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

Texas Instruments 74AC16652DL

Name: 74AC16652DL
Brand: Texas Instruments
SKU: 74AC16652DL
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 74AC16652DL

Manufacturer:: Texas Instruments

Category:: Buffers, Drivers, Receivers, Transceivers

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

Datasheet:: 74AC16652DL.pdf

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

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Product details

Overview

74AC16652DL from Texas Instruments is a 16-bit bus transceiver and register IC with independent A/B bus control, 3-state outputs, dual clock inputs (CLKAB/CLKBA), and real-time/stored data multiplexing capability. It operates from –40°C to 85°C at 3–5.5 V supply, supports up to 95 MHz clock frequency at 5 V, and features flow-through architecture optimized for PCB layout in high-density digital systems.

For engineers reviewing the 74AC16652DL datasheet, 74AC16652DL pinout, 74AC16652DL application, or 74AC16652DL equivalent, key selection considerations include its dual-register storage mode, glitch-free select control (SAB/SBA), distributed V_CC/GND pin configuration for noise reduction, and compatibility with TI's Widebus™ and EPIC™ CMOS process.

Technical Context

The 74AC16652DL implements two independent 8-bit D-type flip-flop banks-one per bus-with separate clock, output-enable (OEAB/OEBA), and select-control (SAB/SBA) inputs. Its multiplexed real-time/stored data flow-through architecture enables four fundamental bus-management functions: real-time A→B, B→A, stored A→B, and stored B→A transfers-without decoding glitches during mode transitions.

It uses TI's EPIC™ 1-µm CMOS process, delivering 500-mA latch-up immunity at 125°C and low switching noise via distributed power/ground pins. The device supports simultaneous storage on both buses via concurrent CLKAB↑/CLKBA↑, or staggered clocks when SAB/SBA = H, ensuring deterministic register loading behavior across temperature and voltage ranges.

Key Specifications

Parameter	Value and Actual Design Meaning
Supply Voltage	3 V to 5.5 V - supports mixed-voltage system interfacing and legacy 5-V logic compatibility
Operating Temperature	–40°C to +85°C - qualified for industrial-grade embedded and computing applications
Max Clock Frequency	95 MHz at V_CC = 5 V - enables high-speed synchronous bus bridging in real-time control systems
Output Drive	±24 mA at V_CC = 5 V - sufficient to drive 50-pF loads with <10 ns propagation delay (t_PLH/t_PHL)
Propagation Delay	2.7–9.2 ns (A↔B path, V_CC = 5 V) - ensures timing margin in 100-MHz-class backplane or memory interface designs
I/O Capacitance	C_io = 12 pF - minimizes capacitive loading on shared data buses, reducing signal integrity degradation
Latch-Up Immunity	500 mA at 125°C - meets stringent reliability requirements for mission-critical industrial controllers

Pinout & Package

74AC16652DL is housed in a 56-pin shrink small-outline package (SSOP-DL), 300-mil body width, with 25-mil center-to-center pin spacing. The package provides twice the I/O density of standard SOIC while maintaining compatible footprint area.

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 paths; enables bidirectional isolation without external logic
1CLKAB, 2CLKAB, 1CLKBA, 2CLKBA	Register Clock Input	Edge-triggered storage of A- or B-bus data into internal D flip-flops; supports concurrent or staggered loading
1SAB, 2SAB, 1SBA, 2SBA	Select Control Input	Determines data source: L = real-time bus pass-through, H = stored register output - eliminates multiplexer transition glitches
A1–A8, A9–A16, B1–B8, B9–B16	Bidirectional Data I/O	True bidirectional ports with symmetrical drive strength; each pair connects directly to corresponding bus lines
V_CC, GND (×8 total)	Distributed Power/Ground	Eight V_CC and eight GND pins minimize simultaneous switching noise and improve high-speed signal integrity

Key Features

Feature	Design Value
Independent A/B Register Banks	Enables asymmetric operation: e.g., store A data while passing B data in real time, supporting flexible bus arbitration schemes
Glitch-Free Select Control	SAB/SBA inputs eliminate transient output glitches during real-time ↔ stored mode transitions - critical for error-free bus handshaking
Flow-Through Architecture	Direct A↔B path bypasses registers when SAB/SBA = L, reducing latency to <10 ns and simplifying timing closure
Distributed V_CC/GND Pins	Eight power/ground pairs reduce ground bounce and supply droop in high-frequency switching environments
EPIC™ CMOS Process	Delivers 500-mA latch-up immunity and stable AC performance across full industrial temperature range

