resistor value for GTL2002D,112 when interfacing with a 3.3 V bus?

For a 3.3 V higher-voltage side (Dn port), the recommended pull-up resistor is 217 Ω (nominal) or 237 Ω (+10 %) to limit pass-transistor current to 15 mA and maintain VOL ≤ 350 mV. This value is derived from Equation 1 in the GTL2002D,112 datasheet: R = (3.3 V − 0.35 V) / 0.015 A ≈ 197 Ω, rounded up to account for tolerance and VDD variation. The GTL2002D,112 datasheet Table 6 lists 217 Ω (nominal) and 237 Ω (+10 %) for 3.3 V operation.

Is GTL2002D,112 pin-compatible with other packages in the GTL2002 family?

No, GTL2002D,112 (SO8/SOT96-1) has a different pinout than GTL2002DP (TSSOP8), GTL2002DC (VSSOP8), and GTL2002GM (XQFN8). While all share identical functionality and electrical specs, the VSSOP8 variant (GTL2002DC) reorders pins 1–4 and 5–8, and XQFN8 uses a quad layout with terminal indexing. Therefore, GTL2002D,112 cannot be substituted with other GTL2002 variants without PCB layout revision. Always verify pin mapping using Figures 2–5 in the GTL2002D,112 datasheet.