LM2468TA/NOPB

Overview

The LM2468TA/NOPB is a monolithic triple high-gain CRT driver circuit designed for color monitor applications. It contains three high input impedance wideband amplifiers that directly drive RGB cathodes with an internally set gain of -20. The device operates within a supply voltage range of +60V to +85V and accepts an input voltage from 0V to +3.75V. It features a typical rise and fall time of 14ns, maintaining stability with capacitive loads up to 20pF. The component is housed in a standard 9-lead TO-220 molded plastic package.

Feature Summary

• Integrates three high input impedance wideband amplifiers for direct RGB cathode driving
• Internally fixed gain of -20 accommodates CMOS preamplifiers
• Stable operation with capacitive loads up to 20pF and inductive peaking networks
• Maintains standard LM243X family pinout for simplified PCB layout

Applications

• Color monitors supporting resolutions up to 1024 x 768 at 60 Hz
• Displays operating at 800 x 600 resolution with 72/75 Hz refresh rates
• Video systems utilizing pixel clock frequencies up to approximately 50 MHz
• Monitor designs incorporating video blanking functionality

Procurement Notes

Verify the specific ordering suffix TA against current manufacturer documentation to confirm package type and lead configuration. Confirm RoHS compliance status as indicated by the NOPB suffix. Check for availability updates as this product may be discontinued or subject to lifecycle changes. Ensure heat sink requirements are calculated based on actual load capacitance and frequency to maintain case temperature below 115°C.

Selection Notes

Select this component when designing color monitor circuits requiring direct CRT cathode drive without discrete transistor stages. Verify that the application supports the required +60V to +85V supply voltage range. Ensure the design includes adequate power supply bypassing and arc protection components to handle transient voltages. Consider thermal management strategies given the power dissipation limits associated with high-frequency operation and capacitive loading.

Part Context

The LM2468 belongs to the LM246X family of integrated CRT drivers manufactured by Texas Instruments. It serves as a replacement for discrete CRT driver solutions, offering a compact alternative for video amplifier stages. The device is compatible with the LM126X series preamplifiers and LM2479/2480 bias clamps to form complete video channels. It maintains backward compatibility with the LM243X family pinout standards.

Replacement Considerations

LM2466TA/NOPB