LM246J

Overview

The LM246J is a quad general-purpose operational amplifier manufactured by National Semiconductor, housed in a 16-lead Ceramic Dual In-Line Package (CDIP). It features four independent high-gain amplifiers within a single integrated circuit. Key electrical specifications include an input bias current of 30 nA, an input offset voltage of 500 μV, and a supply current of 1 mA per channel. The device offers a slew rate of 0.5 V/µs and a gain-bandwidth product of 1 MHz, with an output current capability of 20 mA per channel.

Feature Summary

• Quad configuration providing four independent operational amplifiers in a single package
• High input impedance characteristics suitable for precision signal conditioning
• Robust ceramic dual in-line packaging designed for durability in demanding environments

Applications

• General-purpose analog signal processing circuits
• Instrumentation amplifier stages
• Buffer applications requiring high input impedance

Procurement Notes

Verify the manufacturer origin carefully, as datasheets may list STMicroelectronics while market listings cite National Semiconductor due to corporate acquisitions. Confirm the package type is CDIP rather than plastic DIP or SOIC. Ensure the part number suffix matches the specific temperature range and performance grade required for your design. Cross-reference pinouts if substituting from other manufacturers.

Selection Notes

Select this component when a quad op-amp solution is required with moderate speed and low power consumption. The 1 MHz bandwidth and 0.5 V/µs slew rate suit low-frequency applications. Consider the CDIP package constraints for PCB layout and thermal management. Evaluate the 500 μV input offset voltage against system accuracy requirements before finalizing the design choice.

Part Context

The LM246 belongs to the family of quad bipolar operational amplifiers produced by National Semiconductor. This series was designed to provide multiple amplifier channels in a compact form factor. The J suffix typically denotes a military or extended temperature grade variant, though verification against specific datasheets is necessary. It represents a standard general-purpose solution for multi-channel analog processing tasks.

Replacement Considerations

Check for direct pin-compatible replacements such as the LM324 or LM348, noting differences in supply voltage ranges and offset voltages. Verify that any substitute maintains the 16-pin CDIP footprint or requires adapter solutions. Compare slew rates and bandwidths to ensure functional equivalence in the target application.