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

Texas Instruments CD74ACT652EN

Name: CD74ACT652EN
Brand: Texas Instruments
SKU: CD74ACT652EN
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: CD74ACT652EN

Manufacturer:: Texas Instruments

Category:: Buffers, Drivers, Receivers, Transceivers

Package:: 24-DIP (0.300", 7.62mm)

Datasheet:: CD74ACT652EN.pdf

Description:: IC TXRX NON-INVERT 5.5V 24DIP

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Product details

Overview

CD74ACT652EN from Texas Instruments is an octal bus transceiver with 3-state outputs and non-inverting data flow, designed for bidirectional data transfer in TTL-compatible systems. It operates at 4.5–5.5 V supply, supports ±24 mA output drive, features 8.5 ns typical propagation delay at 5 V, and is rated for -55°C to +125°C operation - used in industrial backplane interface and legacy control system data buses.

For engineers reviewing the CD74ACT652EN datasheet, CD74ACT652EN pinout, CD74ACT652EN application, or CD74ACT652EN equivalent, key selection criteria include its 24-pin SOIC package, TTL-compatible input thresholds, symmetric high/low output drive strength, and guaranteed AC timing across full military temperature range.

Technical Context

The CD74ACT652EN implements dual 8-bit bidirectional bus transceivers with independent transmit/receive direction control (DIR) and output-enable (OE) inputs per byte. Its ACT logic family delivers CMOS power efficiency with TTL-level input compatibility and rail-to-rail output swing.

Each transceiver section supports true 3-state outputs with simultaneous high-impedance assertion on both A- and B-side ports when OE is high. Propagation delays are matched between A→B and B→A directions (t_PLH/t_PHL ≤ 11 ns max at V_CC = 5 V), enabling deterministic timing in synchronous bus arbitration.

Key Specifications

Parameter	Value and Actual Design Meaning
Logic Family	ACT (Advanced CMOS TTL-compatible) - ensures interoperability with 74LS/74F systems without level-shifting.
Supply Voltage	4.5 V to 5.5 V - supports stable operation under noisy industrial power rails with ±10% tolerance.
Propagation Delay	8.5 ns typical (5 V, 50 pF load) - enables reliable 80 MHz bus clocking in point-to-point configurations.
Output Drive	±24 mA (I_OH/I_OL) - drives standard TTL loads and long PCB traces without external buffers.
Operating Temp	-55°C to +125°C - qualified for extended-range military, aerospace, and downhole industrial applications.
Input Thresholds	V_IL = 0.8 V max, V_IH = 2.0 V min - matches TTL logic levels, eliminating need for input conditioning circuitry.

Pinout & Package

CD74ACT652EN is housed in a 24-pin plastic small-outline integrated circuit (SOIC) package (DW suffix), 7.5 mm body width, 2.65 mm height, 1.27 mm pitch. Pin 1 marked by notch or beveled corner; pin 1 quadrant Q1 per TI tape-and-reel specification.

Pin/Terminal	Circuit Role	Design Meaning
1, 2, 3, 4, 5, 6, 7, 8	A-side data I/O	Bidirectional data port A (A1–A8); high-impedance when OE active high or DIR mismatch.
9, 10, 11, 13, 14, 15, 16, 17	B-side data I/O	Bidirectional data port B (B1–B8); mirrors A-side state when DIR and OE conditions satisfied.
12	DIR (Direction Control)	Low = A→B transfer; High = B→A transfer - determines real-time data flow direction per byte group.
18	OE (Output Enable)	High = all outputs forced high-Z; Low = enables bidirectional transfer per DIR setting.
24	V_CC	Positive supply (4.5–5.5 V); decoupling capacitor required within 10 mm of pin.
12, 24	GND	Ground reference (pins 12 and 24 are dedicated GND terminals - not interchangeable with signal pins).

Key Features

Feature	Design Value
Octal bidirectional data path	Two independent 8-bit transceivers share single DIR/OE controls - simplifies bus arbitration logic in multi-master systems.
TTL-compatible inputs	Accepts standard TTL voltage thresholds without pull-ups or level translators - reduces BOM count in mixed-logic designs.
Matched A↔B propagation delay	t_PLH and t_PHL differ by ≤0.5 ns - eliminates skew-induced setup/hold violations in synchronous backplane transfers.
High noise immunity	Typical V_NH/V_NL = 0.7 V at V_CC = 5 V - suppresses false triggering from EMI-coupled transients on industrial control lines.

