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Texas Instruments 74ACT16543DGGR
- Part No.:
- 74ACT16543DGGR
- Manufacturer:
- Texas Instruments
- Package:
- 56-TFSOP (0.240", 6.10mm Width)
- Datasheet:
-
74ACT16543DGGR.pdf
- Description:
- IC TXRX NON-INVERT 5.5V 56TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,432
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Product details
Overview
74ACT16543DGGR from Texas Instruments is a 16-bit registered transceiver IC with dual-directional 3-state outputs, TTL-voltage-compatible inputs, and flow-through architecture for optimized PCB layout. It operates from –40°C to 85°C at 4.5–5.5 V supply, supports independent A↔B data latching via separate LE/CE/OE controls, and is used in high-speed bus interface applications such as memory expansion and processor-to-peripheral data routing.
For engineers reviewing the 74ACT16543DGGR datasheet, 74ACT16543DGGR pinout, 74ACT16543DGGR application, or 74ACT16543DGGR equivalent, key selection criteria include bidirectional latch timing (tPLH/tPHL ≤ 10.5 ns), 24-mA drive strength, 56-pin TSSOP (DGG) package compatibility, and EPIC CMOS process reliability with 500-mA latch-up immunity.
Technical Context
The 74ACT16543DGGR implements two independent 8-bit registered transceiver channels-each with dedicated CEAB/LEAB/OEAB and CEBA/LEBA/OEBA control logic-enabling simultaneous or asynchronous bidirectional data transfer. Its flow-through pinout minimizes trace crossing, while distributed VCC/GND pins reduce high-speed switching noise.
Each channel features transparent latch mode (CE low + LE low) and storage mode (low-to-high LE transition), with 3-state output buffers controlled independently per direction. Input thresholds meet TTL voltage compatibility (VIH = 2 V, VIL = 0.8 V), and output drive capability is specified at ±24 mA under 4.5–5.5 V operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.5 V to 5.5 V - ensures compatibility with standard 5-V TTL and CMOS systems without level-shifting. |
| Operating Temperature | –40°C to 85°C - qualified for industrial-grade embedded and computing applications. |
| Output Drive | ±24 mA - sufficient to drive multiple TTL loads or terminate short stubs on parallel buses. |
| Propagation Delay | tPLH/tPHL ≤ 10.5 ns (max) - enables reliable operation in 50-MHz+ bus environments. |
| Latch-Up Immunity | 500 mA typical at 125°C - meets stringent robustness requirements for mission-critical digital interfaces. |
| Input Compatibility | TTL-voltage (VIH = 2 V, VIL = 0.8 V) - allows direct connection to legacy 5-V logic without interface circuitry. |
| Package | 56-pin TSSOP (DGG), 0.5-mm pitch - provides high I/O density in compact footprint (12.5 × 6.1 mm). |
Pinout & Package
74ACT16543DGGR is housed in a 56-pin Thin Shrink Small-Outline Package (TSSOP-DGG), measuring 12.5 mm × 6.1 mm with 0.5-mm lead pitch and exposed thermal pad (non-electrical). The package supports fine-pitch automated assembly and offers improved thermal performance over standard SSOP.
