Product Overview
National Semiconductor DM74LS05N Hex Inverter Open-Collector Logic IC DIP-14
Condition
New old stock (NOS). Unused surplus inventory. Lead legs show slight cosmetic tarnishing from age.
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Product Overview
The National Semiconductor DM74LS05N contains six independent inverters with open-collector outputs in a through-hole 14-pin dual-in-line package. Built on Low-Power Schottky TTL technology, these gates require external pull-up resistors and are suited for wired-AND configurations, level shifting, and driving higher-voltage indicator circuits.
Key Features
- Six independent inverter gates
- Open-collector outputs for wired-AND logic and bus driving
- Low-Power Schottky (LS) TTL circuitry
- 5.0 V nominal operating voltage (4.75 V to 5.25 V range)
- 8 mA low-level output sink current (IOL)
- Standard 14-pin through-hole DIP package
Applications
- Level shifting between 5V TTL logic and higher voltage circuitry
- Driving indicator lamps, LEDs, and low-current relays
- Servicing legacy digital instrumentation, arcade boards, and retro computers
- Breadboard prototyping and digital logic experiments
Frequently Asked Questions
What is the difference between the 74LS04 and 74LS05?
The standard 74LS04 uses totem-pole outputs that actively drive high and low states. The 74LS05 features open-collector outputs, requiring an external pull-up resistor to establish a logic high voltage.
Why buy individual logic chips here instead of a bulk surplus lot?
Ordering individual pieces lets you source the exact component needed for a repair or build without paying for excess parts. Each unit is individually checked to ensure legible markings and intact leads. Shipping is $8 flat rate, free once the order passes $28, and orders leave the Idaho warehouse the same or next business day.
Open-collector outputs were the workhorse solution that made mixed-voltage boards talk before modern level shifters took over. Keep a couple in your parts bin and you can patch a temperamental digital bus back together in an afternoon.
