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Texas Instruments SN74LVTH543DGVR
- Part No.:
- SN74LVTH543DGVR
- Manufacturer:
- Texas Instruments
- Package:
- 24-TFSOP (0.173", 4.40mm Width)
- Datasheet:
-
SN74LVTH543DGVR.pdf
- Description:
- IC TXRX NON-INVERT 3.6V 24TVSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,458
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Product details
Overview
SN74LVTH543DGVR from Texas Instruments is an octal transceiver with dual-directional latched data flow, supporting mixed-mode 5-V input/output signaling on a 3.3-V VCC. It features bus-hold on all data inputs, Ioff and power-up 3-state for hot insertion, and operates down to 2.7 V. Used in voltage-level bridging between legacy 5-V logic and modern 3.3-V systems.
For engineers reviewing the SN74LVTH543DGVR datasheet, SN74LVTH543DGVR pinout, SN74LVTH543DGVR application, or SN74LVTH543DGVR equivalent, key selection criteria include bidirectional latch-enable control, bus-hold elimination of external resistors, hot-insertion support, and guaranteed operation across −40°C to 85°C.
Technical Context
The SN74LVTH543DGVR implements two independent sets of D-type latches-one for A-to-B and one for B-to-A data flow-each with dedicated latch-enable (LEAB/LEBA) and output-enable (OEAB/OEBA) controls. CEAB and CEBA enable signals gate data entry and output activation per direction.
It integrates active bus-hold circuitry on all A and B port inputs, eliminating need for external pullup/pulldown resistors. Ioff protection disables outputs during power-down to prevent backflow current, while power-up 3-state ensures high-impedance outputs during VCC ramp-up.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 2.7 V to 3.6 V - supports unregulated battery operation and stable low-voltage rail design |
| IOL / IOH | 64 mA / −32 mA at VCC = 3 V - drives standard TTL loads without external buffers |
| tPLH/tPHL | 1.2 ns to 3.7 ns (VCC = 3.3 V, CL = 50 pF) - enables high-speed bidirectional data transfer in timing-critical interfaces |
| Bus-Hold Current | ±500 µA at VCC = 3.6 V - maintains valid logic state on floating inputs without external components |
| Ioff | ±100 µA at VCC = 0 V - prevents damaging current backflow during hot-swap or partial power-down |
| ESD Rating | 2000-V HBM, 200-V MM - meets industrial-grade robustness requirements for board-level handling |
| Latch-Up | >500 mA per JESD 17 - ensures immunity to destructive latch-up under transient overvoltage conditions |
Pinout & Package
TSSOP-24 package (PW/DGV), 4.4 mm × 5.0 mm body, 0.65 mm pitch, 1.2 mm max height, RoHS-compliant NIPDAU lead finish, MSL Level-1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3, 4, 5, 6, 7, 8 | A1–A8 Inputs | Data inputs for A-to-B latching path; feature bus-hold for floating-input resilience |
| 9, 10, 11, 12, 13, 14, 15, 16 | B1–B8 I/Os | 3-state bidirectional data terminals for B-side; driven only when OEAB/OEBA and CEAB/CEBA active |
| 17 | LEAB | Latch-enable for A-to-B path: low = transparent, rising edge = store A data into B latches |
| 18 | OEAB | Output-enable for B-side outputs: low = active drive, high = high-impedance |
| 19 | CEAB | A-to-B chip-enable: must be low to allow A data entry or B output activation |
| 20 | GND | Ground reference for all internal logic and I/O circuits |
| 21 | VCC | 3.3-V supply input; supports operation down to 2.7 V with full specification compliance |
| 22 | CEBA | B-to-A chip-enable: must be low to allow B data entry or A output activation |
| 23 | LEBA | Latch-enable for B-to-A path: low = transparent, rising edge = store B data into A latches |
| 24 | OEBA | Output-enable for A-side outputs: low = active drive, high = high-impedance |
Key Features
| Feature | Design Value |
|---|---|
| Mixed-mode signal interface | Accepts 5-V inputs and drives 5-V outputs while powered from 3.3-V VCC, enabling seamless level translation without external translators |
| Bus-hold on all A/B ports | Eliminates need for external pullup/pulldown resistors on unused or undriven data lines, reducing BOM count and layout area |
| Hot-insertion support | Ioff and power-up 3-state ensure safe insertion into live backplanes or hot-swap modules without disrupting system operation |
| Dual independent latch paths | Separate LE/OE/CE controls per direction allow asynchronous, non-blocking bidirectional data flow in shared-bus architectures |
| Low ground bounce | VOLP < 0.8 V at VCC = 3.3 V - minimizes noise coupling into adjacent signal or power domains |
Applications
| Industrial Backplane Interface | Legacy System Upgrades |
|---|---|
|
Use Scenario: Interfacing 3.3-V FPGA I/O banks to existing 5-V industrial backplane buses with strict timing and noise constraints. IC Role / Device Role / Timing Role: Bidirectional level-translating transceiver with latch synchronization to align data capture with clock edges on both sides. Use Value: Eliminates discrete level shifters and external bus-hold resistors, reducing component count by ≥4 parts per channel and improving signal integrity via controlled slew rates. |
Use Scenario: Retrofitting aging PLC controller boards with modern low-voltage microcontrollers while retaining 5-V sensor/actuator interfaces. IC Role / Device Role / Timing Role: Voltage-tolerant octal transceiver providing buffered, latched data exchange between 3.3-V MCU and 5-V peripheral subsystems. Use Value: Enables drop-in replacement of obsolete 5-V-only transceivers without redesigning power delivery or adding external voltage translators. |
| Hot-Swappable Module Card | Test Equipment Signal Routing |
|
Use Scenario: Carrier board in modular instrumentation where daughter cards are inserted/removed during system operation. IC Role / Device Role / Timing Role: Hot-insertion–qualified transceiver isolating card-side logic from backplane during insertion/removal sequences. Use Value: Prevents bus contention and power-supply glitches via Ioff and power-up 3-state, ensuring uninterrupted host operation during field maintenance. |
