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NXP Semiconductors 74ABT543AD,112
- Part No.:
- 74ABT543AD,112
- Manufacturer:
- NXP Semiconductors
- Package:
- 24-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
74ABT543AD,112.pdf
- Description:
- IC TXRX NON-INVERT 5.5V 24SO
- Quantity:
- Payment:
- Shipping:
Inventory:1,867
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Product details
Overview
74ABT543AD,112 from Nexperia is an octal registered transceiver with dual-directional latched data flow, combining 74ABT245 and 74ABT373 functionality in a single 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 output drive, and operates from 4.5 V to 5.5 V across −40 °C to +85 °C for bus interface buffering in industrial control backplanes.
For engineers reviewing the 74ABT543AD,112 datasheet, 74ABT543AD,112 pinout, 74ABT543AD,112 application, or 74ABT543AD,112 equivalent, this page delivers verified functional architecture, static/dynamic timing specs, SO24 package mapping, and two validated alternative parts for bidirectional 8-bit latched bus interfacing where live insertion, power-up 3-state, and high sink/source capability are required.
Technical Context
The 74ABT543AD,112 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 enables simultaneous low static current (≤250 µA in disabled state) and high-speed propagation (tPLH/tPHL ≤ 5.2 ns at 5.0 V).
Directional control is fully decoupled: EAB/LEAB/OEAB govern A-side latching and B-output driving, while EBA/LEBA/OEBA manage reverse flow. The device supports transparent mode (all enables LOW), latched+output mode (LE transition with enables active), and high-impedance OFF-state (any OE or E HIGH), with guaranteed 64 mA sink and 32 mA source capability per output.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply voltage | 4.5 V to 5.5 V - ensures compatibility with standard 5 V TTL/CMOS systems and stable operation under rail tolerance. |
| Output drive | 64 mA sink / 32 mA source - supports direct driving of heavy capacitive loads or multiple TTL inputs without external buffers. |
| Propagation delay | ≤5.2 ns (A↔B path) - enables reliable operation in high-speed digital backplanes up to ~100 MHz clock-equivalent rates. |
| Operating temperature | −40 °C to +85 °C - qualified for industrial-grade embedded systems including programmable logic controllers and motor drives. |
| Input leakage | ±100 µA max (−40 °C to +85 °C) - maintains signal integrity in high-impedance bus environments with minimal DC loading. |
| ESD protection | HBM >2000 V, MM >200 V - provides robust handling during board assembly and field service without additional protection circuitry. |
| Power-up state | 3-state outputs - prevents bus contention at power-on, eliminating need for external reset sequencing in hot-swap designs. |
Pinout & Package
74ABT543AD,112 is housed in a plastic small outline package (SO24) with 24 leads and 7.5 mm body width (SOT137-1), optimized for surface-mount assembly and thermal dissipation in dense PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (LEBA) | B-to-A latch enable input | Active-LOW control that captures B-bus data into internal latches on rising edge; enables independent storage before A-bus readout. |
| 2 (OEBA) | B-to-A output enable input | Active-LOW signal enabling/disabling A-side outputs - used with LEBA to isolate or release latched B-data onto A bus. |
| 3–10 (A0–A7) | A-side I/O terminals | Bidirectional data lines for A bus; function as inputs when receiving from B, outputs when driving B (with appropriate enable states). |
| 11 (EAB) | A-to-B enable input | Active-LOW gate controlling transparency/latching of A→B path - must be LOW for LEAB to take effect or for direct pass-through. |
| 12 (GND) | Ground reference | Primary 0 V return 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 control for B-side outputs - determines whether latched or transparent A-data appears on B bus. |
| 14 (LEAB) | A-to-B latch enable input | Active-LOW signal capturing A-bus data into latches on rising edge; decouples A input sampling from B output timing. |
| 15–22 (B0–B7) | B-side I/O terminals | Bidirectional data lines for B bus; serve as inputs when receiving from A, outputs when driving A (under valid enable conditions). |
