Texas Instruments SN74LVCH16244AZQLR

Overview

SN74LVCH16244AZQLR from Texas Instruments is a 16-bit noninverting buffer/driver with 3-state outputs, designed for 1.65 V to 3.6 V operation in memory address, clock, and bus driver applications. It features four independent 4-bit sections (each with dedicated active-low OE), 5.5 V tolerant inputs, bus-hold on all data inputs, and I_off support for live insertion and partial-power-down.

For engineers reviewing the SN74LVCH16244AZQLR datasheet, SN74LVCH16244AZQLR pinout, SN74LVCH16244AZQLR application, or SN74LVCH16244AZQLR equivalent, this device serves as a mixed-voltage interface solution in server memory subsystems, telecom infrastructure backplanes, and industrial control I/O expansion where 3.3 V logic must interface with 5 V signals without external level shifters.

Technical Context

The SN74LVCH16244AZQLR implements four independent 4-bit noninverting buffer sections, each with an active-low output-enable (OE) input controlling its Y outputs. All inputs accept voltages up to 5.5 V regardless of V_CC, enabling true down-translation from 5 V to 3.3 V systems.

Each section includes bus-hold circuitry eliminating external pullup/pulldown resistors, and I_off protection prevents current backflow when V_CC = 0 V-critical for hot-swap and partial-power-down operation. Propagation delay is 4.1 ns max at 3.3 V, with output drive capability of ±24 mA per pin at V_CC = 3 V.

Key Specifications

Pinout & Package

SN74LVCH16244AZQLR is packaged in a 56-ball GQL (micro BGA) package measuring 7.0 mm × 4.5 mm × 1.0 mm (body size), with ball pitch of 0.5 mm and RoHS-compliant NiPdAu finish. Pin numbering follows JEDEC MO-276AA standard for ZQL/GQL packages.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74LVC16244ADGGR and 74ALVC16244PW, SN74LVCH16244AZQLR uniquely combines 5.5 V input tolerance, integrated bus-hold, and I_off in a space-saving micro BGA-making it the sole option for compact, hot-pluggable, mixed-voltage embedded interfaces requiring zero external bias components.

Availability

SN74LVCH16244AZQLR is available at Aetrix Electronics and suitable for server memory subsystems, telecom baseband backplanes, and industrial I/O expansion modules requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.

Supply support for SN74LVCH16244AZQLR 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 90 years of innovation in industrial, automotive, and communications markets.

The SN74LVCH16244AZQLR belongs to TI's Widebus™ family of advanced logic devices, engineered specifically for high-density, low-power, mixed-voltage bus interface applications in next-generation computing and infrastructure equipment.

FAQ

What is the maximum input voltage rating for SN74LVCH16244AZQLR?

The SN74LVCH16244AZQLR supports input voltages up to 5.5 V across the full operating temperature range, regardless of V_CC level. This allows direct connection to 5 V logic sources while operating at 1.65–3.6 V V_CC, making SN74LVCH16244AZQLR ideal for down-translation in mixed-voltage systems without external level shifters.

Does SN74LVCH16244AZQLR support hot-swap or live-insertion applications?

Yes, SN74LVCH16244AZQLR includes I_off circuitry that disables outputs and limits leakage to <±10 µA when V_CC = 0 V. This prevents damaging current backflow during hot-plug events, satisfying JEDEC JESD78 requirements and enabling safe use in modular telecom and server backplane architectures where SN74LVCH16244AZQLR is deployed.

How does the bus-hold feature work on SN74LVCH16244AZQLR?

SN74LVCH16244AZQLR integrates active bus-hold circuitry on all 16 data inputs (A1–A4 per section), maintaining a valid logic state (typically ±45 µA hold current) when inputs float. This eliminates the need for external 10 kΩ pullup/pulldown resistors-reducing BOM cost and PCB area-while ensuring deterministic behavior during power-up, test, or disconnected states in systems using SN74LVCH16244AZQLR.

What is the propagation delay performance of SN74LVCH16244AZQLR at 3.3 V?

At V_CC = 3.3 V and T_A = 25°C, SN74LVCH16244AZQLR delivers a maximum propagation delay (t_pd) of 4.1 ns, with typical values around 3.0 ns. This specification applies to both t_PLH and t_PHL, ensuring symmetrical timing critical for clock distribution and address latching in high-speed memory interfaces where SN74LVCH16244AZQLR is commonly applied.

Which package type is used for SN74LVCH16244AZQLR?

SN74LVCH16244AZQLR uses the 56-ball GQL micro BGA package (7.0 mm × 4.5 mm, 0.5 mm pitch), distinct from TSSOP/TVSOP/SSOP variants of the SN74LVCH16244A family. The GQL package provides superior thermal performance (R_θJA ≈ 42°C/W), reduced parasitic inductance, and higher I/O density-making SN74LVCH16244AZQLR optimal for space-constrained, thermally demanding embedded applications.