My Inquiry
My Account
NXP Semiconductors 74LVC543ADB,112
- Part No.:
- 74LVC543ADB,112
- Manufacturer:
- NXP Semiconductors
- Package:
- 24-SSOP (0.209", 5.30mm Width)
- Datasheet:
-
74LVC543ADB,112.pdf
- Description:
- IC TXRX NON-INVERT 3.6V 24SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,725
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
74LVC543ADB,112 from NXP Semiconductors (formerly Philips) is an octal D-type registered transceiver with dual-direction 3-state bus interface, operating from 1.2 V to 3.6 V supply, featuring 5 V tolerant I/O, −40 °C to +125 °C temperature range, and 24-pin SSOP package. It enables bidirectional data latching and bus isolation in high-density logic systems such as industrial controllers and embedded communication modules.
For engineers reviewing the 74LVC543ADB,112 datasheet, 74LVC543ADB,112 pinout, 74LVC543ADB,112 application, or 74LVC543ADB,112 equivalent, key selection criteria include bidirectional latch enable control (LEAB/LEBA), independent output enable per direction (OEAB/OEBA), 3-state non-inverting outputs, 5 V tolerance for mixed-voltage interfacing, and propagation delay ≤7.0 ns at 3.3 V.
Technical Context
The 74LVC543ADB,112 implements two independent 8-bit D-type latch banks-one for A-to-B and one for B-to-A data flow-with separate latch enable (LEAB/LEBA) and output enable (OEAB/OEBA) controls. This architecture supports simultaneous storage and bus driving in either direction without contention.
It uses Si-gate CMOS technology compliant with JEDEC JESD8-B/JESD36, enabling direct TTL-level interfacing and high-impedance shutdown when VCC = 0 V. Input/output capacitance is 5.0 pF, and power dissipation capacitance is 15.0 pF (outputs enabled) or 3.0 pF (outputs disabled) at 3.3 V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 1.2 V to 3.6 V - supports low-voltage operation while maintaining 5 V tolerant I/O for legacy system integration |
| Propagation Delay (An↔Bn) | 1.0 ns (min) to 7.0 ns (max) at VCC = 3.0–3.6 V - ensures timing-critical bidirectional bus synchronization |
| I/O Voltage Tolerance | 0 V to 5.5 V - allows safe interfacing with 5 V logic without level shifters |
| Operating Temperature | −40 °C to +125 °C - qualified for automotive under-hood and industrial control environments |
| 3-State Output Enable Time | 1.3 ns (typ) to 10.0 ns (max) - fast bus turnaround minimizes dead time in shared-data-path systems |
| Input Capacitance | 4.0 pF - low loading preserves signal integrity on high-speed parallel buses |
| Power Dissipation Capacitance | 15.0 pF (enabled), 3.0 pF (disabled) - enables accurate dynamic power estimation per latch |
Pinout & Package
74LVC543ADB,112 is housed in a 24-pin plastic shrink small outline package (SSOP24), SOT340-1 footprint, body width 5.3 mm, pitch 0.65 mm. Pin 1 index located at top-left corner with notch marking orientation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (LEBA) | B-to-A latch enable input | Active LOW; controls transparency/storage of B→A data path - critical for synchronized capture of incoming bus data |
| 2 (OEBA) | B-to-A output enable input | Active LOW; enables/disables B-side drivers during B→A transfer - prevents bus contention |
| 3–10 (A0–A7) | A-side bidirectional I/O | 8-bit data port for A domain; functions as input or 3-state output depending on OEAB/EAB state |
| 11 (EAB) | A-to-B enable input | Active LOW; gates A→B data flow - used with LEAB to configure latch vs. transparent mode |
| 12 (GND) | Ground reference | 0 V return path for all internal logic and I/O - must be low-impedance for noise immunity |
| 13 (OEAB) | A-to-B output enable input | Active LOW; enables/disables A-side drivers during A→B transfer - isolates A bus when inactive |
| 14 (LEAB) | A-to-B latch enable input | Active LOW; samples A inputs into A latches on rising edge - essential for synchronous data capture |
| 15–22 (B7–B0) | B-side bidirectional I/O | 8-bit data port for B domain; functions as input or 3-state output depending on OEBA/EBA state |
| 23 (EBA) | B-to-A enable input | Active LOW; gates B→A data flow - paired with LEBA to manage B-side register behavior |
