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Texas Instruments 74ACT11652DWR
- Part No.:
- 74ACT11652DWR
- Manufacturer:
- Texas Instruments
- Package:
- 28-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
74ACT11652DWR.pdf
- Description:
- IC TXRX NON-INVERT 5.5V 28SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,853
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Product details
Overview
74ACT11652DWR from Texas Instruments is an octal bus transceiver with integrated D-type flip-flop registers and independent 3-state control, operating at 4.5–5.5 V, supporting 105 MHz clock frequency and 9.9 ns max propagation delay (A→B), used in high-speed bidirectional data path management between microprocessor buses and peripheral subsystems.
For engineers reviewing the 74ACT11652DWR datasheet, 74ACT11652DWR pinout, 74ACT11652DWR application, or 74ACT11652DWR equivalent, key selection criteria include real-time/stored data multiplexing capability, simultaneous A/B register storage, glitch-free select control, and center-pin VCC/GND layout optimization for noise reduction in dense PCB designs.
Technical Context
This device implements dual independent bus paths (A and B) with separate clock (CAB/CBA), select (SAB/SBA), and enable (GAB/GBA) controls per direction, enabling four distinct operational modes: real-time bidirectional transfer, stored-data bidirectional transfer, isolated storage, and combined store-and-forward operation. Each of the eight channels includes a D flip-flop and 3-state output driver.
The EPIC 1-µm CMOS process delivers 500-mA latch-up immunity at 125°C, while center-aligned VCC (pins 20,21) and GND (pins 6,7,8,9) pins minimize simultaneous switching noise. Select logic eliminates decoding glitches during real-time ↔ stored mode transitions, with low = real-time and high = stored data selection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.5 V to 5.5 V - ensures compatibility with standard 5-V TTL/CMOS systems and noise margin compliance. |
| Max Clock Frequency | 105 MHz - supports high-throughput synchronous bus handshaking in real-time data capture applications. |
| Propagation Delay (A→B) | 3.8–11.1 ns - enables sub-10-ns timing-critical interconnects between CPU and memory/peripheral buses. |
| Output Drive (IOL/IOH) | ±24 mA - provides sufficient current to drive 50-pF loads across 15-cm traces without signal degradation. |
| Operating Temperature | –40°C to +85°C - qualified for industrial-grade embedded control and communications equipment. |
| Input Transition Rate | 0–10 ns/V - defines maximum allowable input slew rate to prevent false triggering on clock or control inputs. |
| Power Dissipation Cap. | 59 pF (enabled), 14 pF (disabled) - quantifies dynamic power consumption per transceiver channel at 1 MHz/50 pF load. |
Pinout & Package
DW package: 28-pin SOIC (Small Outline Integrated Circuit), 300-mil body width, surface-mount, RoHS-compliant lead finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GAB | Output Enable (Bus A) | Active-low control enabling 3-state outputs on A1–A8; disables all A-side drivers when high. |
| GBA | Output Enable (Bus B) | Active-low control enabling 3-state outputs on B1–B8; disables all B-side drivers when high. |
| CAB | Register Clock (A→B) | Low-to-high edge stores A-bus data into internal D flip-flops for later B-bus output. |
| CBA | Register Clock (B→A) | Low-to-high edge stores B-bus data into internal D flip-flops for later A-bus output. |
| SAB | Select (A-B Path) | High = output stored A data onto B bus; Low = output real-time A data onto B bus. |
| SBA | Select (B-A Path) | High = output stored B data onto A bus; Low = output real-time B data onto A bus. |
| A1–A8 | Data I/O (Bus A) | Bidirectional terminals: input when GAB high; output (real-time or stored) when GAB low. |
| B1–B8 | Data I/O (Bus B) | Bidirectional terminals: input when GBA high; output (real-time or stored) when GBA low. |
| VCC (Pins 20,21) | Power Supply | Center-located dual VCC pins reduce power distribution inductance and suppress ground bounce. |
| GND (Pins 6,7,8,9) | Ground Reference | Four adjacent GND pins provide low-inductance return path for high-speed switching currents. |
Key Features
| Feature | Design Value |
|---|---|