| 23 (EBA) | B-to-A enable input | Active-LOW gate for B→A path - required LOW for LEBA/OEBA to control B-data flow to A side. |
| 24 (VCC) | Positive supply | +4.5 V to +5.5 V power rail; bypassing with 100 nF ceramic capacitor near pin is mandatory for noise suppression. |
Key Features
| Feature | Design Value |
|---|---|
| Dual-path latched transceivers | Independent A↔B register pairs eliminate timing conflicts in full-duplex bus arbitration and allow asynchronous data staging. |
| Live insertion/extraction support | Power-up 3-state and latch-up immunity (>500 mA) permit safe hot-plug operation in modular backplane systems without system reset. |
| High-current 3-state outputs | 64 mA sink capability enables direct termination of unterminated transmission lines and drives legacy TTL loads without level-shifting. |
| BiCMOS process technology | Combines bipolar speed and CMOS low static power - ICC <250 µA in disabled state yet tPLH <5.2 ns at 5 V. |
| Robust ESD immunity | HBM >2000 V rating reduces field failure risk in manufacturing and end-user environments with minimal handling precautions. |
Applications
| Industrial PLC Backplane Interface | Test Equipment Digital I/O Module |
|---|---|
Use Scenario: Interfacing CPU module to distributed I/O racks via parallel backplane bus with bidirectional configuration and diagnostics data exchange. IC Role / Device Role / Timing Role: Octal latched transceiver providing isolated, glitch-free data transfer between master and slave modules using separate A/B enable and latch controls. Use Value: Enables deterministic read/write cycles with hold-time compliance (th(L) ≥ −0.6 ns) and eliminates bus contention during power-up via inherent 3-state default. | Use Scenario: Bidirectional signal conditioning in automated test equipment (ATE) digital pattern generators and response analyzers. IC Role / Device Role / Timing Role: Latched bus interface managing stimulus delivery (A→B) and response capture (B→A) with independent timing control per direction. Use Value: Supports sub-5 ns propagation delays and live insertion for modular card replacement without halting test sequences. |
| Embedded Controller Expansion Bus | Legacy System Bus Bridge |
Use Scenario: Extending microcontroller GPIOs to external peripherals (ADCs, DACs, displays) using multiplexed address/data buses with handshake protocols. IC Role / Device Role / Timing Role: Registered transceiver acting as timing-isolated buffer between MCU and slower peripherals, absorbing setup/hold violations. Use Value: Provides 3.0 ns minimum set-up time (tsu(H)) and 0.5 ns hold margin, allowing reliable interface to devices with marginal timing margins. | Use Scenario: Bridging ISA or VMEbus segments to modern FPGA-based controllers requiring protocol translation and voltage-level adaptation. IC Role / Device Role / Timing Role: Directionally controlled latched interface preserving data coherency during bus arbitration transitions and clock domain crossings. Use Value: Guarantees 64 mA drive strength to meet legacy bus loading requirements while maintaining 5 V TTL compatibility. |
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 supply range (2.7–3.6 V), 3.3 V only; 32 mA output drive; TSSOP24 package. | Suitable for low-voltage portable or battery-powered systems but incompatible with 5 V buses. | Select when migrating to 3.3 V logic families and board space is constrained - not drop-in for 5 V designs. |
| SN74ABT543N | Same 5 V operation and SO24 package; identical pinout and AC/DC specs per TI datasheet SN74ABT543N. | Direct functional match with identical timing, drive, and enable structure - validated for industrial backplane use. | Preferred for second-source assurance in long-lifecycle industrial programs where Nexperia supply continuity is monitored. |
Compared with 74ABT543AD,112, the 74LVT543PW,118 offers lower power at 3.3 V but sacrifices 5 V compatibility and drive strength, while the SN74ABT543N provides identical electrical behavior and mechanical fit - making it the only true functional and pin-compatible alternative for existing 5 V designs.
Availability
74ABT543AD,112 is available at Aetrix Electronics and suitable for industrial PLC backplane interfaces, test equipment digital I/O modules, embedded controller expansion buses, and legacy system bus bridges requiring stable component supply across extended production lifecycles.
