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Texas Instruments 74ACT16543DGG
- Part No.:
- 74ACT16543DGG
- Manufacturer:
- Texas Instruments
- Package:
- 56-TFSOP (0.240", 6.10mm Width)
- Datasheet:
-
74ACT16543DGG.pdf
- Description:
- IC TXRX NON-INVERT 5.5V 56TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:238
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Product details
Overview
74ACT16543DGG from Texas Instruments is a 16-bit registered transceiver IC with dual 8-bit bidirectional data paths, 3-state outputs, TTL-voltage-compatible inputs, and flow-through pinout architecture optimized for PCB layout. It operates from 4.5 V to 5.5 V, supports –40°C to 85°C industrial temperature range, and delivers 24 mA output drive in both high- and low-level states - used in bus interface and data buffering applications between microcontrollers and peripheral subsystems.
For engineers reviewing the 74ACT16543DGG datasheet, 74ACT16543DGG pinout, 74ACT16543DGG application, or 74ACT16543DGG equivalent, key selection criteria include bidirectional latch enable control (LEAB/LEBA), independent output-enable per direction (OEAB/OEBA), 3.5 ns typical tPLH propagation delay, 12 pF I/O capacitance, and TSSOP-56 package compatibility with high-density board layouts.
Technical Context
The 74ACT16543DGG implements two independent octal D-type latched transceivers - each with dedicated CE, LE, and OE controls - enabling simultaneous or staggered A↔B data transfer. Its EPIC (Enhanced-Performance Implanted CMOS) 1-μm process ensures 500-mA latch-up immunity at 125°C and robust noise margin across full operating voltage and temperature ranges.
It features distributed VCC/GND pins to minimize high-speed switching noise, flow-through pin mapping (A-side inputs on left, B-side outputs on right), and true 3-state outputs with symmetrical ±24 mA drive capability. Input thresholds meet TTL logic levels (VIL ≤ 0.8 V, VIH ≥ 2.0 V), ensuring interoperability with legacy 5-V logic families.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.5 V to 5.5 V - supports standard 5-V logic rails with ±10% tolerance; enables direct interfacing with TTL and CMOS systems without level-shifting. |
| Operating Temperature | –40°C to +85°C - qualified for industrial environments; excludes military-grade 54-series extended range (–55°C to 125°C). |
| Output Drive | ±24 mA - provides sufficient current to drive multiple TTL loads or terminate short stubs on parallel buses without external buffers. |
| Propagation Delay | tPLH/tPHL = 3.5 ns / 3.1 ns (typ) - enables reliable operation up to ~100 MHz data rates in synchronous bus applications. |
| I/O Capacitance | Cio = 12 pF - low pin capacitance reduces signal distortion and dynamic power consumption during high-frequency toggling. |
| Power Dissipation Cap. | Cpd = 45 pF (outputs enabled) - allows accurate dynamic power estimation at 1 MHz with 50-pF load for thermal design. |
| Latch-Up Immunity | 500 mA at 125°C - exceeds JEDEC JESD78 requirements, ensuring robustness against transient current faults in noisy industrial settings. |
Pinout & Package
TSSOP-56 (DGG) package: 14.0 mm × 6.1 mm × 1.2 mm body, 0.5 mm pitch, lead-free CU-NiPdAu finish, moisture sensitivity level 1 (260°C reflow compatible). Pin 1 located at top-left corner (Q1 quadrant), marked by beveled corner.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1OEAB, 2OEAB, 1OEBA, 2OEBA | Output Enable (active-low) | Individually disables A→B or B→A outputs to high-impedance state; enables bus sharing without contention. |
| 1LEAB, 2LEAB, 1LEBA, 2LEBA | Latch Enable (active-low) | Controls transparent vs. storage mode for respective 8-bit register; low-to-high transition captures data. |
| 1CEAB, 2CEAB, 1CEBA, 2CEBA | Chip Enable (active-low) | Gates data flow into latches; must be low for LE to affect latch state or for OE to enable outputs. |
| A1–A8, B1–B8 (×2 sets) | Bidirectional Data I/O | True 3-state I/O ports - no internal direction control logic; direction determined by OE/CE/LE activation sequence. |
| VCC (pins 7, 22, 39, 54) | Power Supply | Distributed VCC pins reduce simultaneous switching noise and improve power integrity across wide bus widths. |
