SN74AHCT244DB Texas Instruments Integrated Circuit (Small Outline Packages) In Stock
SN74AHCT244DB is an 8-channel, 3-state octal buffer and line driver IC with TTL-compatible CMOS inputs operating from a 4.5 V to 5.5 V supply in a small-outline package. It delivers high-speed AHCT logic-level buffering for bus driving and signal isolation applications. Available from authorized distributors with worldwide shipping.
- Manufacturer
- Texas Instruments
- Package
- Small Outline Packages
- Pin Count
- 20
- Lifecycle
- ACTIVE
- Datasheet
- SN74AHCT244DB Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $0.5850(MOQ 1)
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- 8 independent 3-state buffer channels with TTL-compatible CMOS inputs, enabling direct interfacing between 5 V TTL and CMOS logic families without level-shifting circuitry
- 4.5 V to 5.5 V supply voltage range with AHCT-series high-speed CMOS performance for low-power, high-frequency bus buffering applications
- Small-outline package with 20-pin configuration providing compact board-level integration in data bus drivers, memory interfaces, and signal isolation circuits
Applications
The SN74AHCT244DB is used as an octal line driver and bus buffer in microprocessor address and data bus designs where TTL-to-CMOS level translation and signal fanout are required at 5 V supply voltage. Its 3-state outputs allow multiple drivers to share a common bus without contention, making it suitable for memory expansion, FPGA I/O buffering, and multi-board backplane communication. The device also fits industrial control systems needing reliable 8-channel signal buffering between logic sections operating at 4.5 V to 5.5 V.
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
Alternate & Equivalent Parts
Compatible alternatives and drop-in replacements for SN74AHCT244DB:
Bus Driver, AHCT/VHCT/VT Series, 2-Func, 4-Bit, True Output, CMOS, PDSO20
Bus Driver, AHCT/VHCT/VT Series, 2-Func, 4-Bit, Inverted Output, CMOS, PDSO20
Frequently Asked Questions
How many buffer channels does the SN74AHCT244DB provide and what supply voltage does it require?
The SN74AHCT244DB provides 8 independent 3-state buffer channels operating from a 4.5 V to 5.5 V supply, allowing it to drive 8 parallel data or address bus lines simultaneously with TTL-compatible CMOS inputs in high-speed logic designs.
Can the SN74AHCT244DB directly interface TTL-level outputs from older logic devices to CMOS systems?
Yes, the SN74AHCT244DB accepts TTL-compatible input voltage levels (logic-low below 0.8 V, logic-high above 2 V) while operating as a CMOS output buffer at 4.5 V to 5.5 V, enabling seamless interfacing between 5 V TTL bus drivers and AHCT CMOS logic without additional level-translation ICs.
Why are 3-state outputs important for bus-oriented designs using the SN74AHCT244DB?
The SN74AHCT244DB's 3-state outputs allow each of its 8 channels to be placed into a high-impedance state, preventing bus contention when multiple devices share a common 8-bit data or address bus, which is essential in microprocessor and memory systems where the bus is time-multiplexed among several drivers.
What is the advantage of the AHCT logic family for the SN74AHCT244DB compared to standard HC logic?
The AHCT logic family used in the SN74AHCT244DB offers faster propagation delays and higher output drive current than standard 74HC parts at the same 4.5 V to 5.5 V supply, enabling operation at higher clock frequencies in bus-buffering applications while maintaining TTL-compatible input thresholds for backward compatibility with 5 V TTL systems.
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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.
| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 1+ | $0.9750 | $0.97 |
| 6+ | $0.7800 | $4.68 |
| 27+ | $0.5850 | $15.79 |
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