Product Overview
Motorola LM311N High Speed Voltage Comparator DIP-8
Condition
Used equipment pull. Visual inspection completed with intact leads and legible top markings: LM311N, Motorola emblem, and date code L8609.
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Product Overview
The Motorola LM311N is a versatile, high-speed single voltage comparator in an 8-pin plastic DIP package. Operating from a single 5V rail or dual supplies up to ±15V, it drives loads referenced to ground or either supply rail with an open-collector output capable of switching up to 50V at 50mA.
Key Features
- Flexible power: operates from single 5.0V to 30V supply or dual supplies up to ±15V
- Open-collector output switches loads up to 50V and 50mA
- Fast 200ns response time with strobe capability
- Directly compatible with TTL, DTL, RTL, and MOS logic levels
- Standard through-hole 8-pin dual in-line package (DIP-8)
Applications
- Drop-in replacement for repairing legacy analog synthesizer circuits, power supplies, or test equipment
- Breadboard prototyping for window detectors, pulse generators, and zero-crossing detectors
- Maker and hobbyist sensor interface circuits driving relays, lamps, or logic inputs directly
Frequently Asked Questions
What supply configurations does the LM311N support?
It operates from either a single DC supply between 5.0V and 30V or split dual supplies up to ±15V.
Can the output directly drive a relay or LED?
Yes, the open-collector output can sink up to 50mA and handle up to 50V, allowing direct drive of small relays, indicators, or level-shifting logic circuits.
Why purchase a single pull rather than a bulk surplus lot?
Buying a single identified and visually checked component avoids surplus pack lot minimums and lets you finish a repair with the exact vintage Motorola silicon you need. Flat-rate shipping is $8, orders over $28 ship free, and everything ships same or next business day from our Idaho warehouse.
An iconic comparator from the golden age of discrete analog design, ready to drop into a socket and pull signals straight.
Shipping? $8 flat rate, free once your order passes $28 - and it leaves the Idaho warehouse the same or next business day.
