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NXP Semiconductors 74ABT16543BB,518
- Part No.:
- 74ABT16543BB,518
- Manufacturer:
- NXP Semiconductors
- Package:
- 52-QFP
- Datasheet:
-
74ABT16543BB,518.pdf
- Description:
- IC TXRX NON-INVERT 5.5V 52QFP
- Quantity:
- Payment:
- Shipping:
Inventory:2,117
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Product details
Overview
74ABT16543BB,518 from NXP Semiconductors (formerly Philips) is a 16-bit registered transceiver with dual-directional latched data flow, featuring two independent 8-bit octal transceivers, separate A-to-B and B-to-A latch/enable controls, 64 mA sink output drive, and QFP52 package. It enables bidirectional buffered data transfer in high-speed bus interface applications such as memory expansion and microprocessor system interconnects.
For engineers reviewing the 74ABT16543BB,518 datasheet, 74ABT16543BB,518 pinout, 74ABT16543BB,518 application, or 74ABT16543BB,518 equivalent, this device supports live insertion/extraction, power-up 3-state, and back-to-back latch storage - critical for hot-swap-capable industrial control backplanes and modular computing systems requiring deterministic timing and robust noise immunity.
Technical Context
The 74ABT16543BB,518 implements two independent sets of D-type latches - one per 8-bit channel - with fully decoupled control logic for A↔B directionality. Each channel has dedicated active-low latch enable (nLEAB/nLEBA), output enable (nOEAB/nOEBA), and direction enable (nEAB/nEBA) inputs, enabling transparent, latched, or high-impedance states per side without cross-channel interference.
Its BiCMOS architecture delivers sub-3 ns typical propagation delay (tPLH/tPHL) at 5 V with CL = 50 pF, while multiple VCC/GND pins minimize simultaneous switching noise. The device guarantees ±64 mA output drive capability and exceeds JEDEC Std 78 latch-up protection (>500 mA), supporting reliable operation in electrically noisy industrial environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Function | 16-bit dual-direction latched transceiver with independent A-to-B and B-to-A control paths |
| Supply Voltage | 4.5 V to 5.5 V - compatible with standard 5 V TTL/CMOS logic rails and legacy bus systems |
| Propagation Delay | 2.5 ns (tPLH) / 2.2 ns (tPHL) typical - ensures sub-5 ns worst-case timing margin for 100+ MHz bus operation |
| Output Drive | 64 mA sink / −32 mA source - drives heavy capacitive loads and multiple TTL inputs without external buffers |
| Operating Temperature | −40 °C to +85 °C - qualified for industrial-grade embedded control and automation equipment |
| Package | QFP52 (SOT379-2), 10 × 10 × 2 mm body - surface-mount compatible with automated PCB assembly |
| ESD Protection | MIL-STD-883 >2000 V; Machine Model >200 V - withstands handling and board-level ESD events |
Pinout & Package
74ABT16543BB,518 is housed in a plastic quad flat package (QFP52, SOT379-2) with 52 leads, 10 mm × 10 mm body size, and 0.65 mm lead pitch. The package includes 5 VCC pins (pins 14, 26, 40, 52, and one unlisted internal tie) and 5 GND pins (pins 4, 17, 30, 43, and one unlisted internal tie) to reduce supply noise and improve signal integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1A0–1A7, 2A0–2A7 | A-side data I/O (Group 1 & 2) | Input/output terminals for first and second 8-bit data channels on A bus side |
| 1B0–1B7, 2B0–2B7 | B-side data I/O (Group 1 & 2) | Input/output terminals for first and second 8-bit data channels on B bus side |
| nEAB, nEBA | Direction enable (active LOW) | Enables A→B or B→A path transparency when asserted; disables latching if deasserted |
| nLEAB, nLEBA | Latch enable (active LOW) | Captures A or B data into respective D-latches on rising edge; holds value until next capture |
| nOEAB, nOEBA | Output enable (active LOW) | Controls 3-state output drivers - HIGH disables outputs, LOW enables driven outputs |
Key Features
| Feature | Design Value |
|---|---|
| Dual 8-bit latched transceivers | Enables independent bidirectional data buffering between two 8-bit buses with zero hold-time dependency |
| Live insertion/extraction support | Prevents bus contention during hot-plug operations via power-up 3-state and controlled enable sequencing |
