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NXP Semiconductors 74LVC543APW,112
- Part No.:
- 74LVC543APW,112
- Manufacturer:
- NXP Semiconductors
- Package:
- 24-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
74LVC543APW,112.pdf
- Description:
- IC TXRX NON-INVERT 3.6V 24TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,730
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Product details
Overview
74LVC543APW,112 from NXP Semiconductors (formerly Philips) is an octal D-type registered transceiver with 3-state outputs, operating from 1.2 V to 3.6 V supply, supporting bidirectional data flow with independent A→B and B→A latch and output enables, and featuring 5 V tolerant I/O for mixed-voltage system interfacing in industrial bus architectures.
For engineers reviewing the 74LVC543APW,112 datasheet, 74LVC543APW,112 pinout, 74LVC543APW,112 application, or 74LVC543APW,112 equivalent, key selection considerations include its dual-direction latch control (LEAB/LEBA), separate output enables (OEAB/OEBA), 3.0 ns typical propagation delay at 3.3 V, TSSOP24 package compatibility, and −40 °C to +125 °C extended temperature operation.
Technical Context
The 74LVC543APW,112 implements two independent 8-bit register paths-A-to-B and B-to-A-each with dedicated latch enable (LEXX) and output enable (OEXX) inputs, enabling precise timing control of data capture and bus release. Its back-to-back D-latch architecture allows simultaneous storage and forwarding of data across both directions without contention.
It supports 5 V tolerant inputs/outputs while powered from as low as 1.2 V, complies with JEDEC JESD8-B/JESD36, and delivers CMOS-level power efficiency with 0.1 µA typical ICC at 3.6 V and 24 mA drive capability per output at 3.0 V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 1.2 V to 3.6 V - enables direct integration into low-voltage microcontroller buses and mixed-supply systems |
| I/O Voltage Tolerance | 0 V to 5.5 V - permits safe interfacing with legacy 5 V logic without level shifters |
| Propagation Delay (An↔Bn) | 1.0 ns (min) to 9.0 ns (max) at VCC = 3.0–3.6 V - ensures sub-10 ns timing margin for high-speed 8-bit bus transfers |
| Output Drive Strength | ±24 mA at VCC = 3.0 V - supports driving 50 pF loads across PCB traces or multiple CMOS inputs |
| Operating Temperature | −40 °C to +125 °C - qualified for under-hood automotive, industrial PLC, and harsh-environment embedded control |
| Input Capacitance | 4.0 pF - minimizes capacitive loading on upstream drivers and preserves signal integrity |
| Power Dissipation Capacitance | 15.0 pF per latch (outputs enabled) - enables accurate dynamic power estimation in clocked bus applications |
Pinout & Package
TSSOP24 plastic package (SOT355-1), 4.4 mm body width, 0.65 mm pitch, 24-pin surface-mount with exposed pad not connected electrically.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 14 | LEBA / LEAB | Active-LOW latch enable for B→A or A→B path - controls transparent vs. latched state of respective 8-bit register |
| 2, 13 | OEBA / OEAB | Active-LOW 3-state output enable - independently disables B or A port outputs to prevent bus contention |
| 11, 23 | EAB / EBA | Active-LOW direction enable - gates data flow into A or B latches; must be LOW for latch operation |
| 3–10, 15–22 | A0–A7 / B0–B7 | Bidirectional data terminals - function as inputs when receiving data, outputs when driving bus; 5 V tolerant |
| 12 | GND | Ground reference - common return for all signals and power; decoupling capacitor required adjacent to pin |
| 24 | VCC | Positive supply - powers internal logic and output buffers; requires local 100 nF ceramic decoupling |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent register paths | Separate LEAB/OEAB and LEBA/OEBA controls allow concurrent A→B latching and B→A output driving without arbitration logic |
| 5 V tolerant I/O | Enables direct connection to 5 V microcontrollers, FPGAs, or legacy peripherals while operating from 1.2–3.6 V core supply |