Applications

Industrial Backplane Interface	Real-Time Data Acquisition System
Use Scenario: Interfacing multiple sensor modules to a central controller over a shared 16-bit parallel bus with strict timing constraints. IC Role / Device Role / Timing Role: Bidirectional bus transceiver and register that isolates modules during reconfiguration and stores sampled data for synchronized upload. Use Value: Eliminates external glue logic by integrating clocked storage and real-time pass-through in one device, reducing BOM count and board area.	Use Scenario: Capturing high-speed analog-to-digital converter (ADC) output streams and buffering them before DMA transfer to processor memory. IC Role / Device Role / Timing Role: Acts as a 16-bit registered input latch synchronized to ADC sample clock, then forwards data to processor bus under DMA control. Use Value: Provides deterministic setup/hold timing (t_su = 4.5 ns, t_h = 0 ns at 5 V) and eliminates metastability risk in high-throughput sampling.
Modular PLC I/O Expansion	Legacy Bus Bridge (e.g., ISA to Local Bus)
Use Scenario: Adding hot-swappable I/O modules to a programmable logic controller chassis with isolated power domains and shared data/address bus. IC Role / Device Role / Timing Role: Isolates module data paths using OEAB/OEBA and stores configuration/status registers via CLKAB/CLKBA for fault-tolerant communication. Use Value: Enables module-level power sequencing and state retention during insertion/removal without disrupting main bus operation.	Use Scenario: Connecting legacy 16-bit ISA peripherals to modern microcontroller-based local bus architectures with different timing and voltage profiles. IC Role / Device Role / Timing Role: Serves as voltage-translation-capable bus buffer and synchronizer, matching ISA strobe timing to local bus clock domain. Use Value: Supports 5-V tolerant inputs and 5-V outputs while providing register staging to absorb timing skew between asynchronous bus domains.

Industrial Backplane Interface

Real-Time Data Acquisition System

Use Scenario: Interfacing multiple sensor modules to a central controller over a shared 16-bit parallel bus with strict timing constraints.

IC Role / Device Role / Timing Role: Bidirectional bus transceiver and register that isolates modules during reconfiguration and stores sampled data for synchronized upload.

Use Value: Eliminates external glue logic by integrating clocked storage and real-time pass-through in one device, reducing BOM count and board area.

Use Scenario: Capturing high-speed analog-to-digital converter (ADC) output streams and buffering them before DMA transfer to processor memory.

IC Role / Device Role / Timing Role: Acts as a 16-bit registered input latch synchronized to ADC sample clock, then forwards data to processor bus under DMA control.

Use Value: Provides deterministic setup/hold timing (t_su = 4.5 ns, t_h = 0 ns at 5 V) and eliminates metastability risk in high-throughput sampling.

Modular PLC I/O Expansion

Legacy Bus Bridge (e.g., ISA to Local Bus)

Use Scenario: Adding hot-swappable I/O modules to a programmable logic controller chassis with isolated power domains and shared data/address bus.

IC Role / Device Role / Timing Role: Isolates module data paths using OEAB/OEBA and stores configuration/status registers via CLKAB/CLKBA for fault-tolerant communication.

Use Value: Enables module-level power sequencing and state retention during insertion/removal without disrupting main bus operation.

Use Scenario: Connecting legacy 16-bit ISA peripherals to modern microcontroller-based local bus architectures with different timing and voltage profiles.

IC Role / Device Role / Timing Role: Serves as voltage-translation-capable bus buffer and synchronizer, matching ISA strobe timing to local bus clock domain.

Use Value: Supports 5-V tolerant inputs and 5-V outputs while providing register staging to absorb timing skew between asynchronous bus domains.

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
74ACT16652DL	TTL-compatible input thresholds (VIH = 2 V min), higher drive (±24 mA), identical pinout and function	Better suited for mixed 3.3-V/5-V systems where upstream logic uses TTL levels	Select when interfacing with older 5-V TTL or LVTTL sources requiring guaranteed VIH recognition
SN74LVC16652DGGR	3.3-V only operation (1.65–3.6 V), lower power (ICC = 10 µA typ), same 56-pin TSSOP package	Targeted for low-power portable or battery-operated systems with no 5-V rail	Choose for energy-constrained designs where 5-V tolerance is unnecessary and supply headroom is limited

Compared with 74AC16652DL, the 74ACT16652DL offers enhanced input level compatibility with legacy TTL families, while SN74LVC16652DGGR reduces static power by >90% but sacrifices 5-V operation - making each alternative optimal only within distinct voltage and interoperability constraints.

