74ACT715RPC

Overview

The onsemi 74ACT715RPC is a programmable video sync generator housed in a 20-pin Plastic Dual-In-Line (PDIP) 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 unit operates within a supply voltage range of 4.5V to 5.5V.

Feature Summary

• Generates horizontal, vertical, and composite sync and blank signals for display systems
• Supports both interlaced and non-interlaced operation formats
• Allows complete control over pulse width through register programming
• Includes mask-programmed default RS170/NTSC values for simplified startup

Applications

• Televisions
• Monitors
• Video signal generation systems

Procurement Notes

Verify the specific suffix 'RPC' confirms the 20-PDIP package configuration. Confirm the part number matches the ACT715 variant rather than the ACT715-R variant, as they differ in default clock enable states. Check manufacturer documentation for current availability status, as legacy logic components may have limited production runs or end-of-life designations.

Selection Notes

Select this component when a dedicated hardware solution for generating standard video timing signals is required without complex microcontroller overhead. Ensure the system architecture accommodates the TTL-compatible input thresholds and the 4.5V to 5.5V operating voltage range. Consider the 20-PDIP package constraints if PCB space allows for through-hole mounting.

Part Context

This device belongs to the 74ACT family of high-speed CMOS logic devices. It is functionally related to the 74ACT715-R, which differs primarily in its default power-up state regarding the internal clock enable bit. Both variants share identical pinouts and functional capabilities but cater to different initialization preferences in video timing applications.

Replacement Considerations

Public confirmed substitute part numbers include 74ACT715PC.