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NXP Semiconductors 74LVT543D,112
- Part No.:
- 74LVT543D,112
- Manufacturer:
- NXP Semiconductors
- Package:
- 24-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
74LVT543D,112.pdf
- Description:
- IC TXRX NON-INVERT 3.6V 24SO
- Quantity:
- Payment:
- Shipping:
Inventory:4,295
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Product details
Overview
74LVT543D,112 from NXP Semiconductors (formerly Philips) is a 3.3V octal latched transceiver with dual-directional 3-state control, combining latch and bus transceiver functions in one 24-pin SO package. It provides bidirectional data flow between Port A and Port B with independent Latch Enable (LEAB/LEBA), Enable (EAB/EBA), and Output Enable (OEAB/OEBA) controls, +64mA sink / –32mA source drive capability, and TTL-compatible I/O for mixed-voltage 3.3V/5V system interfacing.
For engineers reviewing the 74LVT543D,112 datasheet, 74LVT543D,112 pinout, 74LVT543D,112 application, or 74LVT543D,112 equivalent, this device serves as a high-drive, latch-integrated bus interface for memory-mapped peripherals, FPGA-to-ASIC data bridging, and hot-pluggable backplane modules requiring deterministic data capture and bus-hold stability without external pull-ups.
Technical Context
The 74LVT543D,112 implements two independent 8-bit D-type latch banks-one for A→B and one for B→A-each with dedicated LE, E, and OE inputs enabling transparent, latched, or high-impedance states per direction. Its BiCMOS architecture delivers 2.3ns typical tPLH at 3.3V with 50pF load, while maintaining full 5V-tolerant inputs and bus-hold on all A-side data pins.
It supports live insertion/extraction via power-up 3-state and power-up reset behavior, and meets JEDEC Std 17 latch-up immunity (>500mA) and MIL-STD-883 Class 3015 ESD protection (>2000V HBM). The device operates across –40°C to +85°C with VCC from 2.7V to 3.6V and features zero bus current loading when outputs are tied to 5V buses.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Supply Range | 2.7V to 3.6V - Ensures stable operation in noisy 3.3V systems with ±0.3V margin |
| Output Drive | +64mA sink / –32mA source - Drives heavy capacitive loads and multiple TTL inputs directly |
| Propagation Delay | 2.3ns (tPLH, A→B, CL=50pF, VCC=3.3V) - Enables >200MHz data throughput in synchronous interfaces |
| Input Voltage Range | 0V to 5.5V - Allows direct connection to 5V logic without level shifters |
| Bus-Hold Current | ±75µA (VI = 2.0V or 0.8V, VCC = 3V) - Eliminates need for external pull-up resistors on unused A-port inputs |
| Quiescent ICCZ | 0.13mA (outputs disabled, VCC = 3.6V) - Minimizes standby power in low-power subsystems |
| ESD Protection | 2000V HBM (MIL-STD-883 Method 3015) - Supports handling in non-ESD-controlled assembly environments |
Pinout & Package
74LVT543D,112 is supplied in a 24-pin plastic small outline (SO) package (SOT137-1), 7.5mm body width, with standard 0.6mm lead pitch and gull-wing leads compatible with IPC-7351B SOIC-24 footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 14 | LEAB / LEBA | Active-Low latch enable for A→B or B→A path - Captures data on rising edge; enables deterministic sampling |
| 11, 23 | EAB / EBA | Active-Low enable for A→B or B→A path - Controls transparency/latching mode independently per direction |
| 2, 13 | OEAB / OEBA | Active-Low output enable for A→B or B→A path - Places respective port outputs in high-impedance state |
| 3–10 | A0–A7 | Port A bidirectional I/O - Features integrated bus-hold; tolerant to 5V inputs; drives 3.3V or 5V loads |
| 15–22 | B0–B7 | Port B bidirectional I/O - 3-state outputs only; no bus-hold; fully 5V-tolerant input capability |
| 12 | GND | Ground reference - Shared return for all I/O and supply currents; requires low-inductance PCB connection |
| 24 | VCC | 3.3V supply - Must be decoupled locally with ≥100nF ceramic capacitor near pin |
Key Features
