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NXP Semiconductors 74LVT543PW,118
- Part No.:
- 74LVT543PW,118
- Manufacturer:
- NXP Semiconductors
- Package:
- 24-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
74LVT543PW,118.pdf
- Description:
- IC TXRX NON-INVERT 3.6V 24TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,353
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Product details
Overview
74LVT543PW,118 from NXP Semiconductors (formerly Philips) is a 3.3V octal latched transceiver with dual enable and 3-state outputs, integrating D-type latch and bus transceiver functions in one 24-pin TSSOP package. It supports bidirectional data flow between two 8-bit buses with independent A→B and B→A control, delivers ±64mA output drive, operates from –40°C to +85°C, and interfaces directly with 5V TTL systems.
For engineers reviewing the 74LVT543PW,118 datasheet, 74LVT543PW,118 pinout, 74LVT543PW,118 application, or 74LVT543PW,118 equivalent, this device serves as a high-drive, latch-enabled bus interface for mixed-voltage backplane and memory subsystem designs requiring simultaneous storage and direction-controlled data transfer.
Technical Context
The 74LVT543PW,118 implements two independent 8-bit D-type latch banks-one for A-to-B and one for B-to-A data paths-each with dedicated Latch Enable (LEAB/LEBA), Enable (EAB/EBA), and Output Enable (OEAB/OEBA) inputs. Its BiCMOS architecture enables 3.3V operation while maintaining TTL-compatible input thresholds and 5V-tolerant I/Os.
It features bus-hold circuitry on all A-side inputs to eliminate external pull-ups, power-up 3-state and reset behavior, and latch-up protection exceeding 500mA per JEDEC Std 17. Propagation delays are specified at 2.3ns (tPLH) and 3.0ns (tPHL) under 3.3V/50pF conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 2.7V to 3.6V - Enables stable operation in modern 3.3V logic domains with margin for rail variation. |
| Output Drive | +64mA sink / –32mA source - Supports heavy capacitive loads and fan-out to multiple TTL inputs without buffers. |
| Propagation Delay | 2.3ns (tPLH), 3.0ns (tPHL) at VCC = 3.3V, CL = 50pF - Ensures sub-4ns timing for high-speed bus handshaking. |
| Input Thresholds | VIL = 0.8V, VIH = 2.0V - Matches standard TTL levels, enabling direct interfacing with legacy 5V controllers. |
| Bus-Hold Current | ±75µA to ±150µA at VCC = 3V - Actively holds unused A-port inputs at valid logic states, removing need for external biasing. |
| ESD Protection | 2000V HBM, 200V MM - Meets industrial handling requirements without additional protection circuitry. |
| Operating Temperature | –40°C to +85°C - Qualified for extended industrial and telecom infrastructure environments. |
Pinout & Package
74LVT543PW,118 is housed in a 24-pin plastic thin shrink small outline package (TSSOP), body width 4.4 mm (SOT355-1), with exposed pad not present and surface-mount compatible footprint.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1, 14 | LEAB / LEBA | Active-Low latch enable for A→B or B→A path - Captures data on rising edge; enables transparent or latched mode. |
| 2, 13 | OEAB / OEBA | Active-Low output enable for A→B or B→A path - Controls 3-state output drivers independently per direction. |
| 11, 23 | EAB / EBA | Active-Low enable for A→B or B→A path - Enables data flow only when low; used with LE for gated transparency. |
| 3–10 | A0–A7 | Port A bidirectional I/Os - 3-state outputs with bus-hold on inputs; connect to local controller or memory bus. |
| 15–22 | B0–B7 | Port B bidirectional I/Os - 3-state outputs; tolerant of 5V signals when outputs disabled; connect to peripheral or expansion bus. |
| 12 | GND | Ground reference - Shared return for all internal logic and I/O circuits; requires low-impedance PCB connection. |
| 24 | VCC | 3.3V supply input - Must be decoupled locally with 100nF ceramic capacitor near pin for noise suppression. |
Key Features
| Feature | Design Value |
