Texas Instruments SN74LVT16244BZQLR

Overview

SN74LVT16244BZQLR from Texas Instruments is a 3.3-V ABT 16-bit buffer/driver with 3-state outputs in a 56-ball VFBGA (ZQL) package. It provides true-level buffering across four independent 4-bit channels, supports mixed-mode 5-V input/3.3-V VCC operation, delivers ±64 mA output drive per channel, and enables hot insertion via Ioff and power-up 3-state logic - used in high-density FPGA I/O expansion and backplane interface modules.

For engineers reviewing the SN74LVT16244BZQLR datasheet, SN74LVT16244BZQLR pinout, SN74LVT16244BZQLR application, or SN74LVT16244BZQLR equivalent, key selection criteria include 3.3-V supply compatibility, 5-V tolerant inputs, 16-channel 3-state control granularity, thermal performance (θJA = 42°C/W), and Pb-free VFBGA packaging for space-constrained industrial control PCBs.

Technical Context

The SN74LVT16244BZQLR implements four independent 4-bit noninverting buffers, each with dedicated active-low output-enable (OE) inputs (1OE–4OE). Its Advanced BiCMOS Technology (ABT) ensures TTL-compatible output swing while operating at 3.3 V, with guaranteed 5-V input tolerance and support for unregulated battery rails down to 2.7 V.

Power sequencing is managed via built-in Ioff and power-up 3-state circuitry: outputs enter high-impedance state when VCC drops below 1.5 V or during hot insertion, preventing backflow current and bus contention. Output ground bounce (VOLP) remains under 0.8 V at 3.3 V and 25°C.

Key Specifications

Pinout & Package

SN74LVT16244BZQLR uses a 56-ball Very Thin Fine-Pitch Ball Grid Array (VFBGA) package with 0.5-mm pitch, measuring 7.0 mm × 4.5 mm × 0.9 mm (max height). The ZQL variant is Pb-free and RoHS-compliant, with MSL Level-3 rating (260°C peak reflow).

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74LVC16244ADGGR and 74ALVC16244PW, SN74LVT16244BZQLR uniquely combines 5-V input tolerance, 64 mA drive, hot-insertion capability, and extended temperature range in a space-saving VFBGA - making it the only choice for ruggedized, mixed-voltage, high-density I/O expansion.

Availability

SN74LVT16244BZQLR is available at Aetrix Electronics and suitable for industrial PLC I/O expansion, automotive body control modules, FPGA-to-peripheral interfacing, and automated test equipment requiring stable component supply across extended temperature and mixed-voltage environments.

Supply support for SN74LVT16244BZQLR 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 connectivity technologies, with decades of expertise in high-reliability logic and interface solutions.

The SN74LVT16244BZQLR belongs to TI's Widebus™ family of advanced 3.3-V ABT logic devices, engineered specifically for high-speed, mixed-voltage system interconnect in industrial, automotive, and communications infrastructure.

FAQ

What is the maximum input voltage the SN74LVT16244BZQLR can tolerate?

The SN74LVT16244BZQLR supports an absolute maximum input voltage of 7 V, but its recommended operating input voltage is up to 5.5 V. This 5-V tolerance allows direct connection to legacy 5-V logic families without level-shifting circuitry, while maintaining full functionality at its 3.3-V VCC supply - a key advantage confirmed in TI's SCBS716E datasheet Section 6.1.

Does the SN74LVT16244BZQLR support hot insertion, and how is it implemented?

Yes, the SN74LVT16244BZQLR supports hot insertion via two integrated features: Ioff circuitry disables outputs when VCC = 0 V to prevent damaging current backflow, and power-up 3-state forces outputs into high-impedance during power ramp-up or ramp-down. These functions are verified per JESD 78 Class II latch-up testing and documented in the device's functional description on page 2 of the datasheet.

What is the thermal resistance (θJA) of the SN74LVT16244BZQLR, and why does it matter?

The SN74LVT16244BZQLR has a θJA of 42°C/W in its 56-ball VFBGA (ZQL) package. This low value reflects optimized thermal design with multiple VCC/GND balls and thin-profile construction, enabling reliable operation in thermally constrained spaces like sealed industrial enclosures - critical for sustained 64 mA per-output drive without derating.

Can the SN74LVT16244BZQLR operate from a 2.7-V supply, and what performance trade-offs occur?

Yes, the SN74LVT16244BZQLR is fully specified from 2.7 V to 3.6 V. At 2.7 V, propagation delay increases to 4.6 ns (max) and output drive reduces to 48 mA (IOL), but all logic thresholds and 5-V input tolerance remain valid. This unregulated battery operation mode is explicitly validated in the Recommended Operating Conditions table (Section 6.2) of the datasheet.

How many independent 3-state control inputs does the SN74LVT16244BZQLR provide?

The SN74LVT16244BZQLR provides four independent active-low output-enable inputs: 1OE, 2OE, 3OE, and 4OE - one for each 4-bit buffer group. This enables granular control of 16 outputs in four distinct subsets, supporting flexible bus partitioning and dynamic signal routing in complex digital systems, as shown in the terminal assignments and function table of the datasheet.