| Feature | Design Value |
|---|---|
| Dual-path latching | Independent A→B and B→A latch banks allow simultaneous bidirectional data capture without arbitration logic |
| 5V-tolerant inputs | All A- and B-port inputs accept 0–5.5V signals while powered from 3.3V - eliminates level translators in mixed-voltage buses |
| Integrated bus-hold | Active on A0–A7 only - maintains valid logic states on floating inputs, reducing BOM count and layout complexity |
| Live insertion support | Power-up 3-state and power-up reset ensure outputs remain high-Z during hot-swap events - prevents bus contention |
| High-current drive | 64mA sink capability per B-output - drives terminated transmission lines or multiple 74-series loads without buffers |
Applications
| Memory-Mapped Peripheral Interface | FPGA-to-ASIC Data Bridge |
|---|---|
Use Scenario: Interfacing a 3.3V microcontroller with legacy 5V parallel EEPROM or SRAM using shared address/data bus. IC Role / Device Role / Timing Role: Acts as bidirectional voltage-tolerant transceiver with latch synchronization - isolates 5V memory timing from 3.3V core clock domain. Use Value: Eliminates discrete level shifters and glue logic; bus-hold prevents glitches during address setup; 64mA drive ensures clean signal integrity on loaded memory bus. |
Use Scenario: Connecting a Xilinx Spartan FPGA I/O bank (3.3V LVTTL) to an ASIC with 5V-tolerant but 3.3V-driven control interface. IC Role / Device Role / Timing Role: Provides direction-controlled, latched data transfer between asynchronous clock domains - captures FPGA outputs before ASIC sampling edge. Use Value: Independent LEAB/LEBA allows precise timing alignment; 2.3ns propagation delay preserves setup/hold margins; 5V tolerance avoids damage from ASIC I/O overshoot. |
| Hot-Pluggable Backplane Module | Industrial Control Bus Isolation |
Use Scenario: Adding a field-replaceable I/O module to a 5V backplane while maintaining 3.3V logic compatibility and zero bus disturbance during insertion. IC Role / Device Role / Timing Role: Serves as hot-swap buffer with power-up 3-state - holds outputs high-Z until VCC stabilizes and firmware enables communication. Use Value: Prevents bus contention during plug-in; latch function stores configuration data prior to full initialization; ESD rating withstands repeated handling. |
Use Scenario: Isolating a PLC's 5V sensor bus from a 3.3V ARM-based controller running real-time motion control firmware. IC Role / Device Role / Timing Role: Functions as deterministic, noise-immune data coupler - latches sensor readings synchronously to controller clock, rejecting transient spikes. Use Value: Bus-hold on A-port prevents floating inputs from inducing false triggers; 64mA sink handles long cable capacitance; latch enables atomic read of multi-byte sensor registers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal latched transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVT8986DBR | 16-bit version with single-direction latch control; no separate EAB/EBA; 3.3V-only I/O (no 5V tolerance) | Suitable for wider data paths where 5V interface is unnecessary and space permits larger SSOP-48 package | Select when higher bandwidth (16-bit) is required and system uses uniform 3.3V signaling throughout. |
| 74ALVT162245DGGR | 16-bit, non-latching, dual-supply (3.3V/5V) transceiver; no latch functionality; higher drive (+64mA/–64mA) | Used in high-speed unidirectional data highways (e.g., PCI-X traces); lacks storage capability for sampled data | Choose when bidirectional flow without latching is sufficient and maximum speed with matched drive strength is critical. |
Compared with SN74LVT8986DBR and 74ALVT162245DGGR, the 74LVT543D,112 uniquely combines octal width, dual-path latching, 5V-tolerant I/O, and bus-hold in a compact SO-24 package - making it optimal for space-constrained, mixed-voltage embedded systems requiring deterministic data capture and hot-swap resilience.
