74ACT715SC

Overview

The onsemi 74ACT715SC is a programmable video sync generator in a 20-lead SOIC package. It generates horizontal, vertical, and composite sync and blank signals for televisions and monitors. The device supports interlaced and non-interlaced modes with user-definable pulse widths via register programming. It features TTL-compatible inputs, an 8 mA output drive capability, and a maximum input clock frequency exceeding 130 MHz. The part includes mask-programmed default RS170/NTSC values and allows for separate or composite signal outputs.

Feature Summary

• Generates horizontal, vertical, and composite sync and blank signals for display systems
• Supports both interlaced and non-interlaced operation modes with user-defined pulse widths
• Includes mask-programmed default RS170/NTSC timing values for simplified startup
• Features TTL-compatible inputs and Schmitt trigger inputs for improved noise immunity

Applications

• Televisions
• Monitors
• Video synchronization circuits

Procurement Notes

Verify the specific suffix 'SC' corresponds to the 20-lead Small Outline Integrated Circuit (SOIC) package. Confirm that the device status is current, as this component may be discontinued. Ensure the design utilizes the correct logic levels and power supply requirements specified in the datasheet for reliable operation.

Selection Notes

Select the 74ACT715SC when a programmable video sync generator is required for standard definition video applications. This part is suitable for designs needing customizable horizontal and vertical timing parameters. Consider the ACT15-R variant if automatic clock enable upon power-up is desired without additional circuitry.

Part Context

This component belongs to the 74ACT family of high-speed CMOS logic devices. It is manufactured by onsemi, formerly Fairchild Semiconductor. The device is designed to interface with TTL-compatible logic while operating at higher speeds typical of ACT series components. It serves as a specialized solution for video timing generation within consumer electronics.

Replacement Considerations

Direct substitutes include the 74ACT715-RSC, which shares the same SOIC package but defaults to a clock-enabled state. Other variants in the 74ACT715 family may offer different packaging options such as PDIP.