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

Texas Instruments SN74ABTH16244DLG4

Name: SN74ABTH16244DLG4
Brand: Texas Instruments
SKU: SN74ABTH16244DLG4
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SN74ABTH16244DLG4

Manufacturer:: Texas Instruments

Category:: Buffers, Drivers, Receivers, Transceivers

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

Datasheet:: SN74ABTH16244DLG4.pdf

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

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Product details

Overview

SN74ABTH16244DLG4 from Texas Instruments is a 16-bit noninverting buffer/driver with 3-state outputs, designed for high-density memory address, clock, and bus-oriented applications. It features –32-mA high-drive IOH, 64-mA IOL, bus-hold on all data inputs, and operates over –40°C to 85°C at 4.5–5.5 V supply. Used in industrial control backplanes and legacy parallel bus interfaces.

For engineers reviewing the SN74ABTH16244DLG4 datasheet, SN74ABTH16244DLG4 pinout, SN74ABTH16244DLG4 application, or SN74ABTH16244DLG4 equivalent, key selection criteria include output drive strength, bus-hold functionality, thermal resistance (63°C/W), and SSOP-48 package compatibility with legacy PCB layouts.

Technical Context

This device implements four independent 4-bit buffer sections, each with active-low OE control and true (noninverting) logic. Its EPIC-II^B BiCMOS architecture enables low power dissipation while maintaining TTL-compatible input thresholds and 5-V CMOS output swing.

Distributed V_CC/GND pins and flow-through pinout minimize switching noise and simplify PCB routing. Bus-hold circuitry eliminates external pullup/pulldown resistors on unused inputs, and latch-up immunity exceeds 500 mA per JESD 17.

Key Specifications

Parameter	Value and Actual Design Meaning
Supply Voltage	4.5 V to 5.5 V - Ensures robust operation across industrial 5-V rail tolerances.
Output Drive	–32 mA IOH / 64 mA IOL - Supports heavy capacitive loads and fanout to multiple TTL/CMOS inputs.
Propagation Delay	1 ns to 4.2 ns (tPLH/tPHL) - Enables reliable timing in ≤25-MHz parallel bus systems.
Bus-Hold Current	±40 µA hold current at VI = 2 V / 0.8 V - Maintains valid logic state without external biasing.
Thermal Resistance	θ_JA = 63°C/W (DL package) - Defines maximum power dissipation under natural convection cooling.
Operating Temperature	–40°C to +85°C - Qualified for extended industrial ambient conditions.
ESD Protection	>2000 V HBM, >200 V machine model - Reduces handling sensitivity during assembly.

Pinout & Package

SN74ABTH16244DLG4 uses a 48-pin Shrink Small-Outline Package (SSOP-DL), 12.6 mm × 6.2 mm × 1.95 mm body, with 0.5-mm lead pitch and gull-wing leads. Pin 1 marked by notch or beveled corner.

Pin/Terminal	Circuit Role	Design Meaning
1OE, 2OE, 3OE, 4OE	Active-low output-enable control	Each enables/disables one 4-bit buffer section; tie to V_CC via pullup for power-up high-Z state.
1A1–1A4, 2A1–2A4, 3A1–3A4, 4A1–4A4	Data inputs	16 total inputs with integrated bus-hold; no external resistors required for floating states.
1Y1–1Y4, 2Y1–2Y4, 3Y1–3Y4, 4Y1–4Y4	True (noninverting) buffered outputs	High-drive 3-state outputs; VOL ≤ 0.55 V at 64 mA ensures solid logic-low margin.
V_CC (Pins 7, 18, 28, 39)	Power supply	Distributed V_CC pins reduce simultaneous switching noise and improve PDN stability.
GND (Pins 4, 10, 15, 21, 31, 42)	Ground reference	Six dedicated GND pins provide low-inductance return paths for high-speed switching currents.

Key Features

Feature	Design Value
High-Drive Outputs	–32 mA IOH / 64 mA IOL supports driving 50-pF loads across 15-cm traces without signal degradation.
Integrated Bus-Hold	Eliminates need for 10-kΩ external pullups on unused inputs, reducing BOM count and board area.
Flow-Through Pinout	Input-to-output signal path flows left-to-right across package, enabling straight PCB trace routing and minimizing crosstalk.
Low Ground Bounce	VOLP < 1 V at V_CC = 5 V - Critical for maintaining signal integrity in dense, multi-driver systems.
Latch-Up Immunity	>500 mA per JESD 17 - Ensures robustness against transient overcurrent events in industrial environments.