| Independent Register & Enable Control | Separate CAB/CBA clocks and GAB/GBA enables allow asymmetric bus arbitration-e.g., store A while holding B, or forward stored B while capturing new A. |
| Glitch-Free Mode Switching | Select logic prevents metastability or transient shorts during SAB/SBA transitions, eliminating need for external synchronization in real-time↔stored mode changes. |
| Flow-Through Architecture | Real-time data passes directly through transceivers without register latency, enabling zero-cycle forwarding when SAB/SBA = low. |
| Center-Pin Power/Ground Layout | VCC and GND pins positioned centrally minimize loop area and high-frequency impedance, reducing EMI in >50-MHz digital systems. |
| EPIC Process Robustness | 500-mA latch-up immunity at 125°C ensures reliability in thermally stressed industrial environments without external current limiting. |
Applications
| Microprocessor Bus Interface | Memory Subsystem Bridging |
|---|---|
Use Scenario: Interfacing a 16-bit microprocessor data bus to an 8-bit peripheral controller with asynchronous timing requirements. IC Role / Device Role / Timing Role: Bidirectional data buffer and register synchronizer managing clock domain crossing between CPU and peripheral clock domains. Use Value: Enables deterministic data capture via CAB/CBA-triggered storage while allowing real-time readback via SAB/SBA-controlled pass-through-eliminating external FIFOs. |
Use Scenario: Isolating and buffering address/data lines between DRAM controller and SRAM cache in embedded instrumentation. IC Role / Device Role / Timing Role: Octal transceiver providing controlled 3-state isolation and registered write-back capability for shared memory access arbitration. Use Value: Simultaneous storage of both A and B bus data on single clock edge allows atomic snapshot capture of memory transaction state for debug or error recovery. |
| Industrial PLC Backplane | Digital Signal Processing I/O Hub |
Use Scenario: Managing bidirectional data flow across modular I/O slots in a programmable logic controller rack. IC Role / Device Role / Timing Role: Registered bus transceiver acting as hot-swap-aware interface between backplane bus and module-specific logic. Use Value: Independent GAB/GBA enables allow per-slot isolation; center-pin VCC/GND reduces noise coupling across 20+ modules sharing same backplane. |
Use Scenario: Routing parallel ADC/DAC data between FPGA fabric and analog front-end in real-time signal acquisition systems. IC Role / Device Role / Timing Role: High-speed data path manager with selectable real-time or buffered transfer for time-critical sample alignment. Use Value: 105 MHz clock support and sub-10 ns tPLH/tPHL ensure precise sample timestamping and jitter-free data forwarding to processing cores. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal registered transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74ACT11652DW | Same die, identical pinout and electrical specs; DW suffix denotes same SOIC-28 package without 'R' tape-and-reel indicator. | No functional difference; suitable for identical use cases including bus isolation and registered data forwarding. | Select SN74ACT11652DW when tape-and-reel packaging is not required or when sourcing from legacy inventory. |
| 74ACT11837DWR | Lacks independent SAB/SBA select control; supports only real-time transfer or registered transfer-not simultaneous real-time/stored multiplexing. | Cannot perform glitch-free mode switching or concurrent A/B storage; limited to simpler unidirectional or non-multiplexed buffered interfaces. | Choose 74ACT11837DWR only if application requires basic registered transceivers without dual-mode select functionality. |
Compared with SN74ACT11652DW and 74ACT11837DWR, the 74ACT11652DWR uniquely supports independent real-time/stored data routing per bus direction with glitch-free select logic-enabling atomic bus snapshots and mixed-mode data forwarding not possible with either alternative.
Availability
74ACT11652DWR is available at Aetrix Electronics and suitable for microprocessor bus interfacing, memory subsystem bridging, industrial PLC backplane management, and digital signal processing I/O hub applications requiring stable component supply and long-term industrial lifecycle support.
Supply support for 74ACT11652DWR 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 interface ICs.
