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Texas Instruments SN74LVCH16652ADGGR

Name: SN74LVCH16652ADGGR
Brand: Texas Instruments
SKU: SN74LVCH16652ADGGR
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SN74LVCH16652ADGGR

Manufacturer:: Texas Instruments

Category:: Buffers, Drivers, Receivers, Transceivers

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

Datasheet:: SN74LVCH16652ADGGR.pdf

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

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Product details

Overview

SN74LVCH16652ADGGR from Texas Instruments is a 16-bit bus transceiver and register with 3-state outputs, designed for bidirectional data flow between two 16-bit buses (A and B) in mixed-voltage systems. It operates from 1.65 V to 3.6 V, accepts 5.5-V-tolerant inputs, delivers 24-mA drive at 3.3 V, and achieves 6.3-ns propagation delay. It supports real-time or registered data transfer via dual clock (CLKAB/CLKBA) and select (SAB/SBA) controls - used in server memory interfaces and high-speed PC chipset interconnects.

For engineers reviewing the SN74LVCH16652ADGGR datasheet, SN74LVCH16652ADGGR pinout, SN74LVCH16652ADGGR application, or SN74LVCH16652ADGGR equivalent, key selection criteria include its dual 8-bit channel architecture, I_off partial-power-down support, bus-hold inputs eliminating external resistors, and guaranteed 125°C operation - critical for thermal-stressed industrial and telecom backplane designs.

Technical Context

The SN74LVCH16652ADGGR integrates two independent 8-bit transceiver sections (1A/1B and 2A/2B), each with dedicated A→B and B→A clock, select, and output-enable controls. Its D-type flip-flops latch data on low-to-high CLKAB/CLKBA transitions, while SAB/SBA selects between real-time pass-through or registered data - enabling glitch-free bus arbitration without external decoding logic.

It implements TI's Widebus™ architecture with true 5-V-tolerant inputs at 3.3-V V_CC, I_off protection disabling current flow when V_CC = 0 V, and active bus-hold on all A/B port I/O pins - ensuring stable logic levels during hot-insertion or partial power-down sequences in modular systems.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CC Range	1.65 V to 3.6 V - enables direct integration into 1.8-V, 2.5-V, and 3.3-V logic domains without level shifters.
Input Voltage Tolerance	Up to 5.5 V - allows interfacing with legacy 5-V peripherals or microcontrollers in mixed-supply systems.
t_pd (Max)	6.3 ns at 3.3 V - supports >100-MHz bus timing margins for DDR2/DDR3 memory buffer applications.
I_OH/I_OL	–24 mA / +24 mA at 3.3 V - drives 10+ LVTTL loads or terminates stubs in point-to-point backplane links.
I_off	<±10 μA at V_CC = 0 V - prevents back-driving powered-down rails during hot-swap or sleep-mode sequencing.
Operating Temperature	–40°C to +125°C - qualified for under-hood automotive ECUs and industrial PLC I/O modules.
ESD Rating	2000-V HBM - meets JEDEC JS-001 for robust handling in automated SMT assembly lines.

Pinout & Package

TSSOP-56 package (14.00 mm × 6.10 mm), 0.5-mm pitch, lead-free (NiPdAu), moisture sensitivity level 1 (260°C peak reflow).

Pin/Terminal	Circuit Role	Design Meaning
1OEAB, 2OEAB	A→B Output Enable (active-high)	Controls 3-state output drivers on A-side ports; tie low to enable A→B data flow.
1OEBA, 2OEBA	B→A Output Enable (active-low)	Controls 3-state output drivers on B-side ports; tie high to enable B→A data flow.
1CLKAB, 2CLKAB	A→B Clock Input	Latches A-port data into internal D-flip-flops on rising edge for registered transfer.
1CLKBA, 2CLKBA	B→A Clock Input	Latches B-port data into internal D-flip-flops on rising edge for registered transfer.
1SAB, 2SAB	A→B Data Select	High = output registered A-data; low = output real-time A-data - no decode glitches.
1SBA, 2SBA	B→A Data Select	High = output registered B-data; low = output real-time B-data - eliminates multiplexer hazards.
1A1–1A8, 2A1–2A8	A-Side I/O Ports	Bi-directional data terminals with bus-hold; tolerate 5.5-V inputs at any V_CC ≥1.65 V.
1B1–1B8, 2B1–2B8	B-Side I/O Ports	Bi-directional data terminals with bus-hold; support hot-swap isolation when OE is inactive.
V_CC (Pins 7, 22, 35, 50)	Power Supply	Four distributed V_CC pins reduce IR drop and improve noise immunity across wide bus traces.
GND (Pins 4, 11, 18, 25, 32, 46, 53)	Ground Reference	Seven GND pins provide low-inductance return paths for high-speed switching currents.