Supply support for 74ABT543AD,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
Nexperia is a global leader in discrete, logic, and PowerMOS semiconductors, serving automotive, industrial, computing, consumer, and wearable markets with high-reliability components.
The 74ABT543AD,112 belongs to Nexperia's ABT-series advanced bi-directional transceiver family, engineered for high-speed, high-drive bus interfacing in industrial control and instrumentation systems where latch isolation and live-insertion robustness are critical.
FAQ
What is the maximum operating frequency supported by the 74ABT543AD,112?
The 74ABT543AD,112 does not specify a maximum clock frequency directly, but its worst-case propagation delay (tPLH/tPHL ≤ 5.2 ns at −40 °C to +85 °C, VCC = 5.0 V ± 0.5 V) supports reliable operation in digital systems with cycle times ≥10 ns - corresponding to effective data rates up to ~100 MHz in synchronous bus applications. Actual usable frequency depends on system-level timing margins, load capacitance, and PCB routing.
Does the 74ABT543AD,112 support hot-swap or live insertion?
Yes, the 74ABT543AD,112 explicitly supports live insertion and extraction per its datasheet features. This is enabled by its power-up 3-state outputs, latch-up protection exceeding 500 mA (JESD78B Class II Level A), and robust ESD immunity (HBM >2000 V). These characteristics prevent bus contention and damage during board insertion into powered backplanes - a key requirement for modular industrial systems.
What are the absolute maximum ratings for VCC and VI on the 74ABT543AD,112?
The 74ABT543AD,112 has an absolute maximum supply voltage (VCC) of −0.5 V to +7.0 V and absolute maximum input voltage (VI) of −1.2 V to +7.0 V, per IEC 60134 limiting values. However, recommended operating conditions restrict VCC to 4.5 V–5.5 V and VI to 0 V–VCC. Exceeding recommended ranges risks parametric degradation or permanent damage, even if within absolute limits.
How does the 74ABT543AD,112 differ from the standard 74ABT245 transceiver?
The 74ABT543AD,112 integrates both transceiver (74ABT245) and latch (74ABT373) functions in one device, offering bidirectional data flow with independent storage per direction. Unlike the 74ABT245 - which provides only transparent pass-through - the 74ABT543AD,112 adds LEAB/LEBA inputs to capture and hold data, enabling asynchronous handshaking, bus arbitration, and timing isolation between A and B sides.
Is the 74ABT543AD,112 pin-compatible with other packages in the same family?
No - the 74ABT543AD,112 uses the SO24 package (SOT137-1), while variants like 74ABT543ADB (SSOP24, SOT340-1) and 74ABT543APW (TSSOP24, SOT355-1) have different footprints, lead pitches, and thermal profiles. Although they share identical logic, pin numbering, and electrical specs, mechanical incompatibility means PCB layout changes are required when substituting packages - no pin-to-pin interchangeability exists across package types.
74ABT543AD,112 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- 74ABT
- 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:
- 4.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 24-SO
74ABT543AD,112 FAQ
1.How can I place an order for 74ABT543AD,112 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74ABT543AD,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 74ABT543AD,112 reliable?
The price and inventory of 74ABT543AD,112 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74ABT543AD,112 is usually 5 days.
3.What payment methods are accepted for 74ABT543AD,112?
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Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74ABT543AD,112?
74ABT543AD,112 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74ABT543AD,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 74ABT543AD,112?
For technical support, including 74ABT543AD,112 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74ABT543AD,112 requirements.
6.How does Aetrix verify that 74ABT543AD,112 is sourced from the original manufacturer or authorized distributors?
All 74ABT543AD,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 74ABT543AD,112 meets industry standards.
7.What is the process for return or replacement of 74ABT543AD,112?
All 74ABT543AD,112 units undergo pre-shipment inspection (PSI). If there is an issue with 74ABT543AD,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 74ABT543AD,112 part is unused and in its original packaging.
Return procedure for 74ABT543AD,112:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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