Texas Instruments 74LVTH16245ADLRG4

Overview

74LVTH16245ADLRG4 from Texas Instruments is a 3.3-V ABT 16-bit dual-octal noninverting bus transceiver with 3-state outputs, designed for asynchronous bidirectional data transfer between 3.3-V and 5-V systems. It features bus-hold circuitry, Ioff support for hot insertion, distributed VCC/GND pins, and operates down to 2.7 V supply. Used in mixed-voltage backplane interfaces and memory expansion subsystems.

For engineers reviewing the 74LVTH16245ADLRG4 datasheet, 74LVTH16245ADLRG4 pinout, 74LVTH16245ADLRG4 application, or 74LVTH16245ADLRG4 equivalent, key selection criteria include 3.3-V operation with 5-V tolerant I/O, 48-pin SSOP (DL) package compatibility, propagation delay ≤3.7 ns at 3.3 V, and bus-hold functionality eliminating external bias resistors.

Technical Context

The 74LVTH16245ADLRG4 implements advanced BiCMOS technology (ABT) for low static power and high-speed switching. Its dual-octal architecture supports independent direction control per 8-bit section via DIR inputs and output enable via OE, enabling flexible A↔B or B↔A data flow under asynchronous timing.

It integrates power-up 3-state and Ioff circuitry to prevent current backflow during hot insertion, while distributed VCC/GND pins and flow-through pinout minimize ground bounce (<0.8 V typical VOLP) and optimize PCB layout for signal integrity in high-density interconnects.

Key Specifications

Pinout & Package

74LVTH16245ADLRG4 is packaged in a 48-pin SSOP (DL) with 0.5-mm pitch, 12.4 mm × 6.2 mm body size, and 1.2 mm max height per JEDEC MO-153. Pin 1 identifier located at top-left corner with notch marking.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar bus transceiver applications.

Compared with SN74LVTH16245ADGGRG4, the 74LVTH16245ADLRG4 offers identical signal integrity and voltage translation but trades compactness for easier manual handling and higher thermal mass in SSOP. Against SN74LVC16245APAG, the 74LVTH16245ADLRG4 provides essential 5-V tolerance and bus-hold-critical for legacy integration and reduced BOM complexity.

Availability

74LVTH16245ADLRG4 is available at Aetrix Electronics and suitable for memory expansion interfaces, backplane data bridges, industrial PLC I/O modules, and test equipment bus adapters requiring stable component supply across extended product lifecycles.

Supply support for 74LVTH16245ADLRG4 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 over 50 years of innovation in high-reliability interface ICs.

The 74LVTH16245ADLRG4 belongs to TI's Widebus™ family of ABT transceivers, engineered specifically for robust mixed-voltage communication in industrial, telecom, and computing infrastructure.

FAQ

What voltage levels does the 74LVTH16245ADLRG4 support on its I/O ports?

The 74LVTH16245ADLRG4 supports 5-V input and output voltage levels while operating from a 3.3-V VCC supply. Its I/O pins tolerate up to 5.5 V, enabling seamless interfacing between 3.3-V logic and legacy 5-V systems without external level-shifting components. This mixed-mode capability is explicitly specified in the Recommended Operating Conditions table of the official datasheet.

Does the 74LVTH16245ADLRG4 require external pullup or pulldown resistors on unused inputs?

No, the 74LVTH16245ADLRG4 includes active bus-hold circuitry on all A and B port inputs, which maintains unused or undriven inputs at valid logic states. TI explicitly states that use of external pullup or pulldown resistors with this device is not recommended, as it may interfere with bus-hold operation and increase power consumption unnecessarily.

Can the 74LVTH16245ADLRG4 be used in hot-insertion applications?

Yes, the 74LVTH16245ADLRG4 is fully specified for hot-insertion applications. It incorporates Ioff circuitry that disables outputs and prevents damaging current backflow when powered down, and power-up 3-state logic that holds outputs in high-impedance during power ramp-up/down. These features are validated per TI's ABT design methodology and referenced in the device description section.

What is the maximum propagation delay for the 74LVTH16245ADLRG4 at 3.3 V?

The maximum propagation delay (tPLH/tPHL) for the 74LVTH16245ADLRG4 is 3.7 ns at VCC = 3.3 V, CL = 50 pF, and TA = 25°C, as specified in the Switching Characteristics table. This value applies to both A→B and B→A data paths and ensures timing compliance in high-speed parallel bus implementations up to approximately 135 MHz.

Which package type is used by the 74LVTH16245ADLRG4, and what are its mechanical dimensions?

The 74LVTH16245ADLRG4 uses the SSOP-48 (DL) package: 12.4 mm × 6.2 mm body size, 1.2 mm maximum height, 0.5 mm lead pitch, and JEDEC MO-153 compliant. Mechanical drawings confirm pin 1 location at top-left with notch marking, and thermal impedance θJA = 63°C/W per datasheet Package Thermal Impedance table.