Applications

Industrial Backplane Interface	Legacy Parallel Bus Driver
Use Scenario: Driving address/data lines between microcontroller and multiple peripheral ICs on a 100-mm backplane with 30-pF trace capacitance. IC Role / Device Role / Timing Role: Noninverting 16-bit buffer providing level translation and fanout amplification between 5-V MCU and TTL peripherals. Use Value: High-drive capability maintains signal rise/fall times < 3 ns, preventing setup/hold violations across temperature.	Use Scenario: Interfacing an FPGA's parallel I/O bank to a legacy ISA-style expansion slot with 8-bit data and 16-bit address buses. IC Role / Device Role / Timing Role: Four independent 4-bit buffers isolating FPGA I/O from bus contention and enabling hot-swap-safe 3-state control. Use Value: Bus-hold inputs prevent floating states during FPGA configuration, eliminating spurious bus activity before firmware initialization.
Memory Address Buffering	Clock Distribution Amplifier
Use Scenario: Buffering 16-bit address lines from a DSP to dual-port SRAM in a real-time motor control system. IC Role / Device Role / Timing Role: True-output address driver with OE-controlled 3-state for shared memory arbitration between CPU and DMA controller. Use Value: Low propagation delay (≤4.2 ns) and tight skew (<0.7 ns) ensure synchronous access timing across all 16 bits.	Use Scenario: Distributing a 20-MHz system clock to eight downstream logic devices with matched trace lengths. IC Role / Device Role / Timing Role: Low-skew, high-drive clock buffer replicating one input to four isolated outputs per section. Use Value: Distributed V_CC/GND pins suppress simultaneous switching noise that would otherwise degrade clock jitter performance.

Industrial Backplane Interface

Legacy Parallel Bus Driver

Use Scenario: Driving address/data lines between microcontroller and multiple peripheral ICs on a 100-mm backplane with 30-pF trace capacitance.

IC Role / Device Role / Timing Role: Noninverting 16-bit buffer providing level translation and fanout amplification between 5-V MCU and TTL peripherals.

Use Value: High-drive capability maintains signal rise/fall times < 3 ns, preventing setup/hold violations across temperature.

Use Scenario: Interfacing an FPGA's parallel I/O bank to a legacy ISA-style expansion slot with 8-bit data and 16-bit address buses.

IC Role / Device Role / Timing Role: Four independent 4-bit buffers isolating FPGA I/O from bus contention and enabling hot-swap-safe 3-state control.

Use Value: Bus-hold inputs prevent floating states during FPGA configuration, eliminating spurious bus activity before firmware initialization.

Memory Address Buffering

Clock Distribution Amplifier

Use Scenario: Buffering 16-bit address lines from a DSP to dual-port SRAM in a real-time motor control system.

IC Role / Device Role / Timing Role: True-output address driver with OE-controlled 3-state for shared memory arbitration between CPU and DMA controller.

Use Value: Low propagation delay (≤4.2 ns) and tight skew (<0.7 ns) ensure synchronous access timing across all 16 bits.

Use Scenario: Distributing a 20-MHz system clock to eight downstream logic devices with matched trace lengths.

IC Role / Device Role / Timing Role: Low-skew, high-drive clock buffer replicating one input to four isolated outputs per section.

Use Value: Distributed V_CC/GND pins suppress simultaneous switching noise that would otherwise degrade clock jitter performance.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
SN74ABT16244DGGR	Same logic function but TSSOP-48 (DGG) package; θ_JA = 70°C/W vs. DL's 63°C/W.	Higher thermal resistance limits max continuous output current in compact enclosures.	Prefer SN74ABTH16244DLG4 when board space allows SSOP and thermal headroom is constrained.
SN74LVC16244ADGGR	3.3-V only operation; lower drive (–24 mA / 24 mA); no bus-hold; different voltage thresholds.	Not suitable for 5-V legacy systems; requires level-shifting if interfacing with 5-V peripherals.	Select SN74ABTH16244DLG4 for 5-V bus compatibility, higher drive, and bus-hold in mixed-voltage upgrades.

Compared with SN74ABT16244DGGR, SN74ABTH16244DLG4 offers better thermal performance in SSOP packaging; compared with SN74LVC16244ADGGR, it delivers full 5-V drive strength and integrated bus-hold-critical for drop-in replacement in legacy industrial designs without layout changes.

