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Texas Instruments 74ACT16652DLR

Name: 74ACT16652DLR
Brand: Texas Instruments
SKU: 74ACT16652DLR
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 74ACT16652DLR

Manufacturer:: Texas Instruments

Category:: Buffers, Drivers, Receivers, Transceivers

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

Datasheet:: 74ACT16652DLR.pdf

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

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Product details

Overview

74ACT16652DLR from Texas Instruments is a 16-bit dual-bus transceiver with D-type registers and independent 3-state control, operating at 5 V with ±24 mA drive strength, 90 MHz max clock frequency, and –40°C to 85°C temperature range. It enables real-time or stored data transfer between A and B buses in industrial backplanes and high-speed memory interfaces.

For engineers reviewing the 74ACT16652DLR datasheet, 74ACT16652DLR pinout, 74ACT16652DLR application, or 74ACT16652DLR equivalent, key selection criteria include dual-register multiplexing capability, simultaneous A/B bus storage, glitch-free select control, distributed V_CC/GND for noise suppression, and SSOP-56 package compatibility with high-density PCB layouts.

Technical Context

The 74ACT16652DLR implements two independent 8-bit register-transceiver channels (A↔B), each with dedicated clock (CLKAB/CLKBA), output-enable (OEAB/OEBA), and select-control (SAB/SBA) inputs. Its flow-through architecture supports four bus-management modes: real-time A→B, real-time B→A, stored A→B, and stored B→A - all without decoding glitches during mode transitions.

Each channel uses EPIC™ 1-µm CMOS process with TTL-compatible inputs, 500-mA latch-up immunity at 125°C, and distributed power/ground pins to minimize switching noise. The device operates only at 4.5–5.5 V supply and does not support mixed-voltage I/O or level translation.

Key Specifications

Parameter	Value and Actual Design Meaning
Supply Voltage	4.5 V to 5.5 V - requires stable 5-V rail; no internal regulation or wide-range operation.
Max Clock Frequency	90 MHz - supports high-speed synchronous bus transfers with 5.5 ns minimum pulse width.
Output Drive	±24 mA - sufficient to drive 50-pF loads at full speed without external buffers in standard logic interfaces.
Propagation Delay	3.0–16.9 ns - varies by signal path (e.g., CLK→output: 4.5–12.3 ns; OE→output: 3.0–13.4 ns).
Operating Temperature	–40°C to +85°C - qualified for commercial/industrial environments; not rated for extended automotive or military use.
Input Compatibility	TTL-voltage - accepts 0.8 V / 2.0 V logic thresholds; no CMOS-level (V_CC/2) or 3.3-V input support.
Power Dissipation	1.4 W max at 55°C (DL package) - thermal design must account for full-load switching in compact layouts.

Pinout & Package

74ACT16652DLR is housed in a 56-pin Shrink Small-Outline Package (SSOP-DL), 300-mil body width, 25-mil pin pitch, RoHS-compliant NIPDAU finish, MSL Level-1, tape-and-reel packaging (1000 pcs/reel).

Pin/Terminal	Circuit Role	Design Meaning
1OEAB, 2OEAB, 1OEBA, 2OEBA	Output-enable controls	Active-low enables for A→B and B→A transceiver paths; independent per 8-bit segment.
1CLKAB, 2CLKAB, 1CLKBA, 2CLKBA	Register clock inputs	Rising-edge-triggered clocks store data into respective A or B registers regardless of OE/S state.
1SAB, 2SAB, 1SBA, 2SBA	Select-control inputs	High = route stored data; low = route real-time bus data; eliminates multiplexer transition glitches.
A1–A8, A9–A16, B1–B8, B9–B16	Bidirectional data terminals	True 16-bit dual-bus I/O ports; each group supports 3-state output and registered input capture.
V_CC (pins 7, 20, 32, 45)	Power supply	Distributed V_CC pins reduce simultaneous switching noise and improve high-frequency stability.
GND (pins 4, 11, 23, 30, 37, 46, 53)	Ground reference	Seven GND pins provide low-inductance return paths for all I/O groups and internal logic.

Key Features

Feature	Design Value
Multiplexed real-time/stored data flow	Enables seamless switching between live bus traffic and latched register contents without metastability or glitches.
Independent A/B register and enable control	Allows asymmetric operation - e.g., store A while passing B in real time, or hold one bus while updating the other.
Distributed V_CC and GND pin configuration	Reduces ground bounce and supply droop in high-speed 16-bit parallel interfaces, critical for signal integrity.
EPIC™ 1-µm CMOS process	Delivers 90 MHz performance with 500-mA latch-up immunity, enabling robust operation in noisy industrial settings.
TTL-voltage compatible inputs	Interoperates directly with legacy 5-V TTL logic families without level-shifting circuitry or pull-up resistors.

