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

Texas Instruments SN74ABT16952DLRG4

Name: SN74ABT16952DLRG4
Brand: Texas Instruments
SKU: SN74ABT16952DLRG4
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SN74ABT16952DLRG4

Manufacturer:: Texas Instruments

Category:: Buffers, Drivers, Receivers, Transceivers

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

Datasheet:: SN74ABT16952DLRG4.pdf

Description:: IC TXRX NON-INVERT 5.5V 56SSOP

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Product details

Overview

SN74ABT16952DLRG4 from Texas Instruments is a 16-bit registered transceiver with 3-state outputs in a 56-pin SSOP (DL) package, operating from –40°C to 85°C at 4.5–5.5 V supply. It features dual 8-bit register banks, high-drive outputs (–32 mA IOH / 64 mA IOL), and flow-through pinout for optimized PCB layout. It is used in backplane data buffering and bidirectional bus isolation in industrial control systems.

For engineers reviewing the SN74ABT16952DLRG4 datasheet, SN74ABT16952DLRG4 pinout, SN74ABT16952DLRG4 application, or SN74ABT16952DLRG4 equivalent, key selection criteria include registered A/B port timing (t_su = 3.5 ns, t_h = 1 ns), 3-state enable behavior (OEAB/OEBA active-low), thermal performance (θ_JA = 74°C/W), and compatibility with 5-V TTL logic families.

Technical Context

The SN74ABT16952DLRG4 implements two independent 8-bit D-type flip-flop banks-one for A-to-B and one for B-to-A data flow-each controlled by dedicated clock (CLKAB/CLKBA) and clock-enable (CLKENAB/CLKENBA) inputs. Data latching occurs on the low-to-high transition of the respective clock when its clock-enable is low.

Output-enable signals OEAB and OEBA independently control 3-state output drivers per port, with guaranteed high-impedance during power-up when OE is pulled up to V_CC. The device uses EPIC-II^B BiCMOS technology to achieve low ground bounce (V_OLP < 1 V) and latch-up immunity exceeding 500 mA per JESD-17.

Key Specifications

Parameter	Value and Actual Design Meaning
Supply Voltage	4.5 V to 5.5 V - compatible with standard 5-V TTL and CMOS systems without level-shifting.
Operating Temperature	–40°C to +85°C - qualified for industrial-grade embedded applications with thermal cycling.
Max Clock Frequency	150 MHz - supports high-speed synchronous bus transfers between memory and peripheral subsystems.
Output Drive Strength	–32 mA IOH / 64 mA IOL - drives heavy capacitive loads (e.g., long traces or multiple inputs) without external buffers.
Propagation Delay	t_PLH/t_PHL ≤ 4.6 ns (max) - ensures tight timing margins in 100+ MHz data paths.
Input Setup/Hold Time	t_su = 3.5 ns, t_h = 1 ns - enables reliable capture from fast asynchronous sources like FPGA I/O or microcontroller GPIO.
Thermal Resistance	θ_JA = 74°C/W (DL package) - allows operation at full drive strength in compact enclosures without forced airflow.

Pinout & Package

SN74ABT16952DLRG4 is housed in a 56-pin Shrink Small-Outline Package (SSOP-DL), 300-mil body width, with 0.025-inch (0.635 mm) lead pitch and gull-wing leads. The package features distributed V_CC/GND pins to minimize switching noise and supports JEDEC-standard reflow profiles (MSL Level-1).

Pin/Terminal	Circuit Role	Design Meaning
1OEAB, 2OEAB, 1OEBA, 2OEBA	Active-low 3-state output enables	Independently disable A→B or B→A outputs; tie high via pullup for power-up high-Z safety.
1CLKAB, 2CLKAB, 1CLKBA, 2CLKBA	Positive-edge clock inputs	Trigger register capture on rising edge; each pair controls one 8-bit channel directionally.
1CLKENAB, 2CLKENAB, 1CLKENBA, 2CLKENBA	Active-low clock enable inputs	Gating function: clock only active when CLKEN = L; prevents spurious latching during control transitions.
1A1–1A8, 2A1–2A8, 1B1–1B8, 2B1–2B8	Bidirectional data I/O terminals	Two 8-bit ports per side; no internal direction control - direction set by external OE and clock routing.
V_CC, GND	Power and ground	Multiple distributed pins reduce simultaneous switching noise and improve signal integrity on high-speed buses.

