My Inquiry
My Account
Texas Instruments SN74LVT16543DLR
- Part No.:
- SN74LVT16543DLR
- Manufacturer:
- Texas Instruments
- Package:
- 56-BSSOP (0.295", 7.50mm Width)
- Datasheet:
-
SN74LVT16543DLR.pdf
- Description:
- IC TXRX NON-INVERT 3.6V 56SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,361
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SN74LVT16543DLR from Texas Instruments is a 16-bit registered transceiver IC designed for 3.3-V VCC operation with 5-V tolerant inputs/outputs, supporting mixed-mode signal interfacing between 3.3-V and 5-V systems. It features dual 8-bit bidirectional data paths, independent latch-enable (LEAB/LEBA) and output-enable (OEAB/OEBA) controls per direction, and bus-hold circuitry eliminating external pullups. It is used in high-speed backplane and motherboard interface bridging where voltage-level translation and registered data flow are required.
For engineers reviewing the SN74LVT16543DLR datasheet, SN74LVT16543DLR pinout, SN74LVT16543DLR application, or SN74LVT16543DLR equivalent, key selection criteria include its 3.3-V supply with 5-V I/O tolerance, 56-pin SSOP (DL) package, ±64-mA output drive, bus-hold input retention, and support for live insertion in hot-swap systems.
Technical Context
The SN74LVT16543DLR implements two independent 8-bit registered transceiver channels using Advanced BiCMOS Technology (ABT), enabling simultaneous A-to-B and B-to-A data flow with separate control logic. Each channel includes dedicated CE, LE, and OE inputs, allowing asynchronous latching and 3-state output control without inter-channel dependency.
Its bus-hold circuitry actively maintains valid logic levels on unused inputs at 3 V, while distributed VCC/GND pins and flow-through pin architecture minimize switching noise and optimize PCB routing. The device operates across −40°C to 85°C and supports unregulated battery operation down to 2.7 V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 2.7 V to 3.6 V - enables direct connection to 3.3-V rails and tolerance for battery droop in portable systems |
| I/O Voltage Tolerance | Up to 5.5 V - allows safe interfacing with legacy 5-V TTL logic without level-shifting components |
| Output Drive | ±64 mA (IOL/IOH) - sufficient to drive heavy capacitive loads or multiple TTL inputs in backplane applications |
| Propagation Delay | 1.4–5.5 ns (tPLH/tPHL) - supports >100-MHz data throughput in registered mode under typical conditions |
| Bus-Hold Current | ±75 µA at 3 V - actively holds floating inputs at valid logic thresholds, removing need for external bias resistors |
| Power Dissipation | 1.4 W (DL package, still air) - thermally manageable in dense board layouts with standard airflow |
| ESD Rating | >2000 V HBM - meets MIL-STD-883C for robustness in handling and assembly environments |
Pinout & Package
SN74LVT16543DLR is housed in a 56-pin Shrink Small-Outline Package (SSOP-DL), 300-mil body width, 0.5-mm pitch, with 1.2-mm max height and Q1 pin-1 orientation in tape.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1OEAB, 2OEAB, 1OEBA, 2OEBA | Output Enable (active-low) | Controls 3-state output drivers independently per 8-bit channel; must be low for B or A outputs to drive |
| 1LEAB, 2LEAB, 1LEBA, 2LEBA | Latch Enable (active-low) | Places corresponding A or B latches into transparent mode when low; rising edge captures data |
| 1CEAB, 2CEAB, 1CEBA, 2CEBA | Chip Enable (active-low) | Must be low to enable data capture or output; gates both latch and output functions per channel |
| 1A1–1A8, 2A1–2A8 | Input/Output Port A (Channel 1 & 2) | 8-bit bidirectional data terminals for first and second A-side interfaces; support 5-V tolerant signaling |
| 1B1–1B8, 2B1–2B8 | Input/Output Port B (Channel 1 & 2) | 8-bit bidirectional data terminals for first and second B-side interfaces; electrically identical to A ports |
| VCC, GND | Power and Ground | Distributed across package (12 total pins) - reduces simultaneous switching noise and improves power integrity |
Key Features
| Feature | Design Value |
|---|---|
| Mixed-mode 3.3-V/5-V I/O | Enables seamless integration between modern low-voltage logic and legacy 5-V subsystems without external translators |
| Independent Channel Control | Each 8-bit path has dedicated CE/LE/OE - permits asymmetric data flow (e.g., A→B active while B→A disabled) |
| Bus-Hold Inputs | Eliminates need for 10-kΩ external pullup/pulldown resistors on unused data lines, reducing BOM count and layout area |
| Live Insertion Support | With proper power sequencing (OE tied to VCC via pullup), allows safe hot-plug operation in modular backplanes |
| Flow-Through Pinout | A/B signals enter and exit opposite sides of package - simplifies layer routing and minimizes trace crossovers on 4+ layer PCBs |
Applications
| Server Backplane Interface | Industrial PLC I/O Module |
|---|---|
|
Use Scenario: Bridging 3.3-V FPGA control logic to 5-V sensor/actuator buses in rack-mounted automation controllers. IC Role / Device Role / Timing Role: Registered transceiver providing synchronized, noise-immune data transfer with independent direction control per 8-bit lane. Use Value: Eliminates discrete level shifters and glue logic; bus-hold prevents spurious resets during module hot-swap events. |
Use Scenario: Interfacing 3.3-V microcontroller peripherals to legacy 5-V digital I/O cards in programmable logic controllers. IC Role / Device Role / Timing Role: Bidirectional registered buffer with latch timing control to meet deterministic scan-cycle deadlines. Use Value: Ensures setup/hold compliance for 5-V inputs while maintaining 3.3-V core power efficiency and thermal profile. |
| Telecom Line Card | Test Equipment Digital Pattern Generator |
|
Use Scenario: Data path conditioning between 3.3-V ASICs and 5-V line interface units (LIUs) in carrier-grade access equipment. IC Role / Device Role / Timing Role: Registered transceiver with distributed power pins minimizing jitter induced by high-speed switching noise. Use Value: Meets ETSI/GR-1089 immunity requirements via low ground bounce (<0.8 V) and robust ESD protection. |
