Texas Instruments SN74LVCH16541ADGVR

Overview

SN74LVCH16541ADGVR from Texas Instruments is a noninverting 16-bit buffer/driver with 3-state outputs, designed for 1.65-V to 3.6-V VCC operation. It features dual 8-bit sections with independent output-enable controls (1OE1/1OE2 and 2OE1/2OE2), bus-hold on all data inputs, Ioff partial-power-down support, and 5.5-V tolerant inputs-enabling mixed-voltage interfacing in 3.3-V/5-V systems such as industrial backplanes and memory expansion modules.

For engineers reviewing the SN74LVCH16541ADGVR datasheet, SN74LVCH16541ADGVR pinout, SN74LVCH16541ADGVR application, or SN74LVCH16541ADGVR equivalent, key selection criteria include its 4.2-ns max propagation delay at 3.3 V, ±24-mA drive strength, TVSOP-48 package footprint, and compatibility with high-speed address/data bus isolation in FPGA-to-ASIC interconnects.

Technical Context

The SN74LVCH16541ADGVR implements two independent 8-bit noninverting buffer sections, each controlled by two active-low output-enable inputs (e.g., 1OE1 and 1OE2 must both be low for 1Y1–1Y8 to drive). Its bus-hold circuitry actively maintains valid logic states on undriven inputs without external resistors, eliminating floating node risks in hot-swap or low-activity bus segments.

Ioff functionality ensures outputs are disabled and isolated during power-down, preventing backflow current when VCC = 0 V while inputs remain at 5.5 V. Input voltage tolerance up to 5.5 V-regardless of VCC level-enables direct connection to legacy 5-V logic without level-shifting components.

Key Specifications

Pinout & Package

SN74LVCH16541ADGVR is housed in a 48-pin Thin Very Small Outline Package (TVSOP-DGV), 3.6 mm × 9.7 mm body size, 0.4 mm lead pitch, JEDEC MO-153 compliant, with 1.2 mm max height-optimized for high-density PCB layouts requiring fine-pitch surface-mount assembly.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74LVC16244ADGGR and 74ALVC164245DGGR, the SN74LVCH16541ADGVR uniquely combines bus-hold, Ioff, and full 5.5-V input tolerance in a unidirectional 16-bit buffer-making it optimal for robust, low-BOM-count, mixed-voltage isolation where reliability and simplicity are prioritized over bidirectionality or minimal quiescent current.

Availability

SN74LVCH16541ADGVR is available at Aetrix Electronics and suitable for industrial backplane interfaces, FPGA-to-ASIC bridging, memory expansion modules, and test equipment signal conditioning requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for SN74LVCH16541ADGVR 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 for industrial, automotive, and communications markets.

The SN74LVCH16541ADGVR belongs to TI's Widebus™ family of advanced logic devices, engineered specifically for high-speed, low-voltage, mixed-signal interfacing in space-constrained, thermally demanding embedded systems.

FAQ

What is the maximum propagation delay of the SN74LVCH16541ADGVR at 3.3 V?

The maximum propagation delay (tpd) of the SN74LVCH16541ADGVR is 4.2 ns when operating at VCC = 3.3 V and TA = 25°C. This value is specified under standard load conditions (CL = 50 pF) and ensures timing compliance in high-speed 100-MHz bus applications. The SN74LVCH16541ADGVR maintains consistent performance across its full 1.65–3.6-V operating range, with tpd increasing to 5 ns at 1.8 V.

Does the SN74LVCH16541ADGVR support partial-power-down operation?

Yes, the SN74LVCH16541ADGVR supports partial-power-down operation via its Ioff feature. When VCC = 0 V, the Ioff circuitry disables all outputs and limits leakage current to ±10 µA-even with inputs or outputs held at 5.5 V. This prevents damaging backflow current in modular systems where boards may be inserted or removed while other slots remain powered, making the SN74LVCH16541ADGVR suitable for hot-swap backplane designs.

Can the SN74LVCH16541ADGVR interface 5-V logic signals with a 3.3-V supply?

Yes, the SN74LVCH16541ADGVR accepts input voltages up to 5.5 V regardless of VCC level, enabling direct connection to 5-V TTL or CMOS outputs while powered from 3.3 V. Its output VOH/VOL levels remain compatible with 3.3-V logic thresholds, and bus-hold circuitry maintains valid states on undriven inputs-making the SN74LVCH16541ADGVR ideal for seamless 5-V/3.3-V domain bridging without external level shifters.

What package type is used for the SN74LVCH16541ADGVR?

The SN74LVCH16541ADGVR uses a 48-pin Thin Very Small Outline Package (TVSOP-DGV), measuring 3.6 mm × 9.7 mm with 0.4 mm lead pitch and 1.2 mm maximum height. It complies with JEDEC MO-153 and is optimized for high-density PCB assembly using standard reflow profiles (MSL Level-1, 260°C peak). The SN74LVCH16541ADGVR's pinout matches other Widebus™ 48-pin variants, simplifying footprint reuse across logic families.

How does bus-hold functionality work on the SN74LVCH16541ADGVR?

The SN74LVCH16541ADGVR integrates active bus-hold circuitry on all 16 data inputs (1A1–1A8, 2A1–2A8), which detects and latches the last-valid logic state when an input floats. It sources or sinks ±45 µA (at VCC = 2.3 V) to maintain that state-eliminating the need for external pullup or pulldown resistors. Bus-hold is always enabled and cannot be disabled; using external resistors with the SN74LVCH16541ADGVR is not recommended as it may cause contention or increased power draw.