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Home > Products > Integrated Circuits (ICs) > Logic > Buffers, Drivers, Receivers, Transceivers

Texas Instruments SN74LVTH16952DLG4

Name: SN74LVTH16952DLG4
Brand: Texas Instruments
SKU: SN74LVTH16952DLG4
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SN74LVTH16952DLG4

Manufacturer:: Texas Instruments

Category:: Buffers, Drivers, Receivers, Transceivers

Package:: 56-BSSOP (0.295", 7.50mm Width)

Datasheet:: SN74LVTH16952DLG4.pdf

Description:: IC TXRX NON-INVERT 3.6V 56SSOP

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Product details

Overview

SN74LVTH16952DLG4 from Texas Instruments is a 3.3-V ABT 16-bit registered transceiver with 3-state outputs, designed for bidirectional data flow between 3.3-V logic and 5-V TTL systems. It supports mixed-mode operation (5-V inputs/outputs with 3.3-V V_CC), features bus-hold on all data inputs, and operates from 2.7 V to 3.6 V. Used in backplane interface and hot-pluggable module control.

For engineers reviewing the SN74LVTH16952DLG4 datasheet, SN74LVTH16952DLG4 pinout, SN74LVTH16952DLG4 application, or SN74LVTH16952DLG4 equivalent, key selection criteria include its 16-bit registered transceiver architecture, I_off and power-up 3-state support for hot insertion, distributed V_CC/GND pins for noise reduction, and compatibility with both SSOP-56 and TSSOP-56 packages.

Technical Context

The SN74LVTH16952DLG4 implements dual 8-bit or single 16-bit registered transceiver functionality using Advanced BiCMOS Technology (ABT). Its clock-enable-controlled latching (CLKAB/CLKBA with CLKENAB/CLKENBA) enables synchronous data capture on low-to-high clock transitions, while independent OEAB/OEBA controls output enable per direction.

It integrates active bus-hold circuitry eliminating external pull resistors, supports unregulated battery operation down to 2.7 V, and provides I_off protection during power-down to prevent backflow current. The device meets JESD 17 latch-up (>500 mA) and MIL-STD-883 ESD (>2000 V HBM) specifications.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CC Range	2.7 V to 3.6 V - Enables stable operation across wide supply tolerance, including battery droop scenarios.
Max Clock Frequency	150 MHz - Supports high-speed synchronous data transfer in backplane and memory interface applications.
I_OL / I_OH	64 mA / –32 mA - Delivers robust drive strength for driving multiple loads or long traces without external buffers.
Bus-Hold Current	±75 µA at V_CC = 3 V - Maintains valid logic levels on floating A/B port inputs, removing need for external biasing.
Propagation Delay	t_PLH/t_PHL ≤ 4 ns (V_CC = 3.3 V, CL = 50 pF) - Ensures tight timing margins in high-speed digital systems.
Hot-Insertion Support	I_off ≤ ±100 µA at V_CC = 0 - Prevents damaging current flow when powered down in live backplanes.
Operating Temperature	–40°C to +85°C - Qualified for industrial-grade embedded and communications equipment environments.

Pinout & Package

SN74LVTH16952DLG4 is packaged in a 56-pin Shrink Small-Outline Package (SSOP-DL), 13.9 mm × 7.9 mm × 1.2 mm body, with 0.5 mm pitch and gull-wing leads. Pin 1 marked via corner chamfer; seating plane defined per JEDEC MO-153.

Pin/Terminal	Circuit Role	Design Meaning
1OEAB, 2OEAB, 1OEBA, 2OEBA	Output Enable (active-low)	Individually controls 3-state output drivers for A→B or B→A data paths; tied high disables outputs.
1CLKAB, 2CLKAB, 1CLKBA, 2CLKBA	Register clock input	Triggers synchronous latching of A or B bus data on rising edge; requires corresponding CLKEN low.
1CLKENAB, 2CLKENAB, 1CLKENBA, 2CLKENBA	Register clock enable	Enables clock sampling; high forces register hold, blocking data updates regardless of clock edge.
A1–A8, B1–B8 (×2 sets)	Bidirectional data I/O	Eight dedicated A-side and eight B-side data lines; each pair supports independent 8-bit flow or combined 16-bit mode.
V_CC, GND (×8 total)	Power distribution	Distributed V_CC and GND pins minimize simultaneous switching noise and improve signal integrity at high speed.

