Texas Instruments SN74AHCT16244DLG4

Overview

SN74AHCT16244DLG4 from Texas Instruments is a 16-bit noninverting 3-state buffer/driver IC with four independent 4-bit sections, TTL-compatible inputs (VIH = 2 V, VIL = 0.8 V), 5-V supply operation, and ±25 mA output drive per channel. It enables high-density bus interfacing in memory address, clock distribution, and peripheral driver applications where controlled signal isolation and noise-immune edge rates are required.

For engineers reviewing the SN74AHCT16244DLG4 datasheet, SN74AHCT16244DLG4 pinout, SN74AHCT16244DLG4 application, or SN74AHCT16244DLG4 equivalent, key selection considerations include its 4.5–5.5 V operating range, 10.5 ns max propagation delay (CL = 15 pF), 125°C max operating temperature, 3-state output enable architecture, and SSOP-48 (DL) package with distributed VCC/GND pins for low-noise switching.

Technical Context

The SN74AHCT16244DLG4 implements four independent 4-bit noninverting buffers, each with dedicated active-low output-enable (OE) control. Its EPIC™ CMOS process delivers TTL-level input compatibility while maintaining CMOS power efficiency and latch-up immunity (>250 mA per JESD17).

Each buffer section operates with symmetrical drive strength (IOH/ IOL = ±8 mA at VCC = 4.5 V), supports up-translation from 3.3-V logic to 5-V buses, and features slow edge-rate control to suppress output ringing-critical for clean signal integrity on lightly loaded PCB traces and backplanes.

Key Specifications

Pinout & Package

SN74AHCT16244DLG4 uses a 48-pin Shrink Small Outline Package (SSOP-DL) with 0.5-mm pitch, 12.50 mm × 6.10 mm body size, and exposed thermal pad not present (standard DL). Pin layout follows flow-through architecture to minimize PCB trace crossovers and reduce parasitic inductance.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74AHCT16244DGGR and SN74LVCH16244ADGGR, SN74AHCT16244DLG4 uniquely combines 5-V bus compatibility, industrial temperature range, and SSOP mechanical robustness-making it optimal for legacy system upgrades and harsh-environment control modules where voltage translation and reliability outweigh raw speed.

Availability

SN74AHCT16244DLG4 is available at Aetrix Electronics and suitable for telecom infrastructure, electronic points of sale, and motor drive applications requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.

Supply support for SN74AHCT16244DLG4 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 50 years of innovation in high-reliability interface and signal-chain components.

The SN74AHCT16244DLG4 belongs to TI's Widebus™ family of high-density bus-interface ICs, designed specifically to replace discrete transistor arrays and older 74-series logic in memory addressing, clock distribution, and peripheral driver subsystems.

FAQ

What is the maximum operating temperature for SN74AHCT16244DLG4?

The SN74AHCT16244DLG4 is fully specified from –40°C to +125°C ambient temperature, making it suitable for under-hood automotive, industrial motor control, and telecom base station applications where extended thermal range is critical. This rating is validated per JEDEC JESD22-A108 and confirmed in the Recommended Operating Conditions table of the official datasheet SCLS334J.

Does SN74AHCT16244DLG4 support 3.3-V input logic levels?

Yes, SN74AHCT16244DLG4 accepts 3.3-V logic inputs reliably: its VIH threshold is 2.0 V minimum and VIL is 0.8 V maximum at VCC = 4.5–5.5 V, ensuring full compatibility with 3.3-V CMOS and TTL outputs without external level shifters. This enables direct up-translation from 3.3-V microcontrollers to 5-V buses.

How should unused input pins be handled on SN74AHCT16244DLG4?

All unused input pins on SN74AHCT16244DLG4 must be tied to either VCC or GND-never left floating-to prevent undefined logic states, increased supply current, and potential device malfunction. The TI application report SCBA004 explicitly recommends pullup/pulldown resistors (typically 10 kΩ) for unused OE or A inputs to maintain noise immunity and stable 3-state behavior.

What is the recommended bypass capacitor configuration for SN74AHCT16244DLG4?

TI recommends placing a 0.1-μF ceramic capacitor near each VCC pin (Pins 7, 18, 31, 42) of SN74AHCT16244DLG4, with shortest possible trace length to adjacent GND pins. For systems with high-frequency noise, paralleling a 1-μF capacitor improves low-frequency decoupling. This configuration is specified in Section 11 of the SCLS334J datasheet to suppress switching transients and stabilize VCC under load.

Is SN74AHCT16244DLG4 pin-compatible with other Widebus™ 16-bit buffers?

SN74AHCT16244DLG4 shares identical pinout and function mapping with SN74AHCT16244DGGR and SN74AHCT16244DGVR across all 48 pins, including OE, A, Y, VCC, and GND assignments. However, mechanical differences (SSOP vs. TSSOP/TVSOP) require PCB footprint revision; electrical behavior and timing remain fully interchangeable per TI's Widebus™ family documentation.