Texas Instruments SN74LVCH16244ADLR

Overview

SN74LVCH16244ADLR from Texas Instruments is a 16-bit noninverting 3-state buffer/driver with four independent 4-bit sections, operating from 1.65 V to 3.6 V, supporting 5.5-V-tolerant inputs and delivering 4.1 ns max propagation delay at 3.3 V. It enables bus isolation in memory address, clock, and data bus applications for servers and network switches.

For engineers reviewing the SN74LVCH16244ADLR datasheet, SN74LVCH16244ADLR pinout, SN74LVCH16244ADLR application, or SN74LVCH16244ADLR equivalent, key selection criteria include Ioff-enabled live insertion support, bus-hold on all inputs eliminating external resistors, mixed-mode 3.3-V/5-V signal translation capability, and thermal performance in SSOP-48 package.

Technical Context

The SN74LVCH16244ADLR implements four independent 4-bit noninverting buffers, each controlled by an active-low output-enable (OE) input. Its Ioff circuitry disables outputs and blocks current backflow when VCC = 0 V, enabling safe partial-power-down operation.

Bus-hold circuitry actively maintains valid logic states on all 16 inputs without external pullup/pulldown resistors. Inputs tolerate up to 5.5 V regardless of VCC level (1.65–3.6 V), allowing direct interfacing between 5-V legacy logic and 3.3-V system buses.

Key Specifications

Pinout & Package

SN74LVCH16244ADLR is packaged in SSOP-48 (DL package), body size 15.88 mm × 7.49 mm, with 0.635-mm lead pitch and gull-wing leads. Pin numbering follows standard DL top-view orientation.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar buffer/driver applications.

Compared with SN74LVC16244ADLR and 74ALVC16244PW, SN74LVCH16244ADLR uniquely combines Ioff, bus-hold, and 5.5-V input tolerance in a single SSOP-48 device - essential for robust, maintenance-friendly industrial and telecom infrastructure designs.

Availability

SN74LVCH16244ADLR is available at Aetrix Electronics and suitable for servers, network switches, and industrial PLCs requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.

Supply support for SN74LVCH16244ADLR 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 and power management ICs.

The SN74LVCH16244ADLR belongs to TI's Widebus™ family of advanced bus-interface devices, engineered specifically for high-density memory addressing, clock buffering, and mixed-voltage bus isolation in enterprise and industrial systems.

FAQ

What is the maximum propagation delay of the SN74LVCH16244ADLR at 3.3 V?

The SN74LVCH16244ADLR has a maximum propagation delay (tpd) of 4.1 ns at VCC = 3.3 V, TA = 25°C, measured under standard load conditions (CL = 50 pF). This value is guaranteed across the full operating temperature range (-40°C to +125°C) and voltage range (1.65 V to 3.6 V), making it suitable for timing-critical address and control bus applications where deterministic latency is required. The SN74LVCH16244ADLR achieves this performance while maintaining low ground bounce and symmetrical rise/fall times.

Does the SN74LVCH16244ADLR support live insertion or hot-swap applications?

Yes, the SN74LVCH16244ADLR supports live insertion via its Ioff feature, which disables outputs and blocks current backflow when VCC = 0 V. This prevents damage during hot-plug events in modular backplanes or field-replaceable units. The SN74LVCH16244ADLR also includes bus-hold on all inputs, eliminating floating states during insertion. These features are fully characterized per JESD 17 and validated across the -40°C to +125°C operating range - critical for telecom and server applications where uptime is paramount.

Can the SN74LVCH16244ADLR interface between 5-V and 3.3-V logic systems?

Yes, the SN74LVCH16244ADLR accepts input voltages up to 5.5 V regardless of VCC level (1.65–3.6 V), enabling reliable down-translation from 5-V microcontrollers or peripherals into 3.3-V system buses. Its outputs swing rail-to-rail within the VCC domain, ensuring clean logic levels for downstream 3.3-V receivers. The SN74LVCH16244ADLR does not require external level-shifting components, simplifying design and improving signal integrity in mixed-voltage architectures such as industrial I/O modules and legacy system upgrades.

What package type is used for the SN74LVCH16244ADLR, and what are its mechanical dimensions?

The SN74LVCH16244ADLR uses the SSOP-48 (DL) package, with nominal body dimensions of 15.88 mm × 7.49 mm and 0.635-mm lead pitch. It features gull-wing leads compatible with standard surface-mount reflow processes (MSL Level-1, peak reflow 260°C). This package provides higher thermal dissipation than TVSOP variants and fits established footprint layouts for industrial and telecom boards where mechanical robustness and thermal performance are prioritized over ultra-compact size.

How does the bus-hold feature on the SN74LVCH16244ADLR eliminate the need for external resistors?

The SN74LVCH16244ADLR integrates active bus-hold circuitry on all 16 inputs, which detects and latches the last valid logic state when an input floats, maintaining it without external pullup or pulldown resistors. This reduces BOM cost, saves PCB area, and avoids resistor-induced timing skew or noise susceptibility. The bus-hold current is specified at ±75 µA (max) and operates across the full VCC range (1.65–3.6 V) and temperature range (–40°C to +125°C), ensuring reliability in uncontrolled environments where inputs may be disconnected or unterminated.