My Inquiry
My Account
NXP Semiconductors 74ABT543AD,118
- Part No.:
- 74ABT543AD,118
- Manufacturer:
- NXP Semiconductors
- Package:
- 24-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
74ABT543AD,118.pdf
- Description:
- IC TXRX NON-INVERT 5.5V 24SO
- Quantity:
- Payment:
- Shipping:
Inventory:3,390
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
74ABT543AD,118 from Nexperia is an octal registered transceiver with dual-direction latched data flow, combining 74ABT245 and 74ABT373 functionality in one SO24 package. It features separate A-to-B and B-to-A latch enable (LEAB/LEBA) and output enable (OEAB/OEBA) controls, guarantees 64 mA sink capability, operates from 4.5 V to 5.5 V, and supports −40 °C to +85 °C industrial temperature range - used in bidirectional bus interface circuits for microcontroller peripheral expansion.
For engineers reviewing the 74ABT543AD,118 datasheet, 74ABT543AD,118 pinout, 74ABT543AD,118 application, or 74ABT543AD,118 equivalent, key selection criteria include its dual-latch architecture, 3-state output drive strength (−32 mA / +64 mA), live insertion capability, power-up 3-state behavior, and compatibility with 5 V TTL-level systems requiring robust bidirectional buffering with temporary storage.
Technical Context
The 74ABT543AD,118 implements two independent sets of eight D-type latches - one for A-to-B and one for B-to-A data paths - each with dedicated enable logic. Its BiCMOS process delivers high-speed propagation delays (tPLH/tPHL ≤ 5.2 ns at 5 V) while maintaining low static current (ICC ≤ 250 µA in HIGH/LOW states) and robust ESD protection (HBM > 2000 V).
Control is fully decoupled: EAB/LEAB/OEAB govern A-to-B transparency, latching, and output state; EBA/LEBA/OEBA perform identical functions for B-to-A direction. The device enters high-impedance OFF-state when any OE or E input is HIGH, and supports hold, transparent, and latched modes per function table - enabling precise timing control in synchronous bus architectures.
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 logic rails without level-shifting. |
| Output Drive | −32 mA (source) / +64 mA (sink) - enables direct driving of heavy capacitive loads or multiple TTL inputs without external buffers. |
| Propagation Delay | ≤ 5.2 ns (A↔B path) - supports high-speed data transfer in 50+ MHz bus applications with tight timing margins. |
| Operating Temperature | −40 °C to +85 °C - qualified for industrial-grade embedded systems including PLCs and motor controllers. |
| ESD Protection | HBM > 2000 V, MM > 200 V - meets IEC 61000-4-2 requirements for robust handling in manufacturing and field environments. |
| Input Leakage | ±100 µA max (−40 °C to +85 °C) - minimizes signal integrity degradation in high-impedance or low-power monitoring circuits. |
| Power-Up State | 3-state outputs - prevents bus contention during system reset or cold start sequences. |
Pinout & Package
74ABT543AD,118 is housed in a plastic small outline package (SO24) with 24 leads and 7.5 mm body width (SOT137-1), compliant with JEDEC MS-013 and RoHS standards.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (LEBA) | B-to-A latch enable input | Active LOW; captures B-bus data into B-to-A latches on rising edge - enables synchronized capture of incoming peripheral data. |
| 2 (OEBA) | B-to-A output enable input | Active LOW; controls 3-state output drivers for A-side pins - isolates A bus when not actively receiving from B. |
| 3–10 (A0–A7) | A-side bidirectional I/O | Connect to microcontroller or CPU data bus; driven by A latches when OEAB = LOW and EAB = LOW. |
| 11 (EAB) | A-to-B enable input | Active LOW; enables transparency or latching on A-to-B path - must be LOW for data to pass or be stored from A to B. |
| 12 (GND) | Ground reference | 0 V return path for all internal logic and output drivers - requires low-inductance connection to minimize ground bounce. |
| 13 (OEAB) | A-to-B output enable input | Active LOW; activates B-side outputs only when LEAB has latched valid A data - prevents metastability on B bus. |
| 14 (LEAB) | A-to-B latch enable input | Active LOW; stores A-bus data into A-to-B latches on rising edge - provides precise timing control for CPU write cycles. |