| 24 (VCC) | Positive supply | 1.2–3.6 V power rail - powers all logic and output buffers; decoupling required near pin |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent latch banks | Enables concurrent A→B and B→A data registration without arbitration logic or external timing control |
| Separate direction-specific controls | LEAB/OEAB and LEBA/OEBA allow asymmetric bus management - e.g., latch A→B while holding B→A in transparent mode |
| 5 V tolerant I/O | Eliminates need for external level translators when interfacing with legacy 5 V microcontrollers or peripherals |
| High-impedance on power loss | VCC = 0 V forces all outputs to Hi-Z - prevents back-driving powered subsystems during brownout or hot-swap events |
| JEDEC JESD8-B compliance | Guarantees interoperability with standard low-voltage CMOS families across voltage scaling boundaries |
Applications
| Industrial PLC Backplane Interface | Automotive Body Control Module |
|---|---|
Use Scenario: Bidirectional data exchange between CPU module and I/O expansion cards over shared parallel bus. IC Role / Device Role / Timing Role: Registered transceiver providing isolated, latched A↔B data paths with independent direction control and 3-state bus drive. Use Value: Enables deterministic read/write timing across noisy industrial backplanes using LEAB/LEBA sampling and OEAB/OEBA bus arbitration. | Use Scenario: Interfacing 3.3 V MCU with 5 V sensor cluster and actuator drivers in vehicle door module. IC Role / Device Role / Timing Role: Voltage-tolerant octal transceiver managing bidirectional diagnostic and control signals with latch synchronization. Use Value: 5 V tolerant I/O eliminates level-shifter components; −40 °C to +125 °C rating ensures reliability in under-door thermal environments. |
| Embedded Communication Bridge | Test Equipment Data Acquisition |
Use Scenario: Bridging two asynchronous processor subsystems sharing memory-mapped registers via parallel bus. IC Role / Device Role / Timing Role: Dual-latch transceiver acting as synchronous interface buffer with direction-selectable data staging. Use Value: Back-to-back latches (A→B and B→A) allow pipelined transfers - reducing inter-subsystem latency versus single-register solutions. | Use Scenario: High-speed digital pattern capture from DUT using FPGA-controlled parallel bus with precise timing alignment. IC Role / Device Role / Timing Role: Registered transceiver capturing and forwarding 8-bit test vectors with sub-ns propagation control and 3-state isolation. Use Value: 7.0 ns max propagation delay and 1.5 ns skew guarantee cycle-accurate sampling at ≥100 MHz bus rates. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal registered transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC543APWRE4 | TSSOP24 package (SOT355-1); identical electrical specs and pinout; same 1.2–3.6 V range and 5 V tolerance | Lower profile (1.2 mm height vs. 2.0 mm for SSOP); better thermal performance in dense layouts | Select for space-constrained PCBs requiring same functionality with improved thermal dissipation |
| 74ALVC543MTCX | Higher speed: 5.2 ns typical propagation delay (vs. 3.0 ns for 74LVC543ADB,112); same 24-pin TSSOP package; 2.3–3.6 V only | Not suitable for 1.2–2.2 V operation; optimized for high-frequency clock domains rather than ultra-low-voltage systems | Select when maximum speed is prioritized over wide voltage range - e.g., >125 MHz bus timing budgets |
Compared with SN74LVC543APWRE4 and 74ALVC543MTCX, the 74LVC543ADB,112 offers optimal balance of wide supply range (1.2–3.6 V), full 5 V I/O tolerance, and SSOP24 mechanical compatibility - making it preferred for industrial designs requiring robustness across voltage and thermal extremes.
Availability
74LVC543ADB,112 is available at Aetrix Electronics and suitable for industrial PLC backplanes, automotive body control modules, embedded communication bridges, and test equipment data acquisition requiring stable component supply across extended temperature and voltage ranges.
Supply support for 74LVC543ADB,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 74LVC543ADB,112 belongs to NXP's LVC (Low-Voltage CMOS) logic family, designed specifically for high-speed, low-power bidirectional bus interfacing in mixed-voltage embedded systems where reliability across −40 °C to +125 °C is mandatory.
FAQ
What is the maximum operating frequency supported by the 74LVC543ADB,112?
