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

Texas Instruments SN74ABT16652DLR

Name: SN74ABT16652DLR
Brand: Texas Instruments
SKU: SN74ABT16652DLR
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SN74ABT16652DLR

Manufacturer:: Texas Instruments

Category:: Buffers, Drivers, Receivers, Transceivers

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

Datasheet:: SN74ABT16652DLR.pdf

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

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Product details

Overview

SN74ABT16652DLR from Texas Instruments is a 16-bit bus transceiver and register IC with 3-state outputs, designed for high-speed bidirectional data flow between two 16-bit buses (A and B). It supports real-time or registered data transfer via dual clock (CLKAB/CLKBA) and select (SAB/SBA) controls, delivers ±32-mA/±64-mA drive strength, and operates at up to 125 MHz across –40°C to 85°C.

For engineers reviewing the SN74ABT16652DLR datasheet, SN74ABT16652DLR pinout, SN74ABT16652DLR application, or SN74ABT16652DLR equivalent, key selection criteria include its dual 8-bit/multiplexed 16-bit bus management capability, latch-enabled storage without external logic, distributed V_CC/GND pinning for noise suppression, and compatibility with 5-V TTL-level systems requiring robust bus isolation and timing control.

Technical Context

The SN74ABT16652DLR integrates two independent 8-bit D-type flip-flop banks (A-side and B-side), each with dedicated clock, select, and output-enable inputs-enabling simultaneous or staggered latching of A- or B-bus data. Its flow-through architecture and distributed power/ground pins minimize switching noise in high-density PCB layouts.

Real-time transfer is selected by low SAB/SBA; stored-data transfer requires high SAB/SBA and synchronized CLKAB/CLKBA edges. Output-enable logic (OEAB/OEBA) independently controls A→B and B→A directionality, while internal clamping and 500-mA JEDEC latch-up immunity support industrial reliability.

Key Specifications

Parameter	Value and Actual Design Meaning
Supply Voltage	4.5 V to 5.5 V - ensures compatibility with standard 5-V TTL and mixed-voltage backplane interfaces.
Max Clock Frequency	125 MHz - supports high-throughput synchronous bus bridging in memory controllers and FPGA I/O expansion.
Output Drive	–32 mA (IOH), +64 mA (IOL) - drives heavy capacitive loads (e.g., >50 pF traces or multiple TTL inputs) without external buffers.
Propagation Delay	tPLH/tPHL ≤ 4.9 ns (A↔B) - enables sub-8 ns round-trip latency critical for real-time inter-processor communication.
Operating Temperature	–40°C to +85°C - qualified for commercial/industrial embedded systems including telecom line cards and PLC backplanes.
Package	56-pin SSOP (DL), 300-mil width - surface-mount compatible with automated assembly; 0.65-mm pitch allows dense routing on 4-layer boards.
Input Hysteresis	100 mV - rejects noise on control lines (OE, S, CLK) in electrically noisy environments like motor drives or power supplies.

Pinout & Package

SN74ABT16652DLR uses a 56-pin Shrink Small-Outline Package (SSOP-DL), 300-mil body width, with gull-wing leads and 0.65-mm pitch. Pin 1 is located in Quadrant Q1 per tape-and-reel orientation.

Pin/Terminal	Circuit Role	Design Meaning
1OEAB, 2OEAB, 1OEBA, 2OEBA	Output Enable (A↔B)	Active-low enables bidirectional data flow: OEAB = L enables A→B; OEBA = L enables B→A.
1CLKAB, 2CLKAB, 1CLKBA, 2CLKBA	Register Clock Input	Rising-edge triggered; latches A- or B-bus data into internal D-flip-flops regardless of OE/S state.
1SAB, 2SAB, 1SBA, 2SBA	Select Control	High = route stored data; Low = route real-time bus data - eliminates multiplexer glitch during mode transitions.
1A1–1A8, 2A1–2A8, 1B1–1B8, 2B1–2B8	Bidirectional Data I/O	True 16-bit dual-port interface: A-side connects to one bus domain; B-side to another - no internal direction register required.
V_CC (Pins 7, 22, 36, 46, 50)	Power Supply	Distributed V_CC pins reduce simultaneous switching noise and improve PDN impedance across high-speed operation.
GND (Pins 4, 11, 25, 33, 40, 53)	Ground Reference	Six GND pins provide low-inductance return paths, critical for maintaining signal integrity at >100 MHz edge rates.

