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Texas Instruments SN74LVCH16952ADGGR

Name: SN74LVCH16952ADGGR
Brand: Texas Instruments
SKU: SN74LVCH16952ADGGR
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SN74LVCH16952ADGGR

Manufacturer:: Texas Instruments

Category:: Buffers, Drivers, Receivers, Transceivers

Package:: 56-TFSOP (0.240", 6.10mm Width)

Datasheet:: SN74LVCH16952ADGGR.pdf

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

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Product details

Overview

SN74LVCH16952ADGGR from Texas Instruments is a 16-bit registered transceiver with 3-state outputs, designed for bidirectional data flow between A and B buses in 1.65-V to 3.6-V systems. It features dual 8-bit register sets, bus-hold inputs, Ioff partial-power-down support, and mixed-mode 5-V-tolerant inputs with 3.3-V VCC - enabling use in 3.3-V/5-V level translation applications such as memory interface buffers and backplane data routing.

For engineers reviewing the SN74LVCH16952ADGGR datasheet, SN74LVCH16952ADGGR pinout, SN74LVCH16952ADGGR application, or SN74LVCH16952ADGGR equivalent, key selection considerations include its 56-pin TSSOP (DGG) package, 6.6 ns max propagation delay at 3.3 V, 150 MHz max clock frequency, bus-hold functionality eliminating external resistors, and Ioff protection for hot-swap and power sequencing scenarios.

Technical Context

The SN74LVCH16952ADGGR implements two independent 8-bit D-type register banks - one for A-to-B and another for B-to-A data flow - each controlled by dedicated clock (CLKAB/CLKBA), clock-enable (CEAB/CEBA), and output-enable (OEAB/OEBA) signals. Its dual-register architecture supports synchronous latching on either bus direction without internal arbitration logic.

It integrates bus-hold circuitry on all A and B data inputs (1A1–1A8, 1B1–1B8, 2A1–2A8, 2B1–2B8), ensuring stable logic levels on floating inputs without external pullups. The Ioff feature disables all outputs during power-down, blocking current backflow when VCC = 0 V while inputs remain at 5.5 V - critical for mixed-voltage system interoperability and hot-plug compliance.

Key Specifications

Parameter	Value and Actual Design Meaning
VCC Range	1.65 V to 3.6 V - enables direct integration into low-voltage 1.8-V and 2.5-V logic domains while maintaining compatibility with 3.3-V infrastructure.
Input Voltage Tolerance	Up to 5.5 V - allows interfacing with legacy 5-V peripherals without level-shifting circuitry, supporting mixed-mode signal operation.
Max Propagation Delay	6.6 ns at VCC = 3.3 V - ensures sub-7-ns timing margin for high-speed 100+ MHz data transfers in registered bus architectures.
Max Clock Frequency	150 MHz at VCC = 3.3 V - supports high-throughput synchronous data transfer in memory expansion, FPGA I/O bridging, and industrial controller backplanes.
Bus-Hold Current	±45 µA at VI = 1.7 V (VCC = 3 V) - actively maintains valid logic states on unused data lines, removing need for 10-kΩ external bias resistors.
Ioff Leakage	±10 µA at VI or VO = 5.5 V, VCC = 0 V - prevents damaging reverse current during partial power-down, meeting JEDEC JESD78 requirements.
Output Drive Strength	±24 mA at VCC = 3 V - sufficient to drive 50-Ω transmission lines or fan-out to ≥10 LVTTL loads under worst-case conditions.
ESD Protection	2000-V HBM, 200-V MM, 1000-V CDM - exceeds industry standard robustness for handling in automated assembly and field-replaceable modules.

Pinout & Package

TSSOP-56 (DGG) package: 14.1 mm × 6.2 mm × 1.2 mm body, 0.5-mm lead pitch, exposed metal pad not present, RoHS-compliant NiPdAu finish, MSL Level-1.