| Back-to-back D-latch architecture | Provides deterministic setup/hold timing (tsu = +1.5 ns, th = 0.6 ns at 3.3 V) for reliable capture of asynchronous bus data |
| High-impedance on power-down | Outputs enter high-Z state when VCC = 0 V - prevents back-driving of powered subsystems during hot-swap or partial power-down |
| ESD robustness | HBM >2000 V and MM >200 V - meets industrial IEC 61000-4-2 requirements without external protection components |
Applications
| Industrial PLC Backplane Interface | Automotive Body Control Module Bus Bridge |
|---|---|
Use Scenario: Interfacing a 3.3 V ARM-based main controller with legacy 5 V I/O expansion modules over a parallel backplane bus. IC Role / Device Role / Timing Role: Registered transceiver providing synchronized, direction-controlled data transfer between voltage domains with latch isolation to suppress noise-induced glitches. Use Value: Eliminates need for discrete level shifters and glue logic; 1.2 V minimum supply supports ultra-low-power sleep modes while retaining bus readiness. | Use Scenario: Bidirectional communication between a 2.5 V CAN controller MCU and 5 V analog sensor cluster in a vehicle door module. IC Role / Device Role / Timing Role: Octal registered buffer with independent A/B enables manages time-critical sensor readback and actuator command issuance without bus turnaround delay. Use Value: −40 °C to +125 °C rating ensures reliability in under-door environments; 24 mA drive sustains signal integrity across long harness traces. |
| Test Equipment Digital Pattern Generator | Medical Diagnostic Imaging Data Link |
Use Scenario: Generating and capturing synchronized 8-bit digital stimulus patterns in automated test equipment with mixed-voltage DUT interfaces. IC Role / Device Role / Timing Role: Latched transceiver captures DUT responses into local registers before serial upload, decoupling high-speed acquisition from slower host transfer. Use Value: 3.0 ns typical tPHL/tPLH enables >100 MHz pattern rates; 3-state outputs prevent interference during idle periods. | Use Scenario: Isolating and buffering real-time pixel data streams between a 3.3 V FPGA image processor and 5 V analog front-end ASIC in portable ultrasound units. IC Role / Device Role / Timing Role: Registered interface maintains data coherency across power domain boundaries while suppressing EMI from switching regulators. Use Value: Low 4.0 pF input capacitance minimizes jitter on high-frequency pixel clocks; ESD-hardened I/O protects against handling discharge during field servicing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal registered transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC543APWR | TI part in TSSOP24; identical pinout and AC/DC specs but different ESD rating (HBM >2000 V same, MM >100 V vs. 200 V) | Same industrial temperature range and 5 V tolerance; slightly lower MM ESD margin may require additional board-level protection in high-noise factory floors | Select SN74LVC543APWR only if TI supply chain alignment or existing TI design reuse is prioritized over maximum MM robustness |
| 74ALVC543PW,118 | NXP ALVC variant; higher speed (tPLH max 5.5 ns at 3.3 V) but narrower 2.3–3.6 V supply range and no 1.2 V operation | Not suitable for ultra-low-voltage battery-powered systems; better for high-throughput data acquisition where speed outweighs supply flexibility | Choose 74ALVC543PW,118 when >150 MHz bus timing is required and supply is stable at ≥2.3 V |
Compared with SN74LVC543APWR and 74ALVC543PW,118, the 74LVC543APW,112 uniquely balances wide supply range (1.2–3.6 V), full 5 V I/O tolerance, and extended temperature support - making it optimal for battery-backed, mixed-voltage, and thermally demanding embedded designs where flexibility and ruggedness are primary.
Availability
74LVC543APW,112 is available at Aetrix Electronics and suitable for industrial PLC backplanes, automotive body control modules, and medical imaging data links requiring stable component supply across extended temperature and mixed-voltage conditions.