|---|---|
| Dual-path latching | Independent A→B and B→A latch banks allow concurrent storage and forwarding of data in both directions without contention. |
| 5V-tolerant I/Os | All A and B port pins tolerate up to 5.5V input voltage with no damage or leakage increase, enabling safe interfacing with 5V peripherals. |
| Power-up 3-State | Outputs remain in high-impedance state during power ramp-up, preventing bus conflicts before system initialization completes. |
| Live insertion/extraction support | Controlled power sequencing and bus-hold inputs permit hot-plug operation in modular backplane systems without glitching. |
| No bus loading at 5V | When outputs are disabled, leakage into a 5V bus is limited to ±100µA - eliminates current injection and signal integrity issues. |
Applications
| Memory Subsystem Interface | Backplane Data Bridge |
|---|---|
|
Use Scenario: Interfacing a 3.3V microcontroller bus to a 5V SRAM or Flash memory array with address/data multiplexing. IC Role / Device Role / Timing Role: Acts as a level-translating, latch-enabled transceiver that captures address/data on one edge and presents it stably to memory during access cycles. Use Value: Eliminates need for separate latches and level shifters; bus-hold prevents floating address lines during idle; ±64mA drive ensures fast memory strobe setup. |
Use Scenario: Connecting two independent 8-bit processor buses across a shared backplane where direction and timing must be controlled per transaction. IC Role / Device Role / Timing Role: Provides isolated, direction-gated data path with independent latch control for each bus segment, supporting burst transfers and arbitration signaling. Use Value: Dual enable logic allows precise handshaking; propagation delay <4ns maintains timing budget in 25MHz+ backplane designs. |
| Industrial I/O Expansion | Legacy System Upgrade Interface |
|
Use Scenario: Adding isolated digital I/O capability to a 3.3V PLC CPU via a 5V-compatible fieldbus module using discrete control lines. IC Role / Device Role / Timing Role: Buffers and latches parallel status/control bits between CPU and field-side logic, with direction switching synchronized to command frames. Use Value: Bus-hold prevents spurious toggling on unterminated I/O lines; live-insertion support enables field-replaceable module design. |
Use Scenario: Migrating an aging 5V ISA-bus system to a 3.3V host controller while retaining legacy peripheral cards. IC Role / Device Role / Timing Role: Serves as a voltage-agnostic bridge that latches and forwards control/status registers bidirectionally without level-shifter latency. Use Value: TTL-compatible thresholds ensure reliable communication with legacy ISA devices; power-up 3-state prevents boot-time bus contention. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal latched transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 74ALVT16543DGGR | 16-bit, dual-supply (3.3V core / 5V I/O), different pinout and register architecture; no bus-hold. | Designed for wider data paths and mixed-voltage SoC interconnect; lacks integrated bus-hold, requiring external biasing. | Select when 16-bit width and dual-supply isolation are required; not drop-in for 74LVT543PW,118's 8-bit, single-supply use case. |
| SN74LVC8T245PW | 8-bit, 3.3V-only I/O (no 5V tolerance), lower drive (±24mA), no bus-hold, different enable logic (single OE). | Targeted at low-power portable systems with matched 3.3V domains; unsuitable for 5V-tolerant or high-drive industrial interfaces. | Choose only for cost-sensitive, low-noise 3.3V-only applications where 5V compatibility and ±64mA drive are unnecessary. |
Compared with 74ALVT16543DGGR and SN74LVC8T245PW, the 74LVT543PW,118 uniquely combines 8-bit dual-path latching, 5V-tolerant I/Os, ±64mA drive, and bus-hold in a compact TSSOP - making it optimal for industrial bus bridging where reliability, mixed-voltage robustness, and minimal external components are critical.