| Back-to-back register architecture | Allows pipelined data staging - e.g., latch incoming data while driving previously captured data to output |
| Multiple VCC/GND pins | Reduces ground bounce and supply droop during simultaneous switching of all 16 outputs |
| Power-up reset behavior | Guarantees all outputs enter high-impedance state at power-on, preventing undefined bus states |
Applications
| Industrial Backplane Interface | Microprocessor Bus Expansion |
|---|---|
Use Scenario: Interfacing a modular PLC CPU module with field I/O carrier boards over a shared 16-bit parallel backplane. IC Role / Device Role / Timing Role: Bidirectional latched transceiver managing data flow between CPU address/data bus and distributed I/O registers. Use Value: Independent A/B latch enables synchronized read/write handshaking without bus turnaround delays; 64 mA drive sustains signal integrity across 20 cm backplane traces. |
Use Scenario: Extending an 8051-based controller's external memory interface to support additional SRAM and peripheral registers. IC Role / Device Role / Timing Role: Registered bus transceiver isolating and buffering multiplexed AD0–AD7 lines between controller and memory subsystem. Use Value: Sub-5 ns propagation delay meets 12 MHz 8051 timing budgets; live-insertion support allows field-replaceable memory modules. |
| Hot-Swappable Communication Module | Legacy System Bus Bridge |
Use Scenario: Enabling hot-swap capability in a CAN-to-parallel bridge card used in railway signaling cabinets. IC Role / Device Role / Timing Role: Latched transceiver buffering CAN controller parallel interface to main system bus, with controlled enable sequencing. Use Value: Power-up 3-state prevents bus glitches during card insertion; latch-enable isolation avoids metastability during partial power-up. |
Use Scenario: Bridging a vintage Z80 CPU bus to modern FPGA-based peripherals in retro-computing restoration projects. IC Role / Device Role / Timing Role: Direction-controlled transceiver translating Z80 RD/WR strobes into synchronized A/B data transfers. Use Value: Dual enable logic matches Z80's asymmetric read/write timing; 5 V tolerance ensures compatibility with original TTL logic families. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar registered transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 74ALVCH16543GR | Lower voltage (1.65–3.6 V), CMOS-only process, 3.3 V only; 24 mA max sink drive | Suitable for low-power 3.3 V systems but lacks 5 V tolerance and 64 mA drive for legacy bus loading | Select when migrating to 3.3 V infrastructure and lower power is prioritized over backward compatibility |
| SN74LVC16543DGGR | 3.3 V operation only; higher input capacitance (5 pF vs. 3 pF); no live-insertion rating | Compatible with modern low-voltage FPGAs but not rated for hot-swap or industrial noise environments | Choose for cost-sensitive consumer electronics where 5 V tolerance and ESD robustness are non-critical |
Compared with 74ABT16543BB,518, the 74ALVCH16543GR offers lower static power but sacrifices 5 V interoperability and drive strength, while the SN74LVC16543DGGR provides smaller footprint and lower cost at the expense of industrial-grade noise immunity and hot-swap reliability.
Availability
74ABT16543BB,518 is available at Aetrix Electronics and suitable for industrial backplane interfaces, microprocessor bus expansion, hot-swappable communication modules, and legacy system bus bridges requiring stable component supply and long-term lifecycle support.
Supply support for 74ABT16543BB,518 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 (originally Philips Semiconductors) designs high-performance logic ICs for industrial, automotive, and communications infrastructure with emphasis on noise immunity, reliability, and legacy compatibility.
The 74ABT16543BB,518 belongs to the ABT-series advanced BiCMOS logic family, engineered specifically for high-speed, high-drive 5 V bus interfacing in electrically demanding environments like factory automation and transportation control systems.
FAQ
What is the maximum clock frequency supported by the 74ABT16543BB,518 for reliable data transfer?