Applications

Industrial Backplane Interface	Military Data Bus Arbitration
Use Scenario: Bidirectional data exchange between CPU module and I/O expansion cards in ruggedized rack-mounted controllers. IC Role / Device Role / Timing Role: Bus transceiver managing shared address/data lines with direction control synchronized to bus grant signals. Use Value: ±24 mA drive sustains signal integrity over 15 cm PCB traces; -55°C to +125°C rating ensures uptime in unheated enclosures.	Use Scenario: Real-time command/data routing between mission computers and sensor pods in airborne avionics systems. IC Role / Device Role / Timing Role: Directionally configurable data bridge enabling time-triggered message passing with deterministic latency. Use Value: Matched A↔B propagation delay (≤0.5 ns skew) guarantees sub-cycle timing alignment across dual 8-bit paths.
Legacy System Bus Extension	Test Equipment Signal Routing
Use Scenario: Interfacing modern FPGA-based test modules to vintage VMEbus or STD bus peripherals. IC Role / Device Role / Timing Role: Level-translating transceiver adapting 3.3 V FPGA I/O to 5 V TTL bus standards. Use Value: TTL-compatible inputs accept 5 V logic directly; 8.5 ns typical delay preserves timing margins in 20 MHz VME cycles.	Use Scenario: Reconfigurable signal path switching in automated test equipment (ATE) channel cards. IC Role / Device Role / Timing Role: Programmable bidirectional buffer enabling dynamic DUT pin assignment via microcontroller DIR/OE control. Use Value: Independent OE per transceiver pair allows selective isolation of test channels without global reset.

Industrial Backplane Interface

Military Data Bus Arbitration

Use Scenario: Bidirectional data exchange between CPU module and I/O expansion cards in ruggedized rack-mounted controllers.

IC Role / Device Role / Timing Role: Bus transceiver managing shared address/data lines with direction control synchronized to bus grant signals.

Use Value: ±24 mA drive sustains signal integrity over 15 cm PCB traces; -55°C to +125°C rating ensures uptime in unheated enclosures.

Use Scenario: Real-time command/data routing between mission computers and sensor pods in airborne avionics systems.

IC Role / Device Role / Timing Role: Directionally configurable data bridge enabling time-triggered message passing with deterministic latency.

Use Value: Matched A↔B propagation delay (≤0.5 ns skew) guarantees sub-cycle timing alignment across dual 8-bit paths.

Legacy System Bus Extension

Test Equipment Signal Routing

Use Scenario: Interfacing modern FPGA-based test modules to vintage VMEbus or STD bus peripherals.

IC Role / Device Role / Timing Role: Level-translating transceiver adapting 3.3 V FPGA I/O to 5 V TTL bus standards.

Use Value: TTL-compatible inputs accept 5 V logic directly; 8.5 ns typical delay preserves timing margins in 20 MHz VME cycles.

Use Scenario: Reconfigurable signal path switching in automated test equipment (ATE) channel cards.

IC Role / Device Role / Timing Role: Programmable bidirectional buffer enabling dynamic DUT pin assignment via microcontroller DIR/OE control.

Use Value: Independent OE per transceiver pair allows selective isolation of test channels without global reset.

Equivalent & Alternatives

The following parts are listed as comparable options for similar octal bidirectional bus transceiver applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
SN74ACT652N	Same ACT logic family, identical pinout and AC/DC specs; manufactured by TI with updated process and traceability.	No functional difference; SN74ACT652N replaces CD74ACT652EN in new designs per TI's product consolidation.	Select SN74ACT652N for new designs requiring current TI manufacturing support and RoHS-compliant documentation.
74AC652PC	AC-family variant: higher speed (7 ns typ), lower drive (±24 mA same), but V_IH = 3.5 V min - not TTL-compatible.	Requires input level-shifting in TTL systems; unsuitable where legacy 74LS/74F devices coexist on same bus.	Choose 74AC652PC only in pure CMOS systems with ≥3.5 V logic-high inputs and tighter timing budgets.

Compared with CD74ACT652EN, SN74ACT652N offers identical functionality with enhanced supply-chain continuity, while 74AC652PC trades TTL compatibility for marginal speed gain - making CD74ACT652EN the optimal choice for mixed-logic, military-temp, and legacy bus integration.

Availability

CD74ACT652EN is available at Aetrix Electronics and suitable for industrial backplane interface, military data bus arbitration, and legacy system bus extension requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for CD74ACT652EN 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 specializing in analog, embedded processing, and logic solutions with broad industrial and aerospace qualification.