Availability
74LVT543PW,118 is available at Aetrix Electronics and suitable for memory subsystem interfaces, backplane data bridges, industrial I/O expansion modules, and legacy system upgrade interfaces requiring stable component supply and long-term industrial qualification.
Supply support for 74LVT543PW,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
NXP Semiconductors, formerly Philips Semiconductors, is a global leader in high-performance analog and logic ICs, with expertise in automotive, industrial, and communications semiconductor solutions.
The 74LVT543PW,118 belongs to NXP's LVT (Low-Voltage TTL) logic family, designed specifically for high-speed, 3.3V bus interface applications requiring 5V tolerance, latch functionality, and robust ESD/latch-up performance in industrial environments.
FAQ
What is the maximum output sink current supported by the 74LVT543PW,118?
The 74LVT543PW,118 guarantees a minimum output sink current of 64mA per pin under recommended operating conditions (VCC = 3.0V, duty cycle ≤ 50%, f ≥ 1kHz). This high drive strength allows direct interfacing with multiple TTL loads or termination networks without external buffers, and is confirmed in the DC Electrical Characteristics table of the official Philips product specification.
Does the 74LVT543PW,118 support 5V logic inputs while operating at 3.3V supply?
Yes, the 74LVT543PW,118 supports 5V-tolerant inputs: its VI rating extends to +5.5V, and absolute maximum input voltage is +7.0V. This allows safe connection to 5V signal sources without level shifters, as verified in the "RECOMMENDED OPERATING CONDITIONS" and "ABSOLUTE MAXIMUM RATINGS" sections of the datasheet.
How does the bus-hold feature function on the 74LVT543PW,118?
The 74LVT543PW,118 integrates bus-hold circuitry exclusively on the A0–A7 inputs, providing ±75µA to ±150µA overdrive current to maintain valid logic states on unterminated or floating lines. This eliminates the need for external pull-up resistors and is documented in the DC Electrical Characteristics table under parameter IHOLD.
What is the propagation delay of the 74LVT543PW,118 under typical 3.3V operation?
Under typical conditions (VCC = 3.3V ± 0.3V, Tamb = 25°C, CL = 50pF), the 74LVT543PW,118 exhibits tPLH = 2.3ns and tPHL = 3.0ns for An↔Bn paths. These values are specified in the QUICK REFERENCE DATA table and validated across the full industrial temperature range (–40°C to +85°C) in the AC CHARACTERISTICS section.
Is the 74LVT543PW,118 pin-compatible with other packages in the same family?
No - the 74LVT543PW,118 uses the TSSOP-24 package (SOT355-1), which has different mechanical dimensions and thermal characteristics than the SO-24 (SOT137-1) or SSOP-24 (SOT340-1) variants. While electrical functionality is identical across packages, PCB layout and thermal management must be revalidated for the TSSOP footprint.
74LVT543PW,118 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- 74LVT
- Package/Case:
- 24-TSSOP (0.173", 4.40mm 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:
- 2.7V ~ 3.6V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 24-TSSOP
74LVT543PW,118 FAQ
1.How can I place an order for 74LVT543PW,118 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74LVT543PW,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 74LVT543PW,118 reliable?
The price and inventory of 74LVT543PW,118 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74LVT543PW,118 is usually 5 days.
3.What payment methods are accepted for 74LVT543PW,118?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74LVT543PW,118 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74LVT543PW,118?
74LVT543PW,118 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74LVT543PW,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 74LVT543PW,118?
For technical support, including 74LVT543PW,118 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74LVT543PW,118 requirements.
6.How does Aetrix verify that 74LVT543PW,118 is sourced from the original manufacturer or authorized distributors?
All 74LVT543PW,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 74LVT543PW,118 meets industry standards.
7.What is the process for return or replacement of 74LVT543PW,118?
All 74LVT543PW,118 units undergo pre-shipment inspection (PSI). If there is an issue with 74LVT543PW,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 74LVT543PW,118 part is unused and in its original packaging.
Return procedure for 74LVT543PW,118:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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