Product Overview
Texas Instruments SN74ALS244A-1N 3-State Octal Buffer Line Driver IC DIP-20
Condition
Used pull. Legible package markings confirm Texas Instruments logo, 46AJ9EK date/lot code, and SN74ALS244A-1N part number. Visual inspection shows intact DIP-20 leads. Evaluation: Visual inspection only. Function testing not performed. Verify suitability before use.
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Product Overview
The Texas Instruments SN74ALS244A-1N is an Advanced Low-Power Schottky (ALS) TTL octal buffer and line driver configured with dual 4-bit non-inverting buffers and independent active-low output enables. Designed for driving memory address buses, clock lines, and bus-oriented transmitters, the "-1" version provides an enhanced low-level output sink current (I_OL) rating of 48 mA. Housed in a standard 20-pin through-hole DIP package, it runs on nominal 5.0 V logic supplies (4.5 V to 5.5 V) across standard commercial temperature ranges.
Key Features
- Octal buffer and line driver with 3-state non-inverting outputs
- Advanced Low-Power Schottky (ALS) logic family design
- Organized as dual 4-bit sections with independent active-low output enables (1OE, 2OE)
- Enhanced sink current rating (I_OL = 48 mA on -1 variant) for high-fanout bus driving
- Standard nominal 5.0 V VCC operating voltage (4.5 V to 5.5 V range)
- Through-hole 20-pin plastic dual in-line package (DIP-20, 300-mil body width)
Applications
- Breadboard prototyping and digital bus buffering on 5V retrocomputing builds
- Direct board-level repair and socketed maintenance on legacy industrial controller boards
- Clock line distribution and high-capacitance bus isolation in TTL-level embedded systems
- Custom bench projects and maker interfaces needing 48mA output drive capability
Frequently Asked Questions
What differentiates the SN74ALS244A-1N from standard 74ALS244 variants?
The "-1" suffix designates an enhanced low-level output current rating capable of sinking up to 48 mA, compared to standard 24 mA versions, allowing it to drive heavier loads and high-fanout lines.
What operating voltage does this logic IC require?
This component operates on standard 5.0 V nominal TTL supply levels within a 4.5 V to 5.5 V operating window.
Why buy an individually identified logic IC pull here?
Finding the exact "-1" high-drive ALS variant often means buying large mixed surplus lots or paying inflated distributor minimums. This listing gives you the verified part you need for immediate repairs without excess inventory. Shipping is an $8 flat rate, free on orders over $28, and ships same or next business day from our Idaho warehouse.
Reliable logic chips do not go out of style when there is a classic circuit that needs the right drive level to start talking again.
