LM248N

Overview

The LM248N is a quad operational amplifier manufactured by Texas Instruments, formerly National Semiconductor. It consists of four independent, high-gain, internally compensated bipolar amplifiers designed to provide functional characteristics identical to the UA741. The device operates within a supply voltage range of 8 V to 36 V single supply or ±4 V to ±18 V dual supply. Key electrical parameters include a gain-bandwidth product of 1 MHz, a slew rate of 500 mV/µs, and an input offset voltage of 6 mV. It draws 2.4 mA of operating current and provides 25 mA output current per channel with a common-mode rejection ratio of 90 dB.

Feature Summary

• Contains four independent operational amplifiers with internal frequency compensation
• Provides functional characteristics identical to the standard UA741 operational amplifier
• Designed for low power consumption with total supply current compatible with a single UA741

Applications

• General-purpose analog signal processing circuits
• Industrial control systems requiring multiple amplifier channels
• Audio pre-amplification stages

Procurement Notes

Verify the manufacturer designation as Texas Instruments, which acquired National Semiconductor's analog portfolio. Confirm the package type is PDIP-14 and ensure the RoHS compliance status matches specific production lot requirements. Cross-reference the part number against official Texas Instruments documentation to confirm pinout compatibility with legacy UA741 designs.

Selection Notes

Select this component when a design requires four isolated op-amps in a single package while maintaining strict space constraints. It is suitable for applications needing UA741 performance but with reduced power dissipation. Ensure the operating temperature range of -25°C to +85°C meets environmental specifications. Verify that the 1 MHz bandwidth and 500 mV/µs slew rate are sufficient for the target signal frequencies.

Part Context

The LM248N belongs to the LM248 series of quad bipolar operational amplifiers. This series was developed to offer a compact solution for multi-channel amplification tasks. It serves as a direct functional replacement for older quad variants of the UA741, providing a standardized interface for designers transitioning from discrete or single-channel solutions to integrated quad architectures.

Replacement Considerations

LM348N: Verified substitute offering identical functionality and pinout compatibility.