Texas Instruments SN74LVTH162541DLR

Overview

SN74LVTH162541DLR from Texas Instruments is a 3.3-V ABT 16-bit noninverting buffer/driver with 3-state outputs, designed for mixed-mode interfacing between 3.3-V logic and 5-V systems. It features dual 8-bit sections with independent output-enable controls (1OE1/1OE2 and 2OE1/2OE2), 22-Ω integrated series output resistors, and bus-hold on all data inputs. Used in backplane drivers, memory interface buffers, and hot-pluggable I/O expansion modules.

For engineers reviewing the SN74LVTH162541DLR datasheet, SN74LVTH162541DLR pinout, SN74LVTH162541DLR application, or SN74LVTH162541DLR equivalent, key selection criteria include its 48-pin SSOP (DL) package, –40°C to 85°C operating range, 12-mA drive strength, 2.7-V to 3.6-V supply tolerance, and Ioff-enabled hot-insertion support.

Technical Context

This device implements Advanced BiCMOS Technology (ABT) for low static power at 3.3-V operation while maintaining TTL-compatible input thresholds (VIL = 0.8 V, VIH = 2 V) and 5-V tolerant inputs/outputs. Each 8-bit section requires both OE inputs low to enable outputs; either high disables that section into high-impedance state.

The architecture includes distributed VCC/GND pins to suppress switching noise, flow-through pin layout for optimized PCB routing, and active bus-hold circuitry eliminating external pullup/pulldown resistors. Power-up 3-state and Ioff protection ensure safe hot insertion and prevent backflow current during partial power-down.

Key Specifications

Pinout & Package

SN74LVTH162541DLR uses a 48-pin Shrink Small-Outline Package (SSOP-DL), 12.4 mm × 6.0 mm × 1.95 mm body, with 0.5-mm lead pitch and gull-wing leads. Pin 1 marked via corner chamfer; moisture sensitivity level 1 (260°C reflow unlimited).

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74LVTH162541DLR, SN74LVC16244ADGGR trades ABT-specific advantages (5-V tolerance, bus-hold, integrated termination) for lower cost and wider VCC range, while SN74ALVCH162541GR improves propagation delay but sacrifices mixed-mode capability - making SN74LVTH162541DLR uniquely suited for legacy-system integration.

Availability

SN74LVTH162541DLR is available at Aetrix Electronics and suitable for backplane interface buffers, memory subsystem drivers, and hot-pluggable I/O expansion modules requiring stable component supply across industrial temperature ranges.

Supply support for SN74LVTH162541DLR 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 delivering analog, embedded processing, and connectivity solutions for industrial, automotive, and communications markets.

The SN74LVTH162541DLR belongs to TI's Widebus™ family of ABT logic devices, engineered specifically for high-speed, low-noise, mixed-voltage bus interfacing in mission-critical infrastructure and industrial control systems.

FAQ

What is the operating temperature range for SN74LVTH162541DLR?

The SN74LVTH162541DLR is characterized for operation from –40°C to 85°C, meeting industrial-grade thermal requirements. This range is validated per the datasheet's recommended operating conditions and applies specifically to the DL-package variant. The device maintains specified IOL/IOH, propagation delay, and bus-hold performance across this full span without derating.

Does SN74LVTH162541DLR support hot insertion, and how is it implemented?

Yes, SN74LVTH162541DLR supports hot insertion via two complementary features: Ioff circuitry disables outputs when VCC = 0, limiting reverse current to ±100 µA, and power-up 3-state forces outputs into high-impedance during VCC ramp-up. These functions are inherent to the ABT process and require no external configuration - enabling safe live insertion into powered backplanes or chassis.

Can SN74LVTH162541DLR interface directly with 5-V logic, and what pins are 5-V tolerant?

Yes, SN74LVTH162541DLR supports direct 5-V interface: all data inputs (1A1–1A8, 2A1–2A8) and outputs (1Y1–1Y8, 2Y1–2Y8) tolerate up to 5.5 V regardless of VCC level. This is explicitly specified in the Absolute Maximum Ratings table and confirmed in the "Mixed-Mode Signal Operation" feature description - no external clamping or level-shifting components are required.

What is the purpose of the four output-enable pins (1OE1, 1OE2, 2OE1, 2OE2) on SN74LVTH162541DLR?

The four output-enable pins provide granular control over the two independent 8-bit buffer sections: 1OE1 and 1OE2 jointly enable the first section's eight outputs (1Y1–1Y8), while 2OE1 and 2OE2 control the second section (2Y1–2Y8). Both OE inputs per section must be low for outputs to drive; if either is high, that section enters high-impedance - enabling flexible bus arbitration and partial bus isolation.

Is bus-hold functionality enabled by default on SN74LVTH162541DLR, and does it require external components?

Yes, bus-hold is active by default on all data inputs (1A1–1A8, 2A1–2A8) and requires no external components or configuration. It provides ±750 µA dynamic hold current to maintain the last valid logic state when inputs float, as verified in the Electrical Characteristics table. This eliminates external pullup/pulldown resistors and prevents metastability in unterminated stubs or disconnected connectors.