Texas Instruments SN74LVCH16541ADL

Overview

SN74LVCH16541ADL 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 translation in 3.3-V/5-V systems such as memory interface expansion boards.

For engineers reviewing the SN74LVCH16541ADL datasheet, SN74LVCH16541ADL pinout, SN74LVCH16541ADL application, or SN74LVCH16541ADL equivalent, key selection considerations include its 48-pin SSOP (DL) package, 4.2 ns max propagation delay at 3.3 V, ±24 mA output drive capability, bus-hold functionality eliminating external resistors, and Ioff protection for hot-swap and power sequencing scenarios.

Technical Context

The SN74LVCH16541ADL implements two independent 8-bit noninverting buffer sections, each controlled by two active-low output-enable inputs: both must be low for corresponding Y outputs to drive; either high places that section's outputs in high-impedance state. Its bus-hold circuitry actively maintains valid logic levels on undriven A inputs without external biasing.

Designed for mixed-mode signal operation, the device accepts 5.5-V input signals while operating from a 1.65–3.6-V supply, making it suitable for level-shifting between legacy 5-V peripherals and modern 3.3-V logic domains. Ioff limits current backflow during partial power-down, supporting robust system-level power management.

Key Specifications

Pinout & Package

SN74LVCH16541ADL is housed in a 48-pin Shrink Small-Outline Package (SSOP), DL variant, with 0.5-mm lead pitch, 12.6 mm × 6.2 mm body size, and 1.2-mm maximum height per JEDEC MO-153.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74LVCH16541ADL, SN74LVC16244ADGGR omits bus-hold and Ioff - increasing design complexity and reducing robustness in mixed-voltage or hot-swap contexts - while 74ALVCH162244DL trades drive strength for lower power, limiting its use in high-speed or high-fanout scenarios.

Availability

SN74LVCH16541ADL is available at Aetrix Electronics and suitable for memory interface expansion, FPGA I/O bridging, and industrial PLC backplane applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for SN74LVCH16541ADL 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 experience in high-reliability industrial and automotive components.

The SN74LVCH16541ADL belongs to TI's Widebus™ family of advanced logic devices, engineered specifically for high-speed, low-voltage parallel bus applications in memory subsystems, FPGA interconnects, and modular industrial control systems.

FAQ

What is the maximum operating temperature range for the SN74LVCH16541ADL?

The SN74LVCH16541ADL is rated for operation from –40°C to +85°C ambient temperature, meeting industrial-grade thermal requirements. This range is validated across all electrical specifications in the datasheet, including propagation delay, output drive, and bus-hold performance - ensuring reliability in factory automation, motor control, and outdoor embedded systems where ambient temperatures fluctuate widely. The DL package's θJA of 63°C/W further supports thermal management in dense PCB layouts.

Does the SN74LVCH16541ADL support hot-swap or partial-power-down operation?

Yes, the SN74LVCH16541ADL supports partial-power-down operation via its Ioff specification: when VCC = 0 V, input/output leakage remains ≤ ±10 µA even with 5.5-V signals applied, preventing damaging back-current flow. This makes SN74LVCH16541ADL suitable for hot-plug applications like modular backplanes or field-replaceable I/O cards - provided OE pins are held high (via pullup to live rail) during power-off to maintain high-impedance outputs.

Can the SN74LVCH16541ADL be used as a level shifter between 5-V and 3.3-V logic domains?

Yes, the SN74LVCH16541ADL functions as a unidirectional level shifter: its inputs tolerate up to 5.5 V regardless of VCC (1.65–3.6 V), while outputs swing rail-to-rail within the VCC range. For example, with VCC = 3.3 V, it accepts 5-V microcontroller address lines and drives 3.3-V FPGA inputs. Note that output-to-input translation (3.3-V out → 5-V in) requires an additional receiver stage, as SN74LVCH16541ADL outputs do not exceed VCC.

How does the bus-hold feature on the SN74LVCH16541ADL eliminate external resistors?

The SN74LVCH16541ADL integrates active bus-hold circuitry on all 16 A-inputs, providing ±75 µA holding current at VCC = 3 V to maintain the last-valid logic state when inputs float. This eliminates the need for discrete 10-kΩ pullup/pulldown resistors - reducing BOM cost, saving PCB space, and avoiding resistor-induced timing skew. Bus-hold is always enabled; using external resistors with SN74LVCH16541ADL is not recommended per TI's design guidelines.

What is the pin-compatible replacement for SN74LVCH16541ADL in TSSOP package?

The SN74LVCH16541ADGGR is the pin-compatible TSSOP (DGG) variant of SN74LVCH16541ADL, sharing identical logic function, pinout, electrical specs, and thermal characteristics. Both use 48-pin packages with 0.5-mm pitch and JEDEC MO-153 compliance. Key differences are mechanical: DGG has 24.4-mm reel width and 1.2-mm max height vs. DL's 32.4-mm width and 2.0-mm height - requiring PCB land pattern and stencil adjustments despite pin equivalence.