Texas Instruments SN74LVTH16952DL

Overview

SN74LVTH16952DL from Texas Instruments is a 3.3-V ABT 16-bit registered transceiver with 3-state outputs, designed for mixed-mode signal operation between 3.3-V and 5-V systems. It supports dual 8-bit or single 16-bit data flow, features bus-hold on all data inputs, operates down to 2.7 V, and delivers 150-MHz clock frequency capability. It is used in high-speed backplane and board-to-board communication interfaces requiring hot-insertion support.

For engineers reviewing the SN74LVTH16952DL datasheet, SN74LVTH16952DL pinout, SN74LVTH16952DL application, or SN74LVTH16952DL equivalent, key selection considerations include its 56-pin SSOP (DL) package, Ioff-enabled hot-swap capability, TTL-compatible 5-V input tolerance, distributed VCC/GND layout for noise reduction, and latch-up immunity exceeding 500 mA per JESD 17.

Technical Context

The SN74LVTH16952DL implements dual independent 8-bit registered transceiver channels-A↔B-with separate clock (CLKAB/CLKBA), clock-enable (CLKENAB/CLKENBA), and output-enable (OEAB/OEBA) controls per direction. Each channel latches data on the low-to-high clock transition when its corresponding clock-enable is low.

It integrates active bus-hold circuitry on all A- and B-port data lines to maintain valid logic states without external resistors, and employs power-up 3-state and Ioff protection to ensure high-impedance outputs during power sequencing and system hot insertion-critical for modular backplane architectures.

Key Specifications

Pinout & Package

SN74LVTH16952DL is housed in a 56-pin Shrink Small-Outline Package (SSOP-DL), 13.9 mm × 7.5 mm body size, 0.5-mm lead pitch, 1.2-mm max height, RoHS-compliant with NIPDAU lead finish and MSL Level-1 rating.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar registered transceiver applications.

Compared with SN74LVTH16952DL, SN74LVTH16245DL omits clocking and registration-reducing latency but eliminating synchronous data capture-while SN74LVC16T245DGGR adds flexible dual-voltage translation at the cost of register functionality and hot-swap robustness.

Availability

SN74LVTH16952DL is available at Aetrix Electronics and suitable for industrial backplanes, modular instrumentation, and embedded memory expansion requiring stable component supply, long-lifecycle availability, and guaranteed hot-swap compliance.

Supply support for SN74LVTH16952DL 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, scalability, and broad application support.

The SN74LVTH16952DL belongs to TI's Widebus™ family of advanced BiCMOS transceivers, engineered specifically for high-speed, mixed-voltage board-level interconnects in industrial, telecom, and test equipment where signal integrity and hot-plug resilience are critical.

FAQ

What is the operating temperature range for SN74LVTH16952DL?

The SN74LVTH16952DL is characterized for operation from –40°C to +85°C, meeting industrial-grade environmental requirements. This range is explicitly specified in the SCBS697G datasheet and validated across production lots. The device maintains full functionality-including Ioff behavior, bus-hold strength, and timing parameters-within this span. Operation outside this range is not guaranteed and may compromise latch-up immunity or ESD performance.

Does SN74LVTH16952DL support hot insertion, and how is it implemented?

Yes, SN74LVTH16952DL supports hot insertion via two integrated mechanisms: Ioff circuitry disables outputs when VCC = 0 V, preventing reverse current flow; and power-up 3-state forces outputs into high-impedance during power ramp-up or brownout. These features are verified per JEDEC standards and documented in the functional description and absolute maximum ratings sections of the SCBS697G datasheet.

Can SN74LVTH16952DL interface directly with 5-V logic systems?

Yes, SN74LVTH16952DL accepts input voltages up to 5.5 V while operating from a 3.3-V VCC supply, enabling direct connection to 5-V TTL outputs without external level shifters. This 5-V-tolerant input capability is confirmed in the "recommended operating conditions" table (VI = 5.5 V) and electrical characteristics (II leakage ≤ 20 µA at VI = 5.5 V), making it ideal for mixed-voltage backplane designs.

What package type does SN74LVTH16952DL use, and what are its key mechanical dimensions?

SN74LVTH16952DL uses a 56-pin Shrink Small-Outline Package (SSOP-DL) with 0.5-mm lead pitch, 13.9 mm × 7.5 mm body size, and 1.2-mm maximum height. Its land pattern and stencil design guidelines are published by Texas Instruments under drawing DGG0056A, and it carries MSL Level-1 rating for unlimited floor life at ≤30°C/60% RH.

How many independent register channels does SN74LVTH16952DL provide?

SN74LVTH16952DL provides four independent register channels: two for A→B direction (1CLKAB/1CLKENAB/1OEAB and 2CLKAB/2CLKENAB/2OEAB) and two for B→A direction (1CLKBA/1CLKENBA/1OEBA and 2CLKBA/2CLKENBA/2OEBA). Each channel controls eight data bits, allowing flexible configuration as dual 8-bit or unified 16-bit registered transceivers.