Key Features

Feature	Design Value
Mixed-mode 5-V tolerant I/O	Accepts 5-V inputs and drives 5-V loads while operating from 3.3-V V_CC, enabling seamless interfacing between voltage domains.
Flow-through pin architecture	Input and output pins arranged opposite each other on package edges, simplifying PCB trace routing and reducing layer count.
Power-up 3-state	Outputs remain high-impedance during power ramp (V_CC < 1.5 V), preventing bus contention at startup/shutdown.
Typical V_OLP < 0.8 V	Low ground bounce ensures signal integrity under heavy capacitive loading and fast switching conditions.
Latch-up immunity > 500 mA	Exceeds JESD 17 requirements, ensuring robustness against transient-induced latch-up in noisy industrial environments.

Applications

Backplane Interface	Hot-Pluggable Module Control
Use Scenario: Bidirectional data transfer between 3.3-V FPGA/CPU and legacy 5-V peripheral cards in telecom rack systems. IC Role / Device Role / Timing Role: Registered transceiver synchronizing data across voltage domains with clocked buffering and 3-state isolation. Use Value: Eliminates level-shifter ICs and external pull resistors while maintaining timing integrity up to 150 MHz.	Use Scenario: Enabling safe insertion/removal of line cards in powered chassis without disrupting backplane communication. IC Role / Device Role / Timing Role: Hot-insertion interface providing I_off protection and power-up 3-state to prevent bus conflicts during card insertion. Use Value: Guarantees zero-current backflow and glitch-free enable sequencing, meeting NEBS Level 3 reliability requirements.
Industrial PLC I/O Expansion	Memory Subsystem Bridging
Use Scenario: Extending microcontroller GPIO to drive 5-V sensors/actuators in factory automation controllers. IC Role / Device Role / Timing Role: Registered buffer isolating MCU core from noisy industrial I/O, with bus-hold holding inputs during sensor disconnect. Use Value: Reduces BOM count by replacing discrete buffers + pull-ups; supports 2.7–3.6 V brownout operation without reset.	Use Scenario: Interfacing 3.3-V SoC memory controller to 5-V SRAM or FIFO buffers in test equipment. IC Role / Device Role / Timing Role: Synchronous data register aligning write/read strobes across voltage domains with precise setup/hold timing. Use Value: Meets t_su = 2.5 ns and t_h = 0.8 ns (V_CC = 2.7 V) to sustain reliable burst transfers at full clock rate.

Backplane Interface

Hot-Pluggable Module Control

Use Scenario: Bidirectional data transfer between 3.3-V FPGA/CPU and legacy 5-V peripheral cards in telecom rack systems.

IC Role / Device Role / Timing Role: Registered transceiver synchronizing data across voltage domains with clocked buffering and 3-state isolation.

Use Value: Eliminates level-shifter ICs and external pull resistors while maintaining timing integrity up to 150 MHz.

Use Scenario: Enabling safe insertion/removal of line cards in powered chassis without disrupting backplane communication.

IC Role / Device Role / Timing Role: Hot-insertion interface providing I_off protection and power-up 3-state to prevent bus conflicts during card insertion.

Use Value: Guarantees zero-current backflow and glitch-free enable sequencing, meeting NEBS Level 3 reliability requirements.

Industrial PLC I/O Expansion

Memory Subsystem Bridging

Use Scenario: Extending microcontroller GPIO to drive 5-V sensors/actuators in factory automation controllers.

IC Role / Device Role / Timing Role: Registered buffer isolating MCU core from noisy industrial I/O, with bus-hold holding inputs during sensor disconnect.

Use Value: Reduces BOM count by replacing discrete buffers + pull-ups; supports 2.7–3.6 V brownout operation without reset.

Use Scenario: Interfacing 3.3-V SoC memory controller to 5-V SRAM or FIFO buffers in test equipment.

IC Role / Device Role / Timing Role: Synchronous data register aligning write/read strobes across voltage domains with precise setup/hold timing.

Use Value: Meets t_su = 2.5 ns and t_h = 0.8 ns (V_CC = 2.7 V) to sustain reliable burst transfers at full clock rate.

Equivalent & Alternatives

The following parts are listed as comparable options for similar 16-bit registered transceiver applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
SN74LVT16952DGGR	LVT family (not LVTH); no bus-hold; lower drive (I_OL = 32 mA); same pinout/package.	Suitable where external pull resistors are acceptable and lower current drive suffices.	Select SN74LVT16952DGGR only if bus-hold is unnecessary and system noise margin allows reduced drive strength.
SN74ALVCH16952DLR	ALVC family; 3.3-V only (no 5-V tolerance); includes auto-direction sensing; different pinout.	Used in self-managed bidirectional buses (e.g., I²C extensions), not fixed-direction voltage translation.	Choose SN74ALVCH16952DLR only for direction-agnostic applications requiring automatic control, not mixed-voltage interfacing.