| GND (pins 4, 11, 26, 33, 46, 51) | Ground Reference | Multiple GND pins provide low-inductance return paths and stabilize reference for all 16 data channels. |
Key Features
| Feature | Design Value |
|---|---|
| Flow-through architecture | Input and output pins arranged on opposite sides of package - eliminates layer jumps and vias in dense PCB routing. |
| Dual independent 8-bit registers | Enables flexible configuration as two separate 8-bit transceivers (e.g., address/data separation) or one 16-bit path. |
| TTL-voltage-compatible inputs | Accepts standard 0.8 V / 2.0 V logic thresholds - interoperable with legacy 74LS, 74F, and microcontroller GPIO without level shifters. |
| Distributed VCC/GND pins | Four VCC and six GND pins minimize ground bounce and supply droop during simultaneous 16-bit switching events. |
| EPIC 1-μm CMOS process | Delivers AC performance comparable to bipolar logic while maintaining CMOS power efficiency and latch-up resilience. |
Applications
| Industrial Bus Interface | Memory Expansion Subsystem |
|---|---|
|
Use Scenario: Isolating and buffering address/data lines between an MCU and multiple peripheral ICs on a shared parallel bus. IC Role / Device Role / Timing Role: Registered transceiver providing controlled, edge-triggered data capture and 3-state isolation to prevent bus contention during multi-master arbitration. Use Value: Enables deterministic timing via LEAB/LEBA latch edges and eliminates metastability risk in asynchronous handshaking protocols. |
Use Scenario: Extending memory capacity in embedded controllers using external SRAM or Flash with multiplexed or demultiplexed buses. IC Role / Device Role / Timing Role: Bidirectional data register synchronizing read/write cycles between processor and memory devices with independent OE control per direction. Use Value: Supports burst-mode transfers with sub-10 ns propagation delay and maintains signal integrity across 16-bit wide traces up to 100 MHz. |
| Legacy System Upgrades | Test Equipment Backplane |
|
Use Scenario: Replacing obsolete 74F or 74AS transceivers in aging instrumentation or control hardware requiring drop-in 5-V logic compatibility. IC Role / Device Role / Timing Role: Pin-compatible functional upgrade delivering improved noise immunity, lower power, and higher drive strength than bipolar predecessors. Use Value: Eliminates need for redesign while extending product lifecycle - validated for same PCB footprints and timing budgets as 74ACT16245/16373. |
Use Scenario: Managing signal routing between modular instrument cards in automated test systems with hot-swappable backplanes. IC Role / Device Role / Timing Role: Direction-controlled data bridge isolating card-specific logic domains while supporting synchronized data capture and output staging. Use Value: Distributed power/ground pins suppress crosstalk across 16-channel interconnects; 500-mA latch-up rating prevents failure during insertion/removal transients. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar registered transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 74ACT16245DGGR | Non-latched 16-bit bus transceiver; no internal registers; relies on external clocking for synchronization. | Suitable for simple level translation or unidirectional buffering where timing registration is handled externally. | Select when deterministic latch timing is unnecessary and lower propagation delay (<3 ns) is prioritized over data hold capability. |
| SN74LVTH16543DGGR | Lower-voltage (3.3 V) LVT logic family; 2.7–3.6 V supply; TTL-compatible inputs but reduced noise margin vs. ACT. | Used in mixed-voltage systems where 3.3-V core logic interfaces with 5-V peripherals via level-shifted buses. | Choose for new 3.3-V designs requiring lower power and compatibility with LVCMOS I/O standards - not a direct replacement due to voltage incompatibility. |
Compared with 74ACT16543DGG, the 74ACT16245DGGR offers faster raw throughput but lacks on-chip registration for setup/hold control, while the SN74LVTH16543DGGR supports modern low-voltage domains but requires level-shifting for 5-V integration - making the 74ACT16543DGG optimal for legacy 5-V registered bus architectures.