The 74ACT11652DWR belongs to TI's advanced ACT (Advanced CMOS Technology) logic family, designed specifically for high-speed, low-noise bidirectional bus management in industrial, computing, and communications infrastructure.
FAQ
What is the primary function of the 74ACT11652DWR in a digital system?
The 74ACT11652DWR serves as an octal registered bus transceiver that manages bidirectional data flow between two 8-bit buses (A and B) with independent real-time or stored-data routing. It integrates D-type flip-flops, 3-state output drivers, and glitch-free select logic-enabling functions like atomic bus state capture, clock-domain bridging, and noise-optimized PCB interconnects. Its design centers on deterministic data forwarding in industrial and computing applications where timing integrity and layout robustness are critical.
Does the 74ACT11652DWR support simultaneous storage of data from both A and B buses?
Yes, the 74ACT11652DWR supports simultaneous storage of data from both A and B buses on a single low-to-high clock transition: applying a rising edge to CAB stores A-bus data, and a rising edge to CBA stores B-bus data. The function table confirms "Store A and B data" when GAB = L, GBA = H, CAB = ↑, CBA = ↑, with SAB/SBA = X. This capability enables synchronized snapshot capture of dual-bus activity for debugging or fault logging in real-time systems.
How does the center-pin VCC and GND configuration improve performance in the 74ACT11652DWR?
The 74ACT11652DWR places VCC on pins 20 and 21 and GND on pins 6, 7, 8, and 9-centered within the 28-pin SOIC footprint. This layout minimizes power/ground loop inductance, reduces simultaneous switching output (SSO) noise, and improves high-frequency decoupling effectiveness. In practice, this configuration lowers ground bounce by up to 30% compared to corner-fed packages, making the 74ACT11652DWR especially effective in dense, high-speed digital backplanes and multi-channel data acquisition systems.
Can the 74ACT11652DWR operate reliably at 5.5 V supply voltage?
Yes, the 74ACT11652DWR is fully characterized for operation at 5.5 V supply voltage across its full temperature range (–40°C to +85°C). Electrical specifications-including VOH ≥ 4.94 V at IOH = –24 mA and VOL ≤ 0.44 V at IOL = 24 mA-are guaranteed at VCC = 5.5 V. Its EPIC process also ensures 500-mA latch-up immunity at 125°C, confirming robustness under overvoltage transients common in industrial 5-V rail environments.
What is the significance of the 'R' suffix in 74ACT11652DWR?
The 'R' in 74ACT11652DWR indicates tape-and-reel packaging-specifically, 1,000 units per reel in SOIC-28 (DW) format-optimized for automated SMT assembly. The base part 74ACT11652DW shares identical silicon, pinout, and electrical behavior; the 'R' denotes only packaging and handling format. For manual prototyping or low-volume builds, the non-R variant may be preferred, but for production, the 74ACT11652DWR ensures consistent feeder compatibility and traceable lot control.
74ACT11652DWR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74ACT
- Package/Case:
- 28-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tape & Reel (TR)
- 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:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 28-SOIC
74ACT11652DWR FAQ
1.How can I place an order for 74ACT11652DWR through Aetrix?
Please submit a Request for Quotation (RFQ) for 74ACT11652DWR 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 74ACT11652DWR reliable?
The price and inventory of 74ACT11652DWR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74ACT11652DWR is usually 5 days.
3.What payment methods are accepted for 74ACT11652DWR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74ACT11652DWR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74ACT11652DWR?
74ACT11652DWR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74ACT11652DWR 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 74ACT11652DWR?
For technical support, including 74ACT11652DWR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74ACT11652DWR requirements.
6.How does Aetrix verify that 74ACT11652DWR is sourced from the original manufacturer or authorized distributors?
All 74ACT11652DWR 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 74ACT11652DWR meets industry standards.
7.What is the process for return or replacement of 74ACT11652DWR?
All 74ACT11652DWR units undergo pre-shipment inspection (PSI). If there is an issue with 74ACT11652DWR, 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 74ACT11652DWR part is unused and in its original packaging.
Return procedure for 74ACT11652DWR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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