| 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; critical for bus arbitration and contention avoidance. |
| 1LEAB, 2LEAB, 1LEBA, 2LEBA | Latch Enable (active-low) | Controls transparent vs. stored mode for each 8-bit register; edge-triggered storage on low-to-high transition. |
| 1CEAB, 2CEAB, 1CEBA, 2CEBA | Chip Enable (active-low) | Gates data flow into latches; must be low for LE to take effect-prevents spurious latching during setup. |
| 1A1–1A8, 2A1–2A8 | Port A input/output | First and second 8-bit data lanes from A side; bidirectional I/O when paired with corresponding B ports. |
| 1B1–1B8, 2B1–2B8 | Port B input/output | First and second 8-bit data lanes to B side; functionally identical to A ports but electrically isolated. |
| VCC (Pins 7, 22, 35, 46, 50) | Power supply | Distributed VCC pins minimize IR drop and supply noise across high-speed switching activity. |
| GND (Pins 4, 11, 25, 32, 43, 53) | Ground reference | Multiple GND pins provide low-inductance return paths and reduce ground bounce in 16-bit parallel operation. |
Key Features
| Feature | Design Value |
|---|---|
| Flow-through architecture | Input and output pins arranged opposite each other on package edges-reduces layer count and signal crosstalk in dense PCB layouts. |
| Dual independent 8-bit registers | Enables split-bus operation (e.g., address/data separation) or full 16-bit transfer without external glue logic. |
| EPIC CMOS process | 1-μm technology delivering high noise immunity, low static power (ICC ≤ 80 μA), and robust latch-up resistance (500 mA @ 125°C). |
| 3-state output control per direction | Four independent OE inputs allow granular bus management-e.g., hold A→B traffic while servicing B→A requests. |
| TTL-compatible inputs | Accepts standard 5-V TTL logic levels directly-eliminates need for level translators in mixed-logic-system interfacing. |
Applications
| Memory Expansion Interface | Processor Local Bus Bridge |
|---|---|
|
Use Scenario: Connecting microprocessor data/address buses to external SRAM or Flash memory arrays with multiplexed or demultiplexed control. IC Role / Device Role / Timing Role: Registered transceiver providing synchronized, noise-immune bidirectional data transfer between CPU and memory subsystems. Use Value: Flow-through pinout simplifies routing of 16-bit data paths; latch timing parameters ensure setup/hold compliance with fast memory access cycles. |
Use Scenario: Isolating and buffering communication between host processor and peripheral controllers (e.g., UART, SPI master, DMA engine) on shared local bus. IC Role / Device Role / Timing Role: Directional bus repeater with independent enable controls, enabling time-multiplexed access to multiple peripherals. Use Value: Separate CE/LE/OE per channel prevents bus contention; ±24-mA drive sustains signal integrity across loaded backplane traces. |
| Industrial PLC I/O Module | Test Equipment Data Acquisition |
|
Use Scenario: Interfacing field-programmable gate array (FPGA) I/O banks to industrial I/O cards requiring galvanically isolated or level-shifted signals. IC Role / Device Role / Timing Role: Level-tolerant bus translator and register stage for deterministic sampling of sensor or actuator data streams. Use Value: TTL-compatible inputs accept direct connection to legacy PLC logic; latch function captures stable snapshots before FPGA processing. |
Use Scenario: Capturing parallel digital waveforms from DUTs (device under test) in automated test equipment with precise timestamping and buffering. IC Role / Device Role / Timing Role: High-speed input capture register with configurable enable/latch sequencing for synchronous sampling windows. Use Value: Sub-11-ns propagation delay and 4-ns data hold time support >50-MHz sampling rates; 3-state outputs allow multiplexing into shared acquisition FIFOs. |
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 transceiver; no internal registers-requires external clocking for data capture. | Suitable only where external timing control is available; lacks built-in storage for asynchronous handshaking. | Select when lower latency and simpler control logic are prioritized over latch functionality. |
| SN74LVTH16543DGGR | Lower-voltage (3.3-V) LVT logic family; VIH/VIL thresholds differ (VIH = 2.0 V min, VIL = 0.8 V max); same pinout. | Designed for mixed-voltage 3.3-V/5-V systems; not 5-V tolerant on inputs unless explicitly rated. | Choose for 3.3-V core systems needing backward compatibility with 5-V peripherals via level translation. |
Compared with 74ACT16543DGGR, the 74ACT16245DGGR eliminates internal latching-reducing latency but requiring external synchronization-while the SN74LVTH16543DGGR shifts to 3.3-V operation with identical pinout but different voltage thresholds and reduced noise margin at 5 V.
Availability
74ACT16543DGGR is available at Aetrix Electronics and suitable for industrial control systems, test instrumentation, and embedded computing platforms requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for 74ACT16543DGGR 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 heritage in high-reliability logic families including ACT, LVC, and AUP series.