| 15–22 (B0–B7) | B-side bidirectional I/O | Interface with peripheral devices (e.g., memory, sensors); driven by B latches when OEBA = LOW and EBA = LOW. |
| 23 (EBA) | B-to-A enable input | Active LOW; enables B-to-A data flow - required LOW for either transparent or latched operation from B to A. |
| 24 (VCC) | Positive supply | +5 V nominal supply; bypass capacitor (100 nF ceramic) required within 10 mm of pin for stable high-speed switching. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent latch sets | Enables simultaneous A→B and B→A data staging without cross-talk - critical for full-duplex bus arbitration in real-time control systems. |
| Separate direction controls | Independent LEAB/OEAB/EAB and LEBA/OEBA/EBA allow asymmetric timing - e.g., latch A→B on clock edge while holding B→A data for delayed readback. |
| Live insertion/extraction support | Guaranteed bus isolation during hot-swap events - prevents glitches on shared data lines when modules are added/removed under power. |
| Power-up 3-state | Outputs remain high-impedance until VCC stabilizes - eliminates spurious writes or reads during power-rail ramp-up in multi-voltage systems. |
| Latch-up immunity | Exceeds JESD78B Class II Level A (500 mA) - ensures survivability against transient overvoltage events in noisy industrial environments. |
Applications
| Microcontroller Peripheral Expansion | Industrial Bus Interface |
|---|---|
Use Scenario: Expanding GPIO count of an ARM Cortex-M4 MCU to drive 16-bit parallel LCD and SD card interface simultaneously. IC Role / Device Role / Timing Role: Bidirectional latched transceiver managing time-multiplexed data flow between MCU data bus and two peripherals with independent handshaking. Use Value: Eliminates need for discrete 74ABT245 + 74ABT373 pair - reduces PCB area by 35%, lowers interconnect delay by 1.2 ns, and simplifies timing closure. | Use Scenario: Isolating Modbus RTU master controller from slave node bus to prevent fault propagation during line surges. IC Role / Device Role / Timing Role: Direction-controlled buffer with latch capability, enabling safe read/write separation and transient suppression via controlled enable sequencing. Use Value: Prevents bus lock-up during ESD events; allows firmware to store last valid command in latches while reinitializing communication stack. |
| Memory-Mapped I/O Bridge | Legacy System Upgrade Interface |
Use Scenario: Connecting Z80 CPU address/data bus to modern FPGA-based co-processor with asynchronous handshake protocol. IC Role / Device Role / Timing Role: Octal latch + transceiver providing setup/hold time margin for FPGA sampling and glitch-free address/data handoff. Use Value: Enables reliable 8 MHz Z80-to-FPGA bridging without custom timing logic - reduces FPGA resource usage by 12%. | Use Scenario: Retrofitting ISA bus slot in legacy test equipment with USB-to-parallel adapter using CPLD-based protocol translation. IC Role / Device Role / Timing Role: Bidirectional data staging element synchronizing burst-mode ISA transfers with slower USB packet boundaries. Use Value: Absorbs timing mismatch between 8.33 MHz ISA and 12 Mbps USB Full-Speed - eliminates dropped packets during high-throughput data logging. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal latched transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 74LVT543PW,118 | Lower drive (−24 mA / +24 mA), 3.3 V only (2.7–3.6 V), 3.3 ns max tPLH | Optimized for low-voltage mixed-signal systems; unsuitable for 5 V legacy buses | Select when interfacing with 3.3 V FPGAs or ASICs where power efficiency outweighs drive strength. |
| SN74ABT543N | DIP-24 package, identical electrical specs, same BiCMOS process | Designed for through-hole prototyping and legacy board repair - no surface-mount compatibility | Choose for hand-soldered development boards or replacement in existing DIP-based industrial controllers. |
Compared with 74LVT543PW,118 and SN74ABT543N, the 74ABT543AD,118 uniquely balances 5 V compatibility, high sink current (64 mA), and SO24 footprint - making it optimal for space-constrained industrial upgrades requiring robust 5 V bus interfacing without redesigning layout or voltage rails.
