Texas Instruments SN74AHC16244DGVR

Overview

SN74AHC16244DGVR from Texas Instruments is a 16-bit noninverting 3-state buffer/driver IC in TVSOP-48 package, operating from 2 V to 5.5 V supply, with ±8 mA output drive at 5 V, 7 ns typical propagation delay (VCC = 5 V, CL = 15 pF), and –40°C to 125°C temperature range - used for memory address buffering, bus isolation, and clock distribution in industrial control systems.

For engineers reviewing the SN74AHC16244DGVR datasheet, SN74AHC16244DGVR pinout, SN74AHC16244DGVR application, or SN74AHC16244DGVR equivalent, key selection criteria include its 3-state output enable architecture, input overvoltage tolerance up to 5.5 V, distributed VCC/GND pins for noise reduction, and flow-through pinout for optimized PCB layout in high-density digital interfaces.

Technical Context

The SN74AHC16244DGVR implements four independent 4-bit noninverting buffers, each with active-low 3-state output enable (1OE–4OE). Its EPIC™ CMOS process ensures latch-up immunity >250 mA and ESD protection >2 kV HBM.

All inputs tolerate voltages up to 5.5 V regardless of VCC level, enabling voltage-level translation (e.g., 5-V inputs driving 3.3-V or 2.5-V buses). Output switching is intentionally slowed to suppress ringing on light loads - critical for clean signal integrity in motor drive control and telecom backplanes.

Key Specifications

Pinout & Package

SN74AHC16244DGVR uses a 48-pin Thin Very Small Outline Package (TVSOP) with 0.4 mm pitch, body size 9.70 mm × 4.40 mm, and exposed thermal pad (non-electrical). Pin numbering follows standard TI top-view convention with GND and VCC distributed across multiple locations to minimize switching noise.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74AHC16244DGVR, SN74LVCH16244ADGGR offers higher drive but sacrifices 5-V input compatibility, while 74ALVC16244PW,118 provides similar drive in a non-flow-through package - making SN74AHC16244DGVR uniquely suitable for mixed-voltage, noise-sensitive, and layout-constrained industrial applications.

Availability

SN74AHC16244DGVR is available at Aetrix Electronics and suitable for industrial automation, telecom infrastructure, and medical device applications requiring stable component supply, extended temperature support, and long-term obsolescence management.

Supply support for SN74AHC16244DGVR 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 solutions, with decades of heritage in logic IC design and industrial-grade qualification.

SN74AHC16244DGVR belongs to the AHC logic family - engineered for high-speed, low-noise, mixed-voltage interfacing in mission-critical industrial and infrastructure systems where reliability and signal integrity are paramount.

FAQ

What is the maximum input voltage rating for SN74AHC16244DGVR?

The SN74AHC16244DGVR supports input voltages up to 5.5 V regardless of VCC level - a key feature enabling direct interfacing with 5-V logic families while operating at 2.5 V or 3.3 V. This overvoltage tolerance eliminates the need for external level shifters in mixed-voltage systems and is confirmed in Section 7.1 (Absolute Maximum Ratings) and 9.3 (Feature Description) of the official datasheet.

Does SN74AHC16244DGVR have a flow-through pinout, and why does it matter?

Yes, SN74AHC16244DGVR features a flow-through pinout: inputs (A1–A4) and outputs (Y1–Y4) for each 4-bit group are positioned on opposite sides of the TVSOP-48 package. This arrangement minimizes trace length and layer transitions in PCB layout - reducing parasitic inductance, crosstalk, and signal skew. It is explicitly called out in the "Features" section and validated in the pin configuration diagram (Figure 1).

What is the recommended power supply decoupling for SN74AHC16244DGVR?

Per Section 11 of the datasheet, each VCC pin (Pins 7, 18, 31, 42) should be bypassed with a 0.01 μF or 0.022 μF ceramic capacitor placed as close as possible to the pin. For best noise suppression, these may be paralleled with a 0.1 μF capacitor near the device's center. This multi-capacitor strategy targets both high-frequency switching noise and lower-frequency supply droop - essential given the device's four distributed VCC pins.

Can SN74AHC16244DGVR be used in automotive under-hood applications?

SN74AHC16244DGVR is rated for –40°C to 125°C operation and meets JESD17 latch-up immunity (>250 mA) and HBM ESD (>2000 V), satisfying core requirements for under-hood use. However, it is not AEC-Q100 qualified. For production automotive applications, TI recommends AEC-Q100 qualified variants like SN74AHC16244QDR, while SN74AHC16244DGVR remains suitable for prototyping, non-safety-critical subsystems, or industrial equivalents with identical thermal profiles.

How does SN74AHC16244DGVR suppress output ringing compared to standard AHC or AC buffers?

SN74AHC16244DGVR intentionally slows output edge rates (via internal drive strength tuning), as noted in Section 9.3 ("Slows edge rates, minimizing output ringing"). This reduces di/dt-induced overshoot/undershoot on lightly loaded or unterminated traces - a documented advantage over higher-drive families like AC. Measured noise characteristics (Section 7.8) confirm reduced VOL(P) and VOH(V) excursions, making it preferred for motor drive gate control and telecom line card interfaces where signal integrity is critical.