Datenblatt-Suchmaschine für elektronische Bauteile |
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DM74AS573WM Datenblatt(PDF) 1 Page - Fairchild Semiconductor |
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DM74AS573WM Datenblatt(HTML) 1 Page - Fairchild Semiconductor |
1 / 6 page © 2000 Fairchild Semiconductor Corporation DS006313 www.fairchildsemi.com October 1986 Revised March 2000 DM74AS573 Octal D-Type Transparent Latch with 3-STATE Outputs General Description These 8-bit registers feature totem-pole 3-STATE outputs designed specifically for driving highly-capacitive or rela- tively low-impedance loads. The high-impedance state and increased HIGH-logic-level drive provide these registers with the capability of being connected directly to and driv- ing the bus lines in a bus-organized system without need for interface or pull-up components. They are particularly attractive for implementing buffer registers, I/O ports, bidi- rectional bus drivers, and working registers. The eight latches of the DM74AS573 are transparent D- type latches, meaning that while the enable (G) is HIGH the Q outputs will follow the data (D) inputs. When the enable is taken LOW the output will be latched at the level of the data that was set UP. A buffered output control input can be used to place the eight outputs in either a normal logic state (HIGH or LOW logic levels) or a high-impedance state. In the high-imped- ance state the outputs neither load nor drive the bus lines significantly. The output control does not affect the internal operation of the latches. That is, the old data can be retained or new data can be entered even while the outputs are OFF. The pin-out is arranged to ease printed circuit board layout. All data inputs are on one side of the package while all the outputs are on the other side. Features s Switching specifications at 50 pF s Switching specifications guaranteed over full tempera- ture and VCC range s Advanced oxide-isolated, ion-implanted Schottky TTL process s Functionally equivalent with DM74S373 s Improved AC performance over DM74S373 at approxi- mately half the power s 3-STATE buffer-type outputs drive bus lines directly s Bus structured pinout Ordering Code: Devices also available in Tape and Reel. Specify by appending the suffix letter “X” to the ordering code. Connection Diagram Order Number Package Number Package Description DM74AS573WM M20B 20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300 Wide DM74AS573N N20A 20-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide |
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