Texas Instruments SN74GTL2010PW

Overview

SN74GTL2010PW from Texas Instruments is a 10-bit bidirectional low-voltage translator IC in TSSOP-24 package, enabling voltage-level translation between 1 V and 5.5 V domains without direction control. It features 10 matched NMOS pass transistors (S1–S10/D1–D10), a reference transistor (SREF/DREF/GREF), and supports GTL, GTL+, LVTTL/TTL, and 5-V CMOS interfaces. Used in I²C bus level-shifting and processor-to-chipset interconnects.

For engineers reviewing the SN74GTL2010PW datasheet, SN74GTL2010PW pinout, SN74GTL2010PW application, or SN74GTL2010PW equivalent, key selection criteria include its bidirectional clamping architecture, 1.5 ns typical propagation delay, 7–15 Ω on-state resistance at 1.5–4.5 V GREF, 5-V-tolerant inputs, and flow-through TSSOP-24 layout optimized for PCB trace routing.

Technical Context

The SN74GTL2010PW implements a passive NMOS clamp-based translation architecture with ten identical Sn/Dn channel pairs and one dedicated SREF/DREF/GREF reference transistor. Translation direction is determined dynamically by relative voltage levels on Sn and Dn ports, eliminating need for external direction control logic.

Operation requires GREF tied to DREF and pulled high via external resistor (e.g., 200 kΩ) to the higher-voltage domain, while SREF connects to the lower-voltage core supply (1 V to VCC − 1.5 V). The device functions as either bidirectional translator or unidirectional up/down shifter depending on biasing configuration and external pullup placement.

Key Specifications

Pinout & Package

TSSOP-24 (PW) package: 7.8 mm × 4.4 mm × 1.2 mm body, 0.65 mm lead pitch, gull-wing leads, RoHS-compliant NiPdAu finish, MSL Level-1.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74GTL2010PW, SN74AVC16T245DGGR offers higher channel count but mandates direction control and dual supplies, while TXS0108EPRJR provides simpler biasing but sacrifices GTL optimization, 5-V tolerance, and sub-ns timing - making SN74GTL2010PW uniquely suited for high-speed, zero-power, GTL-aware interconnects.

Availability

SN74GTL2010PW is available at Aetrix Electronics and suitable for industrial computing, embedded processor interconnects, and high-speed I²C/SMBus translation requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for SN74GTL2010PW 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 interface and signal-integrity solutions.

The GTL2010 product line was designed specifically for high-speed, low-voltage bidirectional translation in computing and communications infrastructure - targeting GTL/GTL+, LVTTL, and multi-rail I/O bridging where direction control overhead and power consumption must be minimized.

FAQ

What is the primary function of the SN74GTL2010PW?

The SN74GTL2010PW is a 10-bit bidirectional low-voltage translator that enables seamless voltage-level translation between 1 V and 5.5 V logic domains without requiring a direction control signal. Its NMOS clamp architecture uses matched pass transistors and a dedicated reference transistor (SREF/DREF/GREF) to automatically manage signal flow based on relative port voltages. This makes SN74GTL2010PW ideal for I²C bus translation, GTL-to-LVTTL interfacing, and processor-to-chipset interconnects where minimal propagation delay (<5.5 ns) and zero-power operation are critical.

Does the SN74GTL2010PW require an external power supply?

No, the SN74GTL2010PW does not require an external VCC supply - it operates entirely from the voltage present on its signal pins (Sn, Dn, SREF, DREF, GREF). Power is derived parasitically from the driven signal rails, enabling true zero-power translation and hot-insertion capability. The only external components needed are pullup resistors (typically 200 kΩ) on GREF/DREF and optional filtering capacitors. This eliminates power rail dependencies and simplifies system design compared to dual-supply translators like the SN74AVC16T245DGGR.

How is bidirectional translation achieved without a direction pin in the SN74GTL2010PW?

The SN74GTL2010PW achieves directionless translation through its NMOS clamp topology: when either Sn or Dn is LOW, the corresponding pass transistor turns ON, creating a low-resistance path; when the higher-voltage port goes HIGH, the reference transistor (SREF/DREF/GREF) clamps the lower-voltage port to SREF potential. This dynamic behavior - governed by real-time voltage differentials and controlled by GREF bias - eliminates need for external direction logic. The result is fully automatic, latency-optimized bidirectional signal coupling, a defining feature of SN74GTL2010PW not found in standard CMOS translators.

What are the absolute maximum voltage ratings for the SN74GTL2010PW I/O pins?

The SN74GTL2010PW specifies absolute maximum ratings of −0.5 V to +7 V for all I/O pins (Sn, Dn, SREF, DREF, VGREF), with recommended operating range of 0 V to 5.5 V. Its 5-V-tolerant inputs allow safe interfacing with 5-V logic even when core domains operate at 1.2 V or 1.8 V. Exceeding 7 V risks permanent damage, while operation below −0.5 V violates ESD diode forward-bias limits. These ratings are validated per JEDEC JESD78 and confirmed in TI's SCDS221 datasheet - critical for robustness in mixed-voltage systems where SN74GTL2010PW serves as a voltage-domain boundary.

Can the SN74GTL2010PW be used for unidirectional translation?

Yes, the SN74GTL2010PW supports both unidirectional up-translation (low-to-high voltage) and down-translation (high-to-low voltage) by configuring external pullup resistors and reference biasing. For down-translation, GREF/DREF are pulled to the higher-voltage domain (e.g., 3.3 V), and SREF is set to the target low-voltage level (e.g., 1.365 V); for up-translation, the same biasing applies but pullups are placed on the higher-voltage side to restore full logic HIGH. This flexibility - documented in TI's SCDS221 Figures 6 and 7 - makes SN74GTL2010PW adaptable beyond native bidirectional use, unlike fixed-direction translators such as the TXS0108EPRJR.