Key Features

Feature	Design Value
Flow-through architecture	Input and output pins arranged opposite each other on package edges - minimizes trace crossovers and layer count in dense PCB layouts.
Distributed V_CC/GND pinning	Eight V_CC and eight GND pins interleaved across the package - lowers power delivery impedance and suppresses ground bounce (V_OLP < 1 V).
High-drive 3-state outputs	–32 mA source / +64 mA sink capability - eliminates need for external bus drivers in multi-drop 5-V TTL systems.
Latch-up immunity	>500 mA per JESD-17 - ensures robustness against transient overcurrent events in noisy industrial environments.
EPIC-II^B BiCMOS process	Combines bipolar speed and CMOS density - achieves 150 MHz clock rate with sub-5 ns propagation delay and low static current (I_CC = 2 mA typ. disabled).

Applications

Backplane Data Buffering	Industrial PLC I/O Expansion
Use Scenario: Isolating and regenerating parallel data between CPU and remote I/O modules across a 12-inch backplane with >30 pF/inch trace capacitance. IC Role / Device Role / Timing Role: Registered transceiver providing setup/hold margin extension and noise-immune data staging between mismatched clock domains. Use Value: Enables reliable 100-MHz burst transfers using the 3.5 ns setup time and distributed power pins to suppress simultaneous switching noise.	Use Scenario: Interfacing a 16-bit microcontroller data bus to modular analog/digital I/O cards in a DIN-rail mounted PLC chassis. IC Role / Device Role / Timing Role: Bidirectional bus isolator with register staging to decouple controller timing from slower peripheral response times. Use Value: Eliminates bus contention during hot-swap events via independent OEAB/OEBA control and guarantees high-Z on power-up with pullup-resistor biasing.
Memory Subsystem Interface	Test Equipment Bus Arbitration
Use Scenario: Connecting an FPGA-based memory controller to dual-port SRAM banks with separate read/write enable timing. IC Role / Device Role / Timing Role: Registered data path element synchronizing asynchronous SRAM access strobes to the controller's system clock domain. Use Value: Provides deterministic 150 MHz throughput using the 1 ns hold time and low-skew clock distribution across both 8-bit register banks.	Use Scenario: Managing shared GPIB or VXI data lines among multiple instrument controllers in automated test racks. IC Role / Device Role / Timing Role: Direction-controlled bus transceiver enabling dynamic master/slave role switching without hardware reconfiguration. Use Value: Supports glitch-free bus handoff using independent CLKENAB/CLKENBA gating and 3-state overlap timing verified per SCBS082C timing diagrams.

Backplane Data Buffering

Industrial PLC I/O Expansion

Use Scenario: Isolating and regenerating parallel data between CPU and remote I/O modules across a 12-inch backplane with >30 pF/inch trace capacitance.

IC Role / Device Role / Timing Role: Registered transceiver providing setup/hold margin extension and noise-immune data staging between mismatched clock domains.

Use Value: Enables reliable 100-MHz burst transfers using the 3.5 ns setup time and distributed power pins to suppress simultaneous switching noise.

Use Scenario: Interfacing a 16-bit microcontroller data bus to modular analog/digital I/O cards in a DIN-rail mounted PLC chassis.

IC Role / Device Role / Timing Role: Bidirectional bus isolator with register staging to decouple controller timing from slower peripheral response times.

Use Value: Eliminates bus contention during hot-swap events via independent OEAB/OEBA control and guarantees high-Z on power-up with pullup-resistor biasing.

Memory Subsystem Interface

Test Equipment Bus Arbitration

Use Scenario: Connecting an FPGA-based memory controller to dual-port SRAM banks with separate read/write enable timing.

IC Role / Device Role / Timing Role: Registered data path element synchronizing asynchronous SRAM access strobes to the controller's system clock domain.

Use Value: Provides deterministic 150 MHz throughput using the 1 ns hold time and low-skew clock distribution across both 8-bit register banks.

Use Scenario: Managing shared GPIB or VXI data lines among multiple instrument controllers in automated test racks.

IC Role / Device Role / Timing Role: Direction-controlled bus transceiver enabling dynamic master/slave role switching without hardware reconfiguration.

Use Value: Supports glitch-free bus handoff using independent CLKENAB/CLKENBA gating and 3-state overlap timing verified per SCBS082C timing diagrams.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
SN74ABT162245DLR	Non-registered 16-bit bus transceiver; no clock or register functionality; higher drive (–64 mA / +64 mA).	Suitable only for combinatorial bus isolation - cannot replace registered timing or data staging requirements.	Select only if application does not require synchronous data capture or clock-domain bridging.
SN74LVTH16952GR	Lower-voltage (3.3 V) registered transceiver; 16-bit; same pinout but incompatible V_CC range and logic thresholds.	Requires level-shifting for 5-V systems; unsuitable for direct drop-in replacement in legacy 5-V designs.	Choose only for new 3.3-V designs where power reduction and lower EMI are prioritized over 5-V compatibility.