Use Scenario: Automated test equipment (ATE) switching matrix routing digital stimulus/response signals between DUT and instruments. IC Role / Device Role / Timing Role: Latched bidirectional buffer enabling precise timing-controlled signal capture and injection with minimal skew. Use Value: Provides deterministic setup/hold margins (tsu = 0.2 ns, th = 0.5 ns at VCC = 2.7 V) critical for sub-10 ns test cycle times. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC245APWR | Non-latched, no bus-hold, lower drive (24 mA), no Ioff - requires external pullups and lacks hot-insertion support | Suitable for simple unidirectional or non-latched bidirectional buffering where timing control is less critical | Select when latch functionality is unnecessary and cost reduction outweighs robustness requirements |
| SN74AVC8T245RHLR | Auto-direction sensing, no LE/OE separation, higher speed (tpd = 2.2 ns), but no bus-hold or Ioff | Better for high-throughput data pipes with automatic direction detection; unsuitable for controlled latch timing or hot-swap | Prefer when direction control is software-managed and bus-hold/Ioff are not required |
Compared with SN74LVC245APWR and SN74AVC8T245RHLR, the SN74LVTH543DGVR uniquely delivers latch-controlled bidirectional flow, integrated bus-hold, and verified hot-insertion capability - making it the only choice for deterministic timing, floating-input resilience, and live-module replacement in industrial systems.
Availability
SN74LVTH543DGVR is available at Aetrix Electronics and suitable for industrial backplane interfaces, legacy system upgrades, hot-swappable module cards, and automated test equipment requiring stable component supply and long-term lifecycle assurance.
Supply support for SN74LVTH543DGVR 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 industrial and automotive qualification experience.
The SN74LVTH543DGVR belongs to TI's LVTH logic family, designed specifically for robust mixed-voltage interfacing in harsh environments where reliability, latch control, and hot-swap capability are mandatory.
FAQ
What is the operating temperature range for the SN74LVTH543DGVR?
The SN74LVTH543DGVR is specified for operation from −40°C to +85°C ambient temperature. This industrial-grade range is validated across all electrical parameters including propagation delay, output drive strength, and bus-hold performance, making it suitable for deployment in factory automation, outdoor infrastructure, and transportation control systems where thermal extremes occur.
Does the SN74LVTH543DGVR require external pullup resistors on its data inputs?
No, the SN74LVTH543DGVR includes active bus-hold circuitry on all A1–A8 and B1–B8 inputs, which maintains a valid logic state on floating or undriven lines. Using external pullup or pulldown resistors with the SN74LVTH543DGVR is explicitly discouraged in the datasheet, as it may interfere with bus-hold operation and increase power consumption unnecessarily.
Can the SN74LVTH543DGVR be used in hot-swap applications?
Yes, the SN74LVTH543DGVR is fully specified for hot-insertion applications. Its Ioff circuitry disables outputs when VCC = 0 V, preventing damaging current backflow, and its power-up 3-state ensures outputs remain high-impedance during VCC ramp-up - both features are verified per JEDEC standards and documented in the SCBS704F datasheet.
What is the maximum output drive capability of the SN74LVTH543DGVR?
The SN74LVTH543DGVR delivers up to 64 mA sink current (IOL) and −32 mA source current (IOH) per output at VCC = 3 V. This allows direct driving of standard TTL loads without external buffers, and is fully characterized across the entire recommended operating range (2.7 V to 3.6 V) and temperature span (−40°C to 85°C).
How does the latch-enable function work on the SN74LVTH543DGVR?
The SN74LVTH543DGVR provides separate latch-enable inputs (LEAB for A-to-B, LEBA for B-to-A). When LEAB is low, the A-to-B path is transparent; a low-to-high transition stores the current A-port data into the B latches. The same behavior applies to LEBA for B-to-A flow. This enables precise, edge-triggered data capture synchronized to system clocks or control signals - a core capability absent in non-latched transceivers like the SN74LVC245.
SN74LVTH543DGVR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74LVTH
- Package/Case:
- 24-TFSOP (0.173", 4.40mm 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:
- 32mA, 64mA
- Voltage - Supply:
- 2.7V ~ 3.6V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 24-TVSOP
SN74LVTH543DGVR FAQ
1.How can I place an order for SN74LVTH543DGVR through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74LVTH543DGVR 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 SN74LVTH543DGVR reliable?
The price and inventory of SN74LVTH543DGVR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74LVTH543DGVR is usually 5 days.
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SN74LVTH543DGVR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74LVTH543DGVR 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 SN74LVTH543DGVR?
For technical support, including SN74LVTH543DGVR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74LVTH543DGVR requirements.
6.How does Aetrix verify that SN74LVTH543DGVR is sourced from the original manufacturer or authorized distributors?
All SN74LVTH543DGVR 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 SN74LVTH543DGVR meets industry standards.
7.What is the process for return or replacement of SN74LVTH543DGVR?
All SN74LVTH543DGVR units undergo pre-shipment inspection (PSI). If there is an issue with SN74LVTH543DGVR, 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 SN74LVTH543DGVR part is unused and in its original packaging.
Return procedure for SN74LVTH543DGVR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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