NXP Semiconductors GTL2006PW,118

Overview

GTL2006PW,118 from NXP Semiconductors (formerly Philips Semiconductors) is a 13-bit bidirectional GTL–/GTL/GTL+ to LVTTL voltage-level translator designed for platform health management in dual-processor Xeon® systems. It operates from 3.0 V to 3.6 V, features 30 Ω series termination on LVTTL outputs, supports VREF programmability from 0.5 V to 1.8 V, and delivers 5.5 ns typical propagation delay (An↔Bn). It interfaces CPU thermal and power control signals including PROCHOT#, THRMTRIP#, and FORCEPR#.

For engineers reviewing the GTL2006PW,118 datasheet, GTL2006PW,118 pinout, GTL2006PW,118 application, or GTL2006PW,118 equivalent, this device is critical for robust signal translation between GTL-family processor I/O and LVTTL southbridge logic-especially where open-drain coordination, glitch suppression on 7BO1/7BO2, and unpowered high-impedance inputs are required.

Technical Context

The GTL2006PW,118 implements asymmetric bidirectional translation: LVTTL-side pins (A ports) drive or receive standard 3.3 V logic with totem-pole or open-drain configurations, while GTL-side pins (B ports) interface with sub-1 V threshold GTL–/GTL/GTL+ buses using VREF-referenced input thresholds (±50 mV). Its internal enable timing deliberately delays 7BO1/7BO2 activation by up to 120–350 ns to prevent glitches caused by slow-rising open-drain outputs (5A/6A).

It integrates dedicated wired-OR paths (e.g., 11BI ↔ 11A ↔ 11BO), supports independent VTT (up to 3.6 V) and VREF (0.5–1.8 V) supplies, and provides ESD protection exceeding 2000 V HBM. All LVTTL inputs remain high-impedance with no leakage when unpowered, but LVTTL totem-pole outputs may sink current if pulled high during VCC = 0 V.

Key Specifications

Pinout & Package

Package: TSSOP28 (SOT361-1), 4.4 mm body width, surface-mount, RoHS-compliant.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar GTL-to-LVTTL translation applications.

Compared with SN74GTLP1395PWR and 74ALVC164245DGGR, the GTL2006PW,118 uniquely supports VREF-programmable GTL thresholds, built-in glitch suppression for wired-OR arbitration, and verified dual-processor platform health use cases-making it irreplaceable for Intel Xeon®-based thermal/power management designs.

Availability

GTL2006PW,118 is available at Aetrix Electronics and suitable for server motherboard design, dual-CPU thermal management systems, and Intel platform health monitoring applications requiring stable component supply across extended production lifecycles.

Supply support for GTL2006PW,118 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 (originally Philips Semiconductors) is a global semiconductor leader focused on secure connectivity solutions for automotive, industrial, and communication infrastructure markets.

The GTL2006PW,118 belongs to NXP's legacy logic translation portfolio, specifically engineered for Intel Xeon® platform interoperability-enabling reliable, low-latency signal bridging between GTL processor I/O and LVTTL chipset logic in high-reliability server environments.

FAQ

What is the function of the VREF pin on the GTL2006PW,118?

The VREF pin on the GTL2006PW,118 sets the reference voltage for all GTL–/GTL/GTL+ input thresholds (VIH and VIL), defined as VREF ±50 mV. It supports a wide range of 0.5 V to 1.8 V, allowing system designers to optimize noise margins for specific GTL variants (e.g., 0.6 V for GTL–, 0.8 V for GTL, 1.0 V for GTL+) without changing hardware. This flexibility ensures robust operation across varying VTT and noise environments in dual-processor platforms.

Does the GTL2006PW,118 support hot insertion or unpowered operation?

Yes-the GTL2006PW,118 LVTTL inputs (including 10AI1 and 10AI2) enter a true high-impedance state with no leakage current when VCC = 0 V, making them safe for hot-swap or partial-power-down scenarios. However, its LVTTL totem-pole outputs (e.g., 1AO–4AO, 9AO) may sink current if externally pulled high during unpowered operation, so those pins should be isolated or clamped in such systems. GTL I/O and open-drain outputs remain non-leaking.

How does the GTL2006PW,118 prevent glitches on 7BO1 and 7BO2 outputs?

The GTL2006PW,118 prevents glitches on 7BO1 and 7BO2 by incorporating an intentional enable delay (120–350 ns depending on GTL variant) that activates these outputs only after 5BI/6BI transitions have fully settled and their corresponding open-drain outputs (5A/6A) have risen. This delay avoids transient LOW pulses caused by timing mismatches between GTL input assertion and open-drain output rise time-a critical feature for reliable PROCHOT# arbitration in dual-CPU systems.

Can the GTL2006PW,118 operate with VTT = 1.2 V and VREF = 0.6 V?

Yes-the GTL2006PW,118 explicitly supports VTT from 0.5 V to 3.6 V and VREF from 0.5 V to 1.8 V independently. At VTT = 1.2 V and VREF = 0.6 V, the device meets GTL– specifications: VIH = 0.65 V and VIL = 0.55 V (±50 mV), providing adequate noise margins for low-voltage server platforms. This configuration is validated in the datasheet's Recommended Operating Conditions table and used in actual Xeon® platform implementations.

What is the purpose of the 30 Ω series termination on LVTTL outputs?

The 30 Ω series termination on GTL2006PW,118 LVTTL outputs (e.g., 1AO–4AO, 9AO) is integrated to dampen signal reflections on PCB traces, particularly in point-to-point connections to southbridge or PMU logic. It matches typical trace impedances (~60 Ω differential, ~30 Ω single-ended) and reduces overshoot/ringing without requiring external resistors-simplifying layout, saving board space, and improving signal integrity for timing-critical signals like FORCEPR# and IERR#.