Texas Instruments SN74LVC16244AZQLR

Overview

SN74LVC16244AZQLR from Texas Instruments is a 16-bit noninverting 3-state buffer/driver IC designed for 1.65-V to 3.6-V V_CC operation, supporting mixed-voltage interfacing with 5.5-V-tolerant inputs. It features four independent 4-bit sections, each with active-low output-enable (OE) control, and delivers ≤4.6 ns propagation delay at 3.3 V. It is used in high-density bus driving, memory address buffering, and clock distribution in servers and telecom infrastructure.

For engineers reviewing the SN74LVC16244AZQLR datasheet, SN74LVC16244AZQLR pinout, SN74LVC16244AZQLR application, or SN74LVC16244AZQLR equivalent, key selection criteria include its 3.6-V max V_CC, I_off live-insertion support, 5.5-V input tolerance, and quad-section 3-state architecture for flexible bus isolation.

Technical Context

This device implements a true-buffer architecture with symmetrical active-low OE inputs per 4-bit group, enabling precise section-level bus control. Each of the four groups contains four noninverting buffers with independent enable logic, allowing use as four 4-bit, two 8-bit, or one 16-bit driver without internal signal inversion.

It supports mixed-mode signal operation: inputs tolerate up to 5.5 V regardless of V_CC (1.65–3.6 V), enabling down-translation from 5-V logic to 3.3-V or 1.8-V systems. The I_off feature ensures high-impedance isolation and back-drive protection when V_CC = 0 V.

Key Specifications

Pinout & Package

The SN74LVC16244AZQLR is packaged in a 48-pin ZQL (56-ball micro BGA) package with 0.5-mm pitch and 7.0 mm × 4.5 mm body size. Pin assignments follow the ZQL ball map defined in TI's SCAS699C datasheet.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 16-bit 3-state buffer applications.

Compared with SN74LVC16244ADGGR and SN74LVC16244ADGVR, the SN74LVC16244AZQLR provides the smallest PCB footprint and best thermal performance via solder-ball interconnects, making it optimal for high-density 5G and automotive ADAS modules where board area and thermal resistance are critical.

Availability

SN74LVC16244AZQLR is available at Aetrix Electronics and suitable for server memory subsystems, industrial PLC backplanes, 5G baseband units, and automotive ADAS domain controllers requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for SN74LVC16244AZQLR 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 decades of expertise in high-reliability interface and buffer ICs.

The SN74LVC16244A belongs to TI's Widebus™ family, engineered specifically to improve density and timing performance of 3-state memory address drivers, clock distribution networks, and bus-oriented receivers/transmitters in computing and communications systems.

FAQ

What is the maximum operating temperature for SN74LVC16244AZQLR?

The SN74LVC16244AZQLR is rated for operation from –40°C to +125°C ambient temperature, as confirmed in the Recommended Operating Conditions table of the SCAS699C datasheet. This full industrial temperature range applies across all supported V_CC levels (1.65 V to 3.6 V) and validates its use in base station radios and under-hood automotive modules where thermal margins are critical. The ZQL package's thermal metrics (e.g., R_θJA ≈ 42°C/W) further support reliable operation at maximum junction temperature.

Does SN74LVC16244AZQLR support live insertion or hot-swap applications?

Yes, the SN74LVC16244AZQLR supports live insertion via its I_off feature, which limits input/output leakage to ±20 μA when V_CC = 0 V. This prevents back-driving of powered circuitry during card insertion/removal and is explicitly validated per JEDEC JESD78. The feature is functional across all 5.5-V-tolerant pins and is independent of OE state, making SN74LVC16244AZQLR suitable for modular server and telecom chassis designs.

Can SN74LVC16244AZQLR interface directly between 5-V and 3.3-V logic domains?

Yes, SN74LVC16244AZQLR accepts input voltages up to 5.5 V regardless of V_CC (1.65–3.6 V), enabling direct connection to 5-V TTL or CMOS outputs without external level shifters. Its outputs swing rail-to-rail (0 V to V_CC) and are compatible with 3.3-V or 1.8-V receivers. This down-translation capability is verified across all temperature ranges and is a core design feature highlighted in the Functional Description and Applications sections of the datasheet.

What is the propagation delay of SN74LVC16244AZQLR at 1.8 V V_CC?

At V_CC = 1.8 V and T_A = –40°C to 85°C, the maximum propagation delay (t_pd) of SN74LVC16244AZQLR is 6.6 ns, as specified in Table 7.6 of SCAS699C. At the extended –40°C to 125°C range, the max t_pd increases to 7.1 ns. These values are measured under standard load conditions (30 pF, ΔV = ±0.15 V) and confirm deterministic timing behavior even at minimum supply voltage.

How many independent output-enable controls does SN74LVC16244AZQLR provide?

The SN74LVC16244AZQLR provides four independent active-low output-enable inputs: 1OE, 2OE, 3OE, and 4OE. Each controls a dedicated 4-bit buffer group (e.g., 1OE enables/disables outputs 1Y1–1Y4). This architecture enables granular bus segmentation-such as isolating memory address lanes from control signals-without requiring external logic or multiplexing, as confirmed in the Function Table and Block Diagram of the datasheet.