Texas Instruments SN74LVC16244AGQLR

Overview

SN74LVC16244AGQLR from Texas Instruments is a 16-bit noninverting 3-state buffer/driver with four independent 4-bit sections, operating from 1.65 V to 3.6 V V_CC, supporting 5.5-V-tolerant inputs and delivering ≤4.1 ns propagation delay at 3.3 V. It enables bus isolation in memory address, clock distribution, and data bus interface applications.

For engineers reviewing the SN74LVC16244AGQLR datasheet, SN74LVC16244AGQLR pinout, SN74LVC16244AGQLR application, or SN74LVC16244AGQLR equivalent, key selection criteria include its I_off support for live insertion, mixed-voltage (3.3-V/5-V) signal translation capability, and guaranteed 3-state output leakage <±10 µA at 3.6 V.

Technical Context

The SN74LVC16244AGQLR implements four independent 4-bit noninverting buffers, each controlled by an active-low output-enable (OE) input. Its CMOS design ensures symmetrical drive strength (±24 mA at 3 V), low dynamic power (39 pF typical C_pd per buffer), and rail-to-rail output swing under load.

It features I_off circuitry enabling partial-power-down operation with zero-V_CC isolation, and supports back-drive protection. Input voltage tolerance up to 5.5 V allows direct interfacing with legacy 5-V logic while powered from 3.3-V or lower supplies.

Key Specifications

Pinout & Package

The SN74LVC16244AGQLR is packaged in a 56-ball GQL (microstar BGA) package with 12 × 12 mm body size and 0.8-mm ball pitch. Pin assignments follow JEDEC MO-276AC standard; pin 1 is located in quadrant Q1 per tape-and-reel orientation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74LVC16244AGQLR, the TSSOP and TVSOP alternatives trade BGA density and thermal performance for assembly simplicity and form factor-none offer pin compatibility, and all require distinct PCB footprints and layout rules.

Availability

SN74LVC16244AGQLR is available at Aetrix Electronics and suitable for industrial PLC backplanes, network switch control planes, memory subsystems, and mixed-voltage embedded interfaces requiring stable component supply across extended temperature ranges.

Supply support for SN74LVC16244AGQLR 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 ICs and widebus architecture.

The SN74LVC16244AGQLR belongs to TI's LVC logic family, designed specifically to enhance density and timing performance in 3-state memory address drivers, clock distribution networks, and bus-oriented transceivers for industrial and communications infrastructure.

FAQ

What is the maximum operating temperature for the SN74LVC16244AGQLR?

The SN74LVC16244AGQLR is rated for operation from –40°C to +125°C ambient temperature. This extended range is validated per JEDEC JESD78 latch-up testing and thermal characterization data, making it suitable for under-hood automotive modules, industrial controllers, and telecom base station equipment where thermal margins are critical. The SN74LVC16244AGQLR maintains full DC and AC specifications across this range.

Does the SN74LVC16244AGQLR support live insertion into a powered system?

Yes, the SN74LVC16244AGQLR supports live insertion via its I_off feature. When V_CC = 0 V, input and output leakage remains ≤±10 µA, preventing back-driving of powered buses or damage to upstream logic. This behavior is tested per JESD78 and documented in Section 7.5 of the SN74LVC16244AGQLR datasheet, enabling safe hot-swap in modular backplane systems.

Can the SN74LVC16244AGQLR translate 5-V signals to a 3.3-V system?

Yes, the SN74LVC16244AGQLR accepts input voltages up to 5.5 V regardless of V_CC level, enabling direct 5-V-to-3.3-V down-translation. With V_CC = 3.3 V, its outputs swing rail-to-rail (0 V to 3.3 V), meeting 3.3-V logic thresholds while safely clamping 5-V inputs. This eliminates external level shifters in mixed-voltage designs such as FPGA-to-legacy-peripheral interfaces.

What is the recommended bypass capacitor strategy for the SN74LVC16244AGQLR?

Each of the five V_CC pins on the SN74LVC16244AGQLR requires a dedicated 0.1-µF ceramic bypass capacitor placed within 2 mm of the ball. For optimal high-frequency noise suppression, pair each 0.1-µF cap with a 1-µF bulk capacitor near the device's power entry point. This dual-capacitor approach targets both switching transients (0.1 µF) and supply droop (1 µF), as specified in Section 11 of the SN74LVC16244AGQLR datasheet.

How does the SN74LVC16244AGQLR prevent bus contention in multi-driver systems?

The SN74LVC16244AGQLR prevents bus contention through independent active-low output-enable (OE) inputs for each 4-bit section. By asserting OE for unused sections, their outputs enter high-impedance state, electrically isolating them from the shared bus. This hardware-controlled isolation-combined with guaranteed <1 ns skew between outputs in the same group-ensures deterministic bus arbitration without software coordination or external logic.