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Texas Instruments 74ACT11623DW
- Part No.:
- 74ACT11623DW
- Manufacturer:
- Texas Instruments
- Package:
- 24-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
74ACT11623DW.pdf
- Description:
- IC TXRX NON-INVERT 5.5V 24SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,479
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Product details
Overview
74ACT11623DW from Texas Instruments is a 16-bit dual-supply bidirectional transceiver with independent A↔B bus direction control via GBA and GAB enable inputs, designed for asynchronous two-way communication between local data buses. It features TTL-compatible inputs, ±24 mA output drive, 1.5–11.5 ns propagation delays, and operates over −40°C to 85°C at 4.5–5.5 V supply.
For engineers reviewing the 74ACT11623DW datasheet, 74ACT11623DW pinout, 74ACT11623DW application, or 74ACT11623DW equivalent, this device supports latch-up-immune (500 mA typical) bus isolation, flow-through PCB layout optimization, and simultaneous bidirectional latching for bus state retention in embedded control and industrial backplane interfaces.
Technical Context
The 74ACT11623DW implements dual-enable logic (GBA/GAB) to configure data flow direction or isolate buses. When both enables are high, it enters transparent latch mode-each output reinforces its input, retaining prior bus states without external clocking.
Its EPIC (Enhanced-Performance Implanted CMOS) 1-µm process delivers rail-to-rail output swing (VOH ≥ 3.94 V, VOL ≤ 0.44 V at VCC = 4.5 V), low-noise center-pin VCC/GND placement, and 500 mA latch-up immunity at 125°C-enabling robust operation in noisy industrial environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.5 V to 5.5 V - compatible with standard 5 V TTL/CMOS systems without level-shifting. |
| Propagation Delay | 1.5–8.5 ns (A↔B) - enables high-speed local bus handshaking up to ~100 MHz effective throughput. |
| Output Drive | ±24 mA - sufficient to drive 50 Ω transmission lines or fan-out to ≥10 LSTTL loads. |
| Input Compatibility | TTL-voltage compatible (VIH = 2 V, VIL = 0.8 V) - interoperable with legacy 74LS/74ALS logic without interface buffers. |
| Operating Temperature | −40°C to +85°C - qualified for industrial-grade embedded controllers and programmable logic backplanes. |
| Power Dissipation | 41 pF (enabled), 8 pF (disabled) - low dynamic capacitance reduces switching noise and system power at 1 MHz. |
| Latch-Up Immunity | 500 mA typical at 125°C - meets JEDEC JESD78 Class II requirements for ruggedness in transient-prone environments. |
Pinout & Package
74ACT11623DW uses a 24-pin SOIC (DW) package with 300-mil width, gull-wing leads, and center-aligned VCC/GND pins (pins 15/16 and 5/6) to minimize ground bounce and high-frequency noise.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A1–A8 | Input/Output port A | 8-bit bidirectional data bus interface; driven by or sourced from A-side system (e.g., CPU address/data bus). |
| B1–B8 | Input/Output port B | 8-bit bidirectional data bus interface; connects to peripheral or memory subsystem bus. |
| GAB | Enable input (B→A) | Active-high control: enables data transfer from B bus to A bus when GBA = L; disables A outputs when low. |
| GBA | Enable input (A→B) | Active-high control: enables data transfer from A bus to B bus when GAB = L; disables B outputs when low. |
| VCC | Power supply | Two pins (15, 16) provide low-inductance supply path; placed centrally to reduce loop area and EMI. |
| GND | Ground reference | Four pins (5, 6, 23, 24) ensure low-impedance return paths and stable reference for all I/Os. |
Key Features
| Feature | Design Value |
|---|---|
| Local bus-latch capability | Simultaneous assertion of GBA and GAB places device in transparent latch mode-retains last bus states without clocks or external storage. |
| Flow-through architecture | Input and output pins aligned on opposite sides (A1–A8 left, B1–B8 right) simplifies PCB routing and minimizes trace crossovers. |
| Center-pin VCC/GND configuration | Dual VCC (pins 15/16) and quad GND (pins 5/6/23/24) reduce supply impedance and suppress simultaneous switching noise (SSN). |
| TTL-voltage compatible inputs | Accepts standard TTL logic thresholds (VIH ≥ 2 V, VIL ≤ 0.8 V), eliminating need for level translators in mixed-logic systems. |
| EPIC 1-µm CMOS process | Delivers high speed with low static current (ICC ≤ 40 µA) and robust latch-up immunity (500 mA typical at 125°C). |
Applications
| Industrial Backplane Interface | Legacy System Bus Extension |
|---|---|
|
Use Scenario: Interfacing a modern microcontroller unit to an older ISA-style parallel bus in factory automation PLC modules. IC Role / Device Role / Timing Role: Bidirectional transceiver managing data flow between CPU and legacy I/O expansion cards with timing-independent handshaking. Use Value: Eliminates need for discrete direction-control logic and level shifters while preserving signal integrity across 16-bit wide bus segments. |
Use Scenario: Extending a Z80-based single-board computer's data bus to external memory-mapped peripherals using passive backplane wiring. IC Role / Device Role / Timing Role: Asynchronous bus repeater enabling clean signal regeneration and isolation between bus segments with independent enable control. Use Value: Prevents loading-induced timing skew and allows hot-swap-capable peripheral insertion without bus contention. |
| Embedded Control Data Multiplexing | Programmable Logic Interconnect |
|
Use Scenario: Sharing a single 16-bit data path between FPGA configuration memory and real-time sensor acquisition circuitry in medical instrumentation. IC Role / Device Role / Timing Role: Dual-enable-controlled bidirectional switch that isolates FPGA config bus during runtime sensor reads. Use Value: Enables time-multiplexed resource sharing without external arbitration logic or clock domain crossing circuitry. |
Use Scenario: Connecting multiple CPLD-based control modules on a shared local bus in test equipment chassis with modular firmware updates. IC Role / Device Role / Timing Role: State-retentive transceiver holding bus values during CPLD reconfiguration cycles to prevent system glitches. Use Value: Maintains stable bus states during partial reconfiguration windows-critical for glitch-free operation in deterministic control loops. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bidirectional bus transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 74ACT16245DW | Octal (8-bit), not 16-bit; single-direction control (OE only); no dual-enable latching mode. | Lacks simultaneous A↔B latching; requires external logic for bidirectional state retention. | Select when only unidirectional or simpler enable control suffices and board space permits two devices for 16-bit width. |
| SN74LVC16245ADGGR | 3.3 V only (1.65–3.6 V); higher speed (tPD ≤ 4.2 ns); lower drive (±24 mA same, but VOH/VOL optimized for 3.3 V). | Not voltage-compatible with 5 V TTL buses; requires level translation if interfacing legacy 5 V systems. | Prefer for new 3.3 V designs where lower power and faster timing outweigh compatibility with existing 5 V infrastructure. |
Compared with 74ACT11623DW, the 74ACT16245DW provides half the bus width and no dual-enable latching, while SN74LVC16245ADGGR offers superior speed and density but mandates 3.3 V operation-making 74ACT11623DW uniquely suited for robust, self-contained 5 V bidirectional bus isolation with state retention.
