Send an Inquiry

To receive a quote for your project, please fill in the following information, and we’ll get back to you promptly.

Submit Inventory List

Please fill in the following information, and we’ll get back to you promptly.

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

Texas Instruments SN74ABT244AN

Name: SN74ABT244AN
Brand: Texas Instruments
SKU: SN74ABT244AN
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Compare

Part No.:: SN74ABT244AN

Manufacturer:: Texas Instruments

Category:: Buffers, Drivers, Receivers, Transceivers

Package:: 20-DIP (0.300", 7.62mm)

Datasheet:: SN74ABT244AN.pdf

Description:: IC BUFF NON-INVERT 5.5V 20DIP

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:512

Please send an inquiry. Send us your inquiry, and we will respond immediately.

Product details

Overview

SN74ABT244AN from Texas Instruments is an octal noninverting 3-state buffer/line driver in a 20-pin PDIP package, designed for memory address and bus driving applications. It features high-drive outputs (−32 mA IOH, 64 mA IOL), low output ground bounce (<1 V VOLP), and operates over −40°C to 85°C at 4.5–5.5 V supply.

For engineers reviewing the SN74ABT244AN datasheet, SN74ABT244AN pinout, SN74ABT244AN application, or SN74ABT244AN equivalent, this device is selected for high-density 3-state bus interfacing where symmetrical active-low OE control, TTL-compatible inputs, and robust latch-up immunity (>500 mA) are required.

Technical Context

The SN74ABT244AN implements two independent 4-bit noninverting buffers, each with dedicated active-low output-enable (OE) inputs. Its EPIC-II™ BiCMOS process enables fast switching (tPLH/tPHL ≤ 4.6 ns @ 5 V, CL = 50 pF) while reducing power dissipation versus standard bipolar TTL.

It supports true 3-state operation with high-impedance outputs when OE is high, and includes built-in ESD protection (>2000 V HBM, >200 V MM) and latch-up immunity exceeding JEDEC JESD-17. Input thresholds are TTL-compatible (VIH = 2 V min, VIL = 0.8 V max).

Key Specifications

Parameter	Value and Actual Design Meaning
Supply Voltage	4.5 V to 5.5 V - compatible with standard 5-V TTL and CMOS systems without level-shifting.
Output Drive	−32 mA IOH / 64 mA IOL - drives heavy capacitive loads and multiple TTL inputs directly.
Propagation Delay	tPLH/tPHL ≤ 4.6 ns @ VCC = 5 V, CL = 50 pF - enables high-speed bus buffering up to ~100 MHz data rates.
Input Thresholds	VIH = 2 V min, VIL = 0.8 V max - ensures reliable logic-level recognition across temperature and voltage variation.
Operating Temperature	−40°C to +85°C - qualified for industrial-grade embedded and computing applications.
Package	20-pin PDIP (N) - through-hole mounting compatible with legacy prototyping, test fixtures, and low-volume production.
ESD Protection	2000 V HBM, 200 V MM - reduces risk of handling damage during assembly and field service.

Pinout & Package

SN74ABT244AN uses a 20-pin plastic dual in-line package (PDIP-N) with 0.3-inch body width and standard DIP lead spacing. Pin 1 is located at the top-left corner adjacent to the notch or dot marking.

Pin/Terminal	Circuit Role	Design Meaning
1OE, 2OE	Active-low output enable	Controls 4-bit group Y1–Y4 or Y1'–Y4'; tie to VCC via pullup for power-up high-Z safety.
1A1–1A4, 2A1–2A4	Noninverting data inputs	Accept TTL/CMOS logic levels; unused inputs must be tied high or low to prevent floating.
1Y1–1Y4, 2Y1–2Y4	Noninverting buffered outputs	Drive external buses or memory lines; high-impedance when corresponding OE is high.
GND (Pin 10), VCC (Pin 20)	Power terminals	Decoupling capacitor (0.1 µF) recommended at VCC–GND near the package for noise suppression.

Key Features

Feature	Design Value
High-Drive Outputs	64-mA sink capability allows direct drive of 10+ standard TTL loads without external buffers.
Low Ground Bounce	VOLP < 1 V at VCC = 5 V ensures signal integrity on shared ground planes in dense PCB layouts.
EPIC-II™ BiCMOS Process	Combines bipolar speed with CMOS low static power, achieving <250 µA ICC in disabled state.
Robust Latch-Up Immunity	Exceeds 500 mA per JEDEC JESD-17 - prevents destructive latch-up under transient overvoltage conditions.
TTL-Compatible Inputs	VIH/VIL thresholds match legacy TTL families, enabling seamless integration into mixed-logic systems.