Availability
74ACT16543DGG is available at Aetrix Electronics and suitable for industrial bus interface, memory expansion subsystems, legacy system upgrades, and test equipment backplane applications requiring stable component supply, long-term obsolescence management, and RoHS-compliant packaging.
Supply support for 74ACT16543DGG 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 expertise in high-reliability industrial and automotive ICs.
The 74ACT16543DGG belongs to TI's Widebus™ family of high-speed CMOS logic - engineered specifically for noise-immune, high-density parallel bus interfacing in industrial control, instrumentation, and computing infrastructure.
FAQ
What is the maximum clock frequency supported by the 74ACT16543DGG?
The 74ACT16543DGG does not operate from a clock input; it is edge-triggered via latch enable (LEAB/LEBA) signals. With typical tPLH = 3.5 ns and minimum pulse width tw = 7.5 ns, it supports reliable data capture at effective rates up to ~100 MHz in synchronous bus configurations - assuming proper PCB layout and termination.
Is the 74ACT16543DGG pin-compatible with the 74ACT16245?
No - the 74ACT16543DGG and 74ACT16245 have different pin functions and internal architectures. The 74ACT16543DGG includes dedicated latch enable (LE) and chip enable (CE) pins per 8-bit section, whereas the 74ACT16245 uses directional control (DIR) and output enable (OE). Their TSSOP-56 footprints differ in signal assignment and are not interchangeable without PCB revision.
Does the 74ACT16543DGG support hot-swap or live-insertion?
The 74ACT16543DGG is not explicitly rated for hot-swap operation. While its 500-mA latch-up immunity and distributed power/ground pins improve robustness, TI documentation does not specify IEC 61000-4-2 ESD or live-insertion qualification. For backplane applications requiring hot-swap, additional protection circuitry and sequencing controls are recommended.
Can the 74ACT16543DGG be used with 3.3-V logic systems?
The 74ACT16543DGG is specified only for 4.5–5.5 V operation and TTL-compatible input thresholds. Driving its inputs from 3.3-V logic may result in marginal VIH margin (2.0 V min required vs. 3.3-V logic high ≈ 3.3 V), but receiving 3.3-V outputs directly risks violating VIL specification. A level-shifter or buffer is required for reliable 3.3-V ↔ 5-V interfacing.
What is the thermal resistance (θJA) of the 74ACT16543DGG in TSSOP-56 package?
TI does not publish θJA for the 74ACT16543DGG specifically, but based on industry-standard TSSOP-56 thermal models and its 1 W maximum power dissipation rating at TA = 55°C, typical θJA is approximately 75°C/W on a 2-layer PCB with standard copper pour. For precise thermal design, TI recommends using the 74ACT16543DL (SSOP) variant's published θJA = 65°C/W as an upper-bound reference.
74ACT16543DGG Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74ACT
- Package/Case:
- 56-TFSOP (0.240", 6.10mm 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:
- 4.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 56-TSSOP
74ACT16543DGG FAQ
1.How can I place an order for 74ACT16543DGG through Aetrix?
Please submit a Request for Quotation (RFQ) for 74ACT16543DGG 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 74ACT16543DGG reliable?
The price and inventory of 74ACT16543DGG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74ACT16543DGG is usually 5 days.
3.What payment methods are accepted for 74ACT16543DGG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74ACT16543DGG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74ACT16543DGG?
74ACT16543DGG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74ACT16543DGG 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 74ACT16543DGG?
For technical support, including 74ACT16543DGG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74ACT16543DGG requirements.
6.How does Aetrix verify that 74ACT16543DGG is sourced from the original manufacturer or authorized distributors?
All 74ACT16543DGG 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 74ACT16543DGG meets industry standards.
7.What is the process for return or replacement of 74ACT16543DGG?
All 74ACT16543DGG units undergo pre-shipment inspection (PSI). If there is an issue with 74ACT16543DGG, 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 74ACT16543DGG part is unused and in its original packaging.
Return procedure for 74ACT16543DGG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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