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Home > Products > Integrated Circuits (ICs) > Logic > Buffers, Drivers, Receivers, Transceivers

Texas Instruments SN74AHC16244DL

Name: SN74AHC16244DL
Brand: Texas Instruments
SKU: SN74AHC16244DL
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SN74AHC16244DL

Manufacturer:: Texas Instruments

Category:: Buffers, Drivers, Receivers, Transceivers

Package:: 48-BSSOP (0.295", 7.50mm Width)

Datasheet:: SN74AHC16244DL.pdf

Description:: IC BUF NON-INVERT 5.5V 48SSOP

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Product details

Overview

SN74AHC16244DL from Texas Instruments is a 16-bit noninverting 3-state buffer/driver IC designed for memory address, clock, and bus interface applications. It operates from 2 V to 5.5 V, supports –40°C to 125°C temperature range, delivers ±8 mA output drive at 5 V, and features distributed V_CC/GND pins to minimize high-speed switching noise in dense PCB layouts.

For engineers reviewing the SN74AHC16244DL datasheet, SN74AHC16244DL pinout, SN74AHC16244DL application, or SN74AHC16244DL equivalent, key selection criteria include its 48-pin SSOP package, true-buffer logic with active-low OE per 4-bit group, low-drive edge control to suppress ringing, and overvoltage-tolerant inputs up to 5.5 V.

Technical Context

The SN74AHC16244DL implements four independent 4-bit noninverting buffers, each with dedicated active-low output-enable (OE) control - 1OE, 2OE, 3OE, and 4OE - enabling granular bus partitioning. Its EPIC™ CMOS process ensures latch-up immunity >250 mA and ESD protection >2 kV HBM.

It uses flow-through pin architecture (inputs on one side, outputs on the other) to simplify PCB routing, and its symmetrical drive strength (t_PLH/t_PHL matched within 1 ns at V_CC = 5 V, C_L = 15 pF) supports clean signal integrity in bidirectional bus systems without added termination.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CC Range	2 V to 5.5 V - enables interoperability across 2.5 V, 3.3 V, and 5 V logic domains
Output Drive	±8 mA at V_CC = 5 V - sufficient for light-load bus driving without excessive edge rate or ringing
Propagation Delay	3.9–7 ns (V_CC = 5 V, C_L = 15 pF) - balances speed and signal integrity for medium-speed buses
Input Voltage Tolerance	Up to 5.5 V regardless of V_CC - supports level translation from higher-voltage sources into lower-V_CC systems
Operating Temperature	–40°C to 125°C - qualified for industrial and extended-temperature embedded control environments
Quiescent Current	40 µA max at V_CC = 5.5 V - enables low-static-power operation in always-on subsystems
ESD Rating	2000 V HBM - meets MIL-STD-883 Class 3B for robust handling in manufacturing and field service

Pinout & Package

SN74AHC16244DL is housed in a 48-pin SSOP (Shrink Small Outline Package) with 15.80 mm × 7.50 mm body size, gull-wing leads, and standard 0.635 mm pitch. The package supports lead-free (RoHS-compliant) assembly with Level-1 moisture sensitivity rating.

Pin/Terminal	Circuit Role	Design Meaning
1OE, 2OE, 3OE, 4OE	Active-low output enable	Independent control per 4-bit section; must be pulled high via resistor during power-up to ensure Hi-Z default state
1A1–1A4, 2A1–2A4, 3A1–3A4, 4A1–4A4	Buffer input	Noninverting data inputs; tolerant to 5.5 V regardless of V_CC value
1Y1–1Y4, 2Y1–2Y4, 3Y1–3Y4, 4Y1–4Y4	Buffer output	3-state true outputs; sink/source ≤8 mA at 5 V; high-impedance when corresponding OE is high
V_CC (Pins 7, 18, 31, 42)	Power supply	Distributed V_CC pins reduce simultaneous switching noise and improve PSRR across wide frequency bands
GND (Pins 4, 10, 15, 21, 28, 34, 39, 45)	Ground reference	Eight GND pins provide low-inductance return paths and enhance signal integrity in high-density routing

Key Features

Feature	Design Value
Flow-through pinout	Input and output pins arranged on opposite sides of package to eliminate layer jumps and reduce trace crosstalk
Distributed power/ground	Four V_CC and eight GND pins minimize ground bounce and supply rail collapse during multi-bit switching
Overvoltage-tolerant inputs	Accepts 0–5.5 V input signals at any valid V_CC, enabling safe interfacing with mixed-voltage systems
Low-drive edge control	Slower edge rates (Δt/Δv ≥20 ns/V at 5 V) inherently suppress overshoot/undershoot without external damping
EPIC™ CMOS process	Guarantees latch-up immunity >250 mA per JESD17, eliminating risk of destructive latch-up in noisy environments