Key Features

Feature	Design Value
Mixed-mode signal operation	5.5-V-tolerant inputs at 1.65–3.6-V V_CC enables seamless 3.3-V ↔ 5-V voltage translation without external components.
I_off partial-power-down support	Blocks current flow between powered and unpowered system domains - essential for PCIe hot-plug and modular server architectures.
Bus-hold on all I/O pins	Eliminates need for external pull-up/pull-down resistors on unused data lines - reduces BOM count and PCB area in dense memory buffers.
Dual independent 8-bit channels	Enables concurrent A↔B and C↔D bus management on single device - cuts component count vs. discrete transceivers in multi-bank DRAM controllers.
Glitch-free data select logic	SAB/SBA control avoids metastability during mode switching - ensures deterministic timing in real-time industrial Ethernet switches.

Applications

Server Memory Buffer	Industrial PLC Backplane
Use Scenario: Isolating and latching DDR3 address/command signals between CPU and memory modules in 1U rack servers. IC Role / Device Role / Timing Role: 16-bit registered transceiver buffering command/address bus with cycle-accurate timing alignment via CLKAB/CLKBA. Use Value: 6.3-ns t_pd and 24-mA drive ensure setup/hold compliance across 12-inch backplane traces at 800 MT/s.	Use Scenario: Interfacing FPGA-based motion controller I/O with legacy 24-V discrete I/O modules over extended temperature ranges. IC Role / Device Role / Timing Role: Bidirectional level translator and bus isolator with I_off protection during module hot-swap events. Use Value: 5.5-V input tolerance and –40°C to +125°C rating maintain signal integrity in factory-floor environments with EMI and thermal cycling.
Network Switch ASIC Interface	Automotive ADAS Domain Controller
Use Scenario: Connecting packet processor ASIC to external SRAM for deep packet inspection buffers in 10-GbE line cards. IC Role / Device Role / Timing Role: High-drive bus transceiver with real-time/store-select capability for burst-mode memory access. Use Value: Bus-hold inputs prevent floating states during ASIC reset sequences - eliminating spurious writes to SRAM during power sequencing.	Use Scenario: Managing sensor data aggregation between radar SoC and CAN-FD gateway in autonomous driving domain controllers. IC Role / Device Role / Timing Role: Registered data interface synchronizing LVDS camera streams to CAN-FD protocol engine clocks. Use Value: Dual-clock domain support (CLKAB/CLKBA) enables asynchronous clock domain crossing without FIFO logic overhead.

Server Memory Buffer

Industrial PLC Backplane

Use Scenario: Isolating and latching DDR3 address/command signals between CPU and memory modules in 1U rack servers.

IC Role / Device Role / Timing Role: 16-bit registered transceiver buffering command/address bus with cycle-accurate timing alignment via CLKAB/CLKBA.

Use Value: 6.3-ns t_pd and 24-mA drive ensure setup/hold compliance across 12-inch backplane traces at 800 MT/s.

Use Scenario: Interfacing FPGA-based motion controller I/O with legacy 24-V discrete I/O modules over extended temperature ranges.

IC Role / Device Role / Timing Role: Bidirectional level translator and bus isolator with I_off protection during module hot-swap events.

Use Value: 5.5-V input tolerance and –40°C to +125°C rating maintain signal integrity in factory-floor environments with EMI and thermal cycling.

Network Switch ASIC Interface

Automotive ADAS Domain Controller

Use Scenario: Connecting packet processor ASIC to external SRAM for deep packet inspection buffers in 10-GbE line cards.

IC Role / Device Role / Timing Role: High-drive bus transceiver with real-time/store-select capability for burst-mode memory access.

Use Value: Bus-hold inputs prevent floating states during ASIC reset sequences - eliminating spurious writes to SRAM during power sequencing.

Use Scenario: Managing sensor data aggregation between radar SoC and CAN-FD gateway in autonomous driving domain controllers.

IC Role / Device Role / Timing Role: Registered data interface synchronizing LVDS camera streams to CAN-FD protocol engine clocks.

Use Value: Dual-clock domain support (CLKAB/CLKBA) enables asynchronous clock domain crossing without FIFO logic overhead.

