Texas Instruments SN74AUC16244ZQLR

Overview

SN74AUC16244ZQLR from Texas Instruments is a 16-bit 3-state buffer/driver IC designed for high-speed, low-voltage memory address and bus interface applications. It operates from 0.8 V to 2.7 V (optimized at 1.65–1.95 V), delivers ±8-mA output drive at 1.8 V, achieves 2-ns max propagation delay, and supports Ioff partial-power-down protection. It is used in DDR memory subsystems and low-power FPGA I/O expansion.

For engineers reviewing the SN74AUC16244ZQLR datasheet, SN74AUC16244ZQLR pinout, SN74AUC16244ZQLR application, or SN74AUC16244ZQLR equivalent, key selection criteria include 1.8-V operation with 3.6-V I/O tolerance, sub-2-ns timing at 1.8 V, Ioff-enabled power sequencing, 42 °C/W thermal resistance in GQL package, and compatibility with 16-bit bidirectional data buses requiring true (non-inverting) outputs and independent 4-bit group enables.

Technical Context

This device implements four independent 4-bit non-inverting buffers, each with dedicated active-low 3-state output-enable (OE) inputs (1OE–4OE). All 16 drivers share common VCC and GND rails but are partitioned into four electrically isolated 4-bit groups for localized enable control and reduced switching noise.

It uses advanced AUC logic architecture enabling sub-1-V operation while maintaining rail-to-rail output swing and robust noise margins. The Ioff circuitry actively disables outputs during power-down, blocking current backflow when VCC = 0 V and input/output voltages range from –0.5 V to 3.6 V - critical for hot-swap and mixed-voltage system interoperability.

Key Specifications

Pinout & Package

VFBGA-48 (GQL) package, 3.5 mm × 4.5 mm, 0.5-mm pitch, 1.0-mm max height, JEDEC MO-153 compliant. Ball grid arranged in 5×10 array with corner fiducials and Pin 1 marked by die-cut indicator.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74LVC16244ADGGR, SN74AUC16244ZQLR delivers 37% faster timing and true sub-1-V operation; versus SN74AUP1G17DBVR, it provides integrated 16-bit channel density and bus-oriented 3-state control - making SN74AUC16244ZQLR the sole fit for high-speed, space-constrained, multi-rail memory and interface applications.

Availability

SN74AUC16244ZQLR is available at Aetrix Electronics and suitable for DDR memory subsystems, FPGA I/O expansion, industrial PLC backplanes, and automotive ADAS sensor hub interfaces requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.

Supply support for SN74AUC16244ZQLR 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 high-reliability, high-performance ICs.

The SN74AUC16244ZQLR belongs to TI's Widebus™ family - engineered specifically to improve speed, density, and power efficiency in 3-state memory address drivers, clock fanouts, and bus-oriented transceivers for next-generation low-voltage computing platforms.

FAQ

What is the minimum operating voltage for the SN74AUC16244ZQLR?

The SN74AUC16244ZQLR is fully operational down to 0.8 V, with guaranteed AC and DC specifications across the entire 0.8-V to 2.7-V supply range. Its design is optimized for 1.65–1.95 V operation, where it achieves 2-ns maximum propagation delay and ±8-mA output drive - making SN74AUC16244ZQLR ideal for ultra-low-power applications such as battery-operated sensor nodes and energy-harvesting systems.

Does the SN74AUC16244ZQLR support hot-swap or partial-power-down operation?

Yes, the SN74AUC16244ZQLR integrates Ioff circuitry that disables all outputs when VCC = 0 V, preventing damaging current backflow from live I/O lines into the unpowered device. This feature is explicitly validated per JESD 78 Class II latch-up testing (>100 mA) and enables safe hot-plug operation in modular backplanes and multi-rail systems - a key capability not present in standard LVC-family buffers like the SN74LVC16244.

Can the SN74AUC16244ZQLR interface between 1.8-V and 3.3-V logic domains?

Yes, the SN74AUC16244ZQLR features 3.6-V I/O tolerance on all inputs and outputs, allowing it to accept 3.3-V signals while powered from a 1.8-V supply. This eliminates external level shifters in mixed-voltage designs - for example, when connecting a 1.8-V FPGA to legacy 3.3-V peripherals. The device maintains full timing and drive specifications under this condition, as confirmed in TI's SCES399E datasheet.

How is output enable managed on the SN74AUC16244ZQLR?

The SN74AUC16244ZQLR provides four independent active-low output-enable inputs (1OE through 4OE), each controlling a 4-bit buffer group. This architecture allows granular control - e.g., enabling only Group 1 and Group 3 while holding Groups 2 and 4 in high-impedance - to reduce simultaneous switching noise (SSN) and manage bus contention. Pullup resistors to VCC are recommended on all OE pins to ensure high-Z state during power-up.

What package type and thermal performance does the SN74AUC16244ZQLR use?

The SN74AUC16244ZQLR is supplied in a 48-ball VFBGA (GQL) package measuring 3.5 mm × 4.5 mm with 0.5-mm pitch. Its thermal resistance is θJA = 42 °C/W, significantly lower than TSSOP (DGG: 70 °C/W) or TVSOP (DGV: 58 °C/W) variants - enabling reliable 16-bit switching at full speed in compact, thermally constrained layouts such as portable medical devices or automotive ECUs without heatsinks or airflow.