74ACT715PC

Overview

The onsemi 74ACT715PC is a programmable video sync generator housed in a 20-lead Plastic Dual-In-Line Package (PDIP). 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. Default RS170/NTSC values are mask-programmed into the registers.

Feature Summary

• Generates horizontal, vertical, and composite sync and blank signals for television and monitor applications
• Supports both interlaced and non-interlaced operation formats with user-definable pulse widths
• Features TTL-compatible inputs and 8 mA drive capability on all outputs
• Includes mask-programmed default RS170/NTSC register values for simplified initialization

Applications

• Television signal generation
• Monitor timing control
• Video processing systems requiring programmable sync signals

Procurement Notes

Verify package type as the PC suffix denotes a 20-lead PDIP. Confirm availability status as this component may be discontinued or obsolete. Ensure compatibility with existing system architecture regarding TTL input levels and power supply requirements before procurement.

Selection Notes

Select the 74ACT715PC when a programmable video sync generator is required for standard television or monitor applications. Consider the ACT15-R variant if automatic clock enablement upon power-up is desired without additional circuitry. Verify that the PDIP package fits the target PCB layout constraints.

Part Context

This component belongs to the 74ACT logic family, designed for high-speed CMOS applications with TTL-compatible inputs. It serves as a specialized video synchronization generator within the broader category of linear and video processing integrated circuits manufactured by Fairchild Semiconductor and later onsemi.

Replacement Considerations

Check for direct pin-to-pin replacements from other manufacturers such as National Semiconductor LM1882 or NXP SAA1101. Verify functional equivalence regarding register programming and signal output characteristics before substitution.