NXP Semiconductors GTL2006PW,112

Overview

GTL2006PW,112 from NXP Semiconductors (formerly Philips Semiconductors) is a 13-bit bidirectional GTL–/GTL/GTL+ to LVTTL voltage-level translator IC 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). Its primary role is interfacing processor GTL I/O with LVTTL chipset logic in thermal monitoring and system control paths.

For engineers reviewing the GTL2006PW,112 datasheet, GTL2006PW,112 pinout, GTL2006PW,112 application, or GTL2006PW,112 equivalent, key selection criteria include open-drain GTL/LVTTL I/O pairing (e.g., 5BI/5A/7BO1), glitch-suppressed enable timing for PROCHOT#/FRCPROCHOT# signal routing, VREF-adjustable noise margins, and TSSOP28 packaging for high-density server motherboard layouts.

Technical Context

The GTL2006PW,112 implements asymmetric bidirectional translation using separate input/output paths per port: LVTTL-side pins (1AO–4AO, 8AI, 9AO, 10AI1/10AI2, 11A) interface with 3.3 V logic, while GTL-side pins (1BI–4BI, 5BI–6BI, 8BO–11BO, 7BO1/7BO2, 9BI) operate referenced to VTT and VREF. Critical internal logic includes dedicated delay blocks on 7BO1/7BO2 enable paths to prevent glitches during open-drain transitions on 5A/6A.

It integrates three functional modes: sampling receiver (GTL→LVTTL), driver (LVTTL→GTL), and wired-OR monitoring (e.g., 11BI ↔ 11A ↔ 11BO). The 11A and 5A/6A pins are open-drain LVTTL I/Os with internal pull-down disable logic, while 7BO1/7BO2 outputs are enabled only when corresponding GTL inputs (5BI/6BI) are asserted-enabling CPU thermal event arbitration without cross-talk.

Key Specifications

Pinout & Package

TSSOP28 package (SOT361-1), 4.4 mm body width, 0.65 mm lead pitch - optimized for automated assembly and thermal dissipation in dense server motherboard layouts.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74GTL16616DGGR and 74ALVC164245PAG, the GTL2006PW,112 uniquely integrates VREF-programmable GTL input thresholds, dedicated glitch-suppressed enable paths for thermal arbitration, and open-drain I/O pairing - making it irreplaceable for Xeon® platform health management where signal integrity and timing-critical wired-OR behavior are mandatory.

Availability

GTL2006PW,112 is available at Aetrix Electronics and suitable for dual-processor server platform health management, CPU thermal event arbitration, and FORCEPR_L interface applications requiring stable component supply across extended product lifecycles.

Supply support for GTL2006PW,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 (formerly Philips Semiconductors) is a global semiconductor leader specializing in secure connectivity solutions for automotive, industrial, and communication infrastructure markets.

The GTL2006PW,112 belongs to NXP's legacy high-speed interface translator family, engineered specifically for Intel Xeon® platform health management - enabling reliable GTL/LVTTL signal bridging in thermally constrained, high-reliability server environments.

FAQ

What is the function of the VREF pin on the GTL2006PW,112?

The VREF pin on the GTL2006PW,112 sets the input threshold voltage for all GTL-side pins (1BI–11BI), where VIH = VREF + 50 mV and VIL = VREF – 50 mV. It supports a 0.5 V to 1.8 V range, allowing precise noise margin tuning for GTL– (0.85–0.95 V VTT), GTL (1.14–1.26 V VTT), or GTL+ (1.35–1.65 V VTT) operation. This flexibility ensures robust signal detection across varying platform voltage rails without hardware modification.

How does the GTL2006PW,112 prevent glitches on 7BO1 and 7BO2 outputs?

The GTL2006PW,112 prevents glitches on 7BO1 and 7BO2 by incorporating an intentional delay in their enable path, triggered by 5BI/6BI transitions. This delay ensures that when 5BI goes LOW, the 7BO1 output disables *before* the resulting LOW on open-drain 5A can propagate back and falsely assert 7BO1. Verified in application testing, this design eliminates transient false LOWs during CPU thermal event arbitration - a critical requirement for reliable PROCHOT# handling in dual-Xeon systems.

Can the GTL2006PW,112 operate with VTT = 1.2 V and VREF = 0.6 V?

Yes, the GTL2006PW,112 can operate with VTT = 1.2 V and VREF = 0.6 V. Per the datasheet, VREF is independently adjustable from 0.5 V to 1.8 V regardless of VTT, enabling optimized noise margins for GTL operation. At VREF = 0.6 V, GTL VIH becomes 0.65 V and VIL becomes 0.55 V - matching the 0.5–0.63 V VREF range specified for GTL– mode with 1.14–1.26 V VTT, ensuring correct logic interpretation in server thermal monitoring circuits.

Are the LVTTL inputs of the GTL2006PW,112 high-impedance when the device is unpowered?

Yes, all LVTTL inputs (1AO–4AO, 8AI, 9AO, 10AI1/10AI2, 11A) on the GTL2006PW,112 remain in a high-impedance state when unpowered, with no leakage path to VCC. This allows safe "hot" connection of LVTTL signals (e.g., southbridge outputs) even when the GTL2006PW,112 supply is off - a key feature for modular server board designs where power sequencing must isolate translation stages during initialization.

What is the purpose of the 30 Ω series termination on GTL2006PW,112 LVTTL outputs?

The 30 Ω series termination on GTL2006PW,112 LVTTL outputs (e.g., 1AO–4AO, 9AO) is designed to match typical PCB trace impedances (40–60 Ω) and suppress signal reflections on high-speed control lines such as FORCEPR_L or SMI_L. This integrated termination eliminates the need for external resistors, reduces layout complexity, and maintains signal integrity over trace lengths exceeding 5 cm - directly supporting reliable platform health signaling in dense server motherboard topologies.