Texas Instruments SN74LVT16244BDGGR

Overview

SN74LVT16244BDGGR from Texas Instruments is a 3.3-V ABT 16-bit noninverting buffer/driver with 3-state outputs, designed for mixed-mode signal interfacing between 3.3-V logic and 5-V systems. It features four independent 4-bit sections, each with active-low output-enable (OE), supports hot insertion via Ioff and power-up 3-state, and delivers ±64 mA low-level output drive at VCC = 3.3 V. It is used in high-density bus interface applications such as memory address/data buffering in industrial controllers.

For engineers reviewing the SN74LVT16244BDGGR datasheet, SN74LVT16244BDGGR pinout, SN74LVT16244BDGGR application, or SN74LVT16244BDGGR equivalent, key selection considerations include its 48-pin TSSOP (DGG) package, 3.3-V operation with 5-V tolerant inputs/outputs, guaranteed hot-insertion support, symmetric OE control per 4-bit group, and compatibility with legacy TTL signaling levels.

Technical Context

This device implements Advanced BiCMOS Technology (ABT) to achieve low static power dissipation while maintaining high-speed performance and robust noise immunity. Each of its four 4-bit buffer sections operates independently with dedicated active-low OE inputs (1OE–4OE), enabling granular bus control without cross-talk.

It supports unregulated battery operation down to 2.7 V and provides true noninverting logic outputs with symmetrical drive strength: 64 mA sink and 32 mA source capability at VCC = 3.3 V. The Ioff circuitry ensures zero current backflow during power-down, and power-up 3-state prevents bus contention during supply ramp-up.

Key Specifications

Pinout & Package

TSSOP-48 (DGG) package: 12.6 mm × 6.2 mm × 1.2 mm body, 0.5-mm pitch, lead-free NiPdAu finish, MSL Level-1.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74LVC16244ADGGR and 74ALVC16244DGGR, the SN74LVT16244BDGGR uniquely supports full 5-V input/output interoperability at 3.3-V VCC, making it the only option among the three that eliminates external level-shifting components in mixed-voltage systems.

Availability

SN74LVT16244BDGGR is available at Aetrix Electronics and suitable for industrial PLC backplanes, automotive ECU interfaces, test equipment pattern generation, and communications baseband processor interconnects requiring stable component supply and long-term production continuity.

Supply support for SN74LVT16244BDGGR 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 over 50 years of innovation in industrial, automotive, and communications markets.

The SN74LVT16244BDGGR belongs to TI's Widebus™ family of ABT logic devices, engineered specifically for high-speed, mixed-voltage bus interfacing in mission-critical industrial and automotive control systems.

FAQ

What is the maximum operating temperature range for SN74LVT16244BDGGR?

The SN74LVT16244BDGGR is rated for operation from –40°C to +85°C ambient temperature, meeting industrial-grade thermal specifications. This range is validated per TI's recommended operating conditions and applies to the DGG package variant. Thermal impedance (θJA) is 70°C/W, allowing reliable operation under continuous 64-mA output loading within this envelope when PCB layout follows TI's thermal guidelines.

Does SN74LVT16244BDGGR support hot insertion, and how is it implemented?

Yes, SN74LVT16244BDGGR supports hot insertion via two integrated features: Ioff circuitry disables outputs when VCC = 0, preventing damaging current backflow, and power-up 3-state holds outputs in high-impedance until VCC exceeds 1.5 V. These functions are inherent to the ABT process and require no external components - confirmed in TI's SCBS716E datasheet Section 6.3 and Absolute Maximum Ratings table.

Can SN74LVT16244BDGGR drive 5-V logic inputs directly?

Yes, SN74LVT16244BDGGR can drive 5-V logic inputs directly because its outputs are 5-V tolerant when VCC = 3.3 V. The datasheet specifies VOH ≥ 2.0 V at IOL = 24 mA and VOL ≤ 0.5 V at IOL = 64 mA, satisfying TTL input thresholds (VIH ≥ 2.0 V, VIL ≤ 0.8 V). This eliminates need for external level shifters in mixed-voltage bus designs.

What is the pin count and package type of SN74LVT16244BDGGR?

SN74LVT16244BDGGR uses a 48-pin TSSOP package designated DGG, with 12.6 mm × 6.2 mm footprint, 0.5-mm lead pitch, and maximum height of 1.2 mm. Pin assignments match the top-view diagram in TI's SCBS716E datasheet Figure 1, including four independent OE inputs (1OE–4OE), 16 inputs (1A1–4A4), and 16 outputs (1Y1–4Y4), plus distributed VCC/GND pins.

How does SN74LVT16244BDGGR handle power supply ramp-up sequences?

During power-up, SN74LVT16244BDGGR enters a default high-impedance state when VCC is below 1.5 V due to internal power-up 3-state circuitry. Above 1.5 V, outputs remain disabled unless OE is actively driven low. This behavior prevents bus contention in systems with asynchronous rail sequencing - verified in the Functional Description section of the SCBS716E datasheet and confirmed by TI's application note SCBA004.