Pin/Terminal	Circuit Role	Design Meaning
1OEAB, 2OEAB, 1OEBA, 2OEBA	Output Enable (active-low)	Controls 3-state output drivers per register bank; low enables A↔B data path, high places outputs in high-impedance state for bus sharing.
1CLKAB, 2CLKAB, 1CLKBA, 2CLKBA	Register Clock (rising-edge triggered)	Samples data from A or B bus into respective flip-flop on CLK↑; synchronizes data transfer across voltage domains.
1CEAB, 2CEAB, 1CEBA, 2CEBA	Register Clock Enable (active-low)	Gates clock action - low permits latching on CLK↑, high holds register contents unchanged regardless of clock transitions.
1A1–1A8, 2A1–2A8, 1B1–1B8, 2B1–2B8	Bidirectional Data I/O	Eight-channel A-side and B-side ports; each pin has bus-hold and 5.5-V-tolerant input structure, supporting unidirectional or full-duplex flow.
VCC, GND (×8 total)	Power Distribution	Distributed VCC/GND pairs minimize switching noise and ground bounce; decoupling required per TI layout guidelines (e.g., 0.1-µF ceramic near each VCC).

Key Features

Feature	Design Value
Mixed-mode signal operation	5-V-tolerant inputs with 1.65–3.6-V VCC enable seamless interconnection between 3.3-V FPGAs and 5-V legacy peripherals without external translators.
Integrated bus-hold circuitry	Eliminates need for 10-kΩ external pullup/pulldown resistors on all 32 data lines, reducing BOM count and PCB area in high-density memory interfaces.
Ioff partial-power-down protection	Prevents current backflow when VCC = 0 V but inputs remain at 5.5 V - essential for hot-swap capability in modular industrial controllers and telecom line cards.
Low ground bounce (VOLP < 0.8 V)	Ensures signal integrity during simultaneous output switching; meets stringent noise budgets in high-speed digital systems operating above 100 MHz.
Widebus™ architecture	Optimized for low-skew, high-fanout parallel bus applications including DDR memory buffers, PCI-X add-in card interfaces, and programmable logic I/O expansion.

Applications

Memory Interface Buffering	FPGA I/O Expansion
Use Scenario: Buffering address/data between a 3.3-V microcontroller and 5-V SRAM or Flash memory in embedded instrumentation. IC Role / Device Role / Timing Role: Registered transceiver providing synchronized, glitch-free data capture and output control via separate CLKAB/OEAB signals. Use Value: Enables reliable 16-bit parallel memory access at up to 150 MHz while tolerating 5-V memory I/O voltages - eliminating discrete level shifters and reducing timing closure effort.	Use Scenario: Extending I/O count of a Xilinx Artix-7 FPGA to drive multiple 3.3-V peripheral buses in an industrial PLC baseboard. IC Role / Device Role / Timing Role: Bidirectional registered buffer that isolates FPGA core logic from external bus loading and provides clock-domain crossing synchronization. Use Value: Delivers deterministic 6.6-ns propagation delay and bus-hold stability on all 32 I/Os - simplifying PCB routing and eliminating need for 32 external termination resistors.
Backplane Data Routing	Mixed-Voltage System Interfacing
Use Scenario: Interfacing a 2.5-V DSP processor module with a 3.3-V ADC/DAC daughterboard over a 16-bit parallel backplane in medical imaging equipment. IC Role / Device Role / Timing Role: Synchronous transceiver registering data on both rising edges of CLKAB and CLKBA to align timing across voltage domains. Use Value: Supports jitter-free data handoff with <7-ns skew between channels, meeting real-time acquisition timing constraints while managing voltage translation.	Use Scenario: Connecting a 1.8-V ASIC to legacy 5-V sensor subsystems in automotive body control modules requiring hot-plug-safe operation. IC Role / Device Role / Timing Role: Level-translating registered buffer with Ioff and bus-hold, enabling safe power sequencing during ignition-on/off transitions. Use Value: Prevents latch-up and backfeed current during partial power-down - certified to exceed 250 mA latch-up immunity per JESD17, meeting AEC-Q100 stress requirements.