The 74ACT16543DGGR belongs to TI's Widebus™ family of high-speed registered transceivers, designed specifically for noise-sensitive, high-density parallel bus applications in industrial, computing, and communications infrastructure.
FAQ
What is the maximum operating frequency supported by the 74ACT16543DGGR?
The 74ACT16543DGGR does not specify a maximum clock frequency, but its propagation delay (tPLH/tPHL ≤ 10.5 ns) and setup/hold times (tsu = 2.5 ns, th = 4 ns) support reliable operation in bus systems running up to approximately 50 MHz. Actual achievable frequency depends on board layout, load capacitance, and signal integrity margins. The 74ACT16543DGGR is optimized for burst-mode or strobed parallel transfers rather than continuous clocked operation.
Does the 74ACT16543DGGR support hot-swap or live-insertion?
No, the 74ACT16543DGGR is not designed for hot-swap operation. Its absolute maximum ratings do not include powered insertion protection, and the input clamp current (±20 mA) and lack of power-on reset or I/O weak pullups make it susceptible to bus contention or latch-up during live insertion. System-level protection circuitry would be required to enable safe hot-swap use of the 74ACT16543DGGR.
Can the 74ACT16543DGGR be used as two independent 8-bit transceivers?
Yes, the 74ACT16543DGGR contains two fully independent 8-bit registered transceiver sections (1A/1B and 2A/2B), each with dedicated CE, LE, and OE controls. This allows simultaneous or staggered operation-for example, using one section for address latching and the other for data transfer-without internal coupling or timing interference between channels.
What is the thermal performance of the 74ACT16543DGGR in its TSSOP package?
The 74ACT16543DGGR in the 56-pin TSSOP (DGG) package has a maximum power dissipation of 1 W at TA = 55°C in still air. Its thermal resistance (θJA) is not explicitly published, but typical DGG packages of this size exhibit θJA ≈ 60–75°C/W. For sustained operation near 85°C ambient, derating or minimal copper pour is recommended. The 74ACT16543DGGR's EPIC process inherently limits dynamic power, supporting stable thermal behavior under typical 16-bit bus toggle conditions.
Is the 74ACT16543DGGR pin-compatible with the obsolete 74ACT16543DLR SSOP variant?
Yes, the 74ACT16543DGGR (TSSOP-DGG) and 74ACT16543DLR (SSOP-DL) share identical pin numbering, signal assignment, and functional behavior. Both are 56-pin packages with 25-mil center-to-center spacing, enabling direct PCB footprint substitution. However, the DGG package is physically smaller (12.5 × 6.1 mm vs. 18.4 × 7.5 mm) and requires re-optimization of solder paste stencil and reflow profile due to finer pitch (0.5 mm vs. 0.65 mm).
74ACT16543DGGR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74ACT
- Package/Case:
- 56-TFSOP (0.240", 6.10mm 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-TSSOP
74ACT16543DGGR FAQ
1.How can I place an order for 74ACT16543DGGR through Aetrix?
Please submit a Request for Quotation (RFQ) for 74ACT16543DGGR 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 74ACT16543DGGR reliable?
The price and inventory of 74ACT16543DGGR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74ACT16543DGGR is usually 5 days.
3.What payment methods are accepted for 74ACT16543DGGR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74ACT16543DGGR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74ACT16543DGGR?
74ACT16543DGGR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74ACT16543DGGR 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 74ACT16543DGGR?
For technical support, including 74ACT16543DGGR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74ACT16543DGGR requirements.
6.How does Aetrix verify that 74ACT16543DGGR is sourced from the original manufacturer or authorized distributors?
All 74ACT16543DGGR 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 74ACT16543DGGR meets industry standards.
7.What is the process for return or replacement of 74ACT16543DGGR?
All 74ACT16543DGGR units undergo pre-shipment inspection (PSI). If there is an issue with 74ACT16543DGGR, 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 74ACT16543DGGR part is unused and in its original packaging.
Return procedure for 74ACT16543DGGR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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