Applications

Backplane Data Routing	Memory Interface Buffering
Use Scenario: Bidirectional data routing between CPU and peripheral modules across a 16-bit parallel backplane with hot-swap capability. IC Role / Device Role / Timing Role: Dual-register transceiver managing real-time command forwarding and buffered status response using separate A/B clock domains. Use Value: Eliminates external latch + buffer combinations; reduces component count and layout area while maintaining deterministic timing via synchronized clock edges.	Use Scenario: Interfacing a microcontroller's external memory bus to SRAM or Flash devices requiring registered address/data staging. IC Role / Device Role / Timing Role: Acts as a 16-bit registered bus interface, capturing and holding memory addresses during read/write cycles to decouple timing between controller and memory. Use Value: Enables reliable memory access at 90 MHz clock rates without violating setup/hold margins on slower memory parts.
Industrial PLC I/O Expansion	Digital Signal Processor (DSP) Data Bridge
Use Scenario: Extending I/O capacity in programmable logic controllers where fieldbus data must be synchronized with local scan cycles. IC Role / Device Role / Timing Role: Stores sensor/actuator data from one bus cycle and forwards it to the CPU bus in the next, acting as a deterministic pipeline stage. Use Value: Provides deterministic latency and isolation between asynchronous fieldbus timing and synchronous CPU execution, improving system predictability.	Use Scenario: Bridging data paths between a DSP's EMIF and external FIFOs or co-processors in real-time signal processing systems. IC Role / Device Role / Timing Role: Transfers processed sample blocks from DSP memory to external memory while simultaneously loading new input data - using dual-register ping-pong operation. Use Value: Achieves continuous data flow without CPU intervention; leverages independent OE/S/CLK controls to overlap read/write operations across A and B buses.

Backplane Data Routing

Memory Interface Buffering

Use Scenario: Bidirectional data routing between CPU and peripheral modules across a 16-bit parallel backplane with hot-swap capability.

IC Role / Device Role / Timing Role: Dual-register transceiver managing real-time command forwarding and buffered status response using separate A/B clock domains.

Use Value: Eliminates external latch + buffer combinations; reduces component count and layout area while maintaining deterministic timing via synchronized clock edges.

Use Scenario: Interfacing a microcontroller's external memory bus to SRAM or Flash devices requiring registered address/data staging.

IC Role / Device Role / Timing Role: Acts as a 16-bit registered bus interface, capturing and holding memory addresses during read/write cycles to decouple timing between controller and memory.

Use Value: Enables reliable memory access at 90 MHz clock rates without violating setup/hold margins on slower memory parts.

Industrial PLC I/O Expansion

Digital Signal Processor (DSP) Data Bridge

Use Scenario: Extending I/O capacity in programmable logic controllers where fieldbus data must be synchronized with local scan cycles.

IC Role / Device Role / Timing Role: Stores sensor/actuator data from one bus cycle and forwards it to the CPU bus in the next, acting as a deterministic pipeline stage.

Use Value: Provides deterministic latency and isolation between asynchronous fieldbus timing and synchronous CPU execution, improving system predictability.

Use Scenario: Bridging data paths between a DSP's EMIF and external FIFOs or co-processors in real-time signal processing systems.

IC Role / Device Role / Timing Role: Transfers processed sample blocks from DSP memory to external memory while simultaneously loading new input data - using dual-register ping-pong operation.

Use Value: Achieves continuous data flow without CPU intervention; leverages independent OE/S/CLK controls to overlap read/write operations across A and B buses.

Equivalent & Alternatives

The following parts are listed as comparable options for similar 16-bit registered transceiver applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
SN74ACT16543DLR	Separate A/B direction control (DIR) instead of OEAB/OEBA; no SAB/SBA select logic; simpler real-time-only operation.	Lacks stored-data multiplexing; suitable only for unidirectional or basic bidirectional buffering without register staging.	Choose when register storage and glitch-free mode switching are unnecessary - reduces control logic complexity.
74ACT16245DLR	No internal registers; pure 3-state transceiver with DIR control; higher drive (±32 mA); identical SSOP-56 package.	Cannot store data - limited to real-time bus isolation or level-consistent driving without timing decoupling.	Prefer for high-current, low-latency bus extension where registration adds unacceptable delay or overhead.

Compared with SN74ACT16543DLR and 74ACT16245DLR, the 74ACT16652DLR uniquely delivers multiplexed real-time/stored data routing with independent clocking per 8-bit segment - essential for deterministic bus arbitration, pipeline staging, and glitch-free mode transitions in synchronous systems.

Availability

74ACT16652DLR is available at Aetrix Electronics and suitable for industrial backplane routing, memory interface buffering, PLC I/O expansion, and DSP data bridging requiring stable component supply and long-term production continuity.