Memory Interface Buffering

FPGA I/O Expansion

Use Scenario: Buffering address/data between a 3.3-V microcontroller and 5-V SRAM or Flash memory in embedded instrumentation.

IC Role / Device Role / Timing Role: Registered transceiver providing synchronized, glitch-free data capture and output control via separate CLKAB/OEAB signals.

Use Value: Enables reliable 16-bit parallel memory access at up to 150 MHz while tolerating 5-V memory I/O voltages - eliminating discrete level shifters and reducing timing closure effort.

Use Scenario: Extending I/O count of a Xilinx Artix-7 FPGA to drive multiple 3.3-V peripheral buses in an industrial PLC baseboard.

IC Role / Device Role / Timing Role: Bidirectional registered buffer that isolates FPGA core logic from external bus loading and provides clock-domain crossing synchronization.

Use Value: Delivers deterministic 6.6-ns propagation delay and bus-hold stability on all 32 I/Os - simplifying PCB routing and eliminating need for 32 external termination resistors.

Backplane Data Routing

Mixed-Voltage System Interfacing

Use Scenario: Interfacing a 2.5-V DSP processor module with a 3.3-V ADC/DAC daughterboard over a 16-bit parallel backplane in medical imaging equipment.

IC Role / Device Role / Timing Role: Synchronous transceiver registering data on both rising edges of CLKAB and CLKBA to align timing across voltage domains.

Use Value: Supports jitter-free data handoff with <7-ns skew between channels, meeting real-time acquisition timing constraints while managing voltage translation.

Use Scenario: Connecting a 1.8-V ASIC to legacy 5-V sensor subsystems in automotive body control modules requiring hot-plug-safe operation.

IC Role / Device Role / Timing Role: Level-translating registered buffer with Ioff and bus-hold, enabling safe power sequencing during ignition-on/off transitions.

Use Value: Prevents latch-up and backfeed current during partial power-down - certified to exceed 250 mA latch-up immunity per JESD17, meeting AEC-Q100 stress requirements.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
SN74LVC16245ADGGR	Non-registered 16-bit transceiver; no clock or CE inputs; only OE-controlled 3-state outputs.	Lacks synchronous registration - unsuitable for clock-domain crossing or metastability-critical paths; used where simple bus isolation suffices.	Select SN74LVC16245ADGGR only if timing synchronization is unnecessary and lower propagation delay (4.8 ns) is prioritized over register functionality.
SN74AVC16T245DGGR	Registered transceiver with auto-direction sensing (no CLK/CE); supports 1.2-V to 3.6-V VCC and higher speed (200 MHz).	Direction control inferred from data flow rather than explicit clocking; lacks bus-hold and Ioff - requires external biasing and power sequencing care.	Choose SN74AVC16T245DGGR for ultra-low-voltage (1.2-V) operation and higher bandwidth, but verify absence of bus-hold meets system noise immunity requirements.

Compared with SN74LVC16245ADGGR and SN74AVC16T245DGGR, the SN74LVCH16952ADGGR uniquely combines synchronous registration, bus-hold, and Ioff in a single 56-pin TSSOP - making it the only option among the three qualified for mixed-voltage hot-swap systems requiring deterministic timing and zero external bias components.

Availability

SN74LVCH16952ADGGR is available at Aetrix Electronics and suitable for memory interface buffering, FPGA I/O expansion, backplane data routing, and mixed-voltage system interfacing requiring stable component supply across industrial, medical, and test equipment production cycles.

Supply support for SN74LVCH16952ADGGR 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 over 50 years of innovation in high-reliability logic and interface solutions.

The SN74LVCH16952ADGGR belongs to TI's Widebus™ family of advanced CMOS logic devices, engineered specifically for high-speed, low-noise, mixed-voltage parallel bus applications in industrial automation, communications infrastructure, and computing platforms.

FAQ

What is the maximum clock frequency supported by the SN74LVCH16952ADGGR?