Availability
74LVT543D,112 is available at Aetrix Electronics and suitable for industrial control systems, FPGA prototyping platforms, and telecom line-card designs requiring stable component supply, long-term lifecycle assurance, and guaranteed traceability.
Supply support for 74LVT543D,112 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
NXP Semiconductors is a global semiconductor leader focused on secure connectivity solutions for automotive, industrial, and IoT applications, with roots in Philips' pioneering logic IC development.
The 74LVT543D,112 belongs to NXP's legacy LVT (Low-Voltage TTL) logic family, designed specifically for high-speed, low-noise 3.3V system interfacing with backward compatibility to 5V TTL infrastructure.
FAQ
What is the operating temperature range for the 74LVT543D,112?
The 74LVT543D,112 is rated for continuous operation from –40°C to +85°C ambient temperature, meeting industrial-grade reliability requirements. This range is validated across all electrical parameters including propagation delay, output drive, and bus-hold performance, and applies to the SO-24 (SOT137-1) package variant shipped as 74LVT543D,112.
Does the 74LVT543D,112 support live insertion into a powered 5V backplane?
Yes, the 74LVT543D,112 supports live insertion due to its power-up 3-state and power-up reset features. At power-on, all outputs enter high-impedance before VCC reaches operational threshold, preventing bus contention. Its 2000V HBM ESD rating and 5V-tolerant inputs further ensure robustness during hot-swap events in backplane applications.
How does bus-hold functionality work on the 74LVT543D,112, and which pins support it?
Bus-hold is implemented only on A0–A7 inputs of the 74LVT543D,112, providing ±75µA overdrive current to maintain valid logic states on floating pins. It eliminates external pull-up resistors and prevents metastability in unterminated stubs. B-port inputs lack bus-hold and require external termination if left unconnected.
Can the 74LVT543D,112 interface directly between a 3.3V FPGA and a 5V ADC without level shifters?
Yes - the 74LVT543D,112 accepts 0–5.5V input voltages on both A and B ports while operating from a 3.3V supply, and its outputs drive 3.3V logic levels compatible with FPGA I/O banks. This allows direct connection to 5V ADC control lines (e.g., CS#, RD#, WR#) and data bus lines without additional translation circuitry.
What is the maximum data rate supported by the 74LVT543D,112 in transparent mode?
In transparent mode (LEAB = L, EAB = L), the 74LVT543D,112 achieves 2.3ns typical propagation delay (tPLH) at 3.3V with 50pF load, supporting reliable data rates up to ~200MHz for short traces. For sustained high-speed operation, ensure controlled-impedance routing, local decoupling, and adherence to AC setup/hold times specified in the datasheet.
74LVT543D,112 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- 74LVT
- 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:
- 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-SO
74LVT543D,112 FAQ
1.How can I place an order for 74LVT543D,112 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74LVT543D,112 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 74LVT543D,112 reliable?
The price and inventory of 74LVT543D,112 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74LVT543D,112 is usually 5 days.
3.What payment methods are accepted for 74LVT543D,112?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74LVT543D,112 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74LVT543D,112?
74LVT543D,112 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74LVT543D,112 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 74LVT543D,112?
For technical support, including 74LVT543D,112 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74LVT543D,112 requirements.
6.How does Aetrix verify that 74LVT543D,112 is sourced from the original manufacturer or authorized distributors?
All 74LVT543D,112 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 74LVT543D,112 meets industry standards.
7.What is the process for return or replacement of 74LVT543D,112?
All 74LVT543D,112 units undergo pre-shipment inspection (PSI). If there is an issue with 74LVT543D,112, 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 74LVT543D,112 part is unused and in its original packaging.
Return procedure for 74LVT543D,112:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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