Availability

74AC16652DL is available at Aetrix Electronics and suitable for industrial backplane interfaces, real-time data acquisition systems, modular PLC I/O expansion, and legacy bus bridge applications requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for 74AC16652DL 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 experience in high-reliability industrial and automotive IC design.

The 74AC16652DL belongs to TI's Widebus™ family of advanced bus interface devices, engineered specifically for high-speed, low-noise, multi-drop parallel bus systems in industrial automation and test equipment.

FAQ

What is the maximum operating frequency of the 74AC16652DL?

The 74AC16652DL supports a maximum clock frequency of 95 MHz when operated at V_CC = 5 V and T_A = 25°C. At V_CC = 3.3 V, the maximum clock frequency is 55 MHz. These values are specified under recommended operating conditions and assume proper load capacitance (≤50 pF) and signal integrity practices. The 74AC16652DL datasheet confirms these limits in the timing requirements section.

Does the 74AC16652DL support 3.3-V logic levels?

Yes, the 74AC16652DL is fully compatible with 3.3-V operation: it accepts input voltages down to 0.9 V (V_IL) and up to 3.85 V (V_IH) at V_CC = 3.3 V, and delivers VOH ≥ 2.48 V and VOL ≤ 0.44 V under 12-mA load. Its AC characteristics-including propagation delay and setup time-are characterized at both 3.3 V and 5 V, making the 74AC16652DL suitable for mixed-voltage system interfacing.

How does the 74AC16652DL handle simultaneous real-time and stored data transfer?

The 74AC16652DL does not perform simultaneous real-time and stored transfer on the same bus path. Its select-control inputs (SAB/SBA) determine the source for each direction: SAB = L selects real-time A data to B bus; SAB = H selects stored A data. The architecture ensures deterministic behavior-glitch-free transitions between modes-and allows independent control per bus pair. This behavior is explicitly defined in the FUNCTION TABLE and Figure 1 of the 74AC16652DL datasheet.

Can the 74AC16652DL be used as two independent 8-bit transceivers?

Yes, the 74AC16652DL is explicitly designed to operate as two independent 8-bit transceivers. Pins A1–A8/B1–B8 form one 8-bit channel with dedicated 1CLKAB, 1SAB, 1OEAB, etc.; pins A9–A16/B9–B16 form the second channel with 2CLKAB, 2SAB, 2OEAB, etc. Each channel has fully decoupled control logic, enabling asymmetric configurations-for example, storing data on Channel 1 while passing real-time data on Channel 2. This capability is stated in the device description and logic diagram of the 74AC16652DL datasheet.

What is the purpose of the distributed V_CC and GND pins on the 74AC16652DL?

The 74AC16652DL features eight V_CC and eight GND pins distributed across the 56-pin DL package to minimize high-speed switching noise. This configuration reduces ground bounce and supply droop during simultaneous output transitions, improves power delivery stability, and enhances signal integrity in dense PCB layouts. The benefit is confirmed in the device description and absolute maximum ratings section of the 74AC16652DL datasheet, which cites "distributed V_CC and GND pin configurations minimize high-speed switching noise" as a core architectural feature.

74AC16652DL Specifications

Product attributes: Attribute value

Manufacturer:: Texas Instruments

Series:: 74AC

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

Packaging:: Bulk

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:: 3V ~ 5.5V

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

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 56-SSOP

74AC16652DL FAQ

1.How can I place an order for 74AC16652DL through Aetrix?

Please submit a Request for Quotation (RFQ) for 74AC16652DL 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 74AC16652DL reliable?

The price and inventory of 74AC16652DL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74AC16652DL is usually 5 days.

3.What payment methods are accepted for 74AC16652DL?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74AC16652DL transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 74AC16652DL?

74AC16652DL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 74AC16652DL 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 74AC16652DL?

For technical support, including 74AC16652DL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74AC16652DL requirements.

6.How does Aetrix verify that 74AC16652DL is sourced from the original manufacturer or authorized distributors?

All 74AC16652DL 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 74AC16652DL meets industry standards.

7.What is the process for return or replacement of 74AC16652DL?

All 74AC16652DL units undergo pre-shipment inspection (PSI). If there is an issue with 74AC16652DL, 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 74AC16652DL part is unused and in its original packaging.

Return procedure for 74AC16652DL:

1.Submit a request within 90 days.

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

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