The SN74LVCH16952ADGGR supports a maximum clock frequency of 150 MHz when operated at VCC = 3.3 V, as specified in the timing characteristics table. At lower supply voltages - 2.7 V and 2.5 V - the maximum frequency remains 150 MHz and 130 MHz respectively. This rating applies to both CLKAB and CLKBA inputs under recommended operating conditions and ensures reliable setup/hold timing margins for synchronous data capture in the SN74LVCH16952ADGGR registers.

Does the SN74LVCH16952ADGGR require external pull-up or pull-down resistors on its data inputs?

No, the SN74LVCH16952ADGGR does not require external pull-up or pull-down resistors on its A or B port data inputs because it integrates active bus-hold circuitry on all 32 data lines. This feature maintains valid logic levels on floating or unused inputs, eliminating the need for discrete biasing components. Using external resistors with the SN74LVCH16952ADGGR bus-hold inputs is explicitly discouraged in the datasheet, as it may interfere with the internal hold current and degrade noise immunity.

Can the SN74LVCH16952ADGGR be used in hot-swap applications where VCC may be powered down while other signals remain active?

Yes, the SN74LVCH16952ADGGR supports hot-swap operation through its Ioff feature, which disables all outputs and blocks current backflow when VCC = 0 V while inputs or outputs are driven up to 5.5 V. This behavior is verified per JESD78 and ensures safe partial-power-down operation - making the SN74LVCH16952ADGGR suitable for modular systems like telecom line cards or server backplanes where boards are inserted or removed under power.

What is the pin-compatible replacement for the SN74LVCH16952ADGGR in the same TSSOP-56 package?

There is no pin-compatible replacement for the SN74LVCH16952ADGGR in the same TSSOP-56 (DGG) package. While SN74LVC16245ADGGR and SN74AVC16T245DGGR share the same footprint, they differ functionally: the former lacks registration and bus-hold, and the latter omits Ioff and uses auto-direction sensing instead of clock/enable controls. None provide identical pinout, register architecture, or mixed-mode tolerance - so PCB redesign is required for substitution.

How does the SN74LVCH16952ADGGR handle level translation between 3.3-V and 5-V logic domains?

The SN74LVCH16952ADGGR handles level translation by accepting 5.5-V-tolerant inputs while operating from a 1.65–3.6-V VCC supply - allowing 5-V signals to drive its A or B ports directly without damage or external clamping. Its outputs swing rail-to-rail within the VCC domain (e.g., 0 V to 3.3 V), enabling clean interfacing from a 3.3-V controller to 5-V peripherals. This mixed-mode operation is intrinsic to the SN74LVCH16952ADGGR silicon design and requires no configuration or external components.

SN74LVCH16952ADGGR Specifications

Product attributes: Attribute value

Manufacturer:: Texas Instruments

Series:: 74LVCH

Package/Case:: 56-TFSOP (0.240", 6.10mm Width)

Packaging:: Tape & Reel (TR)

Product Status:: Active

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:: 24mA, 24mA

Voltage - Supply:: 1.65V ~ 3.6V

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

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 56-TSSOP

SN74LVCH16952ADGGR FAQ

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Please submit a Request for Quotation (RFQ) for SN74LVCH16952ADGGR on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

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The price and inventory of SN74LVCH16952ADGGR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74LVCH16952ADGGR is usually 5 days.

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For technical support, including SN74LVCH16952ADGGR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74LVCH16952ADGGR requirements.

6.How does Aetrix verify that SN74LVCH16952ADGGR is sourced from the original manufacturer or authorized distributors?

All SN74LVCH16952ADGGR 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 SN74LVCH16952ADGGR meets industry standards.

7.What is the process for return or replacement of SN74LVCH16952ADGGR?

All SN74LVCH16952ADGGR units undergo pre-shipment inspection (PSI). If there is an issue with SN74LVCH16952ADGGR, 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 SN74LVCH16952ADGGR part is unused and in its original packaging.

Return procedure for SN74LVCH16952ADGGR:

1.Submit a request within 90 days.

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

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