Compared with SN74ABT16952DLRG4, SN74ABT162245DLR lacks registration and timing control, making it inadequate for synchronous bus bridging, while SN74LVTH16952GR operates at 3.3 V and cannot interface directly with 5-V TTL without translation - neither offers functional equivalence in registered 5-V applications.

Availability

SN74ABT16952DLRG4 is available at Aetrix Electronics and suitable for industrial automation, test equipment, and legacy 5-V embedded computing applications requiring stable component supply and long-term lifecycle support.

Supply support for SN74ABT16952DLRG4 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 U.S.-based semiconductor company founded in 1930, specializing in analog, embedded processing, and logic solutions for industrial, automotive, and communications markets.

The SN74ABT16952DLRG4 belongs to TI's Widebus™ family of high-speed logic devices, designed specifically for noise-tolerant, high-drive 5-V bus interfacing in demanding industrial and instrumentation systems.

FAQ

What is the recommended power-up sequence for SN74ABT16952DLRG4 to ensure high-impedance outputs?

TI specifies that OEAB and OEBA must be held high during power-up to guarantee 3-state outputs. This is achieved by connecting each OE pin to V_CC through a pullup resistor; the minimum resistance is determined by the driver's current-sinking capability. For SN74ABT16952DLRG4, a 4.7-kΩ resistor is commonly used. This ensures no bus contention before firmware initializes clock and enable controls.

Does SN74ABT16952DLRG4 support hot-swap operation on live 5-V buses?

SN74ABT16952DLRG4 supports hot-swap operation when OEAB and OEBA are externally controlled and asserted high before insertion. Its latch-up immunity (>500 mA per JESD-17) and input clamp current rating (–18 mA) provide tolerance to transient overvoltage during connection. However, TI does not specify full hot-swap qualification - external current-limiting or sequencing circuitry is recommended for repeated insertions.

Can SN74ABT16952DLRG4 be used as two independent 8-bit transceivers, and how are their clocks isolated?

Yes - SN74ABT16952DLRG4 contains two fully independent 8-bit registered transceiver sections: channels 1 and 2 on both A and B sides. Each section has dedicated CLKAB/CLKBA and CLKENAB/CLKENBA inputs, allowing completely separate clock domains. No internal coupling exists between them, enabling asynchronous operation - e.g., A→B data at 100 MHz while B→A runs at 25 MHz.

What is the maximum capacitive load SN74ABT16952DLRG4 can drive while maintaining 150 MHz operation?

Per TI's switching characteristics (CL = 50 pF), SN74ABT16952DLRG4 maintains 150 MHz f_max under standard test conditions. Its output capacitance (C_io = 8.5 pF) and drive strength (64 mA IOL) allow stable operation into ≥70 pF total load (including trace + receiver input). For heavier loads, propagation delay increases linearly - at 100 pF, t_PHL rises to ~6.5 ns, reducing usable frequency to ~80 MHz.

Is SN74ABT16952DLRG4 RoHS compliant and what is its moisture sensitivity level?

Yes, SN74ABT16952DLRG4 is RoHS compliant (lead-free NiPdAu finish) and rated MSL Level-1 (unlimited floor life at ≤30°C/60% RH), per TI's packaging addendum. The DL package uses standard reflow profile peak temperature of 260°C, and the device is qualified for industrial temperature range (–40°C to +85°C) with full traceability from TI's Dallas fabrication site.

SN74ABT16952DLRG4 Specifications

Product attributes: Attribute value

Manufacturer:: Texas Instruments

Series:: 74ABT

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

Packaging:: Tape & Reel (TR)

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:: 4.5V ~ 5.5V

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

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 56-SSOP

SN74ABT16952DLRG4 FAQ

1.How can I place an order for SN74ABT16952DLRG4 through Aetrix?

Please submit a Request for Quotation (RFQ) for SN74ABT16952DLRG4 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 SN74ABT16952DLRG4 reliable?

The price and inventory of SN74ABT16952DLRG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74ABT16952DLRG4 is usually 5 days.

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Once your SN74ABT16952DLRG4 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 SN74ABT16952DLRG4?

For technical support, including SN74ABT16952DLRG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74ABT16952DLRG4 requirements.

6.How does Aetrix verify that SN74ABT16952DLRG4 is sourced from the original manufacturer or authorized distributors?

All SN74ABT16952DLRG4 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 SN74ABT16952DLRG4 meets industry standards.

7.What is the process for return or replacement of SN74ABT16952DLRG4?

All SN74ABT16952DLRG4 units undergo pre-shipment inspection (PSI). If there is an issue with SN74ABT16952DLRG4, 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 SN74ABT16952DLRG4 part is unused and in its original packaging.

Return procedure for SN74ABT16952DLRG4:

1.Submit a request within 90 days.

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

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