Key Features

Feature	Design Value
Flow-through architecture	Pin-compatible A/B bus layout minimizes trace length and layer swaps - reduces PCB area by ~25% vs. staggered packages.
Dual 8-bit or unified 16-bit mode	Configurable as two independent 8-bit transceivers (e.g., separate address/data paths) or one 16-bit channel - increases system flexibility without redesign.
Glitch-free select control	Hardware-decoded SAB/SBA logic prevents metastability during real-time ↔ stored-data transitions - eliminates need for external synchronizers.
High-drive 3-state outputs	–32 mA / +64 mA drive sustains signal integrity across 15-cm FR4 traces loaded with 10+ TTL inputs - avoids bus contention in multi-drop topologies.
Latch-up immunity	Exceeds 500 mA per JEDEC JESD-17 - protects against EOS events in hot-plug or power-rail sequencing scenarios.

Applications

Memory Subsystem Interface	FPGA-to-ASIC Bridge
Use Scenario: Interfacing a 16-bit SRAM or Flash memory bus to a microcontroller with mismatched timing or voltage domains. IC Role / Device Role / Timing Role: Acts as a registered bus buffer: stores memory read data on CLKBA edge, then forwards it to MCU on next cycle - decoupling setup/hold timing violations. Use Value: Enables reliable 125-MHz burst reads without adding wait states or external FIFOs - improves effective memory bandwidth by 30%.	Use Scenario: Connecting a Xilinx Artix-7 FPGA's general-purpose I/O bank to a legacy ASIC with strict 5-V TTL signaling and synchronous handshake requirements. IC Role / Device Role / Timing Role: Provides level-shifted, registered, and direction-controlled data path between FPGA (3.3-V LVCMOS) and ASIC (5-V TTL), with OEAB/OEBA driven by FPGA control logic. Use Value: Eliminates need for discrete level shifters and direction-control logic - reduces BOM count by 7 components and layout area by 18 mm².
Industrial Backplane Hub	Dual-Processor Coherency Link
Use Scenario: Managing shared data exchange between three PLC modules over a common 16-bit parallel backplane operating at 80 MHz. IC Role / Device Role / Timing Role: Functions as a time-multiplexed bus arbitrator: stores Module A's status word on CLKAB, then broadcasts it to Modules B/C via real-time B→A transfer - enforcing deterministic access. Use Value: Achieves <100-ns inter-module latency with zero software overhead - meets IEC 61131-3 cyclic task jitter requirements (<250 ns).	Use Scenario: Synchronizing instruction cache updates between two ARM Cortex-A9 cores sharing L2 memory via a parallel coherency bus. IC Role / Device Role / Timing Role: Buffers and registers snoop request/response packets between cores; uses SAB/SBA to alternate between real-time command forwarding and buffered response replay. Use Value: Prevents race conditions during cache invalidation sequences - eliminates observed 0.8% coherency failure rate in unbuffered implementations.

Memory Subsystem Interface

FPGA-to-ASIC Bridge

Use Scenario: Interfacing a 16-bit SRAM or Flash memory bus to a microcontroller with mismatched timing or voltage domains.

IC Role / Device Role / Timing Role: Acts as a registered bus buffer: stores memory read data on CLKBA edge, then forwards it to MCU on next cycle - decoupling setup/hold timing violations.

Use Value: Enables reliable 125-MHz burst reads without adding wait states or external FIFOs - improves effective memory bandwidth by 30%.

Use Scenario: Connecting a Xilinx Artix-7 FPGA's general-purpose I/O bank to a legacy ASIC with strict 5-V TTL signaling and synchronous handshake requirements.

IC Role / Device Role / Timing Role: Provides level-shifted, registered, and direction-controlled data path between FPGA (3.3-V LVCMOS) and ASIC (5-V TTL), with OEAB/OEBA driven by FPGA control logic.

Use Value: Eliminates need for discrete level shifters and direction-control logic - reduces BOM count by 7 components and layout area by 18 mm².

Industrial Backplane Hub

Dual-Processor Coherency Link

Use Scenario: Managing shared data exchange between three PLC modules over a common 16-bit parallel backplane operating at 80 MHz.

IC Role / Device Role / Timing Role: Functions as a time-multiplexed bus arbitrator: stores Module A's status word on CLKAB, then broadcasts it to Modules B/C via real-time B→A transfer - enforcing deterministic access.

Use Value: Achieves <100-ns inter-module latency with zero software overhead - meets IEC 61131-3 cyclic task jitter requirements (<250 ns).

Use Scenario: Synchronizing instruction cache updates between two ARM Cortex-A9 cores sharing L2 memory via a parallel coherency bus.

IC Role / Device Role / Timing Role: Buffers and registers snoop request/response packets between cores; uses SAB/SBA to alternate between real-time command forwarding and buffered response replay.

Use Value: Prevents race conditions during cache invalidation sequences - eliminates observed 0.8% coherency failure rate in unbuffered implementations.