Supply support for 74LVC543APW,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 portfolio.
The 74LVC543APW,112 belongs to NXP's LVC (Low-Voltage CMOS) logic family, designed specifically for energy-efficient, mixed-voltage digital interfacing in space-constrained and thermally challenging embedded systems.
FAQ
What is the maximum operating frequency supported by the 74LVC543APW,112?
The 74LVC543APW,112 does not specify a maximum clock frequency, as it is a registered transceiver-not a clocked sequential device-but its 1.0 ns minimum propagation delay (at VCC = 3.0–3.6 V) supports reliable 8-bit bus operation up to approximately 100 MHz in well-designed layouts with controlled trace impedance and proper termination. Actual usable rate depends on system-level timing margins including setup/hold and output enable/disable times.
Can the 74LVC543APW,112 operate with a 1.8 V supply?
Yes, the 74LVC543APW,112 is fully specified to operate from 1.2 V to 3.6 V, including 1.8 V. At 1.8 V, DC parameters such as VIH (minimum HIGH input = 1.2 V) and VOL (maximum LOW output = 0.3 V at 12 mA) remain valid, and AC performance degrades predictably-propagation delay increases to ≤15 ns (typical 8 ns), maintaining functionality in low-power portable and battery-operated systems.
Does the 74LVC543APW,112 support hot insertion or live bus swapping?
The 74LVC543APW,112 supports partial hot-swap capability due to its high-impedance OFF-state when VCC = 0 V and 5 V tolerant I/O, but it lacks dedicated hot-swap control features like slew-rate limiting or undervoltage lockout. For robust live insertion, external current-limiting resistors and sequencing supervision are recommended; the device itself will not be damaged by 5 V applied to I/O pins during power-up/down sequences.
How are the latch enable and output enable functions related in the 74LVC543APW,112?
In the 74LVC543APW,112, latch enable (LEAB/LEBA) and output enable (OEAB/OEBA) operate independently: LEAB controls whether A-data is captured into the A→B register (transparent on LOW, latched on rising edge), while OEAB determines whether the latched data appears on B-output pins (active LOW). Both must be asserted (LOW) for functional data transfer from A to B; disabling either breaks the signal path without affecting the other direction.
Is the 74LVC543APW,112 pin-compatible with older 74 series transceivers like the 74LS543?
No, the 74LVC543APW,112 is not pin-compatible with bipolar 74LS543 or CMOS 74HC543. It uses a distinct 24-pin TSSOP layout (SOT355-1) with different pin assignments-for example, LEAB is on pin 1, whereas LS543 places GND on pin 1. Direct replacement requires PCB redesign; however, its logic function (octal registered transceiver) and truth table behavior are functionally compatible when mapped through schematic adaptation.
74LVC543APW,112 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- 74LVC
- Package/Case:
- 24-TSSOP (0.173", 4.40mm 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:
- 1.2V ~ 3.6V
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 24-TSSOP
74LVC543APW,112 FAQ
1.How can I place an order for 74LVC543APW,112 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74LVC543APW,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 74LVC543APW,112 reliable?
The price and inventory of 74LVC543APW,112 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74LVC543APW,112 is usually 5 days.
3.What payment methods are accepted for 74LVC543APW,112?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74LVC543APW,112 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74LVC543APW,112?
74LVC543APW,112 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74LVC543APW,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 74LVC543APW,112?
For technical support, including 74LVC543APW,112 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74LVC543APW,112 requirements.
6.How does Aetrix verify that 74LVC543APW,112 is sourced from the original manufacturer or authorized distributors?
All 74LVC543APW,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 74LVC543APW,112 meets industry standards.
7.What is the process for return or replacement of 74LVC543APW,112?
All 74LVC543APW,112 units undergo pre-shipment inspection (PSI). If there is an issue with 74LVC543APW,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 74LVC543APW,112 part is unused and in its original packaging.
Return procedure for 74LVC543APW,112:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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