Use Scenario: Generating precise, registered stimulus patterns for DUT testing where voltage-level compatibility with legacy devices is mandatory. IC Role / Device Role / Timing Role: Synchronized 16-bit pattern driver with independent OE/LE per byte to construct multi-phase test vectors. Use Value: Enables glitch-free vector transitions and eliminates race conditions during pattern updates via controlled latch strobes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar registered transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVTH16543DGGR | Lower drive (±32 mA), LVTH family - uses lower-power LVT logic with reduced speed (tPD up to 7.7 ns) | Better suited for low-power, lower-frequency industrial control where 64-mA drive is unnecessary | Choose if system load capacitance ≤30 pF and max frequency <80 MHz; saves ~40% ICC in standby |
| 74ALVC164245DGGR | Non-registered, dual-supply (VCCA/VCCB), no bus-hold - requires external pullups and lacks latch synchronization | Applicable only where asynchronous translation suffices and timing-critical registration is not needed | Select when deterministic latency is not required and board space allows external biasing; avoids register propagation delay |
Compared with SN74LVTH16543DGGR and 74ALVC164245DGGR, the SN74LVT16543DLR uniquely combines 64-mA drive, integrated bus-hold, and full registration per channel - making it optimal for high-reliability, hot-swap-capable 16-bit bridging where signal integrity and timing control are critical.
Availability
SN74LVT16543DLR is available at Aetrix Electronics and suitable for server backplane design, industrial PLC I/O modules, and telecom line card development requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for SN74LVT16543DLR 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
Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and logic solutions, with decades of expertise in high-speed interface ICs and industrial-grade reliability.
The SN74LVT16543DLR belongs to TI's Widebus™ family of advanced BiCMOS transceivers, engineered specifically for mixed-voltage system bridging in computing, communications, and automation infrastructure.
FAQ
What is the maximum operating temperature range for the SN74LVT16543DLR?
The SN74LVT16543DLR is characterized for operation from −40°C to +85°C ambient temperature. This industrial-grade rating ensures reliable performance in demanding environments such as base station equipment, factory-floor controllers, and network edge devices where thermal management is constrained. The DL package's thermal resistance supports this range under specified power dissipation limits.
Does the SN74LVT16543DLR require external pullup resistors on its data inputs?
No, the SN74LVT16543DLR includes active bus-hold circuitry on all A and B port inputs, which maintains unused or floating inputs at valid logic thresholds without external components. This feature eliminates the need for 10-kΩ pullup/pulldown resistors, reducing BOM cost and PCB real estate - a key advantage over non-bus-hold transceivers like the 74ALVC164245.
Can the SN74LVT16543DLR interface directly with 5-V logic while powered at 3.3 V?
Yes, the SN74LVT16543DLR supports mixed-mode operation: its inputs tolerate up to 5.5 V regardless of VCC (2.7–3.6 V), and its outputs drive to valid TTL levels when loaded. This allows direct connection to 5-V CMOS/TTL devices without level translators - confirmed by VIH/VIL specs (2.0 V/0.8 V) and absolute max ratings (VI = 7 V).
What is the recommended power-up sequence for reliable operation of the SN74LVT16543DLR?
To ensure high-impedance outputs during power-up, TI recommends tying all OE inputs to VCC through a pullup resistor (value determined by driver sink capability). For the SN74LVT16543DLR, a 4.7-kΩ resistor is typical. This prevents bus contention before firmware initializes control signals - a requirement explicitly stated in the datasheet's "power up/down" guidance.
Is the SN74LVT16543DLR pin-compatible with other members of the LVT16543 family?
Yes, the SN74LVT16543DLR shares identical pinout and functionality with other DL- and DGG-packaged variants (e.g., SN74LVT16543DL, SN74LVT16543DGGR), differing only in packaging and reel/tube configuration. All share the same 56-pin SSOP footprint, electrical behavior, and timing characteristics - enabling drop-in replacement across assembly formats without layout changes.
SN74LVT16543DLR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74LVT
- Package/Case:
- 56-BSSOP (0.295", 7.50mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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:
- 2.7V ~ 3.6V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 56-SSOP
SN74LVT16543DLR FAQ
1.How can I place an order for SN74LVT16543DLR through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74LVT16543DLR 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 SN74LVT16543DLR reliable?
The price and inventory of SN74LVT16543DLR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74LVT16543DLR is usually 5 days.
3.What payment methods are accepted for SN74LVT16543DLR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74LVT16543DLR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74LVT16543DLR?
SN74LVT16543DLR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74LVT16543DLR 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 SN74LVT16543DLR?
For technical support, including SN74LVT16543DLR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74LVT16543DLR requirements.
6.How does Aetrix verify that SN74LVT16543DLR is sourced from the original manufacturer or authorized distributors?
All SN74LVT16543DLR 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 SN74LVT16543DLR meets industry standards.
7.What is the process for return or replacement of SN74LVT16543DLR?
All SN74LVT16543DLR units undergo pre-shipment inspection (PSI). If there is an issue with SN74LVT16543DLR, 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 SN74LVT16543DLR part is unused and in its original packaging.
Return procedure for SN74LVT16543DLR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SN74LVT16543DLR 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…
