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
Key Features
- 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
Applications
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) |
Alternate & Equivalent Parts
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.
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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.
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