Part # 74ACT715 datasheet

Part Manufacturer: Fairchild Semiconductor

Fairchild Semiconductor

Part Description: 74ACT715, 74ACT715-R Programmable Video Sync Generator

Part Details:

74A CT715, April 2007 74A 74ACT715, 74ACT715-R tm Programmable Video Sync Generator CT715-R Pr Features General Description Maximum Input Clock Frequency > 130MHz The ACT715 and ACT715-R are 20-pin TTL-input Interlaced and non-interlaced formats available compatible devices capable of generating Horizontal,Vertical and Composite Sync and Blank signals for tele- ogrammab Separate or composite horizontal and vertical Sync and Blank signals available visions and monitors. All pulse widths are completelydefinable by the user. The devices are capable of gener- Complete control of pulse width via register ating signals for both interlaced and noninterlaced programming modes of operation. Equalization and serration pulses All inputs are TTL compatible can be introduced into the Composite Sync signal when le 8mA drive on all outputs needed. Video Sync Generator Default RS170/NTSC values mask programmed into Four additional signals can also be made available when registers Composite Sync or Blank are used. These signals can ACT715-R is mask programmed to default to a Clock be used to generate horizontal or vertical gating pulses, Enable state for easier start-up into 14.31818MHz cursor position or vertical Interrupt signal. RS170 timing These devices make no assumptions concerning thesystem architecture. Line rate and field/frame rate are alla function of the values programmed into the data regis-ters, the status register, and the input clock frequency. The ACT715 is mask programmed to default to a ClockDisable state. Bit 10 of the Status Register, Register 0,defaults to a logic "0". This facilitates (re)programmingbefore operation. The ACT715-R is the same as the ACT715 in allrespects except that the ACT715-R is mask pro-grammed to default to a Clock Enabled state. Bit 10 ofthe Status Register defaults to a logic "1". Althoughcompletely (re)programmable, the ACT715-R version isbetter suited for applications using the default14.31818MHz RS-170 register values. This featureallows power-up directly into operation, following a singleCLEAR pulse. Ordering Information Package Order Number Number Package Description 74ACT715SC M20B 20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300" Wide 74ACT715-RSC M20B 20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300" Wide Device also available in Tape and Reel. Specify by appending suffix letter "X" to the ordering number. FACTTM is a trademark of Fairchild Semiconductor Corporation.

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74ACT715.pdf Datasheet