The 74ABT16543BB,518 does not operate on a clock signal - it is an asynchronous registered transceiver. Its timing is governed by setup/hold times and propagation delays. With typical tPLH/tPHL of 2.5/2.2 ns and worst-case 5.6 ns disable time, it supports reliable operation in systems with bus cycle times ≥10 ns - equivalent to sustained 100 MHz burst rates under optimal loading conditions. The 74ABT16543BB,518 achieves this without internal clocking, relying instead on external control signal timing margins.
Does the 74ABT16543BB,518 support true 5 V TTL compatibility on both inputs and outputs?
Yes. The 74ABT16543BB,518 features TTL-compatible input thresholds (VIL ≤ 0.8 V, VIH ≥ 2.0 V) and outputs that swing rail-to-rail within specification at VCC = 4.5–5.5 V. Its VOH reaches 2.9 V at −32 mA and VOL stays ≤0.55 V at 64 mA, meeting standard 5 V TTL voltage levels and drive requirements. This ensures seamless integration with legacy 74LS, 74ALS, and other 5 V logic families - a core design goal of the ABT series reflected in the 74ABT16543BB,518's electrical specifications.
How many power and ground pins does the 74ABT16543BB,518 QFP52 package include?
The 74ABT16543BB,518 in QFP52 (SOT379-2) package includes five dedicated VCC pins (pins 14, 26, 40, 52, and one internal tie) and five dedicated GND pins (pins 4, 17, 30, 43, and one internal tie). This multi-pin supply distribution minimizes simultaneous switching noise and improves power integrity - a key feature explicitly cited in the 74ABT16543BB,518 datasheet to support clean 16-bit parallel bus operation.
Can the 74ABT16543BB,518 be used for unidirectional data transfer, or is bidirectional operation mandatory?
The 74ABT16543BB,518 supports fully independent unidirectional operation on either A-to-B or B-to-A paths. By asserting only nEAB/nLEAB/nOEAB (or only nEBA/nLEBA/nOEBA), the unused side remains in high-impedance state. Its dual-control architecture allows use as two separate 8-bit latched buffers - for example, using Group 1 for A→B memory writes and Group 2 for B→A status reads. This flexibility is inherent to the 74ABT16543BB,518's functional design and confirmed in its function table.
What is the latch-up immunity rating for the 74ABT16543BB,518, and how is it verified?
The 74ABT16543BB,518 exceeds 500 mA latch-up immunity per JEDEC Standard 78, verified through standardized stress testing per the specification. This rating ensures robustness against transient current surges caused by supply glitches or ESD-induced parasitic thyristor activation. The 74ABT16543BB,518's BiCMOS process and layout techniques achieve this performance level - a critical requirement for industrial applications where power rail instability is common and must not trigger destructive latch-up events.
74ABT16543BB,518 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- 74ABT
- Package/Case:
- 52-QFP
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Logic Type:
- Transceiver, Non-Inverting
- Number of Elements:
- 2
- 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:
- 52-QFP (10x10)
74ABT16543BB,518 FAQ
1.How can I place an order for 74ABT16543BB,518 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74ABT16543BB,518 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 74ABT16543BB,518 reliable?
The price and inventory of 74ABT16543BB,518 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74ABT16543BB,518 is usually 5 days.
3.What payment methods are accepted for 74ABT16543BB,518?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74ABT16543BB,518 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74ABT16543BB,518?
74ABT16543BB,518 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74ABT16543BB,518 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 74ABT16543BB,518?
For technical support, including 74ABT16543BB,518 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74ABT16543BB,518 requirements.
6.How does Aetrix verify that 74ABT16543BB,518 is sourced from the original manufacturer or authorized distributors?
All 74ABT16543BB,518 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 74ABT16543BB,518 meets industry standards.
7.What is the process for return or replacement of 74ABT16543BB,518?
All 74ABT16543BB,518 units undergo pre-shipment inspection (PSI). If there is an issue with 74ABT16543BB,518, 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 74ABT16543BB,518 part is unused and in its original packaging.
Return procedure for 74ABT16543BB,518:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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