Availability
74ACT11623DW is available at Aetrix Electronics and suitable for industrial backplane interfaces, legacy system bus extensions, and embedded control data multiplexing requiring stable component supply, long-term lifecycle support, and RoHS-compliant green packaging.
Supply support for 74ACT11623DW 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 founded in 1930, specializing in analog, embedded processing, and logic solutions for industrial, automotive, and communications markets.
The 74ACT11623DW belongs to TI's advanced CMOS logic family, engineered specifically for high-noise-margin, low-skew bidirectional bus interfacing in industrial control and legacy system integration applications.
FAQ
What is the function of the GBA and GAB pins on the 74ACT11623DW?
The GBA and GAB pins are active-high enable inputs that independently control data direction: GBA enables A→B transfer, GAB enables B→A transfer. When both are high, the 74ACT11623DW enters transparent latch mode-reinforcing bus states without external clocks. This dual-enable architecture eliminates need for external direction logic and supports true bidirectional isolation.
Does the 74ACT11623DW support 3.3 V operation?
No, the 74ACT11623DW is specified only for 4.5 V to 5.5 V supply operation per its recommended conditions. Its TTL-compatible inputs and CMOS outputs are optimized for 5 V systems; applying 3.3 V violates minimum VCC and may cause undefined logic states or excessive ICC. For 3.3 V designs, consider SN74LVC16245ADGGR instead.
Can the 74ACT11623DW be used for bus hold or auto-latching without external components?
Yes-the 74ACT11623DW supports intrinsic bus state retention: when both GBA and GAB are asserted high, each output actively drives its corresponding input, maintaining prior logic states on both A and B buses. This self-latching behavior requires no external capacitors, resistors, or clocks, making it ideal for glitch-free bus isolation during processor reset or peripheral reconfiguration.
What is the significance of the center-pin VCC and GND configuration in the 74ACT11623DW SOIC package?
The 74ACT11623DW places VCC on pins 15 and 16 and GND on pins 5, 6, 23, and 24-centered and distributed-to minimize power/ground loop inductance. This layout reduces simultaneous switching noise (SSN), improves high-speed signal integrity, and lowers ground bounce during fast 16-bit bus transitions-critical for stable operation in dense industrial PCBs.
Is the 74ACT11623DW pin-compatible with other 24-pin SOIC transceivers like the 74ACT16245?
No-74ACT11623DW has a unique pinout optimized for dual-enable bidirectional control and flow-through routing: A1–A8 occupy left side (pins 1–4, 7–10), B1–B8 occupy right side (pins 13–16, 19–22), with GAB/GBA on pins 11/12 and VCC/GND centered. The 74ACT16245DW uses different pin assignments (e.g., OE on pin 1, directional control only), so direct PCB replacement is not possible.
74ACT11623DW Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74ACT
- Package/Case:
- 24-SOIC (0.295", 7.50mm Width)
- 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:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 24-SOIC
74ACT11623DW FAQ
1.How can I place an order for 74ACT11623DW through Aetrix?
Please submit a Request for Quotation (RFQ) for 74ACT11623DW 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 74ACT11623DW reliable?
The price and inventory of 74ACT11623DW are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74ACT11623DW is usually 5 days.
3.What payment methods are accepted for 74ACT11623DW?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74ACT11623DW transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74ACT11623DW?
74ACT11623DW orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74ACT11623DW 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 74ACT11623DW?
For technical support, including 74ACT11623DW datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74ACT11623DW requirements.
6.How does Aetrix verify that 74ACT11623DW is sourced from the original manufacturer or authorized distributors?
All 74ACT11623DW 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 74ACT11623DW meets industry standards.
7.What is the process for return or replacement of 74ACT11623DW?
All 74ACT11623DW units undergo pre-shipment inspection (PSI). If there is an issue with 74ACT11623DW, 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 74ACT11623DW part is unused and in its original packaging.
Return procedure for 74ACT11623DW:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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