Texas Instruments SN74AHCT16244DGGR

Overview

SN74AHCT16244DGGR from Texas Instruments is a 16-bit noninverting 3-state buffer/driver in 48-pin TSSOP (DGG) package, operating at 4.5–5.5 V, with TTL-compatible inputs (VIH = 2 V, VIL = 0.8 V), ±8 mA output drive, and propagation delay ≤10.5 ns (CL = 15 pF). It serves as a high-density bus interface for memory address, clock distribution, and peripheral data lines in telecom and industrial control systems.

For engineers reviewing the SN74AHCT16244DGGR datasheet, SN74AHCT16244DGGR pinout, SN74AHCT16244DGGR application, or SN74AHCT16244DGGR equivalent, key selection criteria include 3-state output enable timing (tPZH/tPLZ ≤13 ns), input overvoltage tolerance up to 5.5 V, thermal resistance RθJA = 72.5°C/W, and compatibility with 3.3 V-to-5 V level translation in mixed-voltage systems.

Technical Context

The SN74AHCT16244DGGR implements four independent 4-bit noninverting buffers, each with dedicated active-low output-enable (OE) control (1OE–4OE), enabling selective bus isolation. Its EPIC™ CMOS process ensures latch-up immunity >250 mA and ESD protection >2000 V per MIL-STD-883.

All 16 drivers feature symmetrical output drive, slow edge rates to suppress ringing, and distributed VCC/GND pins to minimize switching noise. Inputs accept TTL logic levels and tolerate voltages beyond VCC, supporting robust interfacing between 3.3 V controllers and 5 V peripherals without external level shifters.

Key Specifications

Pinout & Package

TSSOP-48 (DGG) package: 12.50 mm × 6.10 mm body, 0.5 mm pitch, 1.2 mm max height, JEDEC MO-153 compliant, lead-free (NiPdAu), MSL Level-1.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74AHCT16244DGVR and SN74LVC16244ADGGR, the SN74AHCT16244DGGR uniquely balances 5 V bus compatibility, industrial temperature range, and thermal performance in standard TSSOP packaging - making it the default choice for mixed-voltage infrastructure equipment where reliability trumps minimal size or ultra-low voltage operation.

Availability

SN74AHCT16244DGGR is available at Aetrix Electronics and suitable for telecom infrastructure, industrial motor drives, and electronic point-of-sale terminals requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for SN74AHCT16244DGGR 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 90 years of innovation in industrial, automotive, and communications markets.

The SN74AHCT16244DGGR belongs to TI's Widebus™ family of high-density logic devices, engineered specifically to replace discrete buffers in memory, clock, and bus interface applications while minimizing PCB area and signal integrity risk.

FAQ

What is the maximum operating temperature for the SN74AHCT16244DGGR?

The SN74AHCT16244DGGR is fully specified from –40°C to +125°C ambient temperature, with electrical characteristics guaranteed across this full industrial range. This rating is validated per JEDEC JESD22-A108 and confirmed in the Recommended Operating Conditions table (Section 7.3) of the official datasheet SCLS334J. The device uses TI's EPIC™ process to maintain stability and latch-up immunity at elevated temperatures.

Does the SN74AHCT16244DGGR support 3.3 V logic inputs?

Yes, the SN74AHCT16244DGGR 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 clean recognition of 3.3 V HIGH/LOW signals. Input pins are also overvoltage tolerant up to 5.5 V, allowing safe operation even if driven by unregulated or glitch-prone 3.3 V sources.

Can the SN74AHCT16244DGGR be used as a level shifter between 3.3 V and 5 V systems?

Yes - the SN74AHCT16244DGGR functions as a unidirectional level translator: 3.3 V CMOS/TTL inputs are correctly interpreted at its VIH/VIL thresholds, and its 5 V outputs drive standard 5 V logic loads. It does not translate in reverse (5 V → 3.3 V), and output current must remain within ±8 mA per pin to avoid violating VOL/VOH specs.

What is the recommended power supply decoupling for the SN74AHCT16244DGGR?

Texas Instruments recommends placing a 0.1 µF ceramic capacitor near each VCC pin (Pins 7, 18, 31, 42) and connecting it directly to the nearest GND pin. For best noise suppression, use X7R dielectric capacitors placed ≤2 mm from the pin. Additional bulk capacitance (e.g., 1 µF) may be added at the board's main 5 V rail entry point.

How should unused input pins be handled on the SN74AHCT16244DGGR?

All unused inputs on the SN74AHCT16244DGGR must be tied to either VCC or GND - floating inputs cause increased ICC, unpredictable output states, and potential EMI. TI's application report SCBA004 confirms that tying to VCC is preferred for OE pins to ensure power-up high-impedance, while data inputs (A1–A4) may be tied to GND for deterministic LOW behavior.