SN74HCT244NS Texas Instruments Integrated Circuit (Small Outline Packages) In Stock
The SN74HCT244NS is a non-inverting octal buffer and line driver with 3-state outputs from Texas Instruments in the HCT CMOS logic family. It contains two independent 4-bit sections with output-enable control, TTL-compatible inputs, and operates from a 5V supply in a 20-pin PDIP package. Available from stock with worldwide shipping.
- Manufacturer
- Texas Instruments
- Package
- Small Outline Packages
- Pin Count
- 20
- Lifecycle
- ACTIVE
- Datasheet
- SN74HCT244NS Datasheet PDF
- Category
- Integrated Circuit
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of SN74HCT244NS?
- Octal (8-bit) non-inverting buffer with 3-state outputs organized as two independent 4-bit sections, each with its own output-enable for flexible bus driving
- HCT (High-speed CMOS TTL-compatible) logic family accepting TTL-level input thresholds at 5V supply, simplifying interfacing between TTL and CMOS logic systems
- 3-state outputs allowing multiple devices to share a common bus without bus contention when outputs are disabled
- High output drive current compatible with standard TTL loads for direct driving of data buses and address lines in microprocessor systems
- 20-pin PDIP through-hole package ideal for prototyping, breadboarding, and legacy board designs requiring easy hand-assembly
What is SN74HCT244NS used for?
The SN74HCT244NS is widely used as a data bus buffer and line driver in microprocessor and microcontroller systems, providing isolation between the CPU data bus and peripheral devices to prevent bus loading. It is commonly found in address buffers, memory interface circuits, and I/O port expanders where TTL-compatible logic levels and 3-state bus control are required. The device is also used in test fixtures, embedded system prototypes, and legacy industrial equipment where through-hole PDIP packaging is preferred.
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
Where can I find the SN74HCT244NS datasheet?
SN74HCT244NS Datasheet DownloadOfficial datasheet from Texas Instruments
What are equivalent replacements for SN74HCT244NS?
Compatible alternatives and drop-in replacements for SN74HCT244NS:
Frequently Asked Questions
What is the output configuration of the SN74HCT244NS?
The SN74HCT244NS features 3-state (tri-state) non-inverting outputs organized as two independent 4-bit groups. Each group has its own active-low output-enable pin, allowing each half to be individually connected to or disconnected from a shared bus, enabling controlled multiplexing of data sources.
What logic family does the SN74HCT244NS belong to?
The SN74HCT244NS belongs to the HCT (High-speed CMOS TTL-compatible) logic family, which combines CMOS power efficiency with TTL-compatible input thresholds at 5V VCC. This makes it directly interoperable with standard 74LS and 74TTL devices without level translation, simplifying mixed-logic system design.
What package does the SN74HCT244NS use?
The SN74HCT244NS uses a 20-pin PDIP (plastic dual in-line package) through-hole package. The PDIP format is ideal for prototyping on breadboards and in socketed designs, and is commonly used in legacy industrial equipment, academic lab kits, and repair/replacement applications.
How many bits does the SN74HCT244NS buffer?
The SN74HCT244NS buffers 8 bits total, organized as two independent 4-bit sections. Each section has four non-inverting buffer channels and a shared output-enable input, making the device equivalent to two quad buffers in a single 20-pin package, as indicated by its 2-element, 4-bit-per-element organization.
What are typical applications for the SN74HCT244NS?
Typical applications include microprocessor data bus buffering, address line drivers, memory chip enable drivers, I/O port multiplexing, and signal isolation in TTL and CMOS mixed-logic systems. The 3-state outputs make it well-suited for any application requiring multiple drivers to share a common data bus.
Related Guides
CSD87313DMS Synchronous Buck Power Stage Design Guide
Design a compact CSD87313DMS synchronous buck stage with practical guidance for loss, gate drive, PCB layout, EMI, thermal validation, and sourcing.
Aug 6, 2026
STEF05SGR eFuse Selection Guide for 5 V Overcurrent Protection
Choose STEF05SGR for 5 V overcurrent protection by checking current-limit margin, inrush, thermal loss, fault response, and sourcing.
Aug 6, 2026
C0402C103K3RACTU Selection Guide: Choosing a 10 nF 0402 MLCC
Select C0402C103K3RACTU by voltage margin, X7R behavior, tolerance, 0402 assembly risk, and qualified alternatives.
Aug 4, 2026
STM32H753VIT6 MCU Selection Guide: Memory, Package, Connectivity, and Security
Choose STM32H753VIT6 by evaluating memory architecture, LQFP-100 pin fit, connectivity, security, power, and sourcing tradeoffs.
Aug 4, 2026
Why Buy from FindMyChip
About Texas Instruments
Texas Instruments (TI) is a global semiconductor company headquartered in Dallas, Texas. TI designs and manufactures analog and embedded processing chips used in industrial, automotive, consumer, communications, and enterprise systems.
More from Texas Instruments
In Stock · 24h Response · Worldwide Shipping
Response within 24 hours · Worldwide shipping
“Their engineering team helped us find a pin-compatible alternative when our original MCU went EOL.”
You May Also Like
ACS770ECB-200U-PFF-T
Allegro Microsystems
Integrated Circuit
ACS770KCB-150U-PFF-T
Allegro Microsystems
Integrated Circuit
MC33901WEF
NXP
Integrated Circuit
MC7808BDTRKG
ON Semiconductor
Integrated Circuit
PA94EC
Apex Microtechnology
Integrated Circuit
AP7315-28SR-7
Diodes Inc.
Integrated Circuit
74HCT245D
Nexperia
Integrated Circuit
CY62256VNLL-70ZXCT
Cypress Semiconductor
Integrated Circuit
EPM7032AETC44-4N
Intel
Integrated Circuit
EPM3512AQC208-10N
Intel
Integrated Circuit
EPM3256ATC144-7N
Intel
Integrated Circuit
EPM3256AQC208-7N
Intel
Integrated Circuit
EPM3256AQC208-10N
Intel
Integrated Circuit
EPM3128ATC100-7N
Intel
Integrated Circuit
EPM1270F256C4N
Intel
Integrated Circuit
EPF8282ATC100-4N
Intel
Integrated Circuit
EPF6016QC208-2N
Intel
Integrated Circuit
EPF6016ATC144-3N
Intel
Integrated Circuit
EPF10K30ATC144-3N
Intel
Integrated Circuit
EPC2TI32N
Intel
Integrated Circuit
EPC2LC20
Intel
Integrated Circuit
EP3SL150F1152C4N
Intel
Integrated Circuit
EP2SGX60DF780C5N
Intel
Integrated Circuit
EP2SGX60CF780C5N
Intel
Integrated Circuit