Equivalent & Alternatives

The following parts are listed as comparable options for similar bus transceiver and register applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
SN74LVC16652DGGR	No bus-hold; max V_CC = 3.6 V but inputs not 5.5-V tolerant; t_pd = 7.1 ns at 3.3 V.	Lower cost for non-mixed-voltage designs where external pull-ups are acceptable and thermal margin <125°C.	Select when 5-V tolerance is unnecessary and BOM cost reduction outweighs bus-hold convenience.
74ALVCH16652TTR	Higher drive (32 mA), wider V_CC range (2.3–3.6 V), but no I_off support and only rated to 85°C.	Better for high-current, short-trace applications like GPU memory interfaces where partial-power-down is not required.	Choose for extreme speed-critical designs with tight layout control and no hot-swap requirements.

Compared with SN74LVC16652DGGR and 74ALVCH16652TTR, the SN74LVCH16652ADGGR uniquely combines 5.5-V input tolerance, I_off, bus-hold, and 125°C operation - making it the only option for thermally demanding, mixed-voltage, hot-pluggable systems requiring zero external biasing.

Availability

SN74LVCH16652ADGGR is available at Aetrix Electronics and suitable for server memory buffers, industrial PLC backplanes, network switch ASIC interfaces, and automotive ADAS domain controllers requiring stable component supply across extended temperature and mixed-voltage conditions.

Supply support for SN74LVCH16652ADGGR 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 logic solutions, with decades of expertise in high-reliability interface ICs for industrial and computing markets.

The SN74LVCH16652ADGGR belongs to TI's Widebus™ family of advanced bus interface devices, engineered specifically for high-speed, mixed-voltage, thermally robust data routing in servers, telecom infrastructure, and automotive control units.

FAQ

What is the maximum clock frequency supported by SN74LVCH16652ADGGR?

The SN74LVCH16652ADGGR supports up to 150 MHz clock frequency across its full operating temperature range (–40°C to +125°C) at V_CC = 2.7 V to 3.3 V. At 1.8 V, the maximum frequency is 120 MHz. These values are specified in the timing requirements tables (Sections 7.6 and 7.7 of the datasheet) and validated under load conditions with CL = 30–50 pF.

Does SN74LVCH16652ADGGR require external pull-up or pull-down resistors on its I/O pins?

No, SN74LVCH16652ADGGR does not require external pull-up or pull-down resistors because it features integrated bus-hold circuitry on all A- and B-side I/O pins. This active circuit maintains valid logic levels on floating inputs, eliminating external biasing components - a key design simplification confirmed in Section 9.1 and Feature Description of the datasheet.

Can SN74LVCH16652ADGGR interface between 3.3-V and 5-V logic systems?

Yes, SN74LVCH16652ADGGR supports mixed-mode operation: its inputs tolerate voltages up to 5.5 V regardless of V_CC (1.65–3.6 V), enabling direct connection to 5-V outputs while powering from 3.3 V. This capability is explicitly documented in the "Features" and "Recommended Operating Conditions" sections of the datasheet.

What is the purpose of the I_off feature in SN74LVCH16652ADGGR?

The I_off feature in SN74LVCH16652ADGGR disables current flow through the device when V_CC = 0 V, preventing back-driving of powered-down system rails. This is critical for hot-swap applications and partial-power-down modes, and is verified by electrical characteristics data showing I_off ≤ ±10 μA at V_CC = 0 V (Section 7.5).

How many power and ground pins does SN74LVCH16652ADGGR have in its TSSOP-56 package?

The SN74LVCH16652ADGGR in TSSOP-56 has four V_CC pins (7, 22, 35, 50) and seven GND pins (4, 11, 18, 25, 32, 46, 53), as shown in the Pin Configuration diagram (Section 6) and confirmed in the mechanical drawings. This distributed power/ground scheme minimizes noise and improves signal integrity for high-speed 16-bit buses.

SN74LVCH16652ADGGR 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 ~ 125°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 56-TSSOP

SN74LVCH16652ADGGR FAQ

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For technical support, including SN74LVCH16652ADGGR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74LVCH16652ADGGR requirements.

6.How does Aetrix verify that SN74LVCH16652ADGGR is sourced from the original manufacturer or authorized distributors?

All SN74LVCH16652ADGGR 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 SN74LVCH16652ADGGR meets industry standards.

7.What is the process for return or replacement of SN74LVCH16652ADGGR?

All SN74LVCH16652ADGGR units undergo pre-shipment inspection (PSI). If there is an issue with SN74LVCH16652ADGGR, 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 SN74LVCH16652ADGGR part is unused and in its original packaging.

Return procedure for SN74LVCH16652ADGGR:

1.Submit a request within 90 days.

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

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