Compared with SN74LVT16952DGGR and SN74ALVCH16952DLR, the SN74LVTH16952DLG4 uniquely combines 5-V I/O tolerance, integrated bus-hold, and ABT process low-noise performance-making it the sole option for robust, resistorless 3.3-V-to-5-V registered bridging in hot-swap systems.

Availability

SN74LVTH16952DLG4 is available at Aetrix Electronics and suitable for industrial PLCs, telecom backplanes, hot-pluggable modules, and memory subsystem bridging requiring stable component supply and long-term industrial lifecycle support.

Supply support for SN74LVTH16952DLG4 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 for industrial, automotive, and communications markets.

The SN74LVTH16952DLG4 belongs to TI's Widebus™ ABT family, engineered specifically for high-speed, low-noise, mixed-voltage registered data transfer in mission-critical infrastructure equipment.

FAQ

What voltage levels does the SN74LVTH16952DLG4 support on its I/O ports?

The SN74LVTH16952DLG4 supports 5-V input and output voltage levels while operating from a 3.3-V V_CC supply. Its inputs tolerate up to 7 V, and outputs drive 5-V logic levels compliant with TTL thresholds. This mixed-mode capability is confirmed in the absolute maximum ratings and recommended operating conditions tables of the SCBS697G datasheet.

Does the SN74LVTH16952DLG4 require external pull-up or pull-down resistors on data lines?

No, the SN74LVTH16952DLG4 includes active bus-hold circuitry on all A and B port inputs, eliminating the need for external pull-up or pull-down resistors. The bus-hold current is ±75 µA at V_CC = 3 V, sufficient to maintain valid logic states on unused or floating inputs, as specified in the electrical characteristics table.

Is the SN74LVTH16952DLG4 suitable for hot-insertion applications?

Yes, the SN74LVTH16952DLG4 is explicitly characterized for hot-insertion use via I_off and power-up 3-state features. When V_CC = 0, I_off is limited to ±100 µA, preventing damaging backflow current. During power-up/down, outputs remain in high-impedance state until V_CC exceeds 1.5 V, avoiding bus conflicts.

What is the maximum clock frequency supported by the SN74LVTH16952DLG4?

The SN74LVTH16952DLG4 supports a maximum clock frequency of 150 MHz across its full operating range (V_CC = 2.7 V to 3.6 V, T_A = –40°C to +85°C). This value is specified in the timing requirements table of the SCBS697G datasheet and verified under CL = 50 pF load conditions.

Which package type does the SN74LVTH16952DLG4 use, and what are its key mechanical dimensions?

The SN74LVTH16952DLG4 uses the SSOP (Shrink Small-Outline Package) with designation DL, featuring 56 pins, 0.5 mm pitch, and overall dimensions of 13.9 mm × 7.9 mm × 1.2 mm max height. Pin 1 is identified by a corner chamfer, and the package complies with JEDEC MO-153 standards, as documented in TI's DGG0056A outline drawing.

SN74LVTH16952DLG4 Specifications

Product attributes: Attribute value

Manufacturer:: Texas Instruments

Series:: 74LVTH

Package/Case:: 56-BSSOP (0.295", 7.50mm Width)

Packaging:: Tube

Product Status:: Discontinued at Digi-Key

Logic Type:: Transceiver, Non-Inverting

Number of Elements:: 2

Number of Bits per Element:: 8

Input Type:: -

Output Type:: 3-State

Current - Output High, Low:: 32mA, 64mA

Voltage - Supply:: 2.7V ~ 3.6V

Operating Temperature:: -40°C ~ 85°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 56-SSOP

SN74LVTH16952DLG4 FAQ

1.How can I place an order for SN74LVTH16952DLG4 through Aetrix?

Please submit a Request for Quotation (RFQ) for SN74LVTH16952DLG4 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for SN74LVTH16952DLG4 reliable?

The price and inventory of SN74LVTH16952DLG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74LVTH16952DLG4 is usually 5 days.

3.What payment methods are accepted for SN74LVTH16952DLG4?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74LVTH16952DLG4 transactions.

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4.How is shipping managed for SN74LVTH16952DLG4?

SN74LVTH16952DLG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SN74LVTH16952DLG4 order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for SN74LVTH16952DLG4?

For technical support, including SN74LVTH16952DLG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74LVTH16952DLG4 requirements.

6.How does Aetrix verify that SN74LVTH16952DLG4 is sourced from the original manufacturer or authorized distributors?

All SN74LVTH16952DLG4 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that SN74LVTH16952DLG4 meets industry standards.

7.What is the process for return or replacement of SN74LVTH16952DLG4?

All SN74LVTH16952DLG4 units undergo pre-shipment inspection (PSI). If there is an issue with SN74LVTH16952DLG4, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The SN74LVTH16952DLG4 part is unused and in its original packaging.

Return procedure for SN74LVTH16952DLG4:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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