Texas Instruments SN74LVCH16541ADLR

Overview

SN74LVCH16541ADLR from Texas Instruments is a noninverting 16-bit buffer/driver with dual 8-bit sections, 3-state outputs, bus-hold inputs, and Ioff partial-power-down support. It operates from 1.65 V to 3.6 V, accepts 5.5-V inputs, delivers 4.2 ns max propagation delay at 3.3 V, and is packaged in a 48-pin SSOP (DL) for high-density logic interfacing in mixed-voltage systems.

For engineers reviewing the SN74LVCH16541ADLR datasheet, SN74LVCH16541ADLR pinout, SN74LVCH16541ADLR application, or SN74LVCH16541ADLR equivalent, key selection criteria include its 1.65–3.6-V supply range, 5.5-V-tolerant inputs, bus-hold functionality eliminating external resistors, Ioff protection during power sequencing, and compatibility with 3.3-V/5-V level translation in memory and data bus interfaces.

Technical Context

This device implements two independent 8-bit noninverting buffer sections, each controlled by two active-low output-enable inputs (e.g., 1OE1 and 1OE2 for Section 1). Both enables must be low for corresponding Y outputs to drive; either high forces that section's eight outputs into high-impedance state. The architecture supports precise per-section output control without cross-talk.

Bus-hold circuitry actively maintains valid logic levels on undriven or floating inputs-eliminating need for external pullup/pulldown resistors-and Ioff limits current backflow when VCC = 0 V, enabling safe partial-power-down operation in hot-swap or multi-rail systems. Inputs tolerate up to 5.5 V regardless of VCC, enabling robust 3.3-V-to-5-V signal translation.

Key Specifications

Pinout & Package

SN74LVCH16541ADLR is housed in a 48-pin SSOP (Shrink Small-Outline Package), DL variant, with 0.5-mm lead pitch, 12.6 mm × 6.2 mm body size, and 1.2-mm max height. JEDEC MO-153 compliant, RoHS-compliant, and rated for –40°C to +85°C operation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74LVCH16541ADLR, SN74LVC16244ADLR reduces input-side design overhead but adds external termination complexity, while 74ALVC164245DGGR introduces direction-control overhead and dual-supply constraints-neither matches the integrated bus-hold, single-supply simplicity, and 5.5-V tolerance of SN74LVCH16541ADLR.

Availability

SN74LVCH16541ADLR is available at Aetrix Electronics and suitable for memory subsystems, FPGA peripheral expansion, mixed-voltage industrial interfaces, and programmable logic I/O buffering requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.

Supply support for SN74LVCH16541ADLR 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 innovation in high-reliability interface and power management ICs.

SN74LVCH16541ADLR belongs to TI's Widebus™ family of advanced logic devices, engineered specifically for high-speed, low-voltage, mixed-signal interfacing in computing, communications, and industrial control systems.

FAQ

What is the maximum input voltage rating for SN74LVCH16541ADLR?

The SN74LVCH16541ADLR supports an absolute maximum input voltage of 6.5 V, with recommended operation up to 5.5 V regardless of VCC level. This 5.5-V tolerance enables direct connection to 5-V logic families while powered from 1.65–3.6-V supplies-no level shifter required. Operation within this range ensures reliable bus-hold function and avoids damage to internal protection diodes.

Does SN74LVCH16541ADLR support partial-power-down mode?

Yes, SN74LVCH16541ADLR fully supports partial-power-down via its Ioff specification: when VCC = 0 V, Ioff remains ≤ ±10 µA even with inputs or outputs biased to 5.5 V. This prevents reverse current flow during power sequencing or hot-swap events, making SN74LVCH16541ADLR suitable for systems with staggered rail activation or modular backplanes.

How does bus-hold functionality work on SN74LVCH16541ADLR?

SN74LVCH16541ADLR integrates active bus-hold circuitry on all 16 data inputs (1A1–1A8, 2A1–2A8), maintaining the last-valid logic state when inputs float. It draws ±45 µA typical hold current at 2.3 V VCC and eliminates need for external pullup/pulldown resistors-reducing BOM cost, PCB area, and potential signal reflections from unterminated stubs.

What is the propagation delay of SN74LVCH16541ADLR at 3.3 V?

At VCC = 3.3 V and TA = 25°C, SN74LVCH16541ADLR guarantees a maximum propagation delay (tpd) of 4.2 ns under standard test conditions (CL = 50 pF, ∆V = ±0.3 V). This value applies to both rising and falling edges and ensures tight timing margins in high-speed memory and data-path applications operating up to ~200 MHz effective data rates.

Is SN74LVCH16541ADLR pin-compatible with other Widebus™ 16-bit buffers?

No-SN74LVCH16541ADLR uses a dedicated 48-pin SSOP (DL) pinout optimized for dual 8-bit sections with four OE inputs and distributed power/ground pins. It is not pin-compatible with SN74LVC16244ADLR (same package but different OE and pin mapping) or SN74LVCH162244ADLR (inverting variant). Always verify pin functions against the official DL-package diagram before PCB layout.