LM211N

Overview

The LM211N is a voltage comparator manufactured by STMicroelectronics, housed in an 8-pin PDIP through-hole package. It features low input currents and operates over a wide supply voltage range from single +5 V to standard ±15 V. The output is compatible with RTL-DTL, TTL, and MOS circuits, capable of switching voltages up to +50 V at output currents as high as 50 mA. Key electrical parameters include a maximum input current of 150 nA, a differential input voltage range of ±30 V, power consumption of 135 mW at ±15 V, and a typical response time of 0.2 µs.

Feature Summary

• Designed for operation across a wide range of supply voltages, supporting both standard operational amplifier supplies and single IC logic supplies.
• Output stage provides compatibility with various logic families including RTL-DTL, TTL, and MOS circuits.
• Capable of handling high output currents and switching significant voltage levels.

Applications

• Signal conditioning in industrial systems
• Voltage monitoring in automotive electronics
• Logic interface circuits

Procurement Notes

Verify the specific suffix 'N' corresponds to the PDIP package and commercial temperature grade (0°C to +70°C) required for your design. Confirm that the open-collector output configuration aligns with your pull-up requirements. Ensure the 50 mA output current capability meets the load demands of your target logic family or circuit application.

Selection Notes

Select this component when a general-purpose comparator with robust output drive capabilities is needed. It is suitable for designs requiring compatibility with multiple logic standards. Consider the 0.2 µs response time for speed requirements. Verify that the single-supply +5 V operation fits your system architecture if dual supplies are not available.

Part Context

The LM211N belongs to the LM211/LM311 family of voltage comparators. These devices share identical pinouts and functional characteristics, differing primarily in temperature ranges and manufacturing batches. The LM211 variant typically covers the commercial temperature range, while the LM311 often extends to industrial grades. They serve as direct replacements for older comparator designs in legacy systems.

Replacement Considerations

The LM311N is functionally equivalent regarding electrical performance and pinout. Verify temperature specifications if operating outside the commercial range. Other generic comparers may require level shifting due to different output structures.