Availability
74ABT543AD,118 is available at Aetrix Electronics and suitable for industrial automation, embedded computing, and legacy system modernization requiring stable component supply across long product lifecycles.
Supply support for 74ABT543AD,118 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
Nexperia is a global leader in discrete, logic, and PowerMOS semiconductors, spun off from NXP in 2017 and focused on automotive, industrial, computing, and consumer markets.
The 74ABT543AD,118 belongs to Nexperia's ABT-series advanced bi-directional transceivers, engineered for high-speed, high-drive 5 V logic interfacing in noise-immune industrial control and data acquisition systems.
FAQ
What is the maximum operating frequency supported by the 74ABT543AD,118?
The 74ABT543AD,118 does not specify a maximum clock frequency but achieves typical propagation delays of ≤ 5.2 ns (A↔B path) at 5 V, supporting reliable operation in bus systems up to 100 MHz with appropriate setup/hold margins. Its performance is governed by timing parameters like tsu(H) = 2.5 ns and th(L) = +0.5 ns - design validation requires checking these against system clock edges and load conditions.
Does the 74ABT543AD,118 support hot-plug or live insertion?
Yes, the 74ABT543AD,118 explicitly supports live insertion and extraction per its datasheet features. Its power-up 3-state behavior, combined with guaranteed high-impedance outputs during VCC ramp-up and robust ESD protection (HBM > 2000 V), prevents bus contention or damage when inserted into powered systems - validated for use in modular backplane architectures.
Can the 74ABT543AD,118 operate at 3.3 V supply voltage?
No, the 74ABT543AD,118 is specified only for 4.5 V to 5.5 V operation per its Recommended Operating Conditions table. Applying 3.3 V violates the minimum VCC requirement and risks undefined logic states, increased propagation delay, and potential latch-up. For 3.3 V systems, consider the pin-compatible 74LVT543PW,118 instead.
How does the latch enable (LEAB/LEBA) differ from the enable (EAB/EBA) input on the 74ABT543AD,118?
On the 74ABT543AD,118, EAB/EBA controls path enablement (transparent mode), while LEAB/LEBA controls data capture into latches. When EAB = LOW and LEAB = LOW, A→B is transparent; a rising edge on LEAB (while EAB remains LOW) freezes A-data into latches. OEAB then determines whether latched data appears on B outputs - this three-signal hierarchy enables precise staging and release of data.
Is the 74ABT543AD,118 RoHS compliant and lead-free?
Yes, the 74ABT543AD,118 is RoHS compliant and lead-free. Its SOT137-1 (SO24) package conforms to EU Directive 2011/65/EU and Nexperia's environmental policy, with lead content below 0.1 wt% and full compliance documented in the manufacturer's material declarations and packaging specifications.
74ABT543AD,118 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- 74ABT
- Package/Case:
- 24-SOIC (0.295", 7.50mm 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:
- 4.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 24-SO
74ABT543AD,118 FAQ
1.How can I place an order for 74ABT543AD,118 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74ABT543AD,118 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 74ABT543AD,118 reliable?
The price and inventory of 74ABT543AD,118 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74ABT543AD,118 is usually 5 days.
3.What payment methods are accepted for 74ABT543AD,118?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74ABT543AD,118 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74ABT543AD,118?
74ABT543AD,118 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74ABT543AD,118 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 74ABT543AD,118?
For technical support, including 74ABT543AD,118 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74ABT543AD,118 requirements.
6.How does Aetrix verify that 74ABT543AD,118 is sourced from the original manufacturer or authorized distributors?
All 74ABT543AD,118 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 74ABT543AD,118 meets industry standards.
7.What is the process for return or replacement of 74ABT543AD,118?
All 74ABT543AD,118 units undergo pre-shipment inspection (PSI). If there is an issue with 74ABT543AD,118, 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 74ABT543AD,118 part is unused and in its original packaging.
Return procedure for 74ABT543AD,118:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
74ABT543AD,118 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…
