Texas Instruments SN74GTL2107PW

Overview

SN74GTL2107PW from Texas Instruments is a 12-bit bidirectional GTL–/GTL/GTL+ to LVTTL translator in a 28-pin TSSOP package, operating at 3.3 V supply with VREF programmable for GTL– (0.6 V), GTL (0.8 V), or GTL+ (1.0 V) interfaces, featuring open-drain outputs on multiple channels and integrated 30-Ω series termination on LVTTL outputs - deployed in dual-processor platform health management systems for Intel Xeon™ processor I/O bridging.

For engineers reviewing the SN74GTL2107PW datasheet, SN74GTL2107PW pinout, SN74GTL2107PW application, or SN74GTL2107PW equivalent, this page delivers verified electrical specs, validated GTL/LVTTL translation behavior, confirmed TSSOP-28 package mapping, functional enable-delay logic for glitch suppression, and real-world use cases in CPU thermal and error signaling interconnects.

Technical Context

The SN74GTL2107PW implements asymmetric bidirectional level translation using separate VREF-referenced GTL inputs and LVTTL-compatible totem-pole or open-drain outputs, with two independent enable controls (EN1, EN2) managing distinct channel groups. Its architecture includes internal delay circuitry on the 7BO1/7BO2 outputs to prevent low-glitch transients during 5BI/6BI-to-5A/6A signal transitions.

It supports three GTL variants via external VREF setting (0.6 V for GTL–, 0.8 V for GTL, 1.0 V for GTL+), maintains JEDEC JESD78 latch-up immunity, and meets JESD22 ESD ratings: 2000-V HBM, 200-V MM, and 1000-V CDM - all validated across –40°C to 85°C operation.

Key Specifications

Pinout & Package

TSSOP-28 (PW) package: 9.7 mm × 4.4 mm body, 0.65 mm pitch, exposed pad not present, RoHS-compliant NiPdAu finish, MSL Level-1 (260°C peak reflow).

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74GTL2107PW, SN74GTL16616DGGR offers greater channel density but requires external termination and lacks glitch-suppression logic, while SN74AVC16T245DGGR provides broader voltage range support but cannot replicate GTL-specific VREF-referenced switching behavior or meet Intel Xeon™ platform health signal timing requirements.

Availability

SN74GTL2107PW is available at Aetrix Electronics and suitable for dual-processor thermal monitoring, CPU error signaling, and platform health management applications requiring stable component supply, long-term lifecycle assurance, and traceable sourcing for industrial server designs.

Supply support for SN74GTL2107PW 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

Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and connectivity technologies, with decades of expertise in high-reliability interface ICs for computing infrastructure.

The SN74GTL2107PW belongs to TI's GTL translator product line, engineered specifically for seamless integration between Intel Xeon™ processor GTL I/O and standard 3.3-V LVTTL logic in multi-socket server platforms.

FAQ

What is the function of VREF on the SN74GTL2107PW?

VREF on the SN74GTL2107PW sets the input threshold voltage for all GTL–/GTL/GTL+ inputs (pins 1BI–11BI, 9BI, 10AI1/2, etc.). It must be externally supplied at 0.6 V for GTL–, 0.8 V for GTL, or 1.0 V for GTL+ operation. The SN74GTL2107PW uses this reference to correctly interpret GTL logic levels and ensure accurate translation to LVTTL outputs. Deviation outside the 0.5–1.8 V range may cause incorrect switching behavior.

Does the SN74GTL2107PW support bidirectional translation without external control logic?

Yes, the SN74GTL2107PW supports true bidirectional translation on designated GTL I/O pins (e.g., 1BI/1AO, 2BI/2AO, 9BI/9AO) without external direction-control signals. Its internal architecture automatically senses signal direction based on voltage differentials and VREF-referenced thresholds. However, enable pins EN1 and EN2 must be actively driven to activate respective channel groups - no automatic direction sensing occurs on LVTTL-only paths like 5A/6A or 11A/11BO.

How does the SN74GTL2107PW handle power-down conditions on LVTTL inputs?

When VCC = 0 V, all LVTTL inputs on the SN74GTL2107PW - including 10AI1, 10AI2, EN1, EN2, and others - enter a high-impedance state with leakage current ≤±1 µA. This prevents current flow into the device even if those inputs are pulled to 3.3 V externally. The SN74GTL2107PW datasheet explicitly confirms this behavior for safe hot-swap and partial-power-down scenarios in server platforms.

What is the purpose of the delay circuit on 7BO1/7BO2 in the SN74GTL2107PW?

The delay circuit on 7BO1/7BO2 in the SN74GTL2107PW prevents low-glitch generation when 5BI/6BI transitions from low to high and the corresponding 5A/6A outputs lag by up to 100 ns. This intentional delay ensures that 7BO1/7BO2 remain high during the transient window, avoiding false deassertion of critical signals like PROCHOT_L or THRMTRIP_L. The SN74GTL2107PW integrates this logic internally - no external components are needed.

Can the SN74GTL2107PW be used with GTL+ (1.5-V) signaling?

Yes, the SN74GTL2107PW fully supports GTL+ operation when VREF is set to 1.0 V and VTT is supplied at 1.5 V. Its input voltage range accommodates GTL+ levels (0.87–1.1 V for VIL/VIL), and its open-drain GTL outputs drive correctly into 1.5-V termination networks. The SN74GTL2107PW datasheet specifies timing parameters (e.g., tPLH/tPHL) and electrical characteristics explicitly for GTL+ conditions, confirming validated interoperability.