Texas Instruments SN65LVELT23DGKR

Overview

SN65LVELT23DGKR from Texas Instruments is a dual 3.3-V differential LVPECL/LVDS-to-LVTTL translator IC used for clock and data level conversion in high-speed backplane interfaces. It delivers 24-mA LVTTL outputs, supports >180 MHz switching frequency, exhibits 2-ns typical propagation delay, and operates across –40°C to +85°C with internal 50-kΩ pullup/pulldown resistors.

For engineers reviewing the SN65LVELT23DGKR datasheet, SN65LVELT23DGKR pinout, SN65LVELT23DGKR application, or SN65LVELT23DGKR equivalent, key selection considerations include its VSSOP-8 package, LVPECL input common-mode range (1.2 V to VCC), LVTTL output voltage compliance (VOH ≥ 2.4 V at –3 mA, VOL ≤ 0.5 V at 24 mA), and drop-in compatibility with MC100LVELT23 in timing-critical signal integrity applications.

Technical Context

The SN65LVELT23DGKR integrates two independent differential LVPECL/LVDS input channels with internal termination biasing, each driving a dedicated LVTTL output. Its input stage maintains VCC/2 bias when left open, enabling robust operation without external resistors. The device uses temperature-compensated circuitry to stabilize DC thresholds and jitter performance across industrial temperature ranges.

Each channel features matched propagation paths ensuring tight output-to-output skew (≤160 ps) and part-to-part skew (≤200 ps), critical for synchronous clock distribution. AC performance is specified with 20-pF load and 500-Ω LVTTL termination, supporting full-swing logic transitions up to 300 MHz under nominal conditions while maintaining <10 ps RMS random jitter.

Key Specifications

Pinout & Package

VSSOP-8 package (DGK), 3.0 mm × 3.0 mm body, 1.1 mm max height, 0.65 mm lead pitch, exposed pad not electrically connected.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MC100LVELT23DT, SN65LVELT23DGKR reduces quiescent current by ~15% and improves thermal resistance in VSSOP packaging; compared with SN65LVEP23DGKR, it lacks LVDS input support but offers lower cost and proven stability in established 3.3-V clock distribution designs.

Availability

SN65LVELT23DGKR is available at Aetrix Electronics and suitable for backplane clock distribution, high-speed data transmission over backplane, signaling level conversion, and FPGA interface bridging requiring stable component supply and guaranteed long-term manufacturability.

Supply support for SN65LVELT23DGKR 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 delivering analog, embedded processing, and connectivity solutions with emphasis on reliability, precision, and energy efficiency.

The SN65LVELT23DGKR belongs to TI's high-speed interface translator product line, engineered specifically for deterministic timing integrity in telecom infrastructure, test equipment, and industrial control backplane systems.

FAQ

What is the operating temperature range for the SN65LVELT23DGKR?

The SN65LVELT23DGKR is rated for industrial operation from –40°C to +85°C. This range is validated across all AC and DC specifications including propagation delay, output drive, and input threshold stability. The device incorporates built-in temperature compensation to maintain consistent timing and logic thresholds throughout this range, making SN65LVELT23DGKR suitable for deployment in base stations, industrial PLCs, and outdoor network equipment where ambient extremes occur.

Does the SN65LVELT23DGKR require external biasing resistors on its LVPECL inputs?

No, the SN65LVELT23DGKR does not require external biasing resistors. It integrates internal 50-kΩ pullup and pulldown resistors on each differential input pair (D0/D0 and D1/D1), automatically establishing a VCC/2 common-mode bias point when inputs are left open. This feature eliminates four external resistors per channel, simplifying layout and reducing BOM cost while maintaining robust noise immunity-confirmed in TI's SLLS929A datasheet for SN65LVELT23DGKR.

What package type is used for the SN65LVELT23DGKR, and what are its key mechanical dimensions?

The SN65LVELT23DGKR uses the VSSOP-8 (DGK) package: 3.0 mm × 3.0 mm body size, 1.1 mm maximum height, 0.65 mm lead pitch, and 8-pin configuration with gull-wing leads. Its land pattern follows JEDEC MO-187 standards, and the package includes an exposed thermal pad that is not electrically connected. These dimensions enable high-density placement in space-constrained backplane controller modules while maintaining thermal performance per θJB = 120 °C/W.

Can the SN65LVELT23DGKR be used as a direct replacement for MC100LVELT23 in existing designs?

Yes, the SN65LVELT23DGKR is explicitly documented as drop-in compatible with MC100LVELT23. It matches pinout, DC/AC electrical specifications, and functional behavior-including internal biasing, propagation delay, and output drive-while offering improved power efficiency (21 mA typical ICC vs. 25 mA). No PCB layout or firmware changes are required when substituting SN65LVELT23DGKR into MC100LVELT23-based designs, as confirmed in TI's official datasheet revision history and ordering information.

What is the maximum clock frequency supported by the SN65LVELT23DGKR?

The SN65LVELT23DGKR supports a minimum guaranteed maximum switching frequency of 180 MHz across the full operating temperature range (–40°C to +85°C), with typical performance extending to 300 MHz at 25°C. This specification is measured under defined load conditions (RL = 500 Ω to GND, CL = 20 pF), ensuring reliable logic-level translation for OC-3, STM-1, and other telecom clocking applications. The 2-ns typical propagation delay and <10 ps RMS jitter further validate SN65LVELT23DGKR's suitability for high-fidelity timing distribution.