The 74LVC543ADB,112 does not specify a maximum clock frequency directly, but its propagation delay (tPHL/tPLH) is 1.0 ns minimum to 7.0 ns maximum at VCC = 3.0–3.6 V. Based on this, reliable operation up to approximately 100 MHz is achievable in well-designed bus systems with controlled trace lengths and proper termination. The 74LVC543ADB,112 is intended for synchronous latch-based data transfer, not continuous clocked operation like a shift register.
Does the 74LVC543ADB,112 support hot insertion or live bus connection?
Yes - the 74LVC543ADB,112 features high-impedance outputs when VCC = 0 V, and its 5 V tolerant I/O pins (rated to 5.5 V) allow safe connection to powered buses before VCC is applied. This makes the 74LVC543ADB,112 suitable for hot-plug applications such as modular I/O cards, provided current limits (±50 mA per I/O) and ESD protection (2000 V HBM) are respected in system-level design.
Can the 74LVC543ADB,112 be used with a 2.5 V supply?
Yes - the 74LVC543ADB,112 is fully specified for operation from 1.2 V to 3.6 V, including 2.5 V. At 2.5 V, DC parameters such as VOH (≥2.2 V) and VOL (≤0.45 V) meet standard LVCMOS thresholds, and AC timing remains functional (e.g., tPHL/tPLH ≤9.5 ns). The 74LVC543ADB,112 maintains 5 V tolerance on all I/O regardless of VCC setting.
How does the latch enable (LEAB/LEBA) differ from the output enable (OEAB/OEBA) in the 74LVC543ADB,112?
In the 74LVC543ADB,112, LEAB/LEBA control data capture into internal D-type latches (transparent on LOW, store on rising edge), while OEAB/OEBA control driver activation (LOW = active output, HIGH = Hi-Z). They operate independently: for example, LEAB can hold A-data in latches while OEAB is HIGH to isolate B outputs - enabling data staging without bus activity. This separation is fundamental to the 74LVC543ADB,112's dual-role capability.
Is the 74LVC543ADB,112 pin-compatible with older 74 series transceivers like the 74LS543?
No - the 74LVC543ADB,112 is not pin-compatible with bipolar 74LS543. While both are octal registered transceivers, the 74LVC543ADB,112 uses a different pin assignment (e.g., LEBA at pin 1, OEBA at pin 2, EAB at pin 11) and requires CMOS-level control logic. Direct replacement would require PCB redesign. The 74LVC543ADB,112 is functionally compatible with other LVC-family transceivers like SN74LVC543APWRE4, which share identical pinout and logic behavior.
74LVC543ADB,112 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- 74LVC
- Package/Case:
- 24-SSOP (0.209", 5.30mm 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-SSOP
74LVC543ADB,112 FAQ
1.How can I place an order for 74LVC543ADB,112 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74LVC543ADB,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 74LVC543ADB,112 reliable?
The price and inventory of 74LVC543ADB,112 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74LVC543ADB,112 is usually 5 days.
3.What payment methods are accepted for 74LVC543ADB,112?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74LVC543ADB,112 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74LVC543ADB,112?
74LVC543ADB,112 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74LVC543ADB,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 74LVC543ADB,112?
For technical support, including 74LVC543ADB,112 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74LVC543ADB,112 requirements.
6.How does Aetrix verify that 74LVC543ADB,112 is sourced from the original manufacturer or authorized distributors?
All 74LVC543ADB,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 74LVC543ADB,112 meets industry standards.
7.What is the process for return or replacement of 74LVC543ADB,112?
All 74LVC543ADB,112 units undergo pre-shipment inspection (PSI). If there is an issue with 74LVC543ADB,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 74LVC543ADB,112 part is unused and in its original packaging.
Return procedure for 74LVC543ADB,112:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
74LVC543ADB,112 Tags
-
SN74LVC1G17DBVR
Texas Instruments
-
SN74LVC1G07DCKR
Texas Instruments
-
SN74LVC1G17DCKR
Texas Instruments
-
SN74LVC1G07DBVR
Texas Instruments
-
SN74LVC1G125DCKR
Texas Instruments
-
SN74AHCT1G126DBVR
Texas Instruments
-
SN74LVC1G125DBVR
Texas Instruments
-
SN74AHCT1G125DBVR
Texas Instruments
-
SN74LVC2G17DBVR
Texas Instruments
-
SN74LVC2G07DCKR
Texas Instruments
-
SN74LVC1G34DCKR
Texas Instruments
-
SN74LVC2G17DCKR
Texas Instruments
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