Applications

Memory Address Buffering	System Bus Transceiver Interface
Use Scenario: Driving address lines from a microcontroller to multiple SRAM or ROM chips in a shared-bus architecture. IC Role / Device Role / Timing Role: Noninverting 3-state buffer isolating CPU address outputs from memory address inputs; OE synchronized with memory select signals. Use Value: Prevents bus contention during memory access arbitration and supports hot-swap-capable memory expansion slots.	Use Scenario: Interfacing between a 5-V CPU data bus and peripheral devices with varying load capacitance and timing margins. IC Role / Device Role / Timing Role: Bidirectional bus driver enabling controlled data flow direction via separate OE controls for each 4-bit segment. Use Value: Eliminates need for discrete pull-up resistors and reduces propagation delay skew across parallel data lines.
Clock Distribution Network	Legacy Peripheral Expansion
Use Scenario: Distributing a system clock or strobe signal to multiple synchronous peripherals with matched trace lengths. IC Role / Device Role / Timing Role: Low-skew, high-fanout clock buffer with identical tPLH/tPHL for precise edge alignment across outputs. Use Value: Maintains setup/hold timing margins for downstream flip-flops and eliminates clock jitter induced by capacitive loading.	Use Scenario: Adding ISA-style I/O expansion headers to modern embedded controllers requiring 5-V tolerant, plug-and-play compatibility. IC Role / Device Role / Timing Role: Level-translating and fanout buffer for control/address signals between host MCU and legacy peripheral cards. Use Value: Enables drop-in replacement of obsolete 74LS244 in repair and upgrade scenarios without layout changes.

Memory Address Buffering

System Bus Transceiver Interface

Use Scenario: Driving address lines from a microcontroller to multiple SRAM or ROM chips in a shared-bus architecture.

IC Role / Device Role / Timing Role: Noninverting 3-state buffer isolating CPU address outputs from memory address inputs; OE synchronized with memory select signals.

Use Value: Prevents bus contention during memory access arbitration and supports hot-swap-capable memory expansion slots.

Use Scenario: Interfacing between a 5-V CPU data bus and peripheral devices with varying load capacitance and timing margins.

IC Role / Device Role / Timing Role: Bidirectional bus driver enabling controlled data flow direction via separate OE controls for each 4-bit segment.

Use Value: Eliminates need for discrete pull-up resistors and reduces propagation delay skew across parallel data lines.

Clock Distribution Network

Legacy Peripheral Expansion

Use Scenario: Distributing a system clock or strobe signal to multiple synchronous peripherals with matched trace lengths.

IC Role / Device Role / Timing Role: Low-skew, high-fanout clock buffer with identical tPLH/tPHL for precise edge alignment across outputs.

Use Value: Maintains setup/hold timing margins for downstream flip-flops and eliminates clock jitter induced by capacitive loading.

Use Scenario: Adding ISA-style I/O expansion headers to modern embedded controllers requiring 5-V tolerant, plug-and-play compatibility.

IC Role / Device Role / Timing Role: Level-translating and fanout buffer for control/address signals between host MCU and legacy peripheral cards.

Use Value: Enables drop-in replacement of obsolete 74LS244 in repair and upgrade scenarios without layout changes.

Equivalent & Alternatives

The following parts are listed as comparable options for similar octal noninverting buffer applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
SN74ABT244ADWR	Same electrical specs; SOIC-20 (DW) package with gull-wing leads and 1.27-mm pitch.	Suitable for automated SMT assembly; requires reflow profile compliance (Level-1-260C-UNLIM).	Select for volume production where board space and assembly efficiency outweigh through-hole serviceability needs.
SN74ABT244APWR	Same logic function; TSSOP-20 (PW) package with 0.65-mm pitch and 1.2-mm max height.	Enables ultra-compact designs; higher thermal resistance (θJA = 128°C/W) vs. PDIP (67°C/W).	Choose for space-constrained applications where thermal derating and manual rework feasibility are acceptable trade-offs.

Compared with SN74ABT244ADWR and SN74ABT244APWR, the SN74ABT244AN offers superior thermal performance and hand-soldering accessibility in legacy systems, while maintaining identical AC/DC specifications and pinout mapping - making it ideal for prototyping, repair, and low-volume industrial control boards.

Availability

SN74ABT244AN is available at Aetrix Electronics and suitable for memory address buffering, system bus interfacing, clock distribution networks, and legacy peripheral expansion requiring stable component supply and long-term industrial availability.

Supply support for SN74ABT244AN 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 delivering analog and embedded processing solutions across industrial, automotive, and communications markets.

