Texas Instruments SN65LVELT23DGK

Overview

SN65LVELT23DGK from Texas Instruments is a dual 3.3-V differential LVPECL/LVDS-to-LVTTL translator IC in an 8-pin VSSOP (DGK) package. It provides two independent channels with 24-mA LVTTL outputs, 2-ns typical propagation delay, and supports clock/data transmission up to >180 MHz. It operates across –40°C to +85°C and integrates internal 50-kΩ pullup/pulldown resistors for open-input biasing.

For engineers reviewing the SN65LVELT23DGK datasheet, SN65LVELT23DGK pinout, SN65LVELT23DGK application, or SN65LVELT23DGK equivalent, this device serves as a drop-in compatible replacement for MC100LVELT23 in backplane clock distribution, level-shifting interfaces between high-speed serial links and TTL logic, and timing-critical FPGA/ASIC I/O bridging where low skew (<160 ps) and temperature-stable operation are required.

Technical Context

The SN65LVELT23DGK implements dual differential input receivers with built-in termination biasing at VCC/2, enabling direct connection to LVPECL or LVDS sources without external resistors. Each channel converts differential inputs into single-ended LVTTL outputs with rail-to-rail swing compliance (VOH ≥ 2.4 V at –3 mA, VOL ≤ 0.5 V at 24 mA).

Its AC performance includes 180-MHz maximum switching frequency, output-to-output skew as low as 30 ps (tSK++), and random jitter of 4–10 ps RMS. Internal temperature compensation maintains consistent DC thresholds and propagation delay across the full industrial temperature range.

Key Specifications

Pinout & Package

SN65LVELT23DGK is housed in an 8-pin VSSOP (DGK) package, 3.0 mm × 3.0 mm × 1.1 mm height, with exposed pad for thermal enhancement and RoHS-compliant NiPdAu lead finish. MSL Level-1 rating enables standard reflow without moisture preconditioning.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar differential-to-single-ended translation applications.

Compared with MC100LVELT23DT and SN65LVEP23DGK, the SN65LVELT23DGK offers optimal density and thermal performance in VSSOP packaging while maintaining strict drop-in compatibility with legacy MC100LVELT23 designs - making it ideal for volume production where board area and reflow profile consistency are critical.

Availability

SN65LVELT23DGK is available at Aetrix Electronics and suitable for backplane clock distribution, FPGA-to-ASIC bridging, and industrial PLC timing modules requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.

Supply support for SN65LVELT23DGK 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 high-performance analog solutions for industrial, automotive, and communications markets.

The SN65LVELT23DGK belongs to TI's high-speed interface translator product line, designed specifically for reliable, low-skew level conversion between differential signaling standards (LVPECL/LVDS) and legacy LVTTL logic in timing-critical infrastructure systems.

FAQ

What is the maximum operating frequency supported by the SN65LVELT23DGK?

The SN65LVELT23DGK supports clock frequencies up to >180 MHz, with AC characterization confirming reliable operation at 300 MHz under typical conditions. This specification is verified per JEDEC test methods with VOL < 0.5 V and VOH > 2.4 V at VCC = 3.3 V, making SN65LVELT23DGK suitable for high-speed serial link timing and backplane clock distribution applications.

Does the SN65LVELT23DGK require external biasing resistors on its differential inputs?

No, the SN65LVELT23DGK does not require external biasing resistors. It integrates internal 50-kΩ pullup and pulldown resistors that automatically bias open differential inputs to VCC/2, ensuring defined logic states without additional components - a key advantage over discrete resistor-based solutions that increase layout complexity and BOM cost.

Is the SN65LVELT23DGK pin-compatible with the MC100LVELT23 series?

Yes, the SN65LVELT23DGK is explicitly documented as drop-in compatible with MC100LVELT23. Both share identical pin assignments, electrical specifications, and functional behavior. The SN65LVELT23DGK retains the same D0/D0/D1/D1/Q0/Q1/VCC/GND mapping and supports identical load conditions, enabling direct substitution in existing designs using the VSSOP-8 footprint.

What thermal performance can be expected from the SN65LVELT23DGK in a VSSOP-8 package?

The SN65LVELT23DGK in VSSOP-8 exhibits a junction-to-board thermal resistance (θJB) of 213°C/W (low-K board) and 189°C/W (high-K board), with a maximum power dissipation of 469 mW at TA < 25°C. Its MSL Level-1 rating and 1.1-mm height allow standard reflow profiles, and the exposed pad enhances heat transfer in thermally constrained layouts.

How does the SN65LVELT23DGK handle input common-mode voltage variations?

The SN65LVELT23DGK specifies an input high-voltage common-mode range (VIHCMR) of 1.2 V to VCC, supporting differential inputs with wide common-mode excursions. This allows robust operation with LVPECL sources (typically ~2.0 V common-mode) and LVDS sources (~1.2 V), and its internal biasing maintains correct thresholds even when inputs float within this range - a feature confirmed in TI's SLLS929A datasheet.