Applications

Memory Address Buffering	Industrial Bus Interface
Use Scenario: Driving 16-bit address lines from an MCU to SRAM or Flash memory in a PLC controller. IC Role / Device Role / Timing Role: Noninverting 3-state buffer isolating address bus during DMA cycles and enabling multi-master arbitration. Use Value: Distributed V_CC/GND pins prevent address corruption caused by simultaneous switching noise during burst reads/writes.	Use Scenario: Interfacing a 3.3 V microcontroller to legacy 5 V I/O modules in factory automation equipment. IC Role / Device Role / Timing Role: Level-translating buffer with overvoltage-tolerant inputs accepting 5 V signals while operating at 3.3 V V_CC. Use Value: Eliminates need for discrete level shifters; ±8 mA drive sustains signal integrity over 15 cm ribbon cable runs.
Telecom Backplane Driver	Medical Imaging Data Path
Use Scenario: Fan-out of clock or control signals across multiple daughter cards in a modular base station chassis. IC Role / Device Role / Timing Role: Low-noise 16-bit driver with independent OE groups enabling staggered activation to limit peak current draw. Use Value: Matched t_PLH/t_PHL (≤1 ns skew) ensures deterministic timing across all 16 outputs for synchronous backplane operation.	Use Scenario: Isolating ADC data bus from FPGA processing core in portable ultrasound equipment. IC Role / Device Role / Timing Role: 3-state buffer enabling time-multiplexed access to shared memory while preventing bus contention. Use Value: 125°C-rated operation ensures reliability inside sealed, fanless enclosures with elevated ambient temperatures.

Memory Address Buffering

Industrial Bus Interface

Use Scenario: Driving 16-bit address lines from an MCU to SRAM or Flash memory in a PLC controller.

IC Role / Device Role / Timing Role: Noninverting 3-state buffer isolating address bus during DMA cycles and enabling multi-master arbitration.

Use Value: Distributed V_CC/GND pins prevent address corruption caused by simultaneous switching noise during burst reads/writes.

Use Scenario: Interfacing a 3.3 V microcontroller to legacy 5 V I/O modules in factory automation equipment.

IC Role / Device Role / Timing Role: Level-translating buffer with overvoltage-tolerant inputs accepting 5 V signals while operating at 3.3 V V_CC.

Use Value: Eliminates need for discrete level shifters; ±8 mA drive sustains signal integrity over 15 cm ribbon cable runs.

Telecom Backplane Driver

Medical Imaging Data Path

Use Scenario: Fan-out of clock or control signals across multiple daughter cards in a modular base station chassis.

IC Role / Device Role / Timing Role: Low-noise 16-bit driver with independent OE groups enabling staggered activation to limit peak current draw.

Use Value: Matched t_PLH/t_PHL (≤1 ns skew) ensures deterministic timing across all 16 outputs for synchronous backplane operation.

Use Scenario: Isolating ADC data bus from FPGA processing core in portable ultrasound equipment.

IC Role / Device Role / Timing Role: 3-state buffer enabling time-multiplexed access to shared memory while preventing bus contention.

Use Value: 125°C-rated operation ensures reliability inside sealed, fanless enclosures with elevated ambient temperatures.

Equivalent & Alternatives

The following parts are listed as comparable options for similar buffer/driver applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
SN74AHC244PW	20-pin TSSOP; 8-bit (not 16-bit); identical AHC logic family, same V_CC range and drive strength	Suitable only where half the channel count suffices; requires two devices for full 16-bit coverage	Select when board space allows dual placement and cost-per-channel optimization is prioritized
SN74LVCH16244A	Lower V_CC min (1.65 V); higher drive (±24 mA); different pinout; LVCMOS-compatible I/O	Better suited for ultra-low-voltage systems (1.8 V) but introduces stronger edge rates requiring careful layout	Choose for battery-powered designs needing wider voltage margin and higher drive, accepting increased EMI risk

Compared with SN74AHC244PW and SN74LVCH16244A, the SN74AHC16244DL provides single-package 16-bit buffering with optimized edge control and industrial temperature support - making it preferred for space-constrained, noise-sensitive, and thermally demanding applications where pin compatibility and signal integrity are critical.

Availability

SN74AHC16244DL is available at Aetrix Electronics and suitable for industrial control systems, telecom infrastructure equipment, and medical imaging devices requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for SN74AHC16244DL 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 50 years of innovation in high-reliability logic and interface solutions.

The SN74AHC16244DL belongs to TI's Widebus™ family of high-density bus-interface ICs, engineered specifically to improve performance and layout efficiency in memory addressing, clock distribution, and 3-state bus systems.

FAQ

What is the maximum operating temperature for the SN74AHC16244DL?

The SN74AHC16244DL is rated for operation from –40°C to 125°C, meeting industrial and extended-temperature requirements. This specification is validated per JEDEC JESD78 and confirmed in the Recommended Operating Conditions table of the official datasheet (SCLS327H, Rev. October 2014). The 125°C upper limit applies across the full V_CC range (2 V to 5.5 V) and ensures reliable 3-state behavior under thermal stress.

Does the SN74AHC16244DL support level shifting between different supply voltages?

Yes, the SN74AHC16244DL supports down-level translation: its inputs tolerate voltages up to 5.5 V regardless of V_CC setting. For example, with V_CC = 3.3 V, it safely accepts 5 V logic inputs and outputs clean 3.3 V–compatible signals. However, it does not support up-level translation - outputs cannot exceed V_CC, and no internal circuitry boosts output voltage beyond the supply rail.

How should unused input pins be handled on the SN74AHC16244DL?

All unused inputs on the SN74AHC16244DL must be tied to either V_CC or GND to prevent floating states that cause increased ICC, erratic outputs, or ESD vulnerability. TI's application report SCBA004 explicitly mandates this practice. Pull-up or pull-down resistors (10–100 kΩ typical) are recommended; direct connection is acceptable if source impedance is low. Never leave inputs unconnected.

What is the purpose of the multiple V_CC and GND pins on the SN74AHC16244DL?

The SN74AHC16244DL features four V_CC pins (7, 18, 31, 42) and eight GND pins (4, 10, 15, 21, 28, 34, 39, 45) to reduce power-supply inductance and distribute return current paths. This architecture minimizes simultaneous switching noise (SSN), improves PSRR above 10 MHz, and maintains signal integrity during full 16-bit transitions - a key advantage over single-rail alternatives in high-density PCBs.

Is the SN74AHC16244DL pin-compatible with other 48-pin Widebus™ devices?

No - the SN74AHC16244DL has a unique pinout optimized for flow-through routing and distributed power. While other 48-pin Widebus™ parts (e.g., SN74AHC16373) share the SSOP (DL) package footprint, their pin assignments for data, control, and power differ significantly. Direct substitution would require PCB redesign. Always verify pin functions using the "Pin Configuration and Functions" section of the SCLS327H datasheet before replacement.

SN74AHC16244DL Specifications

Product attributes: Attribute value

Manufacturer:: Texas Instruments

Series:: 74AHC

Package/Case:: 48-BSSOP (0.295", 7.50mm Width)

Packaging:: Tube

Product Status:: Obsolete

Logic Type:: Buffer, Non-Inverting

Number of Elements:: 4

Number of Bits per Element:: 4

Input Type:: -

Output Type:: 3-State

Current - Output High, Low:: 8mA, 8mA

Voltage - Supply:: 2V ~ 5.5V

Operating Temperature:: -40°C ~ 125°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 48-SSOP

SN74AHC16244DL FAQ

1.How can I place an order for SN74AHC16244DL through Aetrix?

Please submit a Request for Quotation (RFQ) for SN74AHC16244DL on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for SN74AHC16244DL reliable?

The price and inventory of SN74AHC16244DL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74AHC16244DL is usually 5 days.

3.What payment methods are accepted for SN74AHC16244DL?

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4.How is shipping managed for SN74AHC16244DL?

SN74AHC16244DL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SN74AHC16244DL order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for SN74AHC16244DL?

For technical support, including SN74AHC16244DL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74AHC16244DL requirements.

6.How does Aetrix verify that SN74AHC16244DL is sourced from the original manufacturer or authorized distributors?

All SN74AHC16244DL products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that SN74AHC16244DL meets industry standards.

7.What is the process for return or replacement of SN74AHC16244DL?

All SN74AHC16244DL units undergo pre-shipment inspection (PSI). If there is an issue with SN74AHC16244DL, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The SN74AHC16244DL part is unused and in its original packaging.

Return procedure for SN74AHC16244DL:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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