Texas Instruments SN74LVTH16240DGGR

Overview

SN74LVTH16240DGGR from Texas Instruments is a 3.3-V ABT 16-bit inverting buffer/driver with 3-state outputs, designed for memory address and clock bus driving in mixed-voltage systems. It supports 5-V input compatibility with 3.3-V V_CC, delivers ±64 mA output drive at V_CC = 3.3 V, and features bus-hold circuitry to eliminate external pullup/pulldown resistors. Used in high-density backplane and motherboard data-path interfaces.

For engineers reviewing the SN74LVTH16240DGGR datasheet, SN74LVTH16240DGGR pinout, SN74LVTH16240DGGR application, or SN74LVTH16240DGGR equivalent, key selection criteria include 3-state enable timing (t_PZL ≤ 4.6 ns), I_off support for hot insertion, distributed V_CC/GND pinning for noise reduction, and guaranteed operation down to 2.7 V supply.

Technical Context

This device implements four independent 4-bit inverting buffers, each with symmetrical active-low output-enable (OE) control. Its Advanced BiCMOS Technology (ABT) enables TTL-level interface compatibility while operating from a 3.3-V supply, with input tolerance up to 5.5 V and output drive capability of 64 mA low-level sink current.

The architecture includes power-up 3-state and I_off circuitry to prevent backflow during hot insertion, plus integrated bus-hold on all data inputs (I_I(hold) ≥ ±75 µA). Distributed V_CC and GND pins across the 48-pin TSSOP package minimize simultaneous switching noise in high-speed bus applications.

Key Specifications

Pinout & Package

TSSOP-48 (DGG) package: 12.6 mm × 6.2 mm × 1.2 mm body, 0.5 mm pitch, lead-free NiPdAu finish, MSL Level-1.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 16-bit 3-state buffer applications.

Compared with SN74LVC16244ADGGR and SN74ALVCH16244VR, the SN74LVTH16240DGGR uniquely provides inverting logic, 5-V input tolerance, and integrated bus-hold-making it the only option among the three qualified for legacy 5-V bus interfacing without external components.

Availability

SN74LVTH16240DGGR is available at Aetrix Electronics and suitable for memory subsystems, backplane interconnects, and hot-swappable module interfaces requiring stable component supply across industrial temperature ranges (–40°C to 85°C).

Supply support for SN74LVTH16240DGGR 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 SN74LVTH16240 belongs to TI's Widebus™ family of ABT logic devices, engineered specifically to increase density and performance of 3-state memory address drivers, clock drivers, and bus-oriented transceivers in mixed-voltage computing infrastructure.

FAQ

What is the maximum operating voltage for SN74LVTH16240DGGR inputs?

The SN74LVTH16240DGGR supports input voltages up to 5.5 V regardless of V_CC level, enabling direct interfacing with 5-V TTL logic while powered from a 3.3-V supply. This 5-V tolerance is specified across the full operating temperature range and does not require external clamping circuitry.

Does SN74LVTH16240DGGR require external pullup resistors on its inputs?

No, SN74LVTH16240DGGR includes active bus-hold circuitry on all data inputs, maintaining valid logic states on unused or floating pins without external components. The bus-hold current (±75 µA minimum) exceeds standard leakage, eliminating need for pullup/pulldown resistors in most PCB layouts.

Can SN74LVTH16240DGGR be used in hot-swap applications?

Yes, SN74LVTH16240DGGR is explicitly characterized for hot-insertion use via integrated I_off and power-up 3-state circuitry. When V_CC is 0 V, I_off limits current to ±100 µA; during power-up/power-down, outputs remain in high-impedance state to prevent bus conflicts.

What is the output drive capability of SN74LVTH16240DGGR at 3.3 V?

At V_CC = 3.3 V, SN74LVTH16240DGGR delivers 64 mA sink current (I_OL) and –32 mA source current (I_OH) per output, with VOL ≤ 0.55 V and VOH ≥ 2.0 V under full-load conditions. This drive strength supports 50-pF transmission lines and multiple TTL loads.

How does the pinout of SN74LVTH16240DGGR improve PCB layout?

The SN74LVTH16240DGGR uses a flow-through architecture with inputs on one side and corresponding inverted outputs on the opposite side, enabling straight-line trace routing. Combined with distributed V_CC/GND pins, this minimizes crosstalk, reduces loop area, and simplifies impedance-controlled layout for 16-bit parallel buses.