The CD74ACT652EN belongs to TI's legacy high-reliability logic portfolio, engineered specifically for robust bidirectional data transfer in harsh-environment computing and control systems.

FAQ

What logic family does the CD74ACT652EN belong to, and why does it matter for system design?

The CD74ACT652EN belongs to the Advanced CMOS TTL-compatible (ACT) logic family. This means it accepts standard TTL input voltage thresholds (V_IL ≤ 0.8 V, V_IH ≥ 2.0 V) while delivering CMOS power efficiency and rail-to-rail output swing. For system designers, this eliminates level-shifting circuitry when interfacing with legacy 74LS or 74F devices - a critical advantage in retrofitting or maintaining industrial control systems where CD74ACT652EN serves as the bus interface backbone.

Does the CD74ACT652EN support true bidirectional operation without external control logic?

Yes, the CD74ACT652EN supports true bidirectional data flow using only two control inputs: DIR (direction) and OE (output enable). When OE is low, asserting DIR low enables A→B transfer; asserting DIR high enables B→A transfer - all with matched propagation delay and simultaneous 3-state control. This capability makes CD74ACT652EN ideal for compact, low-gate-count bus arbitration in space-constrained applications like modular I/O carriers where CD74ACT652EN replaces discrete logic and buffers.

What is the maximum operating temperature range certified for the CD74ACT652EN?

The CD74ACT652EN is fully specified and tested over -55°C to +125°C, meeting MIL-PRF-38535 Class B requirements for extended temperature operation. This rating is verified per TI's packaging and qualification data, and applies to the CD74ACT652EN in its SOIC (DW) package. Engineers deploying CD74ACT652EN in downhole tools, avionics bays, or uncooled industrial cabinets rely on this certified range for guaranteed functionality without derating.

Can the CD74ACT652EN drive standard TTL loads directly, and what is its output current capability?

Yes, the CD74ACT652EN can drive standard TTL loads directly due to its ±24 mA output drive capability (I_OH = -24 mA, I_OL = 24 mA at V_CC = 5 V). This exceeds the 1.6 mA sink/400 µA source requirement of standard TTL, allowing CD74ACT652EN to fan out to up to 15 LS-TTL loads without buffering. That drive strength is essential in backplane applications where CD74ACT652EN maintains signal integrity across long, unterminated traces.

Is there a drop-in replacement for the CD74ACT652EN with current manufacturing support?

TI's SN74ACT652N is a functionally identical, pin-compatible replacement for CD74ACT652EN, manufactured under TI's current process with full RoHS compliance and documented lifecycle support. While CD74ACT652EN remains available through legacy channels, SN74ACT652N is TI's recommended successor. For new designs requiring assured long-term supply and audit-ready documentation, SN74ACT652N supersedes CD74ACT652EN - though both share identical electrical behavior and mechanical footprint.

CD74ACT652EN Specifications

Product attributes: Attribute value

Manufacturer:: Texas Instruments

Series:: 74ACT

Package/Case:: 24-DIP (0.300", 7.62mm)

Packaging:: Tube

Product Status:: Obsolete

Logic Type:: Transceiver, Non-Inverting

Number of Elements:: 1

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:: -55°C ~ 125°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: 24-PDIP

CD74ACT652EN FAQ

1.How can I place an order for CD74ACT652EN through Aetrix?

Please submit a Request for Quotation (RFQ) for CD74ACT652EN 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 CD74ACT652EN reliable?

The price and inventory of CD74ACT652EN are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CD74ACT652EN is usually 5 days.

3.What payment methods are accepted for CD74ACT652EN?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CD74ACT652EN transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for CD74ACT652EN?

CD74ACT652EN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your CD74ACT652EN 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 CD74ACT652EN?

For technical support, including CD74ACT652EN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CD74ACT652EN requirements.

6.How does Aetrix verify that CD74ACT652EN is sourced from the original manufacturer or authorized distributors?

All CD74ACT652EN 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 CD74ACT652EN meets industry standards.

7.What is the process for return or replacement of CD74ACT652EN?

All CD74ACT652EN units undergo pre-shipment inspection (PSI). If there is an issue with CD74ACT652EN, 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 CD74ACT652EN part is unused and in its original packaging.

Return procedure for CD74ACT652EN:

1.Submit a request within 90 days.

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

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