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LM311DR
IC COMPARATOR GENERAL PURPOSE 8-SOIC
Texas Instruments
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Design a Custom BoardAbout This Component
Single-channel voltage comparator in 8-SOIC package with open-collector output and adjustable hysteresis. Accepts dual supply (±5V to ±15V) or single supply operation with typical response time under 200ns. Ideal for threshold detection, zero-crossing detection, and analog-to-digital signal conversion in precision measurement and industrial control applications.
Package: SOIC-8 (3.9×4.9mm) · 8 pins
Why does this need a breakout?
An 8-pin SOIC with 1.27mm pitch is too fine for breadboards and hand-soldering without a microscope. A breakout board routes these pins to standard 0.1" headers, enabling rapid prototyping and reliable connections for op-amps, transceivers, and small power MOSFETs without requiring reflow equipment.
Specifications
ELECTRICAL CHARACTERISTICS
| Manufacturer | Texas Instruments |
| Part Number | LM311DR |
| Package | SOIC-8 (3.9×4.9mm) |
| Pin Count | 8 |
| Number of Elements | 1 |
| Output Type | MOS, Open-Collector, Open-Emitter, TTL |
| Type | Standard (General Purpose) |
| Voltage - Supply, Single/Dual (±) | 3.5V ~ 30V, ±1.75V ~ 15V |
What's Included
BILL OF MATERIALS
- 1x LM311DR soldered onto breakout PCB
- Pin headers pre-soldered (2.54mm / 0.1" pitch)
- All IC pins broken out to 2.54mm headers
Breakout Board Design
PCB SPECIFICATIONS
WIDTH
< 0.9" (straddles breadboard)
PITCH
2.54mm standard
SOLDER
Lead-free, reflow assembled
FINISH
FR4, lead-free HASL