The SN74ABT244AN belongs to TI's ABT logic family, engineered for high-speed, high-drive 3-state bus interface applications in industrial computing and legacy system upgrades where reliability and pin compatibility are critical.

FAQ

What is the maximum output current rating for SN74ABT244AN?

The SN74ABT244AN supports −32 mA high-level output current (IOH) and 64 mA low-level output current (IOL) per channel under recommended operating conditions. These values ensure robust drive capability for TTL loads and moderate capacitive bus lines without external amplification. The SN74ABT244AN maintains these ratings across its full industrial temperature range (−40°C to +85°C).

Does SN74ABT244AN require external pull-up resistors on its OE inputs?

Yes - to guarantee high-impedance outputs during power-up or power-down sequences, each OE input (1OE and 2OE) should be tied to VCC through an external pull-up resistor. The minimum resistance value depends on the current-sinking capability of the controlling driver but is typically 4.7 kΩ to 10 kΩ. This prevents undefined output states that could cause bus contention in the SN74ABT244AN.

Is SN74ABT244AN RoHS compliant?

Yes, SN74ABT244AN is RoHS compliant with Pb-Free (RoHS) lead finish and CU NIPDAU termination. It meets EU Directive 2011/65/EU requirements and carries no exemptions. The device is marked "SN74ABT244AN" on the package and shipped in tube packaging with 20 units per tube.

Can SN74ABT244AN operate at 3.3 V?

No - SN74ABT244AN is specified only for 4.5 V to 5.5 V supply operation. Its input thresholds, output drive strength, and internal BiCMOS circuitry are optimized for 5-V TTL compatibility. For 3.3-V systems, consider TI's SN74LVC244A or SN74ALVC244, which are explicitly characterized down to 1.65 V and offer compatible functionality.

What is the thermal resistance (θJA) of SN74ABT244AN in its PDIP package?

The junction-to-ambient thermal resistance (θJA) for SN74ABT244AN in the 20-pin PDIP (N) package is 67°C/W, as confirmed in the official TI datasheet SCBS099J. This value assumes standard JEDEC 2S2P test board conditions and enables conservative thermal design for continuous operation at full output drive within the −40°C to +85°C ambient range.

SN74ABT244AN Specifications

Product attributes: Attribute value

Manufacturer:: Texas Instruments

Series:: 74ABT

Package/Case:: 20-DIP (0.300", 7.62mm)

Packaging:: Bulk

Product Status:: Active

Logic Type:: Buffer, Non-Inverting

Number of Elements:: 2

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:: Through Hole

Supplier Device Package:: 20-PDIP

SN74ABT244AN FAQ

1.How can I place an order for SN74ABT244AN through Aetrix?

Please submit a Request for Quotation (RFQ) for SN74ABT244AN 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 SN74ABT244AN reliable?

The price and inventory of SN74ABT244AN are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74ABT244AN is usually 5 days.

3.What payment methods are accepted for SN74ABT244AN?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74ABT244AN transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SN74ABT244AN?

SN74ABT244AN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SN74ABT244AN 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 SN74ABT244AN?

For technical support, including SN74ABT244AN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74ABT244AN requirements.

6.How does Aetrix verify that SN74ABT244AN is sourced from the original manufacturer or authorized distributors?

All SN74ABT244AN 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 SN74ABT244AN meets industry standards.

7.What is the process for return or replacement of SN74ABT244AN?

All SN74ABT244AN units undergo pre-shipment inspection (PSI). If there is an issue with SN74ABT244AN, 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 SN74ABT244AN part is unused and in its original packaging.

Return procedure for SN74ABT244AN:

1.Submit a request within 90 days.

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

Tech Hub

2026-09-03 Logic Level Shifter: How to Connect 3.3V and 5V Logic Safely

A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.

2026-09-03 74HC595 vs TPIC6B595: Output Drive, Pinout, Current, and Load Selection

The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…

2026-09-01 74HC595 Pinout, Timing, Output Current, and Applications

The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…

2026-09-01 Latch vs Flip-Flop: Timing, Differences and Design Choices

A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…

2026-08-30 D Latch Circuit: Truth Table, Timing, ICs and Applications

A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …

2026-08-28 SR Latch Explained: NOR and NAND Circuits, Truth Tables, and Applications

An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…

2026-08-27 Latch Circuit: SR and D Latches, Truth Tables, Timing, and Applications

Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…

2026-08-21 What Is an LED Driver? Types, Circuits, Dimming, and Selection

An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…

2026-08-18 Operational Amplifier (Op Amp): Basics, Configurations, Feedback and Applications

Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…

2026-08-14 Jumper Cables: How to Use, Connect and Choose Them Safely

Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…