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
SN74ABT162245DLR	Octal (8-bit), non-registering, no clock/select inputs - only real-time bidirectional transfer.	Cannot store or time-align data; lacks glitch-free mode switching.	Choose when only level translation and drive strength are needed - not for registered buffering or bus arbitration.
SN74LVTH16652DLR	Lower voltage (3.3-V core), reduced drive (–24/+24 mA), 100-MHz max clock - optimized for LVCMOS systems.	Not 5-V tolerant; unsuitable for legacy 5-V backplanes or mixed-signal noise environments.	Prefer for new 3.3-V designs targeting lower power; avoid where 5-V interoperability or 125-MHz throughput is mandatory.

Compared with SN74ABT16652DLR, SN74ABT162245DLR sacrifices registration and mode control for smaller footprint and lower cost, while SN74LVTH16652DLR trades voltage robustness and speed for energy efficiency - making SN74ABT16652DLR the sole choice for 5-V, high-speed, registered bus management.

Availability

SN74ABT16652DLR is available at Aetrix Electronics and suitable for industrial automation backplanes, FPGA I/O expansion modules, and memory subsystem interfaces requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.

Supply support for SN74ABT16652DLR 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 heritage in high-reliability interface ICs.

The SN74ABT16652DLR belongs to TI's Widebus™ family of advanced bus interface devices, engineered specifically for noise-immune, high-speed parallel data transfer in industrial, telecom, and computing infrastructure.

FAQ

What is the maximum clock frequency supported by the SN74ABT16652DLR?

The SN74ABT16652DLR supports a maximum clock frequency of 125 MHz under recommended operating conditions (V_CC = 5 V, T_A = 25°C). This rating is validated across the full industrial temperature range (–40°C to +85°C), with timing parameters including t_su = 3 ns and t_PLH/t_PHL ≤ 4.9 ns ensuring reliable operation at this rate. The SN74ABT16652DLR achieves this performance using TI's EPIC-II^B BiCMOS process, which balances speed and power efficiency.

How does the SN74ABT16652DLR handle power-up and power-down sequencing?

To ensure defined high-impedance states during power transitions, SN74ABT16652DLR requires OEBA to be tied to V_CC via a pullup resistor (value set by driver sink capability), and OEAB to be tied to GND via a pulldown resistor (value set by driver source capability). This prevents bus contention before logic initialization. The SN74ABT16652DLR's I_off specification (±100 µA at V_CC = 0) further guarantees isolation when powered down.

Can the SN74ABT16652DLR operate with 3.3-V input signals while powered at 5 V?

Yes - the SN74ABT16652DLR accepts 3.3-V logic inputs at its control (OE, S, CLK) and data (A/B) terminals when V_CC = 5 V, as confirmed by its VIH = 2.0 V and VIL = 0.8 V specifications. Its input structure is TTL-compatible, allowing direct interfacing with 3.3-V CMOS outputs without level shifters. However, all outputs swing rail-to-rail (0 V to 5 V), so downstream 3.3-V receivers must be 5-V tolerant.

What is the purpose of the distributed V_CC and GND pins on the SN74ABT16652DLR?

The SN74ABT16652DLR places five V_CC and six GND pins across the 56-pin SSOP package to minimize simultaneous switching noise and reduce power delivery network (PDN) impedance. This distributed configuration lowers ground bounce (V_OLP < 1 V typical) and maintains signal integrity at high edge rates (>100 MHz), directly supporting its 125-MHz operation and enabling cleaner timing margins in dense PCB layouts.

Does the SN74ABT16652DLR support hot-swap or live-insertion applications?

The SN74ABT16652DLR supports hot-swap operation due to its I_off specification (±100 µA at V_CC = 0) and robust latch-up immunity (>500 mA per JESD-17). When V_CC is unpowered, all I/Os enter high-impedance state with minimal leakage, preventing backdrive into live backplanes. For full hot-swap compliance, external current-limiting resistors on OEAB/OEBA and proper sequencing of V_CC ramp-up are recommended per TI application notes.

SN74ABT16652DLR 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:: 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:: 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

SN74ABT16652DLR FAQ

1.How can I place an order for SN74ABT16652DLR through Aetrix?

Please submit a Request for Quotation (RFQ) for SN74ABT16652DLR 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 SN74ABT16652DLR reliable?

The price and inventory of SN74ABT16652DLR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74ABT16652DLR is usually 5 days.

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SN74ABT16652DLR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SN74ABT16652DLR 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 SN74ABT16652DLR?

For technical support, including SN74ABT16652DLR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74ABT16652DLR requirements.

6.How does Aetrix verify that SN74ABT16652DLR is sourced from the original manufacturer or authorized distributors?

All SN74ABT16652DLR 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 SN74ABT16652DLR meets industry standards.

7.What is the process for return or replacement of SN74ABT16652DLR?

All SN74ABT16652DLR units undergo pre-shipment inspection (PSI). If there is an issue with SN74ABT16652DLR, 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 SN74ABT16652DLR part is unused and in its original packaging.

Return procedure for SN74ABT16652DLR:

1.Submit a request within 90 days.

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

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