Availability

SN74ABTH16244DLG4 is available at Aetrix Electronics and suitable for industrial backplane interfaces, legacy parallel bus drivers, memory address buffering, and clock distribution applications requiring stable component supply and long-term obsolescence management.

Supply support for SN74ABTH16244DLG4 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 industrial-grade product development.

The ABTH family targets high-reliability 5-V bus interface applications, emphasizing drive strength, noise immunity, and legacy system compatibility-designed specifically for memory, clock, and backplane signal conditioning.

FAQ

What is the recommended power-up sequence for SN74ABTH16244DLG4?

TI recommends tying all OE inputs to V_CC through a pullup resistor (minimum value determined by driver sink capability) to ensure outputs remain in high-impedance state during power ramp. This prevents bus contention before system initialization completes. The SN74ABTH16244DLG4 does not require special sequencing between V_CC and OE, but OE must be stable before applying input signals.

Does SN74ABTH16244DLG4 support hot-swap operation?

SN74ABTH16244DLG4 supports hot-swap operation when OE is held inactive (high) during insertion, ensuring outputs remain in 3-state. Its bus-hold inputs maintain valid logic levels on floating data lines, and latch-up immunity >500 mA per JESD 17 provides tolerance to transient overcurrents. However, V_CC sequencing must follow TI's recommended guidelines to avoid back-powering.

Can SN74ABTH16244DLG4 drive a 100-pF load at 25 MHz?

At CL = 100 pF, SN74ABTH16244DLG4's typical tPLH/tPHL increases to ~5.5 ns (extrapolated from 50-pF data), supporting reliable operation up to ~18 MHz. For 25-MHz operation, keep load ≤60 pF using series termination or shorter traces. The SN74ABTH16244DLG4's 64-mA IOL ensures adequate edge rate into moderate capacitive loads without external boosters.

How does bus-hold functionality work on SN74ABTH16244DLG4 inputs?

SN74ABTH16244DLG4 integrates weak feedback transistors on each A-input, creating a bistable latch that holds the last valid logic state (VI ≥ 2 V or ≤ 0.8 V) when the input floats. Hold current is ±40 µA at VI = 2 V or 0.8 V, sufficient to overcome typical PCB leakage but low enough to be overridden by standard TTL/CMOS drivers. No external components are needed.

Is SN74ABTH16244DLG4 RoHS compliant and lead-free?

Yes, SN74ABTH16244DLG4 is RoHS compliant with lead finish/NiPdAu (NIPDAU) plating and meets JEDEC Level-1 moisture sensitivity (260°C peak reflow). The SSOP-DL package uses lead-free solder compatible with standard Pb-free assembly processes, and TI certifies full compliance per EU Directive 2011/65/EU and amendments.

SN74ABTH16244DLG4 Specifications

Product attributes: Attribute value

Manufacturer:: Texas Instruments

Series:: 74ABTH

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

Packaging:: Tube

Product Status:: Discontinued at Digi-Key

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:: 32mA, 64mA

Voltage - Supply:: 4.5V ~ 5.5V

Operating Temperature:: -40°C ~ 85°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 48-SSOP

SN74ABTH16244DLG4 FAQ

1.How can I place an order for SN74ABTH16244DLG4 through Aetrix?

Please submit a Request for Quotation (RFQ) for SN74ABTH16244DLG4 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 SN74ABTH16244DLG4 reliable?

The price and inventory of SN74ABTH16244DLG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74ABTH16244DLG4 is usually 5 days.

3.What payment methods are accepted for SN74ABTH16244DLG4?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74ABTH16244DLG4 transactions.

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4.How is shipping managed for SN74ABTH16244DLG4?

SN74ABTH16244DLG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SN74ABTH16244DLG4 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 SN74ABTH16244DLG4?

For technical support, including SN74ABTH16244DLG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74ABTH16244DLG4 requirements.

6.How does Aetrix verify that SN74ABTH16244DLG4 is sourced from the original manufacturer or authorized distributors?

All SN74ABTH16244DLG4 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 SN74ABTH16244DLG4 meets industry standards.

7.What is the process for return or replacement of SN74ABTH16244DLG4?

All SN74ABTH16244DLG4 units undergo pre-shipment inspection (PSI). If there is an issue with SN74ABTH16244DLG4, 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 SN74ABTH16244DLG4 part is unused and in its original packaging.

Return procedure for SN74ABTH16244DLG4:

1.Submit a request within 90 days.

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

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