LM1282N

Overview

The LM1282N is a single-chip NTSC/PAL encoder and RGB video amplifier system manufactured by National Semiconductor. It integrates three video amplifier channels with an on-screen display (OSD) generator within a 28-pin MDIP package. The device features a -3dB bandwidth of 110 MHz, supporting high-frequency signal processing for standard definition video applications. It operates with a supply current of 95 mA and provides an output current of 28 mA per channel. The component combines RGB inputs with composite video and S-video outputs, including integrated clamping and sync generators to streamline video signal encoding.

Feature Summary

• Integrates RGB video amplification with NTSC/PAL encoding capabilities on a single chip
• Includes built-on-screen display (OSD) generation functionality
• Features integrated signal conditioning components such as clamping circuits and sync generators

Applications

• Standard general-purpose video systems
• RGB to composite video conversion equipment
• S-video interface modules
• Video encoders requiring on-screen display overlays

Procurement Notes

Verify the manufacturer status carefully, as National Semiconductor has been acquired by Texas Instruments. Confirm whether the specific batch is an original National Semiconductor product or a TI continuation. Check for discontinued status indicators in supplier catalogs. Ensure the package type matches the required 28-pin MDIP specification. Validate authenticity through authorized distribution channels due to potential legacy availability issues.

Selection Notes

Select this component when a combined solution for RGB amplification and NTSC/PAL encoding is required. It is suitable for designs needing integrated OSD support without external logic. Consider the 110 MHz bandwidth requirement for signal integrity. Evaluate the 28-pin MDIP package constraints against PCB layout limitations. Assess power consumption needs relative to the 95 mA supply current specification.

Part Context

This part belongs to the LM1282 series of video amplifier systems. It serves as a specialized integrated circuit for analog video processing tasks. The component bridges the gap between digital control interfaces and analog video outputs. It represents a consolidated approach to video signal handling in legacy consumer electronics and industrial video equipment.

Replacement Considerations

Consult Texas Instruments documentation for direct successors or pin-compatible alternatives. Verify functional equivalence regarding OSD integration and bandwidth specifications before substitution.