My Inquiry
My Account
Texas Instruments SN74LVCH16543ADL
- Part No.:
- SN74LVCH16543ADL
- Manufacturer:
- Texas Instruments
- Package:
- 56-BSSOP (0.295", 7.50mm Width)
- Datasheet:
-
SN74LVCH16543ADL.pdf
- Description:
- IC TXRX NON-INVERT 3.6V 56SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,031
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SN74LVCH16543ADL from Texas Instruments is a 16-bit registered transceiver with 3-state outputs, designed for bidirectional data flow between two 8-bit buses or as a single 16-bit bus interface. It operates from 1.65 V to 3.6 V, supports 5.5-V-tolerant inputs, delivers 5.4 ns max propagation delay at 3.3 V, and features Ioff partial-power-down protection and bus-hold on all data inputs - enabling robust operation in mixed-voltage 3.3-V/5-V systems such as industrial backplanes and FPGA I/O expansion.
For engineers reviewing the SN74LVCH16543ADL datasheet, SN74LVCH16543ADL pinout, SN74LVCH16543ADL application, or SN74LVCH16543ADL equivalent, key selection considerations include its dual 8-bit register control (LEAB/LEBA, OEAB/OEBA), 56-pin SSOP (DL) package with verified pin mapping, 3.3-V optimized timing, and compatibility with legacy 5-V logic interfaces without level shifters.
Technical Context
The SN74LVCH16543ADL implements two independent 8-bit registered transceiver sections (A↔B), each with dedicated latch-enable (LEAB/LEBA), output-enable (OEAB/OEBA), and chip-enable (CEAB/CEBA) controls. Its dual-register architecture enables simultaneous latching and 3-state control per direction, supporting transparent or storage-mode operation based on LE transitions.
It integrates bus-hold circuitry on all A and B port inputs (eliminating external pull resistors), Ioff protection to prevent backflow during partial power-down, and 5.5-V-tolerant inputs that allow direct interfacing with 5-V drivers while powered from 1.65–3.6 V - making it suitable for voltage translation in heterogeneous digital subsystems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 1.65 V to 3.6 V - Enables use in low-voltage embedded systems and compatibility with modern 3.3-V/2.5-V/1.8-V supply rails. |
| Input Voltage Tolerance | Up to 5.5 V - Allows direct connection to 5-V logic without external level-shifting components. |
| Max tpd @ 3.3 V | 5.4 ns - Supports high-speed data transfer in real-time bus interfaces and FPGA-to-ASIC bridging. |
| Ioff Support | Yes - Disables outputs during power-down to prevent damaging current backflow in hot-swap or partial-power-down systems. |
| Bus-Hold Inputs | Integrated on all A/B ports - Eliminates need for external pullup/pulldown resistors on unused or floating data lines. |
| Output Drive @ 3 V | ±24 mA - Sufficient to drive multiple CMOS loads or moderate trace capacitance in board-level interconnects. |
| ESD Protection | HBM: 2000 V, MM: 200 V, CDM: 1000 V - Meets industrial-grade ESD robustness requirements per JESD22. |
Pinout & Package
SN74LVCH16543ADL uses a 56-pin Shrink Small Outline Package (SSOP), DL variant, with 0.5-mm lead pitch, 13.9 mm × 7.5 mm body size, and 1.2-mm max height. Pin numbering follows standard DL top-view orientation with Pin 1 marked by a corner chamfer or dot.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1OEAB, 2OEAB | A-to-B Output Enable (active-low) | Controls 3-state output drivers for A→B data path; both must be low for active B outputs. |
| 1LEAB, 2LEAB | A-to-B Latch Enable (active-low) | When low, A inputs pass through transparently; rising edge latches data into A-side registers. |
| 1CEAB, 2CEAB | A-to-B Chip Enable (active-low) | Must be low to enable A input sampling or B output driving; disables latching and output when high. |
| 1A1–1A8, 2A1–2A8 | A-side Data Inputs (Port A) | Eight-bit parallel inputs for first and second 8-bit A bus segments; 5.5-V tolerant. |
| 1B1–1B8, 2B1–2B8 | B-side Data Outputs/Inputs (Port B) | Eight-bit parallel bidirectional I/Os for B bus; 3-state controlled by OEAB/OEBA. |
| VCC, GND | Power and Ground | Multiple distributed VCC (Pins 7, 22, 37, 46) and GND (Pins 4, 11, 18, 25, 32, 39, 44, 51) pins reduce switching noise and improve signal integrity. |
Key Features
| Feature | Design Value |
|---|---|
| Mixed-mode signal operation | 5-V input tolerance with 3.3-V VCC enables seamless integration between legacy 5-V peripherals and modern low-voltage controllers. |
| Dual independent 8-bit control | Separate LEAB/OEAB/CEAB and LEBA/OEBA/CEBA inputs allow asymmetric data flow management - e.g., latching A→B while holding B→A in high-Z. |
| Bus-hold on all data inputs | Prevents floating inputs from drifting to indeterminate logic states, reducing susceptibility to noise and eliminating external biasing components. |
| Ioff partial-power-down support | Automatically disables outputs when VCC = 0 V, preventing current backflow in systems with staggered power sequencing or hot-plug capability. |
| Low ground bounce (VOLP < 0.8 V) | Minimizes simultaneous switching noise during high-speed output transitions, improving signal integrity in dense PCB layouts. |
Applications
| Industrial Backplane Interface | FPGA I/O Expansion |
|---|---|
Use Scenario: Interfacing a 3.3-V FPGA I/O bank to a legacy 5-V peripheral bus in programmable logic controller (PLC) modules. IC Role / Device Role / Timing Role: Bidirectional registered transceiver providing voltage translation, data latching, and 3-state isolation between FPGA and backplane. Use Value: Eliminates discrete level shifters and pull resistors while maintaining sub-6-ns timing compliance for deterministic I/O handshaking. |
Use Scenario: Extending limited FPGA GPIO count via parallel 16-bit I/O expansion for sensor array readout in test equipment. IC Role / Device Role / Timing Role: Registered buffer with independent A/B control enabling synchronized capture of 16-bit parallel sensor data and controlled output to display drivers. Use Value: Reduces FPGA resource usage by offloading input registration and provides glitch-free output enable sequencing across all 16 bits. |
| Memory-Mapped Peripheral Bridge | Mixed-Voltage System Debug Interface |
Use Scenario: Connecting a 3.3-V microcontroller's memory-mapped address/data bus to 5-V EEPROM or flash memory in embedded instrumentation. IC Role / Device Role / Timing Role: Registered transceiver acting as timing-compliant bus bridge with CE-controlled access and OE-gated output enable. Use Value: Ensures setup/hold timing margins are met across voltage domains while supporting burst-mode memory reads/writes. |
Use Scenario: Providing a debug-accessible 16-bit parallel port between a 1.8-V SoC and external 5-V logic analyzer or protocol sniffer. IC Role / Device Role / Timing Role: Voltage-tolerant transceiver with bus-hold and Ioff, enabling safe connection/disconnection during live system debugging. Use Value: Prevents bus contention and latch-up during probe attachment; maintains stable logic levels even with unpowered debug tools. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar registered transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC16245ADGGR | Non-registered 16-bit transceiver; no latch functionality; identical VCC range and 5.5-V input tolerance. | Suitable only where data flow is purely combinational; lacks storage capability for synchronous bus capture. | Select when timing-critical transparent buffering suffices and register staging is unnecessary. |
| SN74LVTH162245DLR | Higher drive strength (±32 mA), TTL-compatible inputs, but no 5.5-V tolerance or bus-hold; requires external biasing. | Better for high-capacitance loads or legacy TTL systems; incompatible with floating 5-V inputs without external circuitry. | Choose for legacy 5-V bus environments where higher current drive outweighs voltage translation needs. |
Compared with SN74LVCH16543ADL, SN74LVC16245ADGGR offers simpler timing but no latching, while SN74LVTH162245DLR delivers stronger drive yet sacrifices 5-V tolerance and integrated bus-hold - making SN74LVCH16543ADL uniquely suited for mixed-voltage, register-staged, low-component-count designs.
Availability
SN74LVCH16543ADL is available at Aetrix Electronics and suitable for industrial backplane interfaces, FPGA I/O expansion, memory-mapped peripheral bridging, and mixed-voltage system debug interfaces requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for SN74LVCH16543ADL 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-reliability interface ICs and widebus technology.
The SN74LVCH16543ADL belongs to TI's Widebus™ family of advanced logic devices, engineered specifically for high-speed, mixed-voltage bus interfacing in industrial, communications, and computing infrastructure.
FAQ
What is the operating voltage range for the SN74LVCH16543ADL?
The SN74LVCH16543ADL operates from 1.65 V to 3.6 V on VCC. Its inputs tolerate up to 5.5 V regardless of VCC level, enabling interoperability with 5-V logic families while powered from lower-voltage supplies. This specification is validated across the full –40°C to +85°C temperature range and confirmed in TI's SCAS317M datasheet under Recommended Operating Conditions.
Does the SN74LVCH16543ADL support partial power-down operation?
Yes, the SN74LVCH16543ADL includes Ioff circuitry that disables all outputs when VCC = 0 V, preventing damaging current backflow in systems with staggered power sequencing or hot-swap capability. This feature is explicitly documented in the Features and Electrical Characteristics sections of the official datasheet and tested per JESD78.
How many independent control sets does the SN74LVCH16543ADL provide?
The SN74LVCH16543ADL provides two fully independent 8-bit control sets: one for A-to-B direction (1CEAB/1LEAB/1OEAB and 2CEAB/2LEAB/2OEAB) and another for B-to-A direction (1CEBA/1LEBA/1OEBA and 2CEBA/2LEBA/2OEBA). Each set allows separate latch-enable and output-enable timing, enabling asymmetric bidirectional data flow control.
Is bus-hold functionality enabled by default on the SN74LVCH16543ADL?
Yes, bus-hold circuitry is integrated and always active on all A and B port data inputs of the SN74LVCH16543ADL - it cannot be disabled via control pins and functions independently of OE or DIR states. This eliminates the need for external pullup/pulldown resistors on unused or floating inputs, as confirmed in the Functional Description and Terminal Assignments sections of the datasheet.
What package type is used for the SN74LVCH16543ADL?
The SN74LVCH16543ADL uses a 56-pin Shrink Small Outline Package (SSOP) with DL suffix, measuring 13.9 mm × 7.5 mm with 0.5-mm lead pitch and 1.2-mm maximum height. This package is distinct from the TSSOP (DGG) and TVSOP (DGV) variants and is specified in TI's PACKAGE OPTION ADDENDUM with MSL Level-1 rating and NIPDAU lead finish.
SN74LVCH16543ADL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74LVCH
- Package/Case:
- 56-BSSOP (0.295", 7.50mm Width)
- Packaging:
- Bulk
- 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:
- 24mA, 24mA
- Voltage - Supply:
- 1.65V ~ 3.6V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 56-SSOP
SN74LVCH16543ADL FAQ
1.How can I place an order for SN74LVCH16543ADL through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74LVCH16543ADL 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 SN74LVCH16543ADL reliable?
The price and inventory of SN74LVCH16543ADL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74LVCH16543ADL is usually 5 days.
3.What payment methods are accepted for SN74LVCH16543ADL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74LVCH16543ADL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74LVCH16543ADL?
SN74LVCH16543ADL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74LVCH16543ADL 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 SN74LVCH16543ADL?
For technical support, including SN74LVCH16543ADL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74LVCH16543ADL requirements.
6.How does Aetrix verify that SN74LVCH16543ADL is sourced from the original manufacturer or authorized distributors?
All SN74LVCH16543ADL 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 SN74LVCH16543ADL meets industry standards.
7.What is the process for return or replacement of SN74LVCH16543ADL?
All SN74LVCH16543ADL units undergo pre-shipment inspection (PSI). If there is an issue with SN74LVCH16543ADL, 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 SN74LVCH16543ADL part is unused and in its original packaging.
Return procedure for SN74LVCH16543ADL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SN74LVCH16543ADL 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…