Supply support for 74ACT16652DLR 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 over 50 years of innovation in high-reliability digital interfaces.

The 74ACT16652DLR belongs to TI's Widebus™ family of high-speed 16-bit logic devices, designed specifically for noise-resilient, high-density parallel bus architectures in industrial and communications infrastructure.

FAQ

What is the maximum operating frequency of the 74ACT16652DLR?

The 74ACT16652DLR supports a maximum clock frequency of 90 MHz under recommended conditions (V_CC = 5 V ± 0.5 V, T_A = 25°C). This applies to both CLKAB and CLKBA inputs. At temperature extremes (–40°C or +85°C), timing margins tighten, and system-level validation is required to confirm sustained 90 MHz operation in the target PCB environment. The 74ACT16652DLR datasheet specifies minimum pulse widths (5.5 ns) and setup/hold times (4.5 ns / 1 ns) that constrain practical timing budgets.

Does the 74ACT16652DLR support 3.3-V logic interfacing?

No, the 74ACT16652DLR does not support 3.3-V logic interfacing. It features TTL-voltage compatible inputs (V_IL = 0.8 V, V_IH = 2.0 V) and operates exclusively from a 4.5–5.5 V supply. Its outputs swing rail-to-rail within the V_CC range and are not 3.3-V tolerant. Direct connection to 3.3-V systems risks overvoltage damage or unreliable logic levels; level-shifting circuitry is mandatory for mixed-voltage designs involving the 74ACT16652DLR.

How many ground pins does the 74ACT16652DLR have, and why are they distributed?

The 74ACT16652DLR has seven dedicated GND pins (pins 4, 11, 23, 30, 37, 46, and 53) distributed across the SSOP-56 package. This layout minimizes simultaneous switching noise by providing low-inductance return paths for localized I/O groups and internal logic blocks. Distributed grounding is essential for maintaining signal integrity at 90 MHz operation and meets the design intent of TI's Widebus™ family to suppress ground bounce in high-speed parallel interfaces - a key requirement confirmed in the 74ACT16652DLR functional description and pinout diagram.

Can the 74ACT16652DLR operate as two independent 8-bit transceivers?

Yes, the 74ACT16652DLR can operate as two independent 8-bit transceivers. Its architecture divides the 16-bit A and B buses into two 8-bit segments (1A1–1A8/1B1–1B8 and 2A1–2A8/2B1–2B8), each with dedicated clock (1CLKAB/1CLKBA, 2CLKAB/2CLKBA), output-enable (1OEAB/1OEBA, 2OEAB/2OEBA), and select-control (1SAB/1SBA, 2SAB/2SBA) signals. This allows fully autonomous operation - for example, storing data on one 8-bit segment while passing real-time data on the other - as explicitly defined in the 74ACT16652DLR function table and logic diagram.

What is the purpose of the SAB and SBA inputs on the 74ACT16652DLR?

The SAB and SBA inputs on the 74ACT16652DLR select between real-time and stored data transfer modes: low selects real-time bus data, high selects data previously latched into the internal D-type flip-flops. Their circuitry eliminates decoding glitches during transitions - a documented feature in the 74ACT16652DLR datasheet's description and Figure 1. This ensures clean, deterministic bus switching without transient invalid states, which is critical in synchronous systems where the 74ACT16652DLR manages time-sensitive data routing between A and B buses.

74ACT16652DLR Specifications

Product attributes: Attribute value

Manufacturer:: Texas Instruments

Series:: 74ACT

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:: 24mA, 24mA

Voltage - Supply:: 4.5V ~ 5.5V

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

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 56-SSOP

74ACT16652DLR FAQ

1.How can I place an order for 74ACT16652DLR through Aetrix?

Please submit a Request for Quotation (RFQ) for 74ACT16652DLR 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 74ACT16652DLR reliable?

The price and inventory of 74ACT16652DLR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74ACT16652DLR is usually 5 days.

3.What payment methods are accepted for 74ACT16652DLR?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74ACT16652DLR transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 74ACT16652DLR?

74ACT16652DLR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 74ACT16652DLR 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 74ACT16652DLR?

For technical support, including 74ACT16652DLR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74ACT16652DLR requirements.

6.How does Aetrix verify that 74ACT16652DLR is sourced from the original manufacturer or authorized distributors?

All 74ACT16652DLR 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 74ACT16652DLR meets industry standards.

7.What is the process for return or replacement of 74ACT16652DLR?

All 74ACT16652DLR units undergo pre-shipment inspection (PSI). If there is an issue with 74ACT16652DLR, 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 74ACT16652DLR part is unused and in its original packaging.

Return procedure for 74ACT16